/* ============================================================
   DESIGN SYSTEM v2
   现代、专业、统一的视觉语言
   ============================================================ */

/* --- Color Palette --- */
:root {
    /* Primary Colors */
    --blue-600: #2563eb;
    --blue-500: #3b82f6;
    --blue-400: #60a5fa;
    --blue-100: #dbeafe;
    --blue-50: #eff6ff;

    /* Accent Colors */
    --violet-600: #7c3aed;
    --violet-500: #8b5cf6;
    --violet-400: #a78bfa;
    --violet-100: #ede9fe;

    --emerald-600: #059669;
    --emerald-500: #10b981;
    --emerald-100: #d1fae5;

    --amber-600: #d97706;
    --amber-500: #f59e0b;
    --amber-100: #fef3c7;

    --red-600: #dc2626;
    --red-500: #ef4444;
    --red-100: #fee2e2;

    --rose-500: #f43f5e;
    --rose-100: #ffe4e6;

    --cyan-500: #06b6d4;
    --cyan-100: #cffafe;

    /* Code Block Colors */
    --code-bg: #1e293b;
    --code-text: #e2e8f0;
    --code-keyword: #c084fc;
    --code-string: #34d399;
    --code-comment: #64748b;
    --code-number: #f59e0b;
    --code-function: #60a5fa;

    /* Gray Scale - 使用温暖的 gray 色调 */
    --gray-900: #111827;
    --gray-800: #1f2937;
    --gray-700: #374151;
    --gray-600: #4b5563;
    --gray-500: #6b7280;
    --gray-400: #9ca3af;
    --gray-300: #d1d5db;
    --gray-200: #e5e7eb;
    --gray-100: #f3f4f6;
    --gray-50: #f9fafb;

    /* Semantic Colors */
    --primary: var(--blue-500);
    --primary-dark: var(--blue-600);
    --primary-light: var(--blue-400);
    --primary-bg: var(--blue-50);

    --success: var(--emerald-500);
    --success-bg: var(--emerald-100);

    --warning: var(--amber-500);
    --warning-bg: var(--amber-100);

    --danger: var(--red-500);
    --danger-bg: var(--red-100);

    /* Theme Variables */
    --bg-base: #ffffff;
    --bg-secondary: var(--gray-50);
    --bg-tertiary: var(--gray-100);
    --bg-overlay: rgba(0, 0, 0, 0.04);

    --text-primary: var(--gray-900);
    --text-secondary: var(--gray-600);
    --text-tertiary: var(--gray-500);
    --text-muted: var(--gray-400);

    --border-light: var(--gray-200);
    --border-base: var(--gray-300);
    --border-dark: var(--gray-400);

    /* Shadows - 6层阴影系统 */
    --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.04);
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06), 0 1px 2px rgba(0, 0, 0, 0.04);
    --shadow-base: 0 4px 6px rgba(0, 0, 0, 0.04), 0 2px 4px rgba(0, 0, 0, 0.03);
    --shadow-md: 0 10px 15px rgba(0, 0, 0, 0.05), 0 4px 6px rgba(0, 0, 0, 0.04);
    --shadow-lg: 0 20px 25px rgba(0, 0, 0, 0.06), 0 8px 10px rgba(0, 0, 0, 0.04);
    --shadow-xl: 0 25px 50px rgba(0, 0, 0, 0.1);

    /* Spacing Scale */
    --sp-1: 4px;
    --sp-2: 8px;
    --sp-3: 12px;
    --sp-4: 16px;
    --sp-5: 20px;
    --sp-6: 24px;
    --sp-8: 32px;
    --sp-10: 40px;
    --sp-12: 48px;
    --sp-16: 64px;
    --sp-20: 80px;

    /* Border Radius */
    --radius-xs: 4px;
    --radius-sm: 6px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    --radius-2xl: 20px;
    --radius-full: 9999px;

    /* Typography */
    --font-sans: 'MiSans', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
    --font-mono: ui-monospace, SFMono-Regular, 'SF Mono', Menlo, Consolas, 'Liberation Mono', monospace;

    --text-xs: 0.6875rem;
    --text-sm: 0.8125rem;
    --text-base: 0.9375rem;
    --text-lg: 1.0625rem;
    --text-xl: 1.1875rem;
    --text-2xl: 1.375rem;
    --text-3xl: 1.6875rem;
    --text-4xl: 2rem;

    --leading-tight: 1.3;
    --leading-normal: 1.7;
    --leading-relaxed: 1.8;

    --tracking-tight: -0.025em;
    --tracking-normal: 0;
    --tracking-wide: 0.025em;

    /* Transitions */
    --ease-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --ease-base: 200ms cubic-bezier(0.4, 0, 0.2, 1);
    --ease-slow: 300ms cubic-bezier(0.4, 0, 0.2, 1);
    --ease-slower: 400ms cubic-bezier(0.4, 0, 0.2, 1);

    /* Z-index Scale */
    --z-dropdown: 100;
    --z-sticky: 200;
    --z-fixed: 300;
    --z-modal: 400;
    --z-toast: 500;
}

/* --- Dark Theme --- */
body.dark {
    --primary: var(--blue-400);
    --primary-dark: var(--blue-500);
    --primary-light: var(--blue-600);
    --primary-bg: rgba(59, 130, 246, 0.15);

    --bg-base: #0f1117;
    --bg-secondary: #161822;
    --bg-tertiary: #1e2030;
    --bg-overlay: rgba(255, 255, 255, 0.04);

    --text-primary: #f1f5f9;
    --text-secondary: #cbd5e1;
    --text-tertiary: #94a3b8;
    --text-muted: #64748b;

    --border-light: #1e293b;
    --border-base: #334155;
    --border-dark: #475569;

    --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.3);
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.35);
    --shadow-base: 0 4px 6px rgba(0, 0, 0, 0.4);
    --shadow-md: 0 10px 15px rgba(0, 0, 0, 0.45);
    --shadow-lg: 0 20px 25px rgba(0, 0, 0, 0.5);
    --shadow-xl: 0 25px 50px rgba(0, 0, 0, 0.6);
}

/* ============================================================
   RESET & BASE
   ============================================================ */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
    overflow-x: hidden;
}

body {
    font-family: var(--font-sans);
    font-size: var(--text-base);
    line-height: var(--leading-normal);
    color: var(--text-primary);
    background: var(--bg-base);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    transition: background var(--ease-base), color var(--ease-base);
    text-rendering: optimizeLegibility;
    -webkit-text-size-adjust: 100%;
    word-wrap: break-word;
    overflow-x: hidden;
}

a {
    color: inherit;
    text-decoration: none;
    transition: color var(--ease-fast);
}

button {
    font-family: inherit;
    font-size: inherit;
    cursor: pointer;
    border: none;
    background: none;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

/* Typography Optimizations */
p {
    line-height: var(--leading-relaxed);
    margin-bottom: var(--sp-4);
}

p:last-child {
    margin-bottom: 0;
}

h1, h2, h3, h4, h5, h6 {
    line-height: var(--leading-tight);
    margin-bottom: var(--sp-4);
    color: var(--text-primary);
}

h1:last-child, h2:last-child, h3:last-child, h4:last-child, h5:last-child, h6:last-child {
    margin-bottom: 0;
}

/* Heading hierarchy */
h1 { font-size: var(--text-4xl); font-weight: 800; letter-spacing: var(--tracking-tight); }
h2 { font-size: var(--text-2xl); font-weight: 800; letter-spacing: var(--tracking-tight); }
h3 { font-size: var(--text-xl); font-weight: 700; letter-spacing: var(--tracking-tight); color: var(--text-primary); border-left: 3px solid var(--primary); padding-left: var(--sp-3); margin-top: var(--sp-6); }
h4 { font-size: var(--text-base); font-weight: 700; }
h5 { font-size: var(--text-sm); font-weight: 600; }
h6 { font-size: var(--text-xs); font-weight: 600; text-transform: uppercase; letter-spacing: var(--tracking-wide); }

/* H3 inside tutorial step body - slightly different from global */
.tutorial-step__body h3 {
    font-size: var(--text-xl);
    font-weight: 700;
    color: var(--primary);
    border-left: none;
    padding-left: 0;
    margin-top: var(--sp-6);
    margin-bottom: var(--sp-3);
}

strong, b {
    font-weight: 700;
}

em, i {
    font-style: italic;
}

small {
    font-size: 0.875em;
}

/* Chinese text optimization */
:lang(zh) {
    line-height: 1.8;
}

:lang(zh) h1,
:lang(zh) h2,
:lang(zh) h3,
:lang(zh) h4 {
    line-height: 1.4;
}

ul, ol {
    list-style: none;
}

/* Container */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--sp-6);
}

@media (max-width: 768px) {
    .container {
        padding: 0 var(--sp-4);
    }
}

