/* ===========================
   LawBot - CSS Styles
   4대 법률 분야 특화 AI 법률 정보 서비스
   =========================== */

/* CSS Variables */
:root {
    /* Colors - Professional Legal Palette */
    --color-bg-primary: #0a0f1a;
    --color-bg-secondary: #0f172a;
    --color-bg-tertiary: #1e293b;

    /* Primary Colors - Blue for Trust */
    --color-primary: #3b82f6;
    --color-primary-light: #60a5fa;
    --color-primary-dark: #2563eb;

    /* Accent Colors */
    --color-gold: #f59e0b;
    --color-gold-light: #fbbf24;
    --color-emerald: #10b981;

    /* Area Colors */
    --color-labor: #3b82f6;
    --color-housing: #10b981;
    --color-consumer: #f59e0b;
    --color-traffic: #ef4444;

    /* Text Colors */
    --color-text-primary: #ffffff;
    --color-text-secondary: rgba(255, 255, 255, 0.75);
    --color-text-tertiary: rgba(255, 255, 255, 0.55);
    --color-text-muted: rgba(255, 255, 255, 0.35);

    /* Borders */
    --color-border: rgba(255, 255, 255, 0.1);
    --color-border-light: rgba(255, 255, 255, 0.05);

    /* Gradients */
    --gradient-primary: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
    --gradient-radial: radial-gradient(ellipse at center, rgba(59, 130, 246, 0.1) 0%, transparent 70%);

    /* Glass Effect */
    --glass-bg: rgba(15, 23, 42, 0.8);
    --glass-border: rgba(255, 255, 255, 0.1);
    --glass-blur: 16px;

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

    /* Spacing */
    --space-xs: 0.5rem;
    --space-sm: 1rem;
    --space-md: 1.5rem;
    --space-lg: 2rem;
    --space-xl: 3rem;
    --space-2xl: 5rem;
    --space-3xl: 8rem;
    --space-4xl: 10rem;

    /* Layout */
    --container-max: 1280px;
    --container-padding: 1.5rem;

    /* Animation */
    --transition-fast: 0.2s ease;
    --transition-base: 0.3s ease;
    --transition-slow: 0.5s ease;

    /* Z-index */
    --z-canvas: -1;
    --z-content: 1;
    --z-nav: 100;
    --z-modal: 200;
}

/* Icon Sizes */
.icon-xs { width: 14px; height: 14px; }
.icon-sm { width: 18px; height: 18px; }
.icon { width: 22px; height: 22px; }
.icon-md { width: 28px; height: 28px; }
.icon-lg { width: 36px; height: 36px; }
.icon-xl { width: 48px; height: 48px; }

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

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

body {
    font-family: var(--font-primary);
    font-weight: 400;
    line-height: 1.6;
    color: var(--color-text-primary);
    background-color: var(--color-bg-primary);
    -webkit-font-smoothing: antialiased;
    letter-spacing: -0.03em;
    overflow-x: hidden;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.2;
    letter-spacing: -0.04em;
}

h1 { font-size: clamp(2.5rem, 5vw, 4rem); }
h2 { font-size: clamp(2rem, 4vw, 3rem); }
h3 { font-size: clamp(1.25rem, 2vw, 1.5rem); }

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

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

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

/* Particle Canvas */
#particle-canvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: var(--z-canvas);
    pointer-events: none;
}

/* Glass Card */
.glass-card {
    background: var(--glass-bg);
    backdrop-filter: blur(var(--glass-blur));
    -webkit-backdrop-filter: blur(var(--glass-blur));
    border: 1px solid var(--glass-border);
    border-radius: 16px;
}

/* ===========================
   Navigation
   =========================== */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: var(--z-nav);
    padding: var(--space-md) 0;
    transition: background var(--transition-base), padding var(--transition-base);
}

.nav.scrolled {
    background: rgba(10, 15, 26, 0.95);
    backdrop-filter: blur(20px);
    padding: var(--space-sm) 0;
    border-bottom: 1px solid var(--glass-border);
}

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

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

.logo-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-primary);
}

.logo-text {
    font-size: 1.25rem;
    font-weight: 700;
    letter-spacing: -0.02em;
}

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

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

.nav-link {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--color-text-secondary);
    transition: color var(--transition-fast);
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-primary);
    transition: width var(--transition-base);
}

