/* ========================================
   MCP Security Lab - Styles
   Dark theme default with light mode toggle
   ======================================== */

/* CSS Variables - Dark Theme (Default) - Evil Edition */
:root {
    /* Primary Colors - Blood Red */
    --color-primary: #dc2626;
    --color-primary-dark: #b91c1c;
    --color-primary-light: #ef4444;
    --color-primary-glow: rgba(220, 38, 38, 0.4);

    /* Status Colors */
    --color-success: #22c55e;
    --color-success-bg: rgba(34, 197, 94, 0.12);
    --color-success-border: #16a34a;

    --color-danger: #ef4444;
    --color-danger-bg: rgba(239, 68, 68, 0.15);
    --color-danger-border: #dc2626;

    --color-warning: #f59e0b;
    --color-warning-bg: rgba(245, 158, 11, 0.12);

    --color-info: #dc2626;
    --color-info-bg: rgba(220, 38, 38, 0.12);

    /* Background Colors - Pure Black */
    --color-bg: #000000;
    --color-bg-alt: #0a0a0a;
    --color-bg-elevated: #0f0f0f;
    --color-surface: #141414;
    --color-surface-hover: #1a1a1a;
    --color-border: #252525;
    --color-border-light: #333333;

    /* Text Colors */
    --color-text: #f5f5f5;
    --color-text-secondary: #a3a3a3;
    --color-text-muted: #737373;

    /* Code Colors */
    --color-code-bg: #0a0a0a;
    --color-code-text: #e5e5e5;
    --color-code-keyword: #ef4444;
    --color-code-string: #22c55e;
    --color-code-comment: #525252;
    --color-code-function: #f87171;
    --color-code-type: #fbbf24;
    --color-code-number: #fb923c;
    --color-code-regex: #f472b6;

    /* Navbar */
    --color-navbar: rgba(0, 0, 0, 0.95);
    --color-navbar-border: rgba(37, 37, 37, 0.8);

    /* Cards & Surfaces */
    --color-card-bg: linear-gradient(145deg, #141414 0%, #0f0f0f 100%);
    --color-card-border: #252525;
    --color-card-shadow: 0 4px 20px rgba(0, 0, 0, 0.6);

    /* Spacing */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;
    --space-3xl: 4rem;

    /* Typography */
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', 'Consolas', monospace;

    /* Borders */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;

    /* Shadows */
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.5);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.6);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.7);
    --shadow-xl: 0 16px 48px rgba(0, 0, 0, 0.8);
    --shadow-glow: 0 0 30px var(--color-primary-glow);

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-normal: 250ms ease;
    --transition-theme: 300ms ease;
}

/* Light Theme Variables */
[data-theme="light"] {
    --color-primary: #6366f1;
    --color-primary-dark: #4f46e5;
    --color-primary-light: #818cf8;
    --color-primary-glow: rgba(99, 102, 241, 0.2);

    --color-success: #10b981;
    --color-success-bg: #d1fae5;
    --color-success-border: #6ee7b7;

    --color-danger: #ef4444;
    --color-danger-bg: #fee2e2;
    --color-danger-border: #fca5a5;

    --color-warning: #f59e0b;
    --color-warning-bg: #fef3c7;

    --color-info: #3b82f6;
    --color-info-bg: #dbeafe;

    --color-bg: #f8fafc;
    --color-bg-alt: #f1f5f9;
    --color-bg-elevated: #ffffff;
    --color-surface: #ffffff;
    --color-surface-hover: #f8fafc;
    --color-border: #e2e8f0;
    --color-border-light: #cbd5e1;

    --color-text: #1e293b;
    --color-text-secondary: #64748b;
    --color-text-muted: #94a3b8;

    --color-code-bg: #1e293b;
    --color-code-text: #e2e8f0;

    --color-navbar: rgba(255, 255, 255, 0.95);
    --color-navbar-border: rgba(226, 232, 240, 0.8);

    --color-card-bg: #ffffff;
    --color-card-border: #e2e8f0;
    --color-card-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);

    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
    --shadow-glow: 0 0 20px var(--color-primary-glow);
}

/* Reset & Base */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
    overflow-x: hidden;
}

body {
    font-family: var(--font-sans);
    font-size: 16px;
    line-height: 1.6;
    color: var(--color-text);
    background-color: var(--color-bg);
    transition: background-color var(--transition-theme), color var(--transition-theme);
    overflow-x: hidden;
}

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

a:hover {
    color: var(--color-primary-light);
}

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

/* Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-lg);
}

/* ========================================
   Navigation
   ======================================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: var(--color-navbar);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--color-navbar-border);
    z-index: 1000;
    transition: background-color var(--transition-theme), border-color var(--transition-theme);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-lg);
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 64px;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-weight: 700;
    font-size: 1.125rem;
    color: var(--color-text);
}

.logo-icon {
    font-size: 1.5rem;
    color: #ef4444;
    text-shadow: 0 0 10px rgba(220, 38, 38, 0.6);
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: var(--space-xl);
}

.nav-menu a {
    color: var(--color-text-secondary);
    font-weight: 500;
    font-size: 0.875rem;
    transition: color var(--transition-fast);
}

