/* ========================================
   RAG System Website - Premium Styles
   ======================================== */

/* ===== CSS Variables & Design Tokens ===== */
:root {
    /* Color Palette - Dark Mode Premium ( mechanical / cyan theme ) */
    --color-bg-primary: #0a0f1c;
    --color-bg-secondary: #111827;
    --color-bg-tertiary: #1e293b;
    --color-bg-card: rgba(30, 41, 59, 0.7);
    --color-bg-glass: rgba(255, 255, 255, 0.05);

    /* Accent Colors - Cyan / Electric Blue */
    --color-accent-primary: #0ea5e9;
    /* Sky 500 */
    --color-accent-secondary: #06b6d4;
    /* Cyan 500 */
    --color-accent-gradient: linear-gradient(135deg, #0ea5e9 0%, #06b6d4 50%, #22d3ee 100%);
    --color-accent-soft: rgba(6, 182, 212, 0.15);

    /* Status Colors */
    --color-success: #10b981;
    --color-warning: #f59e0b;
    --color-info: #3b82f6;
    --color-danger: #ef4444;

    /* Text Colors */
    --color-text-primary: #f8fafc;
    --color-text-secondary: #e2e8f0;
    --color-text-muted: #cbd5e1;

    /* Borders & Effects */
    --color-border: rgba(255, 255, 255, 0.08);
    --color-border-hover: rgba(6, 182, 212, 0.5);
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 40px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 0 40px rgba(6, 182, 212, 0.3);

    /* Typography */
    --font-primary: 'Inter', 'Pretendard', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', monospace;

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

    /* Border Radius */
    --radius-sm: 6px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-xl: 28px;
    --radius-full: 9999px;

    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-base: 0.3s ease;
    --transition-slow: 0.5s ease;
}

/* ===== AI Pattern Canvas Background ===== */
.ai-canvas-container {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -2;
    pointer-events: none;
}

#ai-pattern-canvas {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0.6;
}

/* Enhanced glow effects */
.glow-text {
    text-shadow:
        0 0 10px rgba(6, 182, 212, 0.5),
        0 0 20px rgba(6, 182, 212, 0.3),
        0 0 40px rgba(6, 182, 212, 0.2);
}

.glow-border {
    box-shadow:
        0 0 20px rgba(6, 182, 212, 0.3),
        inset 0 0 20px rgba(6, 182, 212, 0.1);
}

.glow-line {
    position: relative;
}

.glow-line::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--color-accent-gradient);
    box-shadow: 0 0 20px rgba(6, 182, 212, 0.8);
}

/* Circuit pattern overlay */
.circuit-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    pointer-events: none;
    background-image:
        radial-gradient(circle at 20% 30%, rgba(6, 182, 212, 0.08) 0%, transparent 25%),
        radial-gradient(circle at 80% 70%, rgba(14, 165, 233, 0.06) 0%, transparent 25%),
        radial-gradient(circle at 50% 50%, rgba(59, 130, 246, 0.04) 0%, transparent 30%);
    animation: circuitPulse 8s ease-in-out infinite;
}

@keyframes circuitPulse {

    0%,
    100% {
        opacity: 0.6;
    }

    50% {
        opacity: 1;
    }
}

/* Glowing card hover effect */
.card:hover .card-icon,
.tech-card:hover .tech-icon {
    box-shadow:
        0 0 30px rgba(6, 182, 212, 0.5),
        0 0 60px rgba(6, 182, 212, 0.3);
}

/* Animated border gradient */
.animated-border {
    position: relative;
    overflow: hidden;
}

.animated-border::before {
    content: '';
    position: absolute;
    top: -2px;
    left: -2px;
    right: -2px;
    bottom: -2px;
    background: linear-gradient(45deg, #0ea5e9, #06b6d4, #22d3ee, #0ea5e9);
    background-size: 400% 400%;
    z-index: -1;
    animation: gradientBorder 3s ease infinite;
    border-radius: inherit;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.animated-border:hover::before {
    opacity: 1;
}

@keyframes gradientBorder {
    0% {
        background-position: 0% 50%;
    }

    50% {
        background-position: 100% 50%;
    }

    100% {
        background-position: 0% 50%;
    }
}

/* Cyber grid pattern */
.cyber-grid {
    background-image:
        linear-gradient(rgba(6, 182, 212, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(6, 182, 212, 0.03) 1px, transparent 1px);
    background-size: 50px 50px;
}