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

.nav-link:hover::after {
    width: 100%;
}

/* AI 상담 메뉴 강조 */
.nav-link-highlight {
    color: var(--color-primary-light) !important;
    font-weight: 600;
}

.nav-link-highlight.active {
    color: var(--color-primary) !important;
}

.nav-link-highlight::after {
    background: var(--color-primary) !important;
}

.nav-divider {
    width: 1px;
    height: 20px;
    background: rgba(255, 255, 255, 0.2);
    margin: 0 0.5rem;
}

.nav-cta {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    padding: 0.625rem 1.25rem;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--color-bg-primary);
    background: var(--gradient-primary);
    border-radius: 100px;
    transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.nav-cta:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 30px rgba(59, 130, 246, 0.3);
}

.nav-mobile-toggle {
    display: none;
    flex-direction: column;
    gap: 6px;
    padding: 8px;
    background: none;
    border: none;
    cursor: pointer;
}

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

/* ===========================
   Hero Section
   =========================== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    padding: var(--space-3xl) 0;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 150%;
    height: 100%;
    background: var(--gradient-radial);
    pointer-events: none;
}

/* Hero with Chat Layout */
.hero.hero-with-chat {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: calc(var(--space-3xl) + 60px) var(--container-padding) var(--space-2xl);
}

.hero.hero-with-chat .hero-content {
    flex: 1;
    max-width: 520px;
    padding-left: 0;
    padding-right: var(--space-xl);
}

.hero.hero-with-chat .hero-chat {
    flex: 1;
    max-width: 560px;
}

.hero-content {
    position: relative;
    z-index: var(--z-content);
    max-width: 700px;
    padding-left: var(--container-padding);
}

/* Hero Areas Badges */
.hero-areas {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-sm);
    margin-bottom: var(--space-lg);
    opacity: 0;
    transform: translateY(20px);
}

.area-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 0.375rem 0.75rem;
    font-size: 0.75rem;
    font-weight: 500;
    border-radius: 100px;
    transition: transform var(--transition-fast);
}

.area-badge:hover {
    transform: translateY(-2px);
}

.area-badge.labor {
    background: rgba(59, 130, 246, 0.15);
    color: var(--color-primary-light);
    border: 1px solid rgba(59, 130, 246, 0.3);
}

.area-badge.housing {
    background: rgba(16, 185, 129, 0.15);
    color: var(--color-emerald);
    border: 1px solid rgba(16, 185, 129, 0.3);
}

.area-badge.consumer {
    background: rgba(245, 158, 11, 0.15);
    color: var(--color-gold-light);
    border: 1px solid rgba(245, 158, 11, 0.3);
}

.area-badge.traffic {
    background: rgba(239, 68, 68, 0.15);
    color: #f87171;
    border: 1px solid rgba(239, 68, 68, 0.3);
}

/* Hero AI Notice */
.hero-ai-notice {
    display: flex;
    align-items: flex-start;
    gap: var(--space-sm);
    padding: var(--space-md);
    margin-top: var(--space-lg);
    background: rgba(245, 158, 11, 0.08);
    border: 1px solid rgba(245, 158, 11, 0.2);
    border-radius: 12px;
    opacity: 0;
    transform: translateY(20px);
}

.hero-ai-notice i {
    flex-shrink: 0;
    color: var(--color-gold);
    margin-top: 2px;
}

.hero-ai-notice p {
    font-size: 0.8125rem;
    color: var(--color-text-tertiary);
    line-height: 1.5;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    padding: 0.5rem 1rem;
    margin-bottom: var(--space-lg);
    background: rgba(59, 130, 246, 0.1);
    border: 1px solid rgba(59, 130, 246, 0.3);
    border-radius: 100px;
    opacity: 0;
    transform: translateY(20px);
}

.badge-dot {
    width: 8px;
    height: 8px;
    background: var(--color-primary);
    border-radius: 50%;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.5; transform: scale(1.2); }
}

.badge-text {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--color-primary-light);
    letter-spacing: 0.02em;
}

.hero-title {
    margin-bottom: var(--space-lg);
}

.title-line {
    display: block;
    opacity: 0;
    transform: translateY(40px);
}

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

.hero-description {
    font-size: 1.125rem;
    line-height: 1.8;
    color: var(--color-text-secondary);
    margin-bottom: var(--space-xl);
    opacity: 0;
    transform: translateY(30px);
}