.nav-menu a:hover {
    color: var(--color-primary);
}

.nav-right {
    display: flex;
    align-items: center;
    gap: var(--space-md);
}

/* Theme Toggle */
.theme-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    background: var(--color-surface);
    cursor: pointer;
    transition: all var(--transition-fast);
    color: var(--color-text);
    font-size: 1.25rem;
}

.theme-toggle:hover {
    background: var(--color-surface-hover);
    border-color: var(--color-primary);
    color: var(--color-primary);
}

.theme-toggle .icon-sun,
.theme-toggle .icon-moon {
    transition: opacity var(--transition-fast), transform var(--transition-fast);
}

/* Dark mode: show sun (to switch to light) */
.theme-toggle .icon-sun {
    display: block;
}

.theme-toggle .icon-moon {
    display: none;
}

/* Light mode: show moon (to switch to dark) */
[data-theme="light"] .theme-toggle .icon-sun {
    display: none;
}

[data-theme="light"] .theme-toggle .icon-moon {
    display: block;
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 4px;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--space-sm);
}

.nav-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--color-text);
    transition: transform var(--transition-fast);
}

/* Mobile Navigation */
@media (max-width: 768px) {
    .nav-toggle {
        display: flex;
    }

    .nav-menu {
        position: absolute;
        top: 64px;
        left: 0;
        right: 0;
        flex-direction: column;
        background: var(--color-surface);
        padding: var(--space-lg);
        gap: var(--space-md);
        border-bottom: 1px solid var(--color-border);
        display: none;
    }

    .nav-menu.active {
        display: flex;
    }
}

/* ========================================
   Hero Section
   ======================================== */
.hero {
    padding-top: calc(64px + var(--space-3xl));
    padding-bottom: var(--space-3xl);
    background: linear-gradient(135deg, #0a0a0a 0%, #000000 50%, #0f0f0f 100%);
    color: white;
    min-height: 80vh;
    display: flex;
    align-items: center;
    position: relative;
    overflow: hidden;
}

/* Animated background grid */
.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image:
        linear-gradient(rgba(220, 38, 38, 0.06) 1px, transparent 1px),
        linear-gradient(90deg, rgba(220, 38, 38, 0.06) 1px, transparent 1px);
    background-size: 50px 50px;
    pointer-events: none;
}

/* Glow effects */
.hero::after {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle at 30% 30%, rgba(220, 38, 38, 0.12) 0%, transparent 50%),
                radial-gradient(circle at 70% 70%, rgba(127, 29, 29, 0.1) 0%, transparent 50%);
    pointer-events: none;
}

[data-theme="light"] .hero {
    background: linear-gradient(135deg, #1f1f1f 0%, #0a0a0a 100%);
}

[data-theme="light"] .hero::before {
    background-image:
        linear-gradient(rgba(220, 38, 38, 0.08) 1px, transparent 1px),
        linear-gradient(90deg, rgba(220, 38, 38, 0.08) 1px, transparent 1px);
}

[data-theme="light"] .hero::after {
    background: radial-gradient(circle at 30% 30%, rgba(220, 38, 38, 0.15) 0%, transparent 50%);
}

.hero .container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-3xl);
    align-items: center;
    position: relative;
    z-index: 1;
}

.hero-content {
    min-width: 0;
}

.hero-badge {
    display: inline-block;
    background: rgba(220, 38, 38, 0.2);
    border: 1px solid rgba(220, 38, 38, 0.4);
    padding: var(--space-xs) var(--space-md);
    border-radius: 4px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: var(--space-lg);
    backdrop-filter: blur(4px);
    color: #ef4444;
}

.hero h1 {
    font-size: 4rem;
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: var(--space-lg);
    background: linear-gradient(135deg, #ffffff 0%, #ef4444 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-shadow: 0 0 60px rgba(220, 38, 38, 0.3);
}

[data-theme="light"] .hero h1 {
    background: linear-gradient(135deg, #ffffff 0%, #fca5a5 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.25rem;
    opacity: 0.9;
    margin-bottom: var(--space-xl);
    max-width: 500px;
    color: #cbd5e1;
}

[data-theme="light"] .hero-subtitle {
    color: rgba(255, 255, 255, 0.9);
}

.hero-stats {
    display: flex;
    gap: var(--space-xl);
    margin-bottom: var(--space-xl);
}

.stat {
    text-align: center;
}

.stat-number {
    display: block;
    font-size: 2.5rem;
    font-weight: 700;
    color: #ef4444;
}

[data-theme="light"] .stat-number {
    color: #fca5a5;
}

.stat-label {
    font-size: 0.875rem;
    opacity: 0.8;
}

.hero-cta {
    display: flex;
    gap: var(--space-md);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-sm) var(--space-lg);
    border-radius: var(--radius-md);
    font-weight: 600;
    font-size: 0.9375rem;
    cursor: pointer;
    transition: all var(--transition-fast);
    border: 2px solid transparent;
}

.btn-primary {
    background: var(--color-primary);
    color: white;
    box-shadow: 0 4px 14px rgba(220, 38, 38, 0.4);
    border-radius: var(--radius-sm);
}