/* ============================================================
   HEADER / NAVIGATION
   ============================================================ */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: var(--z-fixed);
    background: rgba(255, 255, 255, 0.92);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-light);
    transition: background var(--ease-base), border-color var(--ease-base);
    overflow: visible;
}

body.dark .header {
    background: rgba(15, 17, 23, 0.92);
}

.nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 64px;
}

/* Brand */
.nav__brand a {
    display: flex;
    align-items: center;
    gap: var(--sp-2);
    font-size: var(--text-xl);
    font-weight: 800;
    color: var(--primary);
    letter-spacing: var(--tracking-tight);
}

/* Navigation Menu */
.nav__menu {
    display: flex;
    align-items: center;
    gap: var(--sp-1);
    overflow-x: visible;
}

.nav__menu::-webkit-scrollbar {
    display: none;
}

.nav__main-link {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: var(--sp-2) var(--sp-4);
    border-radius: var(--radius-md);
    font-size: var(--text-sm);
    font-weight: 500;
    color: var(--text-secondary);
    line-height: 1.4;
    transition: all var(--ease-fast);
}

.nav__dropdown-arrow {
    display: inline-block;
    font-size: 0.7em;
    transition: transform var(--ease-fast);
}

.nav__dropdown:hover .nav__dropdown-arrow {
    transform: rotate(180deg);
}

/* Dropdown Menu */
.nav__dropdown {
    position: relative;
}

.nav__dropdown-menu {
    position: absolute;
    top: calc(100% + 8px);
    left: 50%;
    transform: translateX(-50%) translateY(4px);
    min-width: 180px;
    background: var(--bg-base);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    padding: var(--sp-2);
    opacity: 0;
    visibility: hidden;
    transition: all var(--ease-fast);
    z-index: var(--z-dropdown);
}

.nav__dropdown-menu::before {
    content: '';
    position: absolute;
    top: -6px;
    left: 50%;
    transform: translateX(-50%) rotate(45deg);
    width: 12px;
    height: 12px;
    background: var(--bg-base);
    border-left: 1px solid var(--border-light);
    border-top: 1px solid var(--border-light);
}

.nav__dropdown:hover .nav__dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateX(-50%) translateY(0);
}

.nav__dropdown.open .nav__dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateX(-50%) translateY(0);
}

.nav__dropdown-menu li a {
    display: block;
    padding: var(--sp-2) var(--sp-3);
    font-size: var(--text-sm);
    color: var(--text-secondary);
    border-radius: var(--radius-md);
    transition: all var(--ease-fast);
    line-height: 1.4;
}

.nav__dropdown-menu li a:hover {
    background: var(--bg-secondary);
    color: var(--text-primary);
}

/* Divider in dropdown */
.nav__dropdown-menu a.nav__divider {
    pointer-events: none;
    font-size: 11px;
    color: var(--text-tertiary);
    padding: 4px 12px;
    letter-spacing: 0.5px;
    text-transform: uppercase;
    border-bottom: 1px solid var(--border);
    margin: 4px 0 2px;
    cursor: default;
    opacity: 0.6;
}
.nav__dropdown-menu a.nav__divider:hover {
    background: transparent;
    color: var(--text-tertiary);
}

.nav__main-link:hover {
    color: var(--text-primary);
    background: var(--bg-secondary);
}

.nav__main-link.active {
    color: var(--primary);
    background: var(--primary-bg);
    font-weight: 600;
}

.nav__cps-link {
    background: linear-gradient(135deg, var(--blue-500), var(--violet-500));
    color: #fff !important;
    font-weight: 600 !important;
    border-radius: var(--radius-full);
    padding: var(--sp-2) var(--sp-5) !important;
    box-shadow: 0 2px 8px rgba(59, 130, 246, 0.3);
    transition: all var(--ease-fast) !important;
}

.nav__cps-link:hover {
    background: linear-gradient(135deg, var(--blue-600), var(--violet-600)) !important;
    box-shadow: 0 4px 12px rgba(59, 130, 246, 0.4);
    transform: translateY(-1px);
}

/* Theme Toggle */
.theme-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    font-size: var(--text-lg);
    transition: all var(--ease-fast);
    margin-left: var(--sp-2);
}

.theme-toggle:hover {
    color: var(--text-primary);
    background: var(--bg-secondary);
}

/* Mobile Menu Toggle */
.nav__toggle {
    display: none;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    width: 36px;
    height: 36px;
    gap: 5px;
}

.nav__toggle span {
    display: block;
    width: 20px;
    height: 2px;
    background: var(--text-primary);
    border-radius: var(--radius-xs);
    transition: all var(--ease-fast);
}

.nav__toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.nav__toggle.active span:nth-child(2) {
    opacity: 0;
}

.nav__toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

/* Mobile Responsive */
@media (max-width: 768px) {
    .nav__toggle {
        display: flex;
    }

    .nav__menu {
        position: fixed;
        top: 64px;
        left: 0;
        right: 0;
        background: var(--bg-base);
        flex-direction: column;
        align-items: stretch;
        padding: var(--sp-4);
        gap: var(--sp-1);
        box-shadow: var(--shadow-lg);
        border-bottom: 1px solid var(--border-light);
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: all var(--ease-slow);
        max-height: calc(100vh - 64px);
        overflow-y: auto;
    }

    .nav__menu.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }

    .nav__main-link {
        display: block;
        padding: var(--sp-3) var(--sp-4);
        font-size: var(--text-base);
    }

    .theme-toggle {
        margin-left: 0;
        align-self: flex-end;
    }

    /* Mobile Dropdown */
    .nav__dropdown-menu {
        position: static;
        opacity: 1;
        visibility: visible;
        transform: none;
        box-shadow: none;
        border: none;
        border-left: 2px solid var(--border-light);
        border-radius: 0;
        margin-left: var(--sp-4);
        margin-top: var(--sp-2);
        padding: var(--sp-2);
        display: none;
        background: transparent;
    }

    .nav__dropdown-menu::before {
        display: none;
    }

    .nav__dropdown.open .nav__dropdown-menu {
        display: block;
    }

    .nav__dropdown-arrow {
        float: right;
    }
}

/* ============================================================
   HERO SECTION
   ============================================================ */
.hero {
    position: relative;
    margin-top: 64px;
    padding: var(--sp-20) var(--sp-6) var(--sp-16);
    text-align: center;
    background: linear-gradient(135deg, var(--blue-600) 0%, var(--violet-500) 50%, var(--rose-500) 100%);
    color: #fff;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background: 
        radial-gradient(circle at 20% 80%, rgba(255, 255, 255, 0.08) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(255, 255, 255, 0.06) 0%, transparent 50%),
        url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.03'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
}

.hero__content {
    position: relative;
    z-index: 1;
    max-width: 720px;
    margin: 0 auto;
}

.hero h1 {
    font-size: var(--text-4xl);
    font-weight: 800;
    letter-spacing: var(--tracking-tight);
    line-height: 1.25;
    margin-bottom: var(--sp-4);
}

.hero__subtitle {
    font-size: var(--text-lg);
    font-weight: 500;
    opacity: 0.9;
    margin-bottom: var(--sp-3);
    line-height: 1.5;
}

.hero__desc {
    font-size: var(--text-sm);
    opacity: 0.75;
    max-width: 560px;
    margin: 0 auto var(--sp-8);
    line-height: 1.8;
}

/* Hero Stats */
.hero__stats {
    display: flex;
    justify-content: center;
    gap: var(--sp-10);
    margin-bottom: var(--sp-8);
}

.hero__stat {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.hero__stat-num {
    font-size: var(--text-2xl);
    font-weight: 800;
    line-height: 1;
    margin-bottom: var(--sp-1);
}

.hero__stat-label {
    font-size: var(--text-xs);
    opacity: 0.75;
    text-transform: uppercase;
    letter-spacing: var(--tracking-wide);
}

/* Hero CTA */
.hero__cta {
    display: flex;
    justify-content: center;
    gap: var(--sp-4);
    flex-wrap: wrap;
}