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
    scroll-padding-top: 100px;
}

body {
    font-family: var(--font-primary);
    background: var(--color-bg-primary);
    color: var(--color-text-primary);
    line-height: 1.7;
    min-height: 100vh;
    overflow-x: hidden;
    word-break: keep-all;
    overflow-wrap: break-word;
}

/* Background Animation */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background:
        radial-gradient(ellipse 80% 50% at 20% 40%, rgba(6, 182, 212, 0.15) 0%, transparent 50%),
        radial-gradient(ellipse 60% 40% at 80% 60%, rgba(14, 165, 233, 0.12) 0%, transparent 50%),
        radial-gradient(ellipse 50% 30% at 50% 80%, rgba(59, 130, 246, 0.08) 0%, transparent 50%);
    pointer-events: none;
    z-index: -1;
}

/* ===== Typography ===== */
h1,
h2,
h3,
h4,
h5,
h6 {
    font-weight: 700;
    line-height: 1.3;
    letter-spacing: -0.02em;
    word-break: keep-all;
}

h1 {
    font-size: clamp(2.5rem, 5vw, 4rem);
}

h2 {
    font-size: clamp(1.75rem, 3.5vw, 2.5rem);
}

h3 {
    font-size: clamp(1.25rem, 2.5vw, 1.75rem);
}

h4 {
    font-size: 1.25rem;
}

p {
    color: var(--color-text-secondary);
    font-size: 1rem;
    word-break: keep-all;
}

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

a:hover {
    color: var(--color-accent-secondary);
}

/* ===== Container ===== */
.container {
    width: 100%;
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

.section {
    padding: var(--spacing-3xl) 0;
}

/* ===== Navigation ===== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(10, 15, 28, 0.8);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--color-border);
    padding: var(--spacing-md) 0;
    transition: var(--transition-base);
}

.navbar.scrolled {
    background: rgba(10, 15, 28, 0.95);
    box-shadow: var(--shadow-md);
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 1.5rem;
    font-weight: 800;
    background: var(--color-accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.logo-icon {
    width: 40px;
    height: 40px;
    background: var(--color-accent-gradient);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.2rem;
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: var(--spacing-xl);
    list-style: none;
}

.nav-link {
    color: var(--color-text-secondary);
    font-weight: 500;
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-sm);
    transition: var(--transition-fast);
    position: relative;
}

.nav-link:hover,
.nav-link.active {
    color: var(--color-text-primary);
}

.nav-link.active::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 50%;
    transform: translateX(-50%);
    width: 20px;
    height: 3px;
    background: var(--color-accent-gradient);
    border-radius: var(--radius-full);
}

.nav-cta {
    background: var(--color-accent-gradient);
    color: white !important;
    padding: var(--spacing-sm) var(--spacing-lg) !important;
    border-radius: var(--radius-full);
    font-weight: 600;
    box-shadow: 0 4px 15px rgba(6, 182, 212, 0.4);
}

.nav-cta:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(6, 182, 212, 0.5);
}

/* ===== Dropdown Menu ===== */
.nav-item {
    position: relative;
    height: 100%;
    display: flex;
    align-items: center;
}

.dropdown-trigger {
    display: flex;
    align-items: center;
    gap: 4px;
    height: 100%;
}

.dropdown-trigger::after {
    content: '';
    width: 0;
    height: 0;
    border-left: 4px solid transparent;
    border-right: 4px solid transparent;
    border-top: 4px solid var(--color-text-secondary);
    transition: var(--transition-fast);
}

.nav-item:hover .dropdown-trigger::after {
    border-top-color: var(--color-accent-primary);
    transform: rotate(180deg);
}

.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%) translateY(10px);
    background: rgba(10, 15, 28, 0.95);
    backdrop-filter: blur(20px);
    min-width: 220px;
    padding: var(--spacing-sm);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    z-index: 1000;
}

/* Specific width for Proposal menu as it has many items */
.nav-item:nth-child(2) .dropdown-menu {
    min-width: 260px;
    display: grid;
    grid-template-columns: 1fr;
}