.btn-primary:hover {
    background: var(--color-primary-light);
    color: white;
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(220, 38, 38, 0.6);
}

.btn-secondary {
    background: transparent;
    color: white;
    border-color: rgba(255, 255, 255, 0.3);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.5);
    color: white;
}

/* Hero Diagram */
.hero-visual {
    display: flex;
    justify-content: center;
    min-width: 0;
}

.architecture-preview {
    background: rgba(10, 10, 10, 0.8);
    border: 1px solid rgba(220, 38, 38, 0.3);
    border-radius: var(--radius-sm);
    padding: var(--space-lg);
    backdrop-filter: blur(10px);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.5), 0 0 40px rgba(220, 38, 38, 0.1);
    max-width: 100%;
    overflow: hidden;
}

[data-theme="light"] .architecture-preview {
    background: rgba(10, 10, 10, 0.9);
    border-color: rgba(220, 38, 38, 0.4);
}

.hero-diagram {
    width: 100%;
    max-width: 400px;
    height: auto;
    display: block;
}

.diagram-node {
    fill: rgba(20, 20, 20, 0.9);
    stroke: rgba(220, 38, 38, 0.5);
    stroke-width: 2;
}

.diagram-node.client {
    fill: rgba(220, 38, 38, 0.2);
    stroke: #dc2626;
}

.diagram-node.server {
    fill: rgba(239, 68, 68, 0.2);
    stroke: #ef4444;
}

.diagram-node.resource {
    fill: rgba(127, 29, 29, 0.3);
    stroke: #991b1b;
}

.diagram-label {
    fill: #f1f5f9;
    font-size: 14px;
    font-weight: 600;
    text-anchor: middle;
}

.diagram-sublabel {
    fill: #94a3b8;
    font-size: 11px;
    text-anchor: middle;
}

.diagram-label-sm {
    fill: #f1f5f9;
    font-size: 12px;
    font-weight: 500;
    text-anchor: middle;
}

.diagram-arrow {
    stroke: rgba(148, 163, 184, 0.6);
    stroke-width: 2;
    fill: none;
}

.diagram-arrow-head {
    fill: rgba(148, 163, 184, 0.6);
}

.danger-zone {
    stroke: #fbbf24;
    stroke-width: 2;
}

.danger-label {
    fill: #fbbf24;
    font-size: 12px;
    font-weight: 500;
    text-anchor: middle;
}

@media (max-width: 900px) {
    .hero .container {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .hero-content {
        order: 1;
    }

    .hero h1 {
        font-size: 2.5rem;
    }

    .hero-subtitle {
        margin-left: auto;
        margin-right: auto;
    }

    .hero-stats {
        justify-content: center;
        flex-wrap: wrap;
    }

    .hero-cta {
        justify-content: center;
        flex-wrap: wrap;
    }

    .hero-visual {
        order: 0;
    }
}

/* ========================================
   Sections
   ======================================== */
.section {
    padding: var(--space-3xl) 0;
    transition: background-color var(--transition-theme);
}

.section-alt {
    background: var(--color-bg-alt);
}

.section-header {
    text-align: center;
    margin-bottom: var(--space-3xl);
}

.section-header h2 {
    font-size: 2.25rem;
    font-weight: 700;
    margin-bottom: var(--space-md);
    color: var(--color-text);
}

.section-subtitle {
    font-size: 1.125rem;
    color: var(--color-text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

/* ========================================
   Info Cards (Overview Section)
   ======================================== */
.info-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-xl);
    margin-bottom: var(--space-3xl);
}

.info-card {
    background: var(--color-card-bg);
    border: 1px solid var(--color-card-border);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    box-shadow: var(--color-card-shadow);
    transition: transform var(--transition-normal), box-shadow var(--transition-normal), background-color var(--transition-theme), border-color var(--transition-theme);
}

.info-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg), var(--shadow-glow);
    border-color: var(--color-primary);
}

.info-icon {
    font-size: 2.5rem;
    margin-bottom: var(--space-md);
}

.info-card h3 {
    font-size: 1.25rem;
    margin-bottom: var(--space-sm);
    color: var(--color-text);
}

.info-card p {
    color: var(--color-text-secondary);
    font-size: 0.9375rem;
}

@media (max-width: 900px) {
    .info-grid {
        grid-template-columns: 1fr;
    }
}

/* Key Concept Box */
.key-concept {
    background: rgba(220, 38, 38, 0.08);
    border: 1px solid rgba(220, 38, 38, 0.25);
    border-left: 4px solid var(--color-primary);
    border-radius: var(--radius-sm);
    padding: var(--space-xl);
    transition: background-color var(--transition-theme), border-color var(--transition-theme);
    overflow-wrap: break-word;
    word-wrap: break-word;
}

.key-concept h3 {
    font-size: 1.125rem;
    margin-bottom: var(--space-md);
    color: var(--color-text);
}

.key-concept ul {
    margin-top: var(--space-md);
    padding-left: var(--space-xl);
}

.key-concept li {
    margin-bottom: var(--space-sm);
    color: var(--color-text-secondary);
}

.key-concept code {
    background: rgba(220, 38, 38, 0.15);
    padding: 2px 6px;
    border-radius: var(--radius-sm);
    font-family: var(--font-mono);
    font-size: 0.875em;
    color: #ef4444;
    word-break: break-word;
}