/* Responsive */
@media (max-width: 768px) {
    .hero {
        padding: var(--sp-16) var(--sp-4) var(--sp-12);
    }

    .hero h1 {
        font-size: var(--text-3xl);
    }

    .hero__subtitle {
        font-size: var(--text-base);
    }

    .hero__stats {
        gap: var(--sp-6);
    }

    .hero__stat-num {
        font-size: var(--text-xl);
    }
}

@media (max-width: 480px) {
    .hero h1 {
        font-size: var(--text-2xl);
    }

    .hero__stats {
        flex-direction: column;
        gap: var(--sp-4);
    }

    .hero__cta {
        flex-direction: column;
        align-items: center;
    }
}

/* ============================================================
   BUTTONS
   ============================================================ */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--sp-2);
    padding: 12px 28px;
    border-radius: var(--radius-lg);
    font-size: var(--text-sm);
    font-weight: 600;
    line-height: 1.4;
    white-space: nowrap;
    transition: all var(--ease-fast);
    border: 1.5px solid transparent;
}

.btn:active {
    transform: scale(0.98);
}

/* Primary Button */
.btn--primary {
    background: var(--primary);
    color: #fff;
    border-color: var(--primary);
}

.btn--primary:hover {
    background: var(--primary-dark);
    border-color: var(--primary-dark);
    box-shadow: var(--shadow-md);
    transform: translateY(-1px);
}

/* White Button (for hero) */
.btn--white {
    background: #fff;
    color: var(--blue-600);
    border-color: #fff;
}

.btn--white:hover {
    background: var(--gray-50);
    box-shadow: var(--shadow-md);
    transform: translateY(-1px);
}

/* Outline Button */
.btn--outline {
    background: transparent;
    color: #fff;
    border-color: rgba(255, 255, 255, 0.4);
}

.btn--outline:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: #fff;
}

/* Ghost Button */
.btn--ghost {
    background: transparent;
    color: #fff;
    border-color: rgba(255, 255, 255, 0.3);
}

.btn--ghost:hover {
    background: rgba(255, 255, 255, 0.08);
    border-color: rgba(255, 255, 255, 0.5);
}

/* Accent Button */
.btn--accent {
    background: linear-gradient(135deg, var(--blue-500), var(--violet-500));
    color: #fff;
}

.btn--accent:hover {
    box-shadow: 0 4px 14px rgba(59, 130, 246, 0.35);
    transform: translateY(-1px);
}

/* Small Button */
.btn--sm {
    padding: 8px 18px;
    font-size: var(--text-xs);
    border-radius: var(--radius-md);
}

/* Link Button */
.btn-link {
    display: inline-flex;
    align-items: center;
    gap: var(--sp-1);
    font-size: var(--text-sm);
    font-weight: 600;
    color: var(--primary);
    transition: color var(--ease-fast);
}

.btn-link:hover {
    color: var(--primary-dark);
    text-decoration: underline;
}

.btn-link--primary {
    color: var(--blue-600);
}

.btn-link--primary:hover {
    color: var(--violet-600);
}

/* ============================================================
   SECTIONS
   ============================================================ */
.section {
    padding: var(--sp-16) 0;
}

.section--alt {
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-light);
    border-bottom: 1px solid var(--border-light);
}

.section__header {
    text-align: center;
    max-width: 640px;
    margin: 0 auto var(--sp-10);
}

.section__title {
    font-size: var(--text-2xl);
    font-weight: 800;
    color: var(--text-primary);
    letter-spacing: var(--tracking-tight);
    margin-bottom: var(--sp-3);
    line-height: 1.3;
}

.section__desc {
    font-size: var(--text-sm);
    color: var(--text-tertiary);
    line-height: 1.8;
}

@media (max-width: 768px) {
    .section {
        padding: var(--sp-12) 0;
    }

    .section__title {
        font-size: var(--text-xl);
    }
}

/* ============================================================
   TABS
   ============================================================ */
.sub-tabs {
    display: flex;
    gap: var(--sp-1);
    margin-bottom: var(--sp-8);
    padding: var(--sp-1);
    background: var(--bg-tertiary);
    border-radius: var(--radius-lg);
    width: fit-content;
    margin-left: auto;
    margin-right: auto;
}

.sub-tab {
    padding: var(--sp-3) var(--sp-6);
    border-radius: var(--radius-md);
    font-size: var(--text-sm);
    font-weight: 500;
    color: var(--text-tertiary);
    transition: all var(--ease-fast);
}

.sub-tab:hover {
    color: var(--text-primary);
}

.sub-tab.active {
    background: var(--bg-base);
    color: var(--text-primary);
    font-weight: 600;
    box-shadow: var(--shadow-xs);
}

.sub-tab-content {
    display: none;
}

.sub-tab-content.active {
    display: block;
}

@media (max-width: 640px) {
    .sub-tabs {
        width: 100%;
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
    }

    .sub-tab {
        white-space: nowrap;
        flex-shrink: 0;
    }
}

/* ============================================================
   TABLE CONTROLS
   ============================================================ */
.table-controls {
    display: flex;
    gap: var(--sp-3);
    margin-bottom: var(--sp-6);
    flex-wrap: wrap;
}

.table-search,
.table-sort {
    padding: var(--sp-3) var(--sp-4);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-md);
    background: var(--bg-base);
    color: var(--text-primary);
    font-size: var(--text-sm);
    line-height: 1.5;
    transition: all var(--ease-fast);
}

.table-search {
    flex: 1;
    min-width: 200px;
}

.table-search:focus,
.table-sort:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px var(--primary-bg);
}

@media (max-width: 640px) {
    .table-controls {
        flex-direction: column;
    }

    .table-search,
    .table-sort {
        width: 100%;
    }
}

/* ============================================================
   DATA TABLES
   ============================================================ */
.table-wrapper {
    background: var(--bg-base);
    border-radius: var(--radius-xl);
    border: 1px solid var(--border-light);
    box-shadow: var(--shadow-sm);
    overflow: hidden;
}

.table-responsive {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}

.comparison-table {
    width: 100%;
    border-collapse: collapse;
    font-size: var(--text-sm);
    line-height: 1.6;
}

.comparison-table thead th {
    padding: var(--sp-4) var(--sp-5);
    text-align: left;
    font-size: var(--text-xs);
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: var(--tracking-wide);
    color: var(--text-tertiary);
    background: var(--bg-secondary);
    border-bottom: 2px solid var(--border-light);
    white-space: nowrap;
    line-height: 1.4;
}

.comparison-table tbody tr {
    border-bottom: 1px solid var(--border-light);
    transition: background var(--ease-fast);
}

.comparison-table tbody tr:last-child {
    border-bottom: none;
}

.comparison-table tbody tr:hover {
    background: var(--bg-overlay);
}

.comparison-table tbody td {
    padding: var(--sp-5) var(--sp-5);
    vertical-align: middle;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* Highlight Row */
.highlight-row {
    background: linear-gradient(90deg, var(--primary-bg), transparent);
}

.highlight-row:hover {
    background: linear-gradient(90deg, var(--primary-bg), var(--bg-secondary));
}

/* Platform Name Cell */
.platform-name {
    display: flex;
    align-items: center;
    gap: var(--sp-3);
    line-height: 1.3;
}

.platform-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: var(--bg-tertiary);
    border-radius: var(--radius-md);
    font-size: 1.25rem;
    flex-shrink: 0;
}

.platform-name strong {
    display: block;
    font-size: var(--text-sm);
    font-weight: 700;
    color: var(--text-primary);
    line-height: 1.3;
}

.platform-name small {
    display: block;
    font-size: var(--text-xs);
    color: var(--text-muted);
    margin-top: 3px;
    line-height: 1.3;
}

/* Price Display */
.price {
    display: block;
    font-size: var(--text-sm);
    font-weight: 700;
    color: var(--primary);
    line-height: 1.3;
}

td small {
    display: block;
    font-size: var(--text-xs);
    color: var(--text-muted);
    margin-top: 4px;
    line-height: 1.3;
}

/* No Link Cell */
.no-link {
    font-size: var(--text-xs);
    color: var(--text-muted);
    font-style: italic;
}

@media (max-width: 768px) {
    .comparison-table {
        font-size: var(--text-xs);
    }

    .comparison-table thead th,
    .comparison-table tbody td {
        padding: var(--sp-3) var(--sp-4);
    }

    .platform-icon {
        width: 32px;
        height: 32px;
        font-size: 1rem;
    }
}