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

/* Triangle connector for dropdown */
.dropdown-menu::before {
    content: '';
    position: absolute;
    top: -6px;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 0;
    border-left: 6px solid transparent;
    border-right: 6px solid transparent;
    border-bottom: 6px solid var(--color-border);
}

.dropdown-menu::after {
    content: '';
    position: absolute;
    top: -5px;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 0;
    border-left: 6px solid transparent;
    border-right: 6px solid transparent;
    border-bottom: 6px solid rgba(10, 15, 28, 0.95);
}

.dropdown-link {
    display: block;
    padding: 10px 16px;
    color: var(--color-text-secondary);
    font-size: 0.9rem;
    font-weight: 500;
    border-radius: var(--radius-sm);
    transition: var(--transition-fast);
    text-align: left;
    white-space: nowrap;
}

.dropdown-link:hover {
    background: rgba(6, 182, 212, 0.1);
    color: var(--color-accent-primary);
    padding-left: 20px;
}

/* Mobile Menu Toggle */
.menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    padding: var(--spacing-sm);
}

.menu-toggle span {
    width: 24px;
    height: 2px;
    background: var(--color-text-primary);
    border-radius: 2px;
    transition: var(--transition-fast);
}

/* ===== Hero Section ===== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: 80px;
    position: relative;
    overflow: hidden;
}

.hero-content {
    max-width: 700px;
    position: relative;
    z-index: 2;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    background: var(--color-accent-soft);
    border: 1px solid var(--color-accent-primary);
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: var(--radius-full);
    font-size: 0.875rem;
    color: var(--color-accent-primary);
    margin-bottom: var(--spacing-lg);
    animation: fadeInUp 0.6s ease;
}

.hero-badge::before {
    content: '';
    width: 8px;
    height: 8px;
    background: var(--color-success);
    border-radius: 50%;
    animation: pulse 2s infinite;
}

.hero-title {
    margin-bottom: var(--spacing-lg);
    animation: fadeInUp 0.6s ease 0.1s backwards;
}

.hero-title .gradient-text {
    background: var(--color-accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-description {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-xl);
    animation: fadeInUp 0.6s ease 0.2s backwards;
    color: var(--color-text-primary);
}

.hero-buttons {
    display: flex;
    gap: var(--spacing-md);
    flex-wrap: wrap;
    animation: fadeInUp 0.6s ease 0.3s backwards;
}

.hero-visual {
    position: absolute;
    right: -5%;
    top: 50%;
    transform: translateY(-50%);
    width: 55%;
    max-width: 700px;
    z-index: 1;
    animation: float 6s ease-in-out infinite;
}

.hero-visual img {
    width: 100%;
    height: auto;
    filter: drop-shadow(0 20px 60px rgba(6, 182, 212, 0.3));
}

/* ===== Buttons ===== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-xl);
    border-radius: var(--radius-full);
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    border: none;
    transition: var(--transition-base);
}

.btn-primary {
    background: var(--color-accent-gradient);
    color: white;
    box-shadow: 0 4px 20px rgba(6, 182, 212, 0.4);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 30px rgba(6, 182, 212, 0.5);
    color: white;
}

.btn-secondary {
    background: var(--color-bg-glass);
    color: var(--color-text-primary);
    border: 1px solid var(--color-border);
    backdrop-filter: blur(10px);
}

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

/* ===== Cards ===== */
.card {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    backdrop-filter: blur(20px);
    transition: var(--transition-base);
    position: relative;
    overflow: hidden;
}

.card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--color-accent-gradient);
    opacity: 0;
    transition: var(--transition-base);
}

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

.card:hover::before {
    opacity: 1;
}

.card-icon {
    width: 56px;
    height: 56px;
    background: var(--color-accent-soft);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    margin-bottom: var(--spacing-lg);
    color: var(--color-accent-primary);
}

.card-title {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-md);
    color: var(--color-text-primary);
}

.card-description {
    color: var(--color-text-secondary);
    font-size: 0.95rem;
}

/* ===== Feature Grid ===== */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-lg);
}

/* ===== Section Header ===== */
.section-header {
    text-align: center;
    max-width: 700px;
    margin: 0 auto var(--spacing-3xl);
}