/* Hero Trust Indicators */
.hero-trust {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-lg);
    opacity: 0;
    transform: translateY(20px);
}

.trust-item {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    font-size: 0.875rem;
    color: var(--color-text-tertiary);
}

.trust-item i {
    color: var(--color-primary);
    opacity: 0.7;
}

/* Hero Chat */
.hero-chat {
    position: relative;
    z-index: var(--z-content);
    opacity: 0;
    transform: translateY(30px);
}

.hero-chat .chat-container {
    max-width: 100%;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.4);
}

.hero-chat .chat-messages {
    min-height: 320px;
    max-height: 400px;
    overflow: hidden;
    transition: min-height 0.4s ease, max-height 0.4s ease;
}

/* Expanded chat when conversation starts */
.hero-chat .chat-container.chat-expanded .chat-messages {
    min-height: 450px;
    max-height: 550px;
}

/* Full Width Chat Mode */
.hero.hero-with-chat.chat-fullwidth {
    flex-direction: column;
    align-items: center;
}

.hero.hero-with-chat.chat-fullwidth .hero-content {
    display: none;
}

.hero.hero-with-chat.chat-fullwidth .hero-chat {
    max-width: 1000px;
    width: 100%;
    flex: none;
}

.hero.hero-with-chat.chat-fullwidth .chat-messages {
    min-height: 500px;
    max-height: 600px;
}

/* Chat Container */
.chat-container {
    max-width: 800px;
    margin: 0 auto;
    overflow: hidden;
}

.chat-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--space-md) var(--space-lg);
    border-bottom: 1px solid var(--glass-border);
}

.chat-status {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    font-size: 0.875rem;
    color: var(--color-text-secondary);
}

.status-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
}

.status-dot.active {
    background: #4ade80;
    animation: pulse 2s infinite;
}

.chat-header-right {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.change-category-btn {
    display: flex;
    align-items: center;
    gap: 4px;
    padding: 0.25rem 0.625rem;
    font-size: 0.75rem;
    color: var(--color-text-tertiary);
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.2s ease;
}

.change-category-btn:hover {
    color: var(--color-text-primary);
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.2);
}

.change-category-btn i {
    width: 12px;
    height: 12px;
}

.chat-info {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--color-primary-light);
    padding: 0.25rem 0.75rem;
    background: rgba(59, 130, 246, 0.1);
    border-radius: 100px;
}

.chat-messages {
    min-height: 400px;
    max-height: 500px;
    overflow-y: auto;
    padding: var(--space-lg);
    scroll-behavior: smooth;
    overscroll-behavior: contain;
    -webkit-overflow-scrolling: touch;
    isolation: isolate;
    touch-action: pan-y;
}

/* Custom Scrollbar for Chat Messages */
.chat-messages::-webkit-scrollbar {
    width: 8px;
}

.chat-messages::-webkit-scrollbar-track {
    background: rgba(255, 255, 255, 0.05);
    border-radius: 4px;
}

.chat-messages::-webkit-scrollbar-thumb {
    background: rgba(59, 130, 246, 0.3);
    border-radius: 4px;
    transition: background var(--transition-fast);
}

.chat-messages::-webkit-scrollbar-thumb:hover {
    background: rgba(59, 130, 246, 0.5);
}

/* Law Links and Download Buttons */
.law-link-btn:hover {
    background: rgba(59, 130, 246, 0.2) !important;
    border-color: rgba(59, 130, 246, 0.5) !important;
    transform: translateY(-1px);
}

.download-btn:hover {
    background: rgba(16, 185, 129, 0.2) !important;
    border-color: rgba(16, 185, 129, 0.5) !important;
    transform: translateY(-1px);
}

/* Chat Welcome */
.chat-welcome {
    text-align: center;
    padding: var(--space-xl) var(--space-md);
}

.welcome-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--space-md);
    color: var(--color-primary);
}

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

.chat-welcome p {
    font-size: 0.9375rem;
    color: var(--color-text-secondary);
    margin-bottom: var(--space-lg);
}

/* Welcome Laws */
.welcome-laws {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--space-xs);
    margin-bottom: var(--space-lg);
}

.law-badge {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    font-size: 0.6875rem;
    color: var(--color-primary-light);
    padding: 0.25rem 0.5rem;
    background: rgba(59, 130, 246, 0.1);
    border-radius: 4px;
}

/* Category Select Buttons */
.category-select {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-sm);
    margin-top: var(--space-md);
}