/* ========================================
   Threat Model Section
   ======================================== */
.threat-diagram {
    margin-bottom: var(--space-3xl);
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}

.full-diagram {
    width: 100%;
    max-width: 900px;
    min-width: 600px;
    margin: 0 auto;
    display: block;
    height: auto;
}

/* Zone backgrounds */
.zone {
    stroke-width: 2;
    transition: fill var(--transition-theme), stroke var(--transition-theme);
}

.zone-user {
    fill: rgba(52, 211, 153, 0.1);
    stroke: rgba(52, 211, 153, 0.4);
}

.zone-ai {
    fill: rgba(96, 165, 250, 0.1);
    stroke: rgba(96, 165, 250, 0.4);
}

.zone-mcp {
    fill: rgba(251, 191, 36, 0.1);
    stroke: rgba(251, 191, 36, 0.4);
}

[data-theme="light"] .zone-user {
    fill: #f0fdf4;
    stroke: #86efac;
}

[data-theme="light"] .zone-ai {
    fill: #eff6ff;
    stroke: #93c5fd;
}

[data-theme="light"] .zone-mcp {
    fill: #fef3c7;
    stroke: #fcd34d;
}

.zone-title {
    font-size: 14px;
    font-weight: 600;
    fill: var(--color-text);
    text-anchor: middle;
}

/* Components */
.component {
    fill: var(--color-surface);
    stroke: var(--color-border);
    stroke-width: 2;
    transition: fill var(--transition-theme), stroke var(--transition-theme);
}

.component-danger {
    fill: rgba(248, 113, 113, 0.2);
    stroke: #f87171;
}

.component-ai {
    fill: rgba(96, 165, 250, 0.2);
    stroke: #60a5fa;
}

.component-mcp {
    fill: rgba(251, 191, 36, 0.2);
    stroke: #f59e0b;
}

.component-tool {
    fill: rgba(250, 204, 21, 0.2);
    stroke: #facc15;
}

.component-resource {
    fill: rgba(244, 114, 182, 0.2);
    stroke: #f472b6;
}

[data-theme="light"] .component {
    fill: var(--color-surface);
    stroke: var(--color-border);
}

[data-theme="light"] .component-danger {
    fill: #fee2e2;
    stroke: #f87171;
}

[data-theme="light"] .component-ai {
    fill: #dbeafe;
    stroke: #60a5fa;
}

[data-theme="light"] .component-mcp {
    fill: #fef3c7;
    stroke: #f59e0b;
}

[data-theme="light"] .component-tool {
    fill: #fef9c3;
    stroke: #facc15;
}

[data-theme="light"] .component-resource {
    fill: #fce7f3;
    stroke: #f472b6;
}

.component-label {
    font-size: 13px;
    font-weight: 600;
    fill: var(--color-text);
    text-anchor: middle;
}

.component-label-sm {
    font-size: 12px;
    font-weight: 500;
    fill: var(--color-text);
    text-anchor: middle;
}

.component-sublabel {
    font-size: 10px;
    fill: var(--color-text-secondary);
    text-anchor: middle;
}

/* Arrows */
.flow-arrow {
    stroke: var(--color-text-muted);
    stroke-width: 2;
    fill: none;
}

.attack-arrow {
    stroke: var(--color-danger);
    stroke-width: 2;
    stroke-dasharray: 5, 3;
    fill: none;
}

/* Attack Types Grid */
.attack-types h3 {
    font-size: 1.5rem;
    margin-bottom: var(--space-xl);
    text-align: center;
}

.attack-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-lg);
}

.attack-card {
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--color-border);
    position: relative;
    transition: background-color var(--transition-theme), border-color var(--transition-theme);
}

.attack-card:hover {
    border-color: var(--color-danger);
}

.attack-number {
    position: absolute;
    top: -12px;
    left: var(--space-lg);
    background: var(--color-danger);
    color: white;
    width: 28px;
    height: 28px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 0.875rem;
    box-shadow: 0 2px 8px rgba(220, 38, 38, 0.5);
}

.attack-card h4 {
    font-size: 1.125rem;
    margin-bottom: var(--space-sm);
    color: var(--color-text);
}

.attack-card p {
    color: var(--color-text-secondary);
    font-size: 0.9375rem;
    margin-bottom: var(--space-md);
}

.attack-example {
    background: var(--color-bg-alt);
    padding: var(--space-md);
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    border: 1px solid var(--color-border);
    overflow-wrap: break-word;
    word-wrap: break-word;
}

.attack-example code {
    word-break: break-word;
}

.attack-example strong {
    color: var(--color-text);
}

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

/* ========================================
   Vulnerability Tabs
   ======================================== */
.vuln-tabs {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-sm);
    margin-bottom: var(--space-xl);
    justify-content: center;
}

.vuln-tab {
    padding: var(--space-sm) var(--space-lg);
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    font-weight: 500;
    font-size: 0.875rem;
    cursor: pointer;
    transition: all var(--transition-fast);
    color: var(--color-text-secondary);
}

