/**
 * style.css - 메인 스타일시트
 * 짧은 영어 명언 - Cosmic Theme (Spotify Inspired Dark Mode)
 * 위치: /assets/css/style.css
 */

/* ============================================
   CSS Custom Properties (Variables)
   ============================================ */
:root {
    /* Cosmic Color Palette */
    --color-cosmic-black: #0d0d0d;
    --color-cosmic-dark: #121212;
    --color-cosmic-darker: #181818;
    --color-cosmic-gray: #282828;
    --color-cosmic-light: #3e3e3e;

    /* Primary Colors - Spotify Green + Cosmic */
    --color-primary: #1DB954;
    --color-primary-dark: #1aa34a;
    --color-primary-light: #1ed760;
    --color-primary-glow: rgba(29, 185, 84, 0.4);

    /* Accent Colors - Cosmic Purple/Blue */
    --color-accent: #667eea;
    --color-accent-secondary: #764ba2;
    --color-accent-glow: rgba(102, 126, 234, 0.4);

    /* Nebula Colors */
    --color-nebula-purple: #9b59b6;
    --color-nebula-blue: #3498db;
    --color-nebula-pink: #e91e63;
    --color-nebula-cyan: #00bcd4;

    /* Text Colors */
    --color-text-primary: #ffffff;
    --color-text-secondary: #b3b3b3;
    --color-text-muted: #6a6a6a;
    --color-text-inverse: #000000;

    /* Background Colors */
    --bg-primary: var(--color-cosmic-dark);
    --bg-secondary: var(--color-cosmic-darker);
    --bg-card: var(--color-cosmic-gray);
    --bg-card-hover: var(--color-cosmic-light);

    /* Gradients */
    --gradient-cosmic: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --gradient-nebula: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    --gradient-aurora: linear-gradient(135deg, #00c9ff 0%, #92fe9d 100%);
    --gradient-dark: linear-gradient(180deg, rgba(0,0,0,0.8) 0%, rgba(0,0,0,0) 100%);

    /* Spacing */
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;
    --spacing-2xl: 48px;
    --spacing-3xl: 64px;

    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    --radius-2xl: 24px;
    --radius-full: 9999px;

    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.5);
    --shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.6);
    --shadow-glow: 0 0 30px var(--color-primary-glow);
    --shadow-cosmic: 0 0 60px var(--color-accent-glow);

    /* Typography */
    --font-primary: 'Inter', 'Noto Sans KR', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-display: 'Playfair Display', Georgia, serif;
    --font-mono: 'Fira Code', 'Monaco', monospace;

    /* Font Sizes */
    --text-xs: 0.75rem;
    --text-sm: 0.875rem;
    --text-base: 1rem;
    --text-lg: 1.125rem;
    --text-xl: 1.25rem;
    --text-2xl: 1.5rem;
    --text-3xl: 1.875rem;
    --text-4xl: 2.25rem;
    --text-5xl: 3rem;
    --text-6xl: 3.75rem;

    /* Line Heights */
    --leading-tight: 1.25;
    --leading-normal: 1.5;
    --leading-relaxed: 1.75;

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-normal: 300ms ease;
    --transition-slow: 500ms ease;

    /* Z-Index */
    --z-dropdown: 100;
    --z-sticky: 200;
    --z-fixed: 300;
    --z-modal-backdrop: 400;
    --z-modal: 500;
    --z-popover: 600;
    --z-tooltip: 700;
    --z-loading: 1000;

    /* Layout */
    --header-height: 70px;
    --container-max: 1400px;
    --sidebar-width: 280px;
}

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

html {
    font-size: 16px;
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: var(--font-primary);
    font-size: var(--text-base);
    line-height: var(--leading-normal);
    color: var(--color-text-primary);
    background-color: var(--bg-primary);
    min-height: 100vh;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Focus Styles */
:focus {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

:focus:not(:focus-visible) {
    outline: none;
}

:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

/* Selection */
::selection {
    background-color: var(--color-primary);
    color: var(--color-text-inverse);
}

/* Scrollbar - Spotify Style */
::-webkit-scrollbar {
    width: 12px;
    height: 12px;
}

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

::-webkit-scrollbar-thumb {
    background: var(--color-cosmic-light);
    border-radius: var(--radius-full);
    border: 3px solid var(--bg-secondary);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--color-text-muted);
}