.category-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: var(--space-md) var(--space-sm);
    font-family: var(--font-primary);
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid var(--glass-border);
    border-radius: 12px;
    cursor: pointer;
    transition: all var(--transition-base);
    text-align: center;
}

.category-btn:hover {
    transform: translateY(-2px);
}

.category-btn.labor {
    color: var(--color-labor);
}
.category-btn.labor:hover {
    background: rgba(59, 130, 246, 0.1);
    border-color: rgba(59, 130, 246, 0.3);
}

.category-btn.housing {
    color: var(--color-housing);
}
.category-btn.housing:hover {
    background: rgba(16, 185, 129, 0.1);
    border-color: rgba(16, 185, 129, 0.3);
}

.category-btn.consumer {
    color: var(--color-consumer);
}
.category-btn.consumer:hover {
    background: rgba(245, 158, 11, 0.1);
    border-color: rgba(245, 158, 11, 0.3);
}

.category-btn.traffic {
    color: var(--color-traffic);
}
.category-btn.traffic:hover {
    background: rgba(239, 68, 68, 0.1);
    border-color: rgba(239, 68, 68, 0.3);
}

.category-btn.selected {
    transform: scale(1.02);
}

.category-btn.selected.labor {
    background: rgba(59, 130, 246, 0.15);
    border-color: var(--color-labor);
    box-shadow: 0 0 20px rgba(59, 130, 246, 0.2);
}

.category-btn.selected.housing {
    background: rgba(16, 185, 129, 0.15);
    border-color: var(--color-housing);
    box-shadow: 0 0 20px rgba(16, 185, 129, 0.2);
}

.category-btn.selected.consumer {
    background: rgba(245, 158, 11, 0.15);
    border-color: var(--color-consumer);
    box-shadow: 0 0 20px rgba(245, 158, 11, 0.2);
}

.category-btn.selected.traffic {
    background: rgba(239, 68, 68, 0.15);
    border-color: var(--color-traffic);
    box-shadow: 0 0 20px rgba(239, 68, 68, 0.2);
}

.category-name {
    font-size: 0.9375rem;
    font-weight: 600;
    color: inherit;
}

.category-desc {
    font-size: 0.75rem;
    color: var(--color-text-tertiary);
}

/* Example Buttons */
.welcome-examples {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--space-sm);
}

.example-label {
    flex-basis: 100%;
    font-size: 0.75rem;
    color: var(--color-text-muted);
    margin-bottom: var(--space-xs);
}

.example-btn {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    font-family: var(--font-primary);
    font-size: 0.8125rem;
    color: var(--color-primary-light);
    padding: 0.5rem 1rem;
    background: rgba(59, 130, 246, 0.1);
    border: 1px solid rgba(59, 130, 246, 0.2);
    border-radius: 100px;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.example-btn:hover {
    background: rgba(59, 130, 246, 0.2);
    border-color: rgba(59, 130, 246, 0.4);
}

/* Chat Messages */
.message {
    display: flex;
    gap: var(--space-sm);
    margin-bottom: var(--space-md);
}

.message-user {
    flex-direction: row-reverse;
}

.message-avatar {
    flex-shrink: 0;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.875rem;
    font-weight: 600;
}

.message-user .message-avatar {
    background: var(--color-bg-tertiary);
    color: var(--color-text-primary);
}

.message-ai .message-avatar {
    background: var(--gradient-primary);
    color: var(--color-bg-primary);
}

.message-content {
    max-width: 70%;
    padding: var(--space-md);
    border-radius: 16px;
    font-size: 0.9375rem;
    line-height: 1.6;
}

.message-user .message-content {
    background: var(--color-bg-tertiary);
    border-bottom-right-radius: 4px;
}

.message-ai .message-content {
    background: rgba(59, 130, 246, 0.1);
    border: 1px solid rgba(59, 130, 246, 0.2);
    border-bottom-left-radius: 4px;
}

/* AI 메시지 단락 간격 개선 */
.message-ai .message-content p {
    margin-bottom: 1.5em;
    line-height: 1.8;
}

.message-ai .message-content p:last-child {
    margin-bottom: 0;
}

.message-ai .message-content br {
    display: block;
    content: "";
    margin-bottom: 0.5em;
}

/* Chat Input */
.chat-input-container {
    padding: var(--space-lg);
    border-top: 1px solid var(--glass-border);
}