/* ============================================================
   BADGES / TAGS
   ============================================================ */
/* Badge Colors */
.badge,
.tag {
    display: inline-flex;
    align-items: center;
    padding: 3px 10px;
    border-radius: var(--radius-full);
    font-size: var(--text-xs);
    font-weight: 600;
    line-height: 1.6;
    white-space: nowrap;
}

/* Badge Colors */
.badge--blue {
    background: var(--blue-100);
    color: var(--blue-600);
}

.badge--green {
    background: var(--emerald-100);
    color: var(--emerald-600);
}

.badge--orange {
    background: var(--warning-bg);
    color: var(--amber-600);
}

.badge--red {
    background: var(--danger-bg);
    color: var(--red-600);
}

.badge--purple {
    background: var(--violet-100);
    color: var(--violet-600);
}

.badge--teal {
    background: var(--cyan-100);
    color: var(--cyan-500);
}

.badge--gray {
    background: var(--bg-tertiary);
    color: var(--text-muted);
}

/* Tag Colors */
.tag--blue {
    background: var(--blue-100);
    color: var(--blue-600);
}

.tag--green {
    background: var(--emerald-100);
    color: var(--emerald-600);
}

.tag--orange {
    background: var(--warning-bg);
    color: var(--amber-600);
}

.tag--red {
    background: var(--danger-bg);
    color: var(--red-600);
}

.tag--purple {
    background: var(--violet-100);
    color: var(--violet-600);
}

.tag--teal {
    background: var(--cyan-100);
    color: var(--cyan-500);
}

.tag--accent {
    background: linear-gradient(135deg, var(--blue-500), var(--violet-500));
    color: #fff;
}

/* Dark Mode Adjustments */
body.dark .badge--blue,
body.dark .tag--blue {
    background: rgba(59, 130, 246, 0.15);
    color: var(--blue-400);
}

body.dark .badge--green,
body.dark .tag--green {
    background: rgba(16, 185, 129, 0.15);
    color: var(--emerald-500);
}

body.dark .badge--orange,
body.dark .tag--orange {
    background: rgba(245, 158, 11, 0.15);
    color: var(--amber-500);
}

body.dark .badge--red,
body.dark .tag--red {
    background: rgba(239, 68, 68, 0.15);
    color: var(--red-500);
}

body.dark .badge--purple,
body.dark .tag--purple {
    background: rgba(139, 92, 246, 0.15);
    color: var(--violet-400);
}

body.dark .badge--teal,
body.dark .tag--teal {
    background: rgba(6, 182, 212, 0.15);
    color: var(--cyan-500);
}

body.dark .badge--gray {
    background: var(--bg-tertiary);
    color: var(--text-muted);
}

/* ============================================================
   PRICING CARDS
   ============================================================ */
.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(360px, 1fr));
    gap: var(--sp-6);
}

.p-card {
    background: var(--bg-base);
    border-radius: var(--radius-xl);
    border: 1px solid var(--border-light);
    box-shadow: var(--shadow-sm);
    overflow: hidden;
    transition: all var(--ease-slow);
    display: flex;
    flex-direction: column;
    height: 100%;
}

.p-card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-2px);
}

/* CPS Highlighted Card */
.p-card--cps {
    border: 2px solid var(--primary);
    position: relative;
}

.p-card--cps::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--blue-500), var(--violet-500));
}

/* Card Header */
.p-card__head {
    display: flex;
    align-items: center;
    gap: var(--sp-4);
    padding: var(--sp-6);
    border-bottom: 1px solid var(--border-light);
}

.p-card__icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 48px;
    height: 48px;
    background: var(--bg-tertiary);
    border-radius: var(--radius-lg);
    font-size: 1.5rem;
    flex-shrink: 0;
}

.p-card__title {
    flex: 1;
    font-size: var(--text-lg);
    font-weight: 700;
    color: var(--text-primary);
    line-height: 1.3;
}

/* Tier Row */
.tier {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    padding: var(--sp-5) var(--sp-6);
    border-bottom: 1px solid var(--border-light);
    transition: background var(--ease-fast);
}

.tier:last-child {
    border-bottom: none;
}

.tier--featured {
    background: var(--primary-bg);
}

.tier__info {
    flex: 1;
}

.tier__name {
    font-size: var(--text-sm);
    font-weight: 700;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: var(--sp-2);
    margin-bottom: var(--sp-2);
    line-height: 1.3;
}

.tier__usage {
    font-size: var(--text-xs);
    color: var(--text-tertiary);
    line-height: 1.6;
}

.tier__price {
    text-align: right;
    flex-shrink: 0;
    margin-left: var(--sp-6);
}

.tier__price-val {
    font-size: var(--text-base);
    font-weight: 800;
    color: var(--primary);
    line-height: 1.3;
}

.tier__price-note {
    font-size: var(--text-xs);
    color: var(--text-muted);
    margin-top: 4px;
    line-height: 1.3;
}

/* Card Notice */
.p-card__notice {
    margin: var(--sp-4) var(--sp-6);
    padding: var(--sp-4) var(--sp-5);
    background: var(--warning-bg);
    border: 1px solid rgba(245, 158, 11, 0.2);
    border-radius: var(--radius-md);
    font-size: var(--text-xs);
    color: var(--amber-600);
    line-height: 1.7;
}

body.dark .p-card__notice {
    background: rgba(245, 158, 11, 0.1);
}

/* Tools Section */
.p-card__tools {
    padding: var(--sp-4) var(--sp-6) var(--sp-6);
}

.p-card__tools h4 {
    font-size: var(--text-xs);
    font-weight: 700;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: var(--tracking-wide);
    margin-bottom: var(--sp-3);
    line-height: 1.3;
}

.tool-chips {
    display: flex;
    flex-wrap: wrap;
    gap: var(--sp-2);
}

.tool-chip {
    display: inline-block;
    padding: var(--sp-1) var(--sp-3);
    background: var(--bg-secondary);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-sm);
    font-size: var(--text-xs);
    font-weight: 500;
    color: var(--text-secondary);
    transition: all var(--ease-fast);
    line-height: 1.5;
}

.tool-chip:hover {
    background: var(--bg-tertiary);
    border-color: var(--border-base);
}

/* Card CTA */
.p-card__cta {
    padding: var(--sp-4) var(--sp-6) var(--sp-6);
    margin-top: auto;
    border-top: 1px solid var(--border-light);
}

.p-card__cta + .p-card__cta {
    border-top: none;
    padding-top: 0;
}

/* Action Button */
.action-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--sp-2);
    padding: var(--sp-3) var(--sp-6);
    background: linear-gradient(135deg, var(--blue-500), var(--violet-500));
    color: #fff;
    border-radius: var(--radius-md);
    font-size: var(--text-sm);
    font-weight: 600;
    transition: all var(--ease-fast);
    box-shadow: 0 2px 8px rgba(59, 130, 246, 0.25);
}

.action-btn:hover {
    box-shadow: 0 4px 16px rgba(59, 130, 246, 0.35);
    transform: translateY(-1px);
}

.action-btn--full {
    display: flex;
    width: 100%;
    padding: var(--sp-4) 0;
    text-align: center;
}

/* Responsive */
@media (max-width: 768px) {
    .card-grid {
        grid-template-columns: 1fr;
    }

    .tier {
        flex-direction: column;
        gap: var(--sp-2);
    }

    .tier__price {
        text-align: left;
        margin-left: 0;
    }
}

@media (max-width: 480px) {
    .p-card__head {
        padding: var(--sp-4);
    }

    .tier {
        padding: var(--sp-4);
    }

    .p-card__tools,
    .p-card__cta,
    .p-card__notice {
        padding-left: var(--sp-4);
        padding-right: var(--sp-4);
        margin-left: var(--sp-4);
        margin-right: var(--sp-4);
    }
}

/* ============================================================
   COMPARISON HIGHLIGHT BOX
   ============================================================ */
.comparison-highlight {
    background: linear-gradient(135deg, var(--primary-bg), var(--violet-100));
    border: 1px solid var(--blue-100);
    border-radius: var(--radius-xl);
    padding: var(--sp-8);
    margin-bottom: var(--sp-8);
}

body.dark .comparison-highlight {
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.1), rgba(139, 92, 246, 0.1));
    border-color: rgba(59, 130, 246, 0.2);
}

.comparison-highlight__title {
    font-size: var(--text-lg);
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--sp-3);
    line-height: 1.4;
}