/* ============================================
   Typography
   ============================================ */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: var(--leading-tight);
    color: var(--color-text-primary);
}

h1 { font-size: var(--text-5xl); }
h2 { font-size: var(--text-4xl); }
h3 { font-size: var(--text-3xl); }
h4 { font-size: var(--text-2xl); }
h5 { font-size: var(--text-xl); }
h6 { font-size: var(--text-lg); }

p {
    margin-bottom: var(--spacing-md);
    color: var(--color-text-secondary);
}

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

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

strong, b {
    font-weight: 600;
}

em, i {
    font-style: italic;
}

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

.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

.skip-link {
    position: absolute;
    top: -100%;
    left: 50%;
    transform: translateX(-50%);
    padding: var(--spacing-md) var(--spacing-lg);
    background: var(--color-primary);
    color: var(--color-text-inverse);
    font-weight: 600;
    border-radius: var(--radius-md);
    z-index: var(--z-tooltip);
    transition: top var(--transition-fast);
}

.skip-link:focus {
    top: var(--spacing-md);
}

/* ============================================
   Loading Screen
   ============================================ */
.loading-screen {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--bg-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: var(--z-loading);
    transition: opacity 0.5s ease, visibility 0.5s ease;
}

.loading-screen.hidden {
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
}

.loading-content {
    text-align: center;
    position: relative;
}

.loading-nebula {
    position: absolute;
    width: 300px;
    height: 300px;
    background: var(--gradient-cosmic);
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.3;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    animation: nebulaPulse 3s ease-in-out infinite;
}

.loading-stars {
    position: absolute;
    width: 200px;
    height: 200px;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}

.loading-logo {
    position: relative;
    z-index: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-md);
}

.loading-icon {
    font-size: 4rem;
    animation: iconFloat 2s ease-in-out infinite;
}

.loading-text {
    font-size: var(--text-2xl);
    font-weight: 700;
    background: var(--gradient-cosmic);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.loading-bar {
    width: 200px;
    height: 4px;
    background: var(--bg-card);
    border-radius: var(--radius-full);
    overflow: hidden;
    margin-top: var(--spacing-lg);
}

.loading-progress {
    width: 0%;
    height: 100%;
    background: var(--gradient-cosmic);
    animation: loadProgress 2s ease-in-out forwards;
}

@keyframes nebulaPulse {
    0%, 100% { transform: translate(-50%, -50%) scale(1); opacity: 0.3; }
    50% { transform: translate(-50%, -50%) scale(1.2); opacity: 0.5; }
}

@keyframes iconFloat {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}

@keyframes loadProgress {
    0% { width: 0%; }
    50% { width: 70%; }
    100% { width: 100%; }
}

/* ============================================
   Background Effects
   ============================================ */
.bg-effects {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: -1;
    overflow: hidden;
}

.cosmic-canvas {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}

.nebula-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(ellipse at 20% 80%, rgba(102, 126, 234, 0.15) 0%, transparent 50%),
                radial-gradient(ellipse at 80% 20%, rgba(118, 75, 162, 0.15) 0%, transparent 50%),
                radial-gradient(ellipse at 50% 50%, rgba(233, 30, 99, 0.08) 0%, transparent 50%);
    animation: nebulaMove 30s ease-in-out infinite;
}

.star-field {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image:
        radial-gradient(1px 1px at 10% 10%, rgba(255,255,255,0.8), transparent),
        radial-gradient(1px 1px at 20% 30%, rgba(255,255,255,0.6), transparent),
        radial-gradient(1px 1px at 40% 60%, rgba(255,255,255,0.9), transparent),
        radial-gradient(2px 2px at 60% 20%, rgba(255,255,255,0.7), transparent),
        radial-gradient(1px 1px at 80% 70%, rgba(255,255,255,0.5), transparent),
        radial-gradient(1px 1px at 90% 40%, rgba(255,255,255,0.8), transparent);
    background-size: 200px 200px;
    animation: starTwinkle 5s ease-in-out infinite;
}

@keyframes nebulaMove {
    0%, 100% { transform: translate(0, 0) rotate(0deg); }
    50% { transform: translate(-20px, 20px) rotate(5deg); }
}

@keyframes starTwinkle {
    0%, 100% { opacity: 0.5; }
    50% { opacity: 1; }
}

/* ============================================
   Header
   ============================================ */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: var(--header-height);
    background: rgba(18, 18, 18, 0.9);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    z-index: var(--z-sticky);
    transition: all var(--transition-normal);
}

.site-header.scrolled {
    background: rgba(18, 18, 18, 0.98);
    box-shadow: var(--shadow-lg);
}

.header-container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--spacing-xl);
}

/* Logo */