.chat-input-wrapper {
    display: flex;
    align-items: flex-end;
    gap: var(--space-sm);
    padding: var(--space-sm);
    background: rgba(0, 0, 0, 0.3);
    border: 1px solid var(--glass-border);
    border-radius: 16px;
    transition: border-color var(--transition-fast);
}

.chat-input-wrapper:focus-within {
    border-color: var(--color-primary);
}

#chat-input {
    flex: 1;
    padding: var(--space-sm);
    font-family: var(--font-primary);
    font-size: 0.9375rem;
    color: var(--color-text-primary);
    background: transparent;
    border: none;
    outline: none;
    resize: none;
    min-height: 24px;
    max-height: 120px;
}

#chat-input::placeholder {
    color: var(--color-text-muted);
}

.chat-submit-btn {
    flex-shrink: 0;
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-primary);
    border: none;
    border-radius: 12px;
    color: var(--color-bg-primary);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.chat-submit-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.chat-submit-btn:not(:disabled):hover {
    transform: scale(1.05);
    box-shadow: 0 4px 15px rgba(59, 130, 246, 0.3);
}

.chat-disclaimer {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-xs);
    font-size: 0.75rem;
    color: var(--color-text-muted);
    text-align: center;
    margin-top: var(--space-sm);
}

/* ===========================
   Trust Section
   =========================== */
.trust-section {
    padding: var(--space-3xl) 0;
    background: linear-gradient(180deg, var(--color-bg-primary) 0%, var(--color-bg-secondary) 100%);
}

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

.trust-title {
    font-size: clamp(1.5rem, 3vw, 2rem);
    color: var(--color-text-primary);
    margin-top: var(--space-sm);
}

.trust-title .highlight {
    color: var(--color-primary);
}

.trust-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-lg);
}

.trust-card {
    text-align: center;
    padding: var(--space-xl);
    opacity: 0;
    transform: translateY(20px);
    transition: transform var(--transition-base);
}

.trust-card:hover {
    transform: translateY(-5px);
}

.trust-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--space-md);
    color: var(--color-primary);
}

.trust-value {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--color-text-primary);
    margin-bottom: var(--space-xs);
    font-variant-numeric: tabular-nums;
}

.trust-value.counting {
    color: var(--color-primary-light);
}

.trust-value.static-value {
    font-size: 1.8rem;
    color: var(--color-primary);
}

.trust-label {
    font-size: 1rem;
    font-weight: 600;
    color: var(--color-text-secondary);
    margin-bottom: var(--space-sm);
}

.trust-detail {
    font-size: 0.8125rem;
    color: var(--color-text-tertiary);
}

/* Trust Badges */
.trust-badges {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--space-sm);
    margin-top: var(--space-xl);
    padding-top: var(--space-xl);
    border-top: 1px solid var(--glass-border);
}

.trust-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 0.8125rem;
    color: var(--color-text-secondary);
    padding: 0.5rem 1rem;
    background: rgba(59, 130, 246, 0.05);
    border: 1px solid rgba(59, 130, 246, 0.1);
    border-radius: 100px;
}

.trust-badge i {
    color: var(--color-emerald);
}

/* ===========================
   Disclaimer Banner
   =========================== */
.disclaimer-banner {
    padding: var(--space-md) 0;
    background: rgba(245, 158, 11, 0.08);
    border-top: 1px solid rgba(245, 158, 11, 0.2);
    border-bottom: 1px solid rgba(245, 158, 11, 0.2);
}

.disclaimer-content {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-md);
    text-align: center;
}

.disclaimer-content i {
    flex-shrink: 0;
    color: var(--color-gold);
}

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

.disclaimer-content strong {
    color: var(--color-gold);
}

.disclaimer-content em {
    font-style: normal;
    color: var(--color-text-primary);
}

/* ===========================
   Section Common Styles
   =========================== */
.section-header {
    text-align: center;
    margin-bottom: var(--space-2xl);
}

.section-tag {
    display: inline-block;
    font-family: var(--font-mono);
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--color-primary);
    letter-spacing: 0.1em;
    text-transform: uppercase;
    padding: 0.5rem 1rem;
    background: rgba(59, 130, 246, 0.1);
    border-radius: 100px;
    margin-bottom: var(--space-md);
}

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

.section-title span {
    display: block;
}

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

/* Blur Reveal Animation */
.blur-reveal {
    opacity: 0;
    filter: blur(10px);
    transform: translateY(20px);
}