.comparison-highlight__content {
    font-size: var(--text-sm);
    color: var(--text-secondary);
    line-height: 1.8;
}

.comparison-highlight__content p {
    margin-bottom: var(--sp-3);
    line-height: 1.8;
}

.comparison-highlight__content p:last-child {
    margin-bottom: 0;
}

/* ============================================================
   FEATURE LIST
   ============================================================ */
.feature-list {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--sp-6);
    margin-top: var(--sp-10);
}

.feature-item {
    display: flex;
    gap: var(--sp-4);
    padding: var(--sp-6);
    background: var(--bg-base);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-sm);
    transition: all var(--ease-slow);
}

.feature-item:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.feature-item__icon {
    font-size: 1.75rem;
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--primary-bg);
    border-radius: var(--radius-lg);
    flex-shrink: 0;
}

.feature-item__content h4 {
    font-size: var(--text-base);
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--sp-2);
    line-height: 1.4;
}

.feature-item__content p {
    font-size: var(--text-sm);
    color: var(--text-secondary);
    line-height: 1.8;
}

@media (max-width: 640px) {
    .feature-list {
        grid-template-columns: 1fr;
    }

    .feature-item {
        flex-direction: column;
        align-items: flex-start;
    }
}

/* ============================================================
   PRICING CARDS
   ============================================================ */
.pricing-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--sp-6);
    margin-top: var(--sp-10);
}

.pricing-card {
    background: var(--bg-base);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-xl);
    padding: var(--sp-8);
    text-align: center;
    box-shadow: var(--shadow-sm);
    transition: all var(--ease-slow);
    position: relative;
}

.pricing-card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-2px);
}

.pricing-card--featured {
    border: 2px solid var(--primary);
}

.pricing-card__badge {
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    background: linear-gradient(135deg, var(--blue-500), var(--violet-500));
    color: #fff;
    padding: var(--sp-1) var(--sp-4);
    border-radius: var(--radius-full);
    font-size: var(--text-xs);
    font-weight: 700;
}

.pricing-card__icon {
    font-size: 2rem;
    margin-bottom: var(--sp-4);
}

.pricing-card__name {
    font-size: var(--text-lg);
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--sp-3);
    line-height: 1.3;
}

.pricing-card__price {
    font-size: var(--text-2xl);
    font-weight: 800;
    color: var(--primary);
    margin-bottom: var(--sp-6);
    line-height: 1.2;
}

.pricing-card__price small {
    font-size: var(--text-sm);
    font-weight: 500;
    color: var(--text-muted);
    line-height: 1.3;
}

.pricing-card__features {
    text-align: left;
    margin-bottom: var(--sp-6);
}

.pricing-card__features li {
    padding: var(--sp-2) 0;
    font-size: var(--text-sm);
    color: var(--text-secondary);
    border-bottom: 1px solid var(--border-light);
    line-height: 1.6;
}

.pricing-card__features li:last-child {
    border-bottom: none;
}

@media (max-width: 640px) {
    .pricing-grid {
        grid-template-columns: 1fr;
    }
}

/* ============================================================
   PERFORMANCE CARDS
   ============================================================ */
.cards-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--sp-6);
    margin-top: var(--sp-10);
}

@media (max-width: 900px) {
    .cards-grid {
        grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    }
}

.perf-card {
    background: var(--bg-base);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-xl);
    padding: var(--sp-6);
    box-shadow: var(--shadow-sm);
    transition: all var(--ease-slow);
}

.perf-card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-2px);
}

.perf-card__content {
    margin-bottom: var(--sp-6);
}

.perf-card__content p {
    font-size: var(--text-sm);
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: var(--sp-3);
}

.perf-card__content pre {
    background: #0d1117;
    color: #e6edf3;
    border-radius: 8px;
    padding: var(--sp-4);
    overflow-x: auto;
    margin: var(--sp-3) 0;
    border: 1px solid rgba(88, 166, 255, 0.1);
    font-size: 13px;
    line-height: 1.6;
}

.perf-card__content code {
    font-family: var(--font-mono);
    font-size: var(--text-xs);
    color: var(--text-primary);
    line-height: 1.6;
}

.perf-card__content ul {
    padding-left: var(--sp-4);
    margin: var(--sp-3) 0;
}

.perf-card__content ul li {
    font-size: var(--text-sm);
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: var(--sp-2);
    list-style: disc;
}

.perf-card__header {
    display: flex;
    align-items: center;
    gap: var(--sp-3);
    margin-bottom: var(--sp-6);
}

.perf-card__icon {
    font-size: 1.5rem;
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-tertiary);
    border-radius: var(--radius-md);
    flex-shrink: 0;
}

.perf-card__header h3 {
    flex: 1;
    font-size: var(--text-base);
    font-weight: 700;
    color: var(--text-primary);
    line-height: 1.4;
}

.perf-card__score {
    text-align: center;
    padding: var(--sp-6);
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    margin-bottom: var(--sp-6);
}

.perf-card__num {
    display: block;
    font-size: var(--text-4xl);
    font-weight: 800;
    color: var(--primary);
    line-height: 1;
    margin-bottom: var(--sp-2);
}

.perf-card__label {
    font-size: var(--text-xs);
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: var(--tracking-wide);
}

.perf-card__bars {
    display: flex;
    flex-direction: column;
    gap: var(--sp-4);
    margin-bottom: var(--sp-6);
}

.perf-bar {
    display: flex;
    align-items: center;
    gap: var(--sp-3);
}

.perf-bar__label {
    width: 80px;
    font-size: var(--text-sm);
    color: var(--text-secondary);
    flex-shrink: 0;
}

.perf-bar__track {
    flex: 1;
    height: 8px;
    background: var(--bg-tertiary);
    border-radius: var(--radius-full);
    overflow: hidden;
}

.perf-bar__fill {
    height: 100%;
    background: linear-gradient(90deg, var(--blue-500), var(--violet-500));
    border-radius: var(--radius-full);
    transition: width var(--ease-slower);
}

.perf-card__cta {
    text-align: center;
    padding-top: var(--sp-4);
    border-top: 1px solid var(--border-light);
}

@media (max-width: 768px) {
    .cards-grid {
        grid-template-columns: 1fr;
    }

    .perf-bar {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--sp-2);
    }

    .perf-bar__label {
        width: auto;
    }

    .perf-bar__track {
        width: 100%;
    }
}

/* ============================================================
   CTA BANNER
   ============================================================ */
.cta-banner {
    position: relative;
    background: linear-gradient(135deg, var(--blue-600) 0%, var(--violet-500) 100%);
    border-radius: var(--radius-2xl);
    padding: var(--sp-12) var(--sp-10);
    text-align: center;
    color: #fff;
    overflow: hidden;
    max-width: 720px;
    margin: 0 auto;
}

.cta-banner::before {
    content: '';
    position: absolute;
    inset: 0;
    background: 
        radial-gradient(circle at 70% 30%, rgba(255, 255, 255, 0.12) 0%, transparent 60%),
        url("data:image/svg+xml,%3Csvg width='40' height='40' viewBox='0 0 40 40' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='%23ffffff' fill-opacity='0.04' fill-rule='evenodd'%3E%3Cpath d='M0 40L40 0H20L0 20M40 40V20L20 40'/%3E%3C/g%3E%3C/svg%3E");
}

.cta-banner h3 {
    position: relative;
    font-size: var(--text-2xl);
    font-weight: 800;
    letter-spacing: var(--tracking-tight);
    margin-bottom: var(--sp-3);
}

.cta-banner p {
    position: relative;
    font-size: var(--text-sm);
    opacity: 0.85;
    margin-bottom: var(--sp-6);
}

.cta-banner .btn {
    position: relative;
}

@media (max-width: 640px) {
    .cta-banner {
        padding: var(--sp-8) var(--sp-6);
    }

    .cta-banner h3 {
        font-size: var(--text-xl);
    }
}

/* ============================================================
   FAQ SECTION
   ============================================================ */
.faq-list {
    max-width: 720px;
    margin: 0 auto;
}

.faq-item {
    background: var(--bg-base);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-lg);
    margin-bottom: var(--sp-3);
    overflow: hidden;
    transition: all var(--ease-fast);
    box-shadow: var(--shadow-xs);
}

.faq-item:hover {
    box-shadow: var(--shadow-sm);
}

.faq-item__q {
    width: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--sp-5) var(--sp-6);
    font-size: var(--text-sm);
    font-weight: 600;
    color: var(--text-primary);
    text-align: left;
    transition: color var(--ease-fast);
    line-height: 1.5;
}