.vuln-tab:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
}

.vuln-tab.active {
    background: var(--color-primary);
    border-color: var(--color-primary);
    color: white;
    box-shadow: 0 4px 12px rgba(220, 38, 38, 0.4);
}

/* Vulnerability Content */
.vuln-content {
    display: none;
}

.vuln-content.active {
    display: block;
}

.vuln-header {
    margin-bottom: var(--space-xl);
}

.vuln-severity {
    display: inline-block;
    padding: var(--space-xs) var(--space-md);
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: var(--space-md);
}

.vuln-severity.critical {
    background: linear-gradient(135deg, #991b1b 0%, #7f1d1d 100%);
    color: white;
    box-shadow: 0 2px 8px rgba(153, 27, 27, 0.4);
}

.vuln-severity.high {
    background: linear-gradient(135deg, #ef4444 0%, #dc2626 100%);
    color: white;
    box-shadow: 0 2px 8px rgba(239, 68, 68, 0.4);
}

.vuln-severity.medium {
    background: linear-gradient(135deg, #f59e0b 0%, #d97706 100%);
    color: white;
    box-shadow: 0 2px 8px rgba(245, 158, 11, 0.4);
}

.vuln-header h3 {
    font-size: 1.5rem;
    margin-bottom: var(--space-sm);
}

.vuln-header p {
    color: var(--color-text-secondary);
}

/* Code Comparison */
.code-comparison {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-lg);
    margin-bottom: var(--space-xl);
    max-width: 100%;
    overflow: hidden;
}

.code-panel {
    background: var(--color-code-bg);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    min-width: 0;
}

.code-panel.vulnerable {
    border: 2px solid var(--color-danger);
    box-shadow: var(--shadow-md), 0 0 25px rgba(220, 38, 38, 0.2);
}

.code-panel.secure {
    border: 2px solid var(--color-success);
    box-shadow: var(--shadow-md), 0 0 25px rgba(34, 197, 94, 0.15);
}

.code-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--space-sm) var(--space-md);
    background: rgba(0, 0, 0, 0.4);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.code-badge {
    font-size: 0.75rem;
    font-weight: 600;
    padding: var(--space-xs) var(--space-sm);
    border-radius: var(--radius-sm);
}

.code-badge.danger {
    background: var(--color-danger);
    color: white;
}

.code-badge.success {
    background: var(--color-success);
    color: white;
}

.copy-btn {
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    color: var(--color-code-text);
    padding: var(--space-xs) var(--space-sm);
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.copy-btn:hover {
    background: rgba(255, 255, 255, 0.2);
    border-color: rgba(255, 255, 255, 0.3);
}

.code-panel pre {
    padding: var(--space-lg);
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    margin: 0;
    max-width: 100%;
}

.code-panel code {
    font-family: var(--font-mono);
    font-size: 0.8125rem;
    line-height: 1.7;
    color: var(--color-code-text);
    word-break: break-word;
}

/* Syntax Highlighting */
.code-panel .keyword {
    color: var(--color-code-keyword);
}

.code-panel .string {
    color: var(--color-code-string);
}

.code-panel .comment {
    color: var(--color-code-comment);
    font-style: italic;
}

.code-panel .function {
    color: var(--color-code-function);
}

.code-panel .type {
    color: var(--color-code-type);
}

.code-panel .number {
    color: var(--color-code-number);
}

.code-panel .regex {
    color: var(--color-code-regex);
}

@media (max-width: 900px) {
    .code-comparison {
        grid-template-columns: 1fr;
    }
}

/* Vulnerability Details */
.vuln-details {
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    border: 1px solid var(--color-border);
    transition: background-color var(--transition-theme), border-color var(--transition-theme);
}

.vuln-details h4 {
    font-size: 1.125rem;
    margin-bottom: var(--space-md);
}

.vuln-details ul {
    list-style: none;
}

.vuln-details li {
    padding: var(--space-sm) 0;
    border-bottom: 1px solid var(--color-border);
}

.vuln-details li:last-child {
    border-bottom: none;
}

.vuln-details code {
    background: var(--color-bg-alt);
    padding: 2px 6px;
    border-radius: var(--radius-sm);
    font-family: var(--font-mono);
    font-size: 0.875em;
    color: var(--color-primary);
}

.warning-box {
    margin-top: var(--space-lg);
    background: var(--color-warning-bg);
    border: 1px solid rgba(251, 191, 36, 0.3);
    border-left: 4px solid var(--color-warning);
    padding: var(--space-md);
    border-radius: var(--radius-sm);
    font-size: 0.9375rem;
}

/* ========================================
   Attack Flow Diagrams
   ======================================== */
.flow-selector {
    display: flex;
    gap: var(--space-md);
    justify-content: center;
    margin-bottom: var(--space-xl);
    flex-wrap: wrap;
}

.flow-btn {
    padding: var(--space-sm) var(--space-lg);
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
    color: var(--color-text-secondary);
}

.flow-btn:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
}

.flow-btn.active {
    background: var(--color-primary);
    border-color: var(--color-primary);
    color: white;
    box-shadow: 0 4px 12px rgba(220, 38, 38, 0.4);
}