.section-label {
    display: inline-block;
    background: var(--color-accent-soft);
    color: var(--color-accent-primary);
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: var(--radius-full);
    font-size: 0.875rem;
    font-weight: 600;
    margin-bottom: var(--spacing-md);
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.section-title {
    margin-bottom: var(--spacing-md);
}

.section-description {
    font-size: 1.125rem;
    word-break: keep-all;
}

/* ===== Architecture Section ===== */
.architecture-wrapper {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-3xl);
    align-items: center;
}

.architecture-diagram {
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    position: relative;
}

.layer {
    background: var(--color-bg-tertiary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-md);
    transition: var(--transition-base);
}

.layer:hover {
    border-color: var(--color-border-hover);
    transform: translateY(4px);
}

.layer:last-child {
    margin-bottom: 0;
}

.layer-title {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: var(--spacing-md);
}

.layer-content {
    display: flex;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
}

.layer-item {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: 0.875rem;
    color: var(--color-text-secondary);
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.layer-item.highlight {
    border-color: var(--color-accent-primary);
    color: var(--color-accent-primary);
}

.architecture-info {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.info-card {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: var(--spacing-lg);
    display: flex;
    gap: var(--spacing-md);
    backdrop-filter: blur(20px);
    transition: var(--transition-base);
}

.info-card:hover {
    border-color: var(--color-border-hover);
    transform: translateY(4px);
}

.info-icon {
    width: 48px;
    height: 48px;
    min-width: 48px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
}

.info-icon.blue {
    background: rgba(59, 130, 246, 0.2);
    color: #3b82f6;
}

.info-icon.purple {
    background: rgba(20, 184, 166, 0.2);
    color: #14b8a6;
}

.info-icon.green {
    background: rgba(16, 185, 129, 0.2);
    color: #10b981;
}

.info-icon.orange {
    background: rgba(245, 158, 11, 0.2);
    color: #f59e0b;
}

.info-icon.cyan {
    background: rgba(6, 182, 212, 0.2);
    color: #06b6d4;
}

.info-content h4 {
    margin-bottom: var(--spacing-xs);
    color: var(--color-text-primary);
}

.info-content p {
    font-size: 0.9rem;
    color: var(--color-text-muted);
}

/* ===== Tech Stack Section ===== */
.tech-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
}

.tech-card {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    text-align: center;
    transition: var(--transition-base);
    position: relative;
    overflow: hidden;
}

.tech-card::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--color-accent-gradient);
    transform: scaleX(0);
    transition: var(--transition-base);
}

.tech-card:hover {
    transform: translateY(4px);
    box-shadow: var(--shadow-glow);
}

.tech-card:hover::after {
    transform: scaleX(1);
}

.tech-icon {
    width: 72px;
    height: 72px;
    margin: 0 auto var(--spacing-lg);
    background: var(--color-accent-soft);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
}

.tech-name {
    font-size: 1.125rem;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
    color: var(--color-text-primary);
}

.tech-version {
    font-size: 0.875rem;
    color: var(--color-accent-primary);
    margin-bottom: var(--spacing-md);
}

.tech-desc {
    font-size: 0.9rem;
    color: var(--color-text-muted);
}

/* ===== Data Flow Section ===== */
.flow-container {
    display: flex;
    justify-content: center;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
    padding: var(--spacing-xl);
    background: var(--color-bg-secondary);
    border-radius: var(--radius-xl);
    border: 1px solid var(--color-border);
}

.flow-step {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.flow-box {
    background: var(--color-bg-tertiary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: var(--spacing-md) var(--spacing-lg);
    text-align: center;
    min-width: 140px;
    transition: var(--transition-base);
}

.flow-box:hover {
    border-color: var(--color-accent-primary);
    transform: translateY(4px);
}

.flow-box-icon {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-sm);
}

.flow-box-title {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--color-text-primary);
}

.flow-box-desc {
    font-size: 0.75rem;
    color: var(--color-text-muted);
    margin-top: var(--spacing-xs);
}

.flow-arrow {
    color: var(--color-accent-primary);
    font-size: 1.5rem;
}

/* ===== Stats Section ===== */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-lg);
}

.stat-card {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    text-align: center;
    backdrop-filter: blur(20px);
    transition: var(--transition-base);
}

.stat-card:hover {
    border-color: var(--color-border-hover);
    transform: translateY(4px);
}