.faq-item__q:hover {
    color: var(--primary);
}

.faq-item__icon {
    font-size: var(--text-lg);
    color: var(--primary);
    transition: transform var(--ease-slow);
    flex-shrink: 0;
    margin-left: var(--sp-4);
    line-height: 1;
}

.faq-item.active .faq-item__icon {
    transform: rotate(45deg);
}

.faq-item__a {
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--ease-slower);
}

.faq-item.active .faq-item__a {
    max-height: 400px;
}

.faq-item__a p {
    padding: 0 var(--sp-6) var(--sp-5);
    font-size: var(--text-sm);
    color: var(--text-secondary);
    line-height: 1.8;
}

/* ============================================================
   FOOTER
   ============================================================ */
.footer {
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-light);
    padding: var(--sp-12) 0 var(--sp-6);
}

.footer__content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: var(--sp-8);
    margin-bottom: var(--sp-8);
}

.footer__info h4 {
    font-size: var(--text-sm);
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--sp-3);
    line-height: 1.4;
}

.footer__info p {
    font-size: var(--text-sm);
    color: var(--text-tertiary);
    line-height: 1.8;
    margin-bottom: var(--sp-2);
}

.footer__info a {
    color: var(--primary);
    font-weight: 500;
    transition: color var(--ease-fast);
}

.footer__info a:hover {
    color: var(--primary-dark);
    text-decoration: underline;
}

.footer__bottom {
    padding-top: var(--sp-6);
    border-top: 1px solid var(--border-light);
    text-align: center;
}

.footer__bottom p {
    font-size: var(--text-xs);
    color: var(--text-muted);
}

@media (max-width: 640px) {
    .footer__content {
        grid-template-columns: 1fr;
        gap: var(--sp-6);
    }
}

/* ============================================================
   CODE BLOCK COPY BUTTON
   ============================================================ */
.code-block-wrapper {
    position: relative;
    margin: 28px 0;
    border-radius: 14px;
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.15), rgba(139, 92, 246, 0.15));
    padding: 2px;
    transition: all 0.3s ease;
}

.code-block-wrapper:hover {
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.25), rgba(139, 92, 246, 0.25));
    box-shadow: 0 8px 32px rgba(59, 130, 246, 0.15);
}

.code-block-wrapper .copy-btn {
    position: absolute;
    top: 50px;
    right: 12px;
    z-index: 3;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(30, 35, 50, 0.9);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.2s ease;
    padding: 0;
    backdrop-filter: blur(8px);
}

.code-block-wrapper .copy-btn:hover {
    background: rgba(59, 130, 246, 0.3);
    border-color: rgba(59, 130, 246, 0.5);
    transform: scale(1.05);
}

.code-block-wrapper .copy-btn:active {
    transform: scale(0.95);
}

.code-block-wrapper .copy-btn svg {
    width: 16px;
    height: 16px;
    stroke: #8b949e;
    fill: none;
    stroke-width: 2;
    stroke-linecap: round;
    stroke-linejoin: round;
    transition: stroke 0.2s ease;
}

.code-block-wrapper .copy-btn:hover svg {
    stroke: #58a6ff;
}

.code-block-wrapper .copy-btn.copied {
    background: rgba(40, 200, 64, 0.2);
    border-color: rgba(40, 200, 64, 0.4);
}

.code-block-wrapper .copy-btn.copied svg {
    stroke: #28c840;
}

.tutorial-content pre,
pre.code-block {
    background: linear-gradient(180deg, #1a1f2e 0%, #0d1117 30px, #0d1117 100%);
    color: #c9d1d9;
    border-radius: 0 0 12px 12px;
    padding: 0;
    margin: 0;
    overflow: hidden;
    font-family: 'JetBrains Mono', 'Fira Code', 'SF Mono', 'Cascadia Code', var(--font-mono);
    font-size: 13.5px;
    line-height: 1.75;
    position: relative;
    border: none;
    box-shadow:
        0 4px 24px rgba(0, 0, 0, 0.4),
        inset 0 1px 0 rgba(255, 255, 255, 0.03);
}

.code-block-wrapper pre,
.code-block-wrapper pre.code-block {
    margin: 0;
}

/* Code Header Bar */
.code-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 16px;
    background: linear-gradient(180deg, #252d3d 0%, #1e2433 100%);
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: 12px 12px 0 0;
}

.code-dots {
    display: flex;
    gap: 8px;
}

.code-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    box-shadow: inset 0 -2px 4px rgba(0, 0, 0, 0.2);
}

.code-dot--red { background: linear-gradient(135deg, #ff5f57, #e53935); }
.code-dot--yellow { background: linear-gradient(135deg, #febc2e, #f59e0b); }
.code-dot--green { background: linear-gradient(135deg, #28c840, #10b981); }

.code-lang {
    font-size: 12px;
    color: #6e7681;
    font-weight: 500;
    letter-spacing: 0.5px;
    text-transform: uppercase;
}

/* Code Content Area */
.tutorial-content pre code,
pre.code-block code {
    display: block;
    padding: 20px 20px 24px;
    overflow-x: auto;
    font-family: inherit;
    font-size: inherit;
    color: inherit;
    background: transparent;
    line-height: 1.75;
}

/* Custom Scrollbar for Code */
.tutorial-content pre::-webkit-scrollbar,
.tutorial-content pre code::-webkit-scrollbar {
    height: 6px;
}

.tutorial-content pre::-webkit-scrollbar-track,
.tutorial-content pre code::-webkit-scrollbar-track {
    background: rgba(0, 0, 0, 0.2);
    border-radius: 3px;
}

.tutorial-content pre::-webkit-scrollbar-thumb,
.tutorial-content pre code::-webkit-scrollbar-thumb {
    background: linear-gradient(90deg, #3b82f6, #8b5cf6);
    border-radius: 3px;
}

.tutorial-content pre::-webkit-scrollbar-thumb:hover,
.tutorial-content pre code::-webkit-scrollbar-thumb:hover {
    background: linear-gradient(90deg, #60a5fa, #a78bfa);
}

/* Syntax Highlighting - GitHub Dark Style */
.code-keyword { color: #ff7b72; font-weight: 500; }
.code-string { color: #a5d6ff; }
.code-number { color: #79c0ff; }
.code-comment { color: #8b949e; font-style: italic; }
.code-function { color: #d2a8ff; }
.code-operator { color: #ff7b72; }
.code-variable { color: #ffa657; }
.code-tag { color: #7ee787; }
.code-attr { color: #79c0ff; }
.code-property { color: #79c0ff; }
.code-value { color: #a5d6ff; }
.code-class { color: #ffa657; }
.code-punctuation { color: #c9d1d9; }
.code-built-in { color: #79c0ff; }

/* Inline Code */
.tutorial-content code:not(pre code),
code.inline {
    font-family: 'JetBrains Mono', 'Fira Code', var(--font-mono);
    font-size: 0.875em;
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.12), rgba(139, 92, 246, 0.08));
    color: #58a6ff;
    padding: 3px 8px;
    border-radius: 6px;
    font-weight: 500;
    border: 1px solid rgba(88, 166, 255, 0.15);
    backdrop-filter: blur(4px);
}

body.dark .tutorial-content code:not(pre code),
body.dark code.inline {
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.2), rgba(139, 92, 246, 0.15));
    color: #79c0ff;
    border-color: rgba(88, 166, 255, 0.2);
}

/* Dark Mode Code Block */
body.dark .tutorial-content pre,
body.dark pre.code-block {
    background: linear-gradient(180deg, #1a1f2e 0%, #0d1117 30px, #0d1117 100%);
    color: #c9d1d9;
}

body.dark .code-block-wrapper {
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.1), rgba(139, 92, 246, 0.1));
}

body.dark .code-block-wrapper:hover {
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.2), rgba(139, 92, 246, 0.15));
    box-shadow: 0 8px 32px rgba(59, 130, 246, 0.1);
}

/* ============================================================
   COLLAPSIBLE CONTENT (Accordion)
   ============================================================ */
.collapsible {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 20px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-light);
    border-radius: 10px;
    cursor: pointer;
    font-size: var(--text-sm);
    font-weight: 600;
    color: var(--text-primary);
    transition: all 0.25s ease;
    user-select: none;
    margin-bottom: 0;
}