/* ===========================
   Features Section
   =========================== */
.features {
    padding: var(--space-3xl) 0;
    position: relative;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-lg);
}

.feature-card {
    padding: var(--space-xl);
    transition: transform var(--transition-base), box-shadow var(--transition-base);
    opacity: 0;
    transform: translateY(40px);
}

.feature-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
    border-color: rgba(59, 130, 246, 0.3);
}

.feature-card-wide {
    grid-column: span 3;
}

.feature-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 56px;
    height: 56px;
    margin-bottom: var(--space-lg);
    color: var(--color-primary);
}

.feature-title {
    font-size: 1.25rem;
    margin-bottom: var(--space-sm);
    color: var(--color-text-primary);
}

.feature-desc {
    font-size: 0.9375rem;
    color: var(--color-text-secondary);
    line-height: 1.7;
}

/* ===========================
   How It Works - RAG Process
   =========================== */
.how-it-works {
    padding: var(--space-3xl) 0;
    background: var(--color-bg-secondary);
}

.rag-process {
    display: flex;
    align-items: flex-start;
    justify-content: center;
    gap: var(--space-md);
}

.rag-step {
    flex: 1;
    max-width: 240px;
    padding: var(--space-xl);
    text-align: center;
    opacity: 0;
    transform: translateY(20px);
    transition: transform var(--transition-base);
}

.rag-step:hover {
    transform: translateY(-5px);
}

.rag-step-number {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--color-primary);
    margin-bottom: var(--space-md);
}

.rag-step-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--space-md);
    color: var(--color-primary);
}

.rag-step-title {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: var(--space-sm);
    color: var(--color-text-primary);
}

.rag-step-desc {
    font-size: 0.8125rem;
    color: var(--color-text-tertiary);
}

.rag-arrow {
    display: flex;
    align-items: center;
    justify-content: center;
    padding-top: var(--space-3xl);
    color: var(--color-primary);
    opacity: 0;
}

/* ===========================
   Categories Section - 4대 특화 분야
   =========================== */
.categories {
    padding: var(--space-3xl) 0;
}

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

.category-area {
    padding: var(--space-xl);
    opacity: 0;
    transform: translateY(20px);
    transition: all var(--transition-base);
}

.category-area:hover {
    transform: translateY(-5px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
}

.area-header {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    margin-bottom: var(--space-lg);
}

.area-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 56px;
    height: 56px;
    border-radius: 12px;
}

.area-icon.labor {
    background: rgba(59, 130, 246, 0.15);
    color: var(--color-primary-light);
}

.area-icon.housing {
    background: rgba(16, 185, 129, 0.15);
    color: var(--color-emerald);
}

.area-icon.consumer {
    background: rgba(245, 158, 11, 0.15);
    color: var(--color-gold);
}

.area-icon.traffic {
    background: rgba(239, 68, 68, 0.15);
    color: #f87171;
}

.area-info {
    flex: 1;
}

.area-title {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--color-text-primary);
    margin-bottom: 4px;
}

.area-subtitle {
    font-size: 0.8125rem;
    color: var(--color-text-tertiary);
}

.area-content {
    padding-top: var(--space-md);
    border-top: 1px solid var(--color-border);
}

.area-topics {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-sm);
    margin-bottom: var(--space-lg);
}

.topic-item {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    font-size: 0.875rem;
    color: var(--color-text-secondary);
}

.topic-item i {
    color: var(--color-primary);
    opacity: 0.7;
}

.area-laws {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-xs);
}

.law-tag {
    font-family: var(--font-mono);
    font-size: 0.6875rem;
    color: var(--color-primary-light);
    padding: 0.25rem 0.5rem;
    background: rgba(59, 130, 246, 0.1);
    border-radius: 4px;
}

/* ===========================
   Disclaimer Section
   =========================== */
.disclaimer-section {
    padding: var(--space-2xl) 0;
}

.disclaimer-box {
    display: flex;
    align-items: flex-start;
    gap: var(--space-xl);
    padding: var(--space-xl);
    background: rgba(245, 158, 11, 0.05);
    border: 1px solid rgba(245, 158, 11, 0.2);
}

.disclaimer-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    color: var(--color-gold);
}

.disclaimer-text h3 {
    font-size: 1.25rem;
    color: var(--color-gold);
    margin-bottom: var(--space-md);
}