.attack-flow {
    display: none;
}

.attack-flow.active {
    display: block;
}

.flow-title {
    text-align: center;
    margin-bottom: var(--space-xl);
}

.flow-title h3 {
    font-size: 1.5rem;
    margin-bottom: var(--space-sm);
}

.flow-title p {
    color: var(--color-text-secondary);
}

.flow-diagram {
    max-width: 600px;
    margin: 0 auto var(--space-xl);
    width: 100%;
}

.flow-step {
    display: flex;
    gap: var(--space-lg);
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
    border: 1px solid var(--color-border);
    margin-bottom: var(--space-sm);
    transition: background-color var(--transition-theme), border-color var(--transition-theme);
    min-width: 0;
    overflow: hidden;
}

.flow-step.step-vulnerable {
    border-color: var(--color-danger);
    background: var(--color-danger-bg);
}

.flow-step.step-impact {
    border-color: #991b1b;
    background: linear-gradient(135deg, #450a0a 0%, #7f1d1d 100%);
    color: white;
}

.flow-step.step-impact .step-actor,
.flow-step.step-impact .step-action,
.flow-step.step-impact .step-detail {
    color: white;
}

.step-number {
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    flex-shrink: 0;
    box-shadow: 0 2px 8px rgba(220, 38, 38, 0.5);
}

.flow-step.step-impact .step-number {
    background: linear-gradient(135deg, #ef4444 0%, #dc2626 100%);
    box-shadow: 0 2px 8px rgba(239, 68, 68, 0.4);
}

.step-content {
    flex: 1;
    min-width: 0;
    overflow-wrap: break-word;
    word-wrap: break-word;
}

.step-actor {
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: var(--space-xs);
}

.step-actor.attacker {
    color: var(--color-danger);
}

.step-actor.user {
    color: var(--color-info);
}

.step-actor.ai {
    color: var(--color-primary);
}

.step-actor.mcp {
    color: var(--color-warning);
}

.step-actor.impact {
    color: inherit;
}

.step-action {
    font-weight: 600;
    margin-bottom: var(--space-sm);
    overflow-wrap: break-word;
    word-wrap: break-word;
}

.step-detail {
    color: var(--color-text-secondary);
    font-size: 0.9375rem;
    overflow-wrap: break-word;
    word-wrap: break-word;
}

.step-detail pre {
    background: var(--color-code-bg);
    color: var(--color-code-text);
    padding: var(--space-sm);
    border-radius: var(--radius-sm);
    margin-top: var(--space-sm);
    font-family: var(--font-mono);
    font-size: 0.8125rem;
    white-space: pre-wrap;
    word-wrap: break-word;
    overflow-wrap: break-word;
    border: 1px solid rgba(255, 255, 255, 0.1);
    max-width: 100%;
}

.flow-arrow {
    text-align: center;
    font-size: 1.5rem;
    color: var(--color-text-muted);
    margin: var(--space-xs) 0;
}

.flow-defense {
    background: var(--color-success-bg);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    border: 1px solid rgba(52, 211, 153, 0.3);
    border-left: 4px solid var(--color-success);
}

.flow-defense h4 {
    margin-bottom: var(--space-md);
    color: var(--color-success);
}

.flow-defense ul {
    list-style: none;
}

.flow-defense li {
    padding: var(--space-sm) 0;
    color: var(--color-text-secondary);
}

/* ========================================
   Best Practices Section
   ======================================== */
.practices-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-xl);
    margin-bottom: var(--space-3xl);
}

.practice-category {
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--color-border);
    transition: background-color var(--transition-theme), border-color var(--transition-theme);
}

.practice-category:hover {
    border-color: var(--color-primary);
}

.practice-category h3 {
    font-size: 1.125rem;
    margin-bottom: var(--space-lg);
    padding-bottom: var(--space-md);
    border-bottom: 2px solid var(--color-border);
}

.checklist {
    list-style: none;
}

.checklist li {
    display: flex;
    align-items: flex-start;
    gap: var(--space-sm);
    padding: var(--space-sm) 0;
    font-size: 0.9375rem;
}

.checklist input[type="checkbox"] {
    margin-top: 4px;
    width: 18px;
    height: 18px;
    cursor: pointer;
    accent-color: var(--color-success);
}

.checklist label {
    cursor: pointer;
    color: var(--color-text-secondary);
    transition: color var(--transition-fast);
}

.checklist input:checked + label {
    color: var(--color-success);
    text-decoration: line-through;
}

@media (max-width: 900px) {
    .practices-grid {
        grid-template-columns: 1fr;
    }
}

/* Architecture Diagram */
.architecture-best-practice {
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    box-shadow: var(--shadow-md);
    border: 1px solid var(--color-border);
    transition: background-color var(--transition-theme), border-color var(--transition-theme);
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}

.architecture-best-practice h3 {
    text-align: center;
    margin-bottom: var(--space-xl);
}

.architecture-diagram {
    width: 100%;
    max-width: 800px;
    min-width: 500px;
    margin: 0 auto;
    display: block;
    height: auto;
}

.arch-client {
    fill: rgba(96, 165, 250, 0.2);
    stroke: #3b82f6;
    stroke-width: 2;
}