.collapsible:hover {
    background: var(--bg-tertiary);
    border-color: var(--primary);
}

.collapsible::after {
    content: '';
    display: block;
    width: 8px;
    height: 8px;
    border-right: 2px solid var(--text-muted);
    border-bottom: 2px solid var(--text-muted);
    transform: rotate(45deg) translateY(-2px);
    transition: transform 0.25s ease;
    flex-shrink: 0;
}

.collapsible.open::after {
    transform: rotate(225deg) translateY(2px);
}

.collapsible-content {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.35s ease, padding 0.25s ease;
    padding: 0 20px;
    border: 1px solid transparent;
    border-top: none;
    border-radius: 0 0 10px 10px;
    background: var(--bg-secondary);
    margin-bottom: 0;
}

.collapsible-content.open {
    max-height: 1000px;
    padding: 20px;
    border-color: var(--border-light);
    border-top: none;
}

/* ============================================================
   BLOCKQUOTE / CITATION
   ============================================================ */
.tutorial-content blockquote,
blockquote.citation {
    margin: var(--sp-6) 0;
    padding: var(--sp-5) var(--sp-6);
    border-left: 4px solid var(--primary);
    background: var(--bg-secondary);
    border-radius: 0 var(--radius-md) var(--radius-md) 0;
    font-style: italic;
    color: var(--text-secondary);
}

.tutorial-content blockquote p,
blockquote.citation p {
    margin-bottom: var(--sp-2);
    line-height: 1.8;
}

.tutorial-content blockquote p:last-child,
blockquote.citation p:last-child {
    margin-bottom: 0;
}

.tutorial-content blockquote cite,
blockquote.citation cite {
    display: block;
    font-size: var(--text-sm);
    color: var(--text-muted);
    margin-top: var(--sp-3);
    font-style: normal;
    font-weight: 500;
}

.tutorial-content blockquote cite::before,
blockquote.citation cite::before {
    content: '— ';
}

/* Variant: Note style */
blockquote.note {
    border-left-color: var(--amber-500);
    background: var(--warning-bg);
}

/* Variant: Success style */
blockquote.success {
    border-left-color: var(--emerald-500);
    background: var(--emerald-100);
}

/* Variant: Warning style */
blockquote.warning {
    border-left-color: var(--red-500);
    background: var(--red-100);
}

body.dark blockquote.note {
    background: rgba(245, 158, 11, 0.1);
}

body.dark blockquote.success {
    background: rgba(16, 185, 129, 0.1);
}

body.dark blockquote.warning {
    background: rgba(239, 68, 68, 0.1);
}

/* ============================================================
   BACK TO TOP BUTTON
   ============================================================ */
.back-to-top {
    position: fixed;
    bottom: var(--sp-6);
    right: var(--sp-6);
    width: 52px;
    height: 52px;
    background: var(--primary);
    color: transparent;
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    line-height: 0.5;
    box-shadow: var(--shadow-md);
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: all var(--ease-slow);
    z-index: var(--z-sticky);
    border: none;
    cursor: pointer;
    padding: 0;
}

.back-to-top::after {
    content: '';
    display: block;
    width: 16px;
    height: 16px;
    border-right: 3px solid #fff;
    border-bottom: 3px solid #fff;
    transform: rotate(-135deg);
    margin: 0 auto;
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.back-to-top:hover {
    background: var(--primary-dark);
    box-shadow: var(--shadow-lg);
    transform: translateY(-3px);
}

/* ============================================================
   UTILITY CLASSES
   ============================================================ */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.mt-4 { margin-top: var(--sp-4); }
.mt-6 { margin-top: var(--sp-6); }
.mt-8 { margin-top: var(--sp-8); }
.mb-4 { margin-bottom: var(--sp-4); }
.mb-6 { margin-bottom: var(--sp-6); }
.mb-8 { margin-bottom: var(--sp-8); }

.hidden { display: none; }
.visible { display: block; }

/* Table Cell Helpers */
.cell-platform {
    display: flex;
    align-items: center;
    gap: var(--sp-3);
    line-height: 1.4;
}

.cell-platform__icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: var(--bg-tertiary);
    border-radius: var(--radius-md);
    font-size: 1.25rem;
    flex-shrink: 0;
}

.cell-platform__name {
    font-size: var(--text-sm);
    font-weight: 700;
    color: var(--text-primary);
    line-height: 1.3;
}

.cell-platform__sub {
    font-size: var(--text-xs);
    color: var(--text-muted);
    line-height: 1.3;
}

.cell-price {
    font-size: var(--text-sm);
    font-weight: 800;
    color: var(--primary);
    line-height: 1.3;
}

.cell-promo {
    font-size: var(--text-xs);
    color: var(--amber-600);
    font-weight: 600;
    line-height: 1.4;
}

.cell-note {
    font-size: var(--text-xs);
    color: var(--text-muted);
    font-style: italic;
    line-height: 1.4;
}

/* Row Highlight */
.row-highlight {
    background: linear-gradient(90deg, var(--primary-bg), transparent) !important;
}

.row-highlight:hover {
    background: linear-gradient(90deg, var(--primary-bg), var(--bg-secondary)) !important;
}

/* ============================================================
   ANIMATIONS
   ============================================================ */
@keyframes pulse {
    0%, 100% {
        box-shadow: 0 0 0 0 rgba(59, 130, 246, 0.4);
    }
    50% {
        box-shadow: 0 0 0 8px rgba(59, 130, 246, 0);
    }
}

.animate-pulse {
    animation: pulse 2s infinite;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

.animate-fadeIn {
    animation: fadeIn 0.4s ease-out;
}

/* ============================================================
   BLOG / TUTORIAL LAYOUT
   ============================================================ */
.tutorial-layout {
    position: relative;
    display: grid;
    grid-template-columns: minmax(0, 1fr) 300px;
    gap: var(--sp-10);
    align-items: start;
    min-height: calc(100vh - 200px);
}

.tutorial-content {
    max-width: 780px;
    width: 100%;
    overflow-x: hidden;
}

.tutorial-sidebar {
    position: sticky;
    top: 100px;
    height: fit-content;
    max-height: calc(100vh - 140px);
    overflow-y: auto;
}

/* Tutorial Header */
.tutorial-header {
    margin-bottom: var(--sp-10);
    padding-bottom: var(--sp-6);
    border-bottom: 1px solid var(--border-light);
}

.tutorial-header__breadcrumb {
    font-size: var(--text-sm);
    color: var(--text-muted);
    margin-bottom: var(--sp-4);
}

.tutorial-header__breadcrumb a {
    color: var(--primary);
    transition: color var(--ease-fast);
}

.tutorial-header__breadcrumb a:hover {
    color: var(--primary-dark);
    text-decoration: underline;
}

.tutorial-header h1 {
    font-size: var(--text-3xl);
    font-weight: 800;
    letter-spacing: var(--tracking-tight);
    line-height: 1.3;
    margin-bottom: var(--sp-4);
}

.tutorial-header__meta {
    display: flex;
    align-items: center;
    gap: var(--sp-6);
    font-size: var(--text-sm);
    color: var(--text-muted);
    flex-wrap: wrap;
}

.tutorial-header__meta-item {
    display: flex;
    align-items: center;
    gap: var(--sp-2);
}

/* Tutorial Steps */
.tutorial-step {
    margin-bottom: var(--sp-10);
    padding-bottom: var(--sp-8);
    border-bottom: 1px solid var(--border-light);
    scroll-margin-top: 80px;
}

.tutorial-step:last-child {
    border-bottom: none;
}

.tutorial-step__header {
    display: flex;
    align-items: center;
    gap: var(--sp-4);
    margin-bottom: var(--sp-5);
}

.tutorial-step__number {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, var(--blue-500), var(--violet-500));
    color: #fff;
    font-size: var(--text-lg);
    font-weight: 800;
    border-radius: var(--radius-full);
    flex-shrink: 0;
}

.tutorial-step__title {
    font-size: var(--text-xl);
    font-weight: 700;
    color: var(--text-primary);
    margin: 0;
    line-height: 1.3;
}

.tutorial-step__body {
    padding-left: 56px;
}

/* Tutorial Content Elements */
.tutorial-content p {
    font-size: var(--text-base);
    color: var(--text-secondary);
    line-height: 1.9;
    margin-bottom: var(--sp-5);
}

.tutorial-content h3 {
    font-size: var(--text-lg);
    font-weight: 700;
    color: var(--text-primary);
    margin: var(--sp-8) 0 var(--sp-4);
    line-height: 1.4;
}