.stat-value {
    font-size: 3rem;
    font-weight: 800;
    background: var(--color-accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1;
    margin-bottom: var(--spacing-sm);
}

.stat-label {
    font-size: 0.95rem;
    color: var(--color-text-secondary);
}

/* ===== Table Styles ===== */
.table-container {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    backdrop-filter: blur(20px);
}

.data-table {
    width: 100%;
    border-collapse: collapse;
}

.data-table th,
.data-table td {
    padding: var(--spacing-md) var(--spacing-lg);
    text-align: left;
    border-bottom: 1px solid var(--color-border);
}

.data-table th {
    background: var(--color-bg-tertiary);
    font-weight: 600;
    color: var(--color-text-primary);
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.data-table td {
    color: var(--color-text-secondary);
    font-size: 0.95rem;
}

.data-table tr:last-child td {
    border-bottom: none;
}

.data-table tr:hover td {
    background: var(--color-bg-tertiary);
}

.data-table code {
    background: var(--color-bg-primary);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-sm);
    font-family: var(--font-mono);
    font-size: 0.85rem;
    color: var(--color-accent-primary);
}

/* ===== API Endpoint Badge ===== */
.method-badge {
    display: inline-block;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    font-weight: 700;
    font-family: var(--font-mono);
    min-width: 55px;
    text-align: center;
}

.method-badge.get {
    background: rgba(16, 185, 129, 0.2);
    color: #10b981;
}

.method-badge.post {
    color: #3b82f6;
}

.method-badge.put {
    background: rgba(245, 158, 11, 0.2);
    color: #f59e0b;
}

.method-badge.delete {
    background: rgba(239, 68, 68, 0.2);
    color: #ef4444;
}

/* ===== Timeline / Steps ===== */
.steps-container {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
    position: relative;
    padding-left: var(--spacing-3xl);
}

.steps-container::before {
    content: '';
    position: absolute;
    left: 15px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: var(--color-border);
}

.step-item {
    position: relative;
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: var(--spacing-lg);
    transition: var(--transition-base);
}

.step-item::before {
    content: attr(data-step);
    position: absolute;
    left: calc(-1 * var(--spacing-3xl) - 6px);
    top: 50%;
    transform: translateY(-50%);
    width: 32px;
    height: 32px;
    background: var(--color-accent-gradient);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 0.875rem;
    color: white;
}

.step-item:hover {
    border-color: var(--color-border-hover);
    transform: translateY(4px);
}

/* ===== Game-Like Box Drop Hover ===== */
@keyframes gameDropHover {
    0% {
        transform: translateY(0) scale(1);
    }

    38% {
        transform: translateY(8px) scale(0.992);
    }

    68% {
        transform: translateY(3px) scale(0.998);
    }

    100% {
        transform: translateY(4px) scale(1);
    }
}

.card:hover,
.info-card:hover,
.tech-card:hover,
.stat-card:hover,
.step-item:hover,
.layer:hover,
.flow-box:hover {
    animation: gameDropHover var(--transition-slow) cubic-bezier(0.2, 0.85, 0.25, 1) both;
    will-change: transform;
}

.step-title {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    color: var(--color-text-primary);
}

.step-desc {
    color: var(--color-text-secondary);
    font-size: 0.95rem;
}

/* ===== Code Block ===== */
.code-block {
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: var(--spacing-lg);
    font-family: var(--font-mono);
    font-size: 0.9rem;
    overflow-x: auto;
    position: relative;
}

.code-block::before {
    content: attr(data-lang);
    position: absolute;
    top: var(--spacing-sm);
    right: var(--spacing-md);
    font-size: 0.75rem;
    color: var(--color-text-muted);
    text-transform: uppercase;
}

.code-block code {
    color: var(--color-text-secondary);
}

.code-block .keyword {
    color: #c792ea;
}

.code-block .string {
    color: #c3e88d;
}

.code-block .comment {
    color: #546e7a;
}

.code-block .function {
    color: #82aaff;
}

/* ===== CTA Section ===== */
.cta-section {
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.15) 0%, rgba(139, 92, 246, 0.1) 100%);
    border: 1px solid rgba(99, 102, 241, 0.3);
    border-radius: var(--radius-xl);
    padding: var(--spacing-3xl);
    text-align: center;
    position: relative;
    overflow: hidden;
}