.disclaimer-text p {
    font-size: 0.9375rem;
    color: var(--color-text-secondary);
    margin-bottom: var(--space-sm);
    line-height: 1.7;
}

.disclaimer-text p:last-child {
    margin-bottom: 0;
}

.disclaimer-text strong {
    color: var(--color-text-primary);
}

/* ===========================
   FAQ Section
   =========================== */
.faq {
    padding: var(--space-3xl) 0;
    background: var(--color-bg-secondary);
}

.faq-list {
    max-width: 800px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

.faq-item {
    overflow: hidden;
}

.faq-question {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--space-lg);
    cursor: pointer;
    list-style: none;
    font-size: 1rem;
    font-weight: 600;
    color: var(--color-text-primary);
    transition: color var(--transition-fast);
}

.faq-question::-webkit-details-marker {
    display: none;
}

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

.faq-question i {
    flex-shrink: 0;
    color: var(--color-primary);
    transition: transform var(--transition-base);
}

.faq-item[open] .faq-question i {
    transform: rotate(180deg);
}

.faq-answer {
    padding: 0 var(--space-lg) var(--space-lg);
}

.faq-answer p {
    font-size: 0.9375rem;
    color: var(--color-text-secondary);
    line-height: 1.7;
    margin-bottom: var(--space-sm);
}

.faq-answer p:last-child {
    margin-bottom: 0;
}

.faq-answer ul {
    list-style: none;
    padding-left: var(--space-md);
}

.faq-answer li {
    font-size: 0.9375rem;
    color: var(--color-text-secondary);
    margin-bottom: var(--space-xs);
    position: relative;
}

.faq-answer li::before {
    content: '•';
    position: absolute;
    left: -1rem;
    color: var(--color-primary);
}

.faq-answer strong {
    color: var(--color-primary);
}

/* ===========================
   Footer
   =========================== */
.footer {
    padding: var(--space-2xl) 0 var(--space-lg);
    background: var(--color-bg-primary);
    border-top: 1px solid var(--glass-border);
}

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

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

.footer-brand .nav-logo {
    margin-bottom: var(--space-md);
}

.footer-tagline {
    font-size: 0.875rem;
    color: var(--color-text-tertiary);
    line-height: 1.6;
}

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

.footer-col-title {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--color-primary);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: var(--space-md);
}

.footer-col {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.footer-link {
    font-size: 0.875rem;
    color: var(--color-text-tertiary);
    transition: color var(--transition-fast);
}

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

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: var(--space-lg);
    border-top: 1px solid var(--glass-border);
    flex-wrap: wrap;
    gap: var(--space-md);
}

.copyright {
    font-size: 0.8125rem;
    color: var(--color-text-muted);
}

.footer-disclaimer p {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    font-size: 0.75rem;
    color: var(--color-text-muted);
}

.footer-version {
    font-size: 0.6875rem;
    color: var(--color-text-muted);
    opacity: 0.6;
    margin-top: var(--space-sm);
}

/* ===========================
   카카오 애드핏 광고
   =========================== */
.adfit-section {
    padding: var(--space-xl) 0;
}

.adfit-section .adfit-container,
.adfit-container {
    display: flex;
    justify-content: center;
    align-items: center;
    padding: var(--space-md);
    background: rgba(0, 0, 0, 0.15);
    border-radius: 16px;
    margin: 0 auto;
}

/* PC용 광고 (728x90) */
.adfit-pc {
    display: flex;
    max-width: 760px;
    min-height: 120px;
}

/* 모바일용 광고 (320x50) */
.adfit-mobile {
    display: none;
    max-width: 350px;
    min-height: 80px;
}

.adfit-section .adfit-container ins,
.adfit-container ins {
    display: block !important;
}

/* 반응형 - 768px 이하에서 모바일 광고 표시 */
@media (max-width: 768px) {
    .adfit-pc {
        display: none;
    }
    .adfit-mobile {
        display: flex;
    }
}

/* ===========================
   Responsive Design
   =========================== */
@media (max-width: 1024px) {
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .feature-card-wide {
        grid-column: span 2;
    }

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

    .rag-process {
        flex-wrap: wrap;
    }

    .rag-arrow {
        display: none;
    }

    .rag-step {
        flex: 0 0 calc(50% - var(--space-md));
    }

    .category-areas {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 1024px) {
    .hero.hero-with-chat {
        flex-direction: column;
        padding-top: calc(var(--space-3xl) + 40px);
        gap: var(--space-xl);
    }