.tutorial-content h4 {
    font-size: var(--text-base);
    font-weight: 700;
    color: var(--text-primary);
    margin: var(--sp-6) 0 var(--sp-3);
    line-height: 1.4;
}

.tutorial-content ul,
.tutorial-content ol {
    padding-left: var(--sp-6);
    margin-bottom: var(--sp-5);
}

.tutorial-content li {
    font-size: var(--text-base);
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: var(--sp-2);
}

.tutorial-content ul li {
    list-style: disc;
}

.tutorial-content ol li {
    list-style: decimal;
}

/* Info Boxes */
.tutorial-info {
    background: var(--primary-bg);
    border-left: 4px solid var(--primary);
    border-radius: 0 var(--radius-md) var(--radius-md) 0;
    padding: var(--sp-5) var(--sp-6);
    margin: var(--sp-6) 0;
}

.tutorial-info--warning {
    background: var(--warning-bg);
    border-left-color: var(--amber-500);
}

.tutorial-info--success {
    background: var(--emerald-100);
    border-left-color: var(--emerald-500);
}

.tutorial-info__title {
    font-size: var(--text-sm);
    font-weight: 700;
    margin-bottom: var(--sp-2);
    line-height: 1.4;
}

.tutorial-info p {
    font-size: var(--text-sm);
    line-height: 1.7;
    margin-bottom: var(--sp-2);
}

.tutorial-info p:last-child {
    margin-bottom: 0;
}

/* Promotion Banner within Tutorial */
.tutorial-promo {
    background: linear-gradient(135deg, var(--primary-bg), var(--violet-100));
    border: 1px solid var(--blue-100);
    border-radius: var(--radius-xl);
    padding: var(--sp-6) var(--sp-8);
    margin: var(--sp-8) 0;
    display: flex;
    align-items: center;
    gap: var(--sp-6);
}

.tutorial-promo__icon {
    font-size: 2rem;
    flex-shrink: 0;
}

.tutorial-promo__content {
    flex: 1;
}

.tutorial-promo__title {
    font-size: var(--text-base);
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--sp-2);
    line-height: 1.4;
}

.tutorial-promo__desc {
    font-size: var(--text-sm);
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: var(--sp-3);
}

body.dark .tutorial-info--warning {
    background: rgba(245, 158, 11, 0.1);
    border-left-color: var(--amber-500);
    color: #fbbf24;
}

body.dark .tutorial-info--success {
    background: rgba(16, 185, 129, 0.1);
    border-left-color: var(--emerald-500);
    color: #34d399;
}

body.dark .tutorial-info--warning .tutorial-info__title {
    color: #fbbf24;
}

body.dark .tutorial-info--success .tutorial-info__title {
    color: #34d399;
}

body.dark .tutorial-info {
    background: rgba(59, 130, 246, 0.1);
    border-left-color: var(--primary);
    color: #93c5fd;
}

body.dark .tutorial-info p {
    color: #93c5fd;
}

body.dark .tutorial-info .tutorial-info__title {
    color: #bfdbfe;
}

body.dark .tutorial-promo {
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.1), rgba(139, 92, 246, 0.1));
    border-color: rgba(59, 130, 246, 0.2);
}

/* Sidebar Navigation */
.sidebar-nav {
    background: var(--bg-base);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-xl);
    padding: var(--sp-6);
    box-shadow: var(--shadow-sm);
}

.sidebar-nav__title {
    font-size: var(--text-sm);
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--sp-4);
    padding-bottom: var(--sp-3);
    border-bottom: 1px solid var(--border-light);
}

.sidebar-nav__list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.sidebar-nav__item {
    margin-bottom: var(--sp-1);
}

.sidebar-nav__link {
    display: block;
    padding: var(--sp-2) var(--sp-3);
    font-size: var(--text-sm);
    color: var(--text-secondary);
    border-radius: var(--radius-md);
    transition: all var(--ease-fast);
    line-height: 1.4;
}

.sidebar-nav__link:hover {
    background: var(--bg-secondary);
    color: var(--text-primary);
}

.sidebar-nav__link.active {
    background: var(--primary-bg);
    color: var(--primary);
    font-weight: 600;
}

/* Sidebar TOC */
.sidebar-toc {
    background: var(--bg-base);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-xl);
    padding: var(--sp-4);
    box-shadow: var(--shadow-sm);
    margin-bottom: var(--sp-4);
}

.sidebar-toc__title {
    font-size: var(--text-sm);
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--sp-4);
    padding-bottom: var(--sp-3);
    border-bottom: 1px solid var(--border-light);
}

.sidebar-toc__list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.sidebar-toc__item {
    margin-bottom: var(--sp-2);
}

.sidebar-toc__link {
    display: block;
    font-size: var(--text-sm);
    color: var(--text-muted);
    padding: var(--sp-1) 0;
    transition: color var(--ease-fast);
    line-height: 1.4;
    border-left: 2px solid var(--border-light);
    padding-left: var(--sp-3);
}

.sidebar-toc__link:hover {
    color: var(--primary);
}

.sidebar-toc__link.active {
    color: var(--primary);
    font-weight: 600;
    border-left-color: var(--primary);
}

/* Tutorial Navigation (Prev/Next) */
.tutorial-nav {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--sp-6);
    margin-top: var(--sp-10);
    padding-top: var(--sp-8);
    border-top: 1px solid var(--border-light);
}

.tutorial-nav__item {
    display: flex;
    flex-direction: column;
    padding: var(--sp-5) var(--sp-6);
    background: var(--bg-base);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-lg);
    transition: all var(--ease-fast);
}

.tutorial-nav__item:hover {
    box-shadow: var(--shadow-md);
    border-color: var(--primary);
}

.tutorial-nav__label {
    font-size: var(--text-xs);
    color: var(--text-muted);
    margin-bottom: var(--sp-2);
    text-transform: uppercase;
    letter-spacing: var(--tracking-wide);
}

.tutorial-nav__title {
    font-size: var(--text-sm);
    font-weight: 600;
    color: var(--text-primary);
}

.tutorial-nav__item--next {
    text-align: right;
    align-items: flex-end;
}

/* Content Wrapper (Single Column Layout) */
.content-wrapper {
    max-width: 900px;
    margin: 0 auto;
}

.content-nav {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--sp-6);
    margin-top: var(--sp-10);
    padding-top: var(--sp-8);
    border-top: 1px solid var(--border-light);
}

.content-nav__item {
    display: flex;
}

.content-nav__link {
    display: flex;
    align-items: center;
    gap: var(--sp-4);
    padding: var(--sp-5) var(--sp-6);
    background: var(--bg-base);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-lg);
    transition: all var(--ease-fast);
    flex: 1;
}

.content-nav__link:hover {
    box-shadow: var(--shadow-md);
    border-color: var(--primary);
}

.content-nav__arrow {
    font-size: var(--text-xl);
    color: var(--primary);
    flex-shrink: 0;
}

.content-nav__content {
    display: flex;
    flex-direction: column;
    gap: var(--sp-1);
}

.content-nav__label {
    font-size: var(--text-xs);
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: var(--tracking-wide);
}

.content-nav__title {
    font-size: var(--text-sm);
    font-weight: 600;
    color: var(--text-primary);
}

.content-nav__item:last-child .content-nav__link {
    justify-content: flex-end;
    text-align: right;
}

/* Responsive */
@media (max-width: 1024px) {
    .tutorial-layout {
        grid-template-columns: 1fr;
    }

    .tutorial-sidebar {
        position: static;
    }
}

@media (max-width: 640px) {
    .tutorial-layout {
        min-height: auto;
    }

    .tutorial-content {
        overflow-x: hidden;
        max-width: 100%;
    }

    .tutorial-header h1 {
        font-size: var(--text-2xl);
    }

    .tutorial-step__body {
        padding-left: 0;
    }

    .tutorial-step__header {
        flex-wrap: wrap;
    }

    .tutorial-promo {
        flex-direction: column;
        text-align: center;
        padding: var(--sp-5);
    }

    .table-responsive {
        margin: 0 calc(var(--sp-4) * -1);
        padding: 0 var(--sp-4);
    }

    .tutorial-nav {
        grid-template-columns: 1fr;
    }

    .content-nav {
        grid-template-columns: 1fr;
    }

    .content-nav__link {
        padding: var(--sp-4);
    }
}