.arch-layer {
    stroke-width: 2;
}

.layer-auth {
    fill: rgba(236, 72, 153, 0.2);
    stroke: #ec4899;
}

.layer-validate {
    fill: rgba(16, 185, 129, 0.2);
    stroke: #10b981;
}

.layer-logic {
    fill: rgba(99, 102, 241, 0.2);
    stroke: #6366f1;
}

.layer-logging {
    fill: rgba(245, 158, 11, 0.2);
    stroke: #f59e0b;
}

[data-theme="light"] .arch-client {
    fill: #dbeafe;
}

[data-theme="light"] .layer-auth {
    fill: #fce7f3;
}

[data-theme="light"] .layer-validate {
    fill: #d1fae5;
}

[data-theme="light"] .layer-logic {
    fill: #e0e7ff;
}

[data-theme="light"] .layer-logging {
    fill: #fef3c7;
}

.arch-resource {
    fill: var(--color-bg-alt);
    stroke: var(--color-text-muted);
    stroke-width: 2;
}

.arch-label {
    font-size: 14px;
    font-weight: 600;
    fill: var(--color-text);
    text-anchor: middle;
}

.arch-sublabel {
    font-size: 11px;
    fill: var(--color-text-secondary);
    text-anchor: middle;
}

.arch-arrow {
    stroke: var(--color-text-muted);
    stroke-width: 2;
    fill: none;
}

.arch-arrow-light {
    stroke: var(--color-border);
    stroke-width: 1;
    stroke-dasharray: 4, 2;
    fill: none;
}

/* ========================================
   Quiz Section
   ======================================== */
.quiz-container {
    max-width: 700px;
    margin: 0 auto;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    padding: var(--space-2xl);
    box-shadow: var(--shadow-lg);
    transition: background-color var(--transition-theme), border-color var(--transition-theme);
}

.quiz-progress {
    margin-bottom: var(--space-xl);
}

.progress-bar {
    height: 8px;
    background: var(--color-bg-alt);
    border-radius: 4px;
    overflow: hidden;
    margin-bottom: var(--space-sm);
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, #b91c1c 0%, #ef4444 100%);
    width: 12.5%;
    transition: width var(--transition-normal);
    box-shadow: 0 0 15px rgba(220, 38, 38, 0.5);
}

.progress-text {
    font-size: 0.875rem;
    color: var(--color-text-secondary);
}

.quiz-question {
    display: none;
}

.quiz-question.active {
    display: block;
}

.quiz-question h3 {
    font-size: 1.25rem;
    margin-bottom: var(--space-xl);
    line-height: 1.5;
}

.quiz-options {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
    margin-bottom: var(--space-xl);
}

.quiz-option {
    display: flex;
    align-items: flex-start;
    gap: var(--space-md);
    padding: var(--space-md);
    background: var(--color-bg-alt);
    border: 2px solid var(--color-border);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.quiz-option:hover {
    border-color: var(--color-primary);
    background: var(--color-surface-hover);
}

.quiz-option input {
    margin-top: 4px;
    width: 20px;
    height: 20px;
    cursor: pointer;
    accent-color: var(--color-primary);
}

.quiz-option.correct {
    border-color: var(--color-success);
    background: var(--color-success-bg);
}

.quiz-option.incorrect {
    border-color: var(--color-danger);
    background: var(--color-danger-bg);
}

.option-text {
    flex: 1;
    font-size: 0.9375rem;
}

.option-text code {
    background: var(--color-code-bg);
    color: var(--color-code-text);
    padding: 2px 6px;
    border-radius: var(--radius-sm);
    font-family: var(--font-mono);
    font-size: 0.875em;
}

.quiz-feedback {
    padding: var(--space-md);
    border-radius: var(--radius-md);
    margin-bottom: var(--space-lg);
    display: none;
}

.quiz-feedback.show {
    display: block;
}

.quiz-feedback.correct {
    background: var(--color-success-bg);
    border: 1px solid var(--color-success-border);
    color: var(--color-success);
}

.quiz-feedback.incorrect {
    background: var(--color-danger-bg);
    border: 1px solid var(--color-danger-border);
    color: var(--color-danger);
}

.quiz-nav {
    display: flex;
    justify-content: space-between;
    gap: var(--space-md);
}

.quiz-nav .btn {
    min-width: 140px;
}

.quiz-nav .btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* Quiz Results */
.quiz-results {
    display: none;
    text-align: center;
}

.quiz-results.show {
    display: block;
}

.quiz-results h3 {
    font-size: 1.5rem;
    margin-bottom: var(--space-lg);
}

.results-score {
    font-size: 4rem;
    font-weight: 700;
    margin-bottom: var(--space-lg);
}

.score-number {
    color: var(--color-primary);
}

.score-total {
    color: var(--color-text-muted);
}

.results-message {
    font-size: 1.125rem;
    color: var(--color-text-secondary);
    margin-bottom: var(--space-xl);
}

/* ========================================
   Footer
   ======================================== */
.footer {
    background: var(--color-code-bg);
    color: var(--color-code-text);
    padding: var(--space-3xl) 0 var(--space-xl);
    border-top: 1px solid var(--color-border);
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-3xl);
    margin-bottom: var(--space-2xl);
}