    .hero.hero-with-chat .hero-content {
        max-width: 100%;
        padding-right: 0;
        text-align: center;
    }

    .hero.hero-with-chat .hero-chat {
        max-width: 600px;
        width: 100%;
    }

    .hero.hero-with-chat .hero-trust {
        justify-content: center;
    }

    .hero.hero-with-chat .hero-ai-notice {
        text-align: left;
    }

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

@media (max-width: 768px) {
    :root {
        --container-padding: 1rem;
    }

    .nav-links, .nav-cta {
        display: none;
    }

    .nav-links.active {
        display: flex;
        position: fixed;
        top: 60px;
        left: 0;
        right: 0;
        height: calc(100vh - 60px);
        height: calc(100dvh - 60px);
        flex-direction: column;
        background: rgba(10, 15, 26, 0.98);
        backdrop-filter: blur(20px);
        padding: 2rem;
        padding-bottom: 100px;
        gap: 0.5rem;
        z-index: 99;
        overflow-y: auto;
        -webkit-overflow-scrolling: touch;
    }

    .nav-links.active .nav-link {
        padding: 1rem;
        font-size: 1.1rem;
        border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    }

    .nav-links.active .nav-divider {
        display: none;
    }

    /* 스크롤 후 nav가 작아졌을 때 메뉴 위치 조정 */
    .nav.scrolled .nav-links.active {
        top: 52px;
        height: calc(100vh - 52px);
        height: calc(100dvh - 52px);
    }

    .nav-mobile-toggle {
        display: flex;
    }

    .nav-mobile-toggle.active span:first-child {
        transform: rotate(45deg) translate(5px, 5px);
    }

    .nav-mobile-toggle.active span:last-child {
        transform: rotate(-45deg) translate(5px, -5px);
    }

    /* 모바일에서 채팅창 크기 고정 (가로 너비 유지) */
    .hero.hero-with-chat .hero-chat {
        max-width: 600px;
        width: 100%;
    }

    .hero-chat .chat-messages {
        min-height: 320px;
        max-height: 400px;
    }

    .hero-chat .chat-container.chat-expanded .chat-messages {
        min-height: 320px;
        max-height: 400px;
    }

    /* fullwidth 모드에서도 가로 너비 고정 */
    .hero.hero-with-chat.chat-fullwidth .hero-chat {
        max-width: 600px;
    }

    .hero.hero-with-chat.chat-fullwidth .chat-messages {
        min-height: 400px;
        max-height: 500px;
    }

    /* 모바일에서 분야 선택 버튼 스타일 */
    .category-select {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--space-xs);
    }

    .category-btn {
        padding: var(--space-sm) var(--space-xs);
        gap: 4px;
    }

    .category-btn i {
        width: 20px;
        height: 20px;
    }

    .category-name {
        font-size: 0.8125rem;
    }

    .category-desc {
        font-size: 0.6875rem;
    }

    .hero-content {
        max-width: 100%;
        text-align: center;
        padding: 0 var(--container-padding);
    }

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

    .disclaimer-content {
        flex-direction: column;
        text-align: center;
    }

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

    .feature-card-wide {
        grid-column: span 1;
    }

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

    .rag-step {
        flex: 0 0 100%;
    }

    .category-areas {
        grid-template-columns: 1fr;
    }

    .area-topics {
        grid-template-columns: 1fr;
    }

    .disclaimer-box {
        flex-direction: column;
        text-align: center;
    }

    .message-content {
        max-width: 85%;
    }

    /* 모바일에서 "나", "AI" 아바타 숨김 */
    .message-avatar {
        display: none;
    }

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

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

    .footer-links {
        grid-template-columns: 1fr;
        gap: var(--space-lg);
    }

    .footer-bottom {
        flex-direction: column;
        text-align: center;
    }

    .hero-areas {
        gap: var(--space-xs);
    }

    .area-badge {
        font-size: 0.6875rem;
        padding: 0.25rem 0.5rem;
    }
}

@media (max-width: 480px) {
    .section-title {
        font-size: 1.75rem;
    }

    .welcome-examples {
        flex-direction: column;
    }

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

/* Prefers Reduced Motion */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }

    .badge-dot, .status-dot {
        animation: none;
    }
}