.cta-section::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(99, 102, 241, 0.1) 0%, transparent 50%);
    animation: rotate 20s linear infinite;
}

.cta-content {
    position: relative;
    z-index: 1;
}

.cta-title {
    margin-bottom: var(--spacing-md);
}

.cta-description {
    font-size: 1.125rem;
    margin-bottom: var(--spacing-xl);
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

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

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

.footer-brand {
    max-width: 300px;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 1.25rem;
    font-weight: 800;
    margin-bottom: var(--spacing-md);
    color: var(--color-text-primary);
}

.footer-desc {
    color: var(--color-text-muted);
    font-size: 0.95rem;
    line-height: 1.7;
}

.footer-nav h4 {
    color: var(--color-text-primary);
    font-size: 1rem;
    margin-bottom: var(--spacing-lg);
}

.footer-links {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.footer-links a {
    color: var(--color-text-muted);
    font-size: 0.95rem;
    transition: var(--transition-fast);
}

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

.footer-bottom {
    padding-top: var(--spacing-xl);
    border-top: 1px solid var(--color-border);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

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

.footer-social {
    display: flex;
    gap: var(--spacing-md);
}

.footer-social a {
    width: 40px;
    height: 40px;
    background: var(--color-bg-tertiary);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-text-secondary);
    transition: var(--transition-fast);
}

.footer-social a:hover {
    background: var(--color-accent-primary);
    color: white;
}

/* ===== Animations ===== */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes float {

    0%,
    100% {
        transform: translateY(-50%) translateX(0);
    }

    50% {
        transform: translateY(-50%) translateX(-10px);
    }
}

@keyframes pulse {

    0%,
    100% {
        opacity: 1;
        transform: scale(1);
    }

    50% {
        opacity: 0.5;
        transform: scale(1.2);
    }
}

@keyframes rotate {
    from {
        transform: rotate(0deg);
    }

    to {
        transform: rotate(360deg);
    }
}

/* ===== Scrollbar ===== */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

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

::-webkit-scrollbar-thumb {
    background: var(--color-bg-tertiary);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--color-accent-primary);
}

/* ===== Responsive Design ===== */
@media (max-width: 1024px) {
    .hero-visual {
        display: none;
    }

    .hero-content {
        max-width: 100%;
        text-align: center;
    }

    .hero-buttons {
        justify-content: center;
    }

    .architecture-wrapper {
        grid-template-columns: 1fr;
    }

    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }

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

@media (max-width: 768px) {
    .navbar .container {
        position: relative;
    }

    .menu-toggle {
        display: flex;
    }

    .nav-menu {
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--color-bg-secondary);
        border: 1px solid var(--color-border);
        border-radius: var(--radius-md);
        padding: var(--spacing-lg);
        flex-direction: column;
        gap: var(--spacing-sm);
        display: none;
        margin-top: var(--spacing-md);
    }

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

    .stats-grid {
        grid-template-columns: 1fr;
    }

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

    .flow-arrow {
        transform: rotate(90deg);
    }

    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .footer-brand {
        max-width: 100%;
    }

    .footer-bottom {
        flex-direction: column;
        gap: var(--spacing-md);
    }

    .section {
        padding: var(--spacing-2xl) 0;
    }
}

@media (max-width: 480px) {
    html {
        font-size: 14px;
    }

    .container {
        padding: 0 var(--spacing-md);
    }

    .hero-buttons {
        flex-direction: column;
    }

    .btn {
        width: 100%;
        justify-content: center;
    }
}

/* ===== Utility Classes ===== */
.text-center {
    text-align: center;
}

.text-left {
    text-align: left;
}

.text-gradient {
    background: var(--color-accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.mt-1 {
    margin-top: var(--spacing-md);
}

.mt-2 {
    margin-top: var(--spacing-lg);
}

.mt-3 {
    margin-top: var(--spacing-xl);
}

.mb-1 {
    margin-bottom: var(--spacing-md);
}

.mb-2 {
    margin-bottom: var(--spacing-lg);
}

.mb-3 {
    margin-bottom: var(--spacing-xl);
}

.hidden {
    display: none;
}

.visible {
    display: block;
}