.footer-section h4 {
    font-size: 1rem;
    margin-bottom: var(--space-md);
    color: var(--color-text);
}

.footer-section p {
    font-size: 0.875rem;
    color: var(--color-text-muted);
    line-height: 1.6;
}

.footer-section ul {
    list-style: none;
}

.footer-section li {
    margin-bottom: var(--space-sm);
}

.footer-section a {
    color: var(--color-text-muted);
    font-size: 0.875rem;
    transition: color var(--transition-fast);
}

.footer-section a:hover {
    color: var(--color-primary);
}

.footer-bottom {
    text-align: center;
    padding-top: var(--space-xl);
    border-top: 1px solid var(--color-border);
}

.footer-bottom p {
    font-size: 0.875rem;
    color: var(--color-text-muted);
}

@media (max-width: 768px) {
    .footer-content {
        grid-template-columns: 1fr;
        gap: var(--space-xl);
    }
}

/* ========================================
   Small Phone Breakpoint (480px and below)
   ======================================== */
@media (max-width: 480px) {
    /* Container padding adjustment */
    .container {
        padding: 0 var(--space-md);
    }

    /* Hero adjustments */
    .hero {
        min-height: auto;
        padding-top: calc(64px + var(--space-xl));
        padding-bottom: var(--space-xl);
    }

    .hero h1 {
        font-size: 1.75rem;
    }

    .hero-subtitle {
        font-size: 1rem;
    }

    .hero-stats {
        flex-direction: column;
        gap: var(--space-md);
    }

    .stat-number {
        font-size: 2rem;
    }

    .hero-cta {
        flex-direction: column;
        width: 100%;
    }

    .hero-cta .btn {
        width: 100%;
        text-align: center;
    }

    .architecture-preview {
        padding: var(--space-md);
    }

    /* Section headers */
    .section-header h2 {
        font-size: 1.5rem;
    }

    .section-subtitle {
        font-size: 1rem;
    }

    /* Info cards */
    .info-card {
        padding: var(--space-md);
    }

    .info-icon {
        font-size: 2rem;
    }

    /* Attack cards */
    .attack-card {
        padding: var(--space-md);
    }

    /* Vulnerability tabs */
    .vuln-tabs {
        gap: var(--space-xs);
    }

    .vuln-tab {
        padding: var(--space-xs) var(--space-sm);
        font-size: 0.75rem;
    }

    .vuln-header h3 {
        font-size: 1.25rem;
    }

    /* Code panels */
    .code-panel code {
        font-size: 0.6875rem;
    }

    .code-header {
        flex-wrap: wrap;
        gap: var(--space-xs);
    }

    /* Flow diagrams */
    .flow-selector {
        gap: var(--space-xs);
    }

    .flow-btn {
        padding: var(--space-xs) var(--space-sm);
        font-size: 0.75rem;
    }

    .flow-step {
        padding: var(--space-md);
        gap: var(--space-md);
    }

    .step-number {
        width: 32px;
        height: 32px;
        font-size: 0.875rem;
    }

    .step-detail pre {
        font-size: 0.6875rem;
    }

    /* Practices grid */
    .practice-category {
        padding: var(--space-md);
    }

    .checklist li {
        font-size: 0.875rem;
    }

    /* Quiz */
    .quiz-container {
        padding: var(--space-lg);
    }

    .quiz-question h3 {
        font-size: 1rem;
    }

    .quiz-option {
        padding: var(--space-sm);
    }

    .option-text {
        font-size: 0.875rem;
    }

    .quiz-nav {
        flex-direction: column;
    }

    .quiz-nav .btn {
        width: 100%;
    }

    .results-score {
        font-size: 3rem;
    }

    /* Full diagram (threat model) */
    .full-diagram {
        min-width: 480px;
    }

    /* Architecture diagram */
    .architecture-diagram {
        min-width: 400px;
    }
}

/* ========================================
   Very Small Phones (360px and below)
   ======================================== */
@media (max-width: 360px) {
    .hero h1 {
        font-size: 1.5rem;
    }

    .hero-badge {
        font-size: 0.625rem;
    }

    .vuln-tab {
        padding: var(--space-xs);
        font-size: 0.625rem;
    }

    .flow-btn {
        font-size: 0.625rem;
    }
}

/* ========================================
   Animations
   ======================================== */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes pulse {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.7;
    }
}

@keyframes glow {
    0%, 100% {
        box-shadow: 0 0 5px var(--color-primary-glow);
    }
    50% {
        box-shadow: 0 0 20px var(--color-primary-glow);
    }
}

.fade-in {
    animation: fadeIn 0.5s ease forwards;
}

/* Scroll animations */
.animate-on-scroll {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.animate-on-scroll.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ========================================
   Scrollbar Styling (Dark Theme)
   ======================================== */
::-webkit-scrollbar {
    width: 10px;
    height: 10px;
}

::-webkit-scrollbar-track {
    background: var(--color-bg);
}

::-webkit-scrollbar-thumb {
    background: var(--color-border);
    border-radius: 5px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--color-border-light);
}

/* Firefox */
* {
    scrollbar-width: thin;
    scrollbar-color: var(--color-border) var(--color-bg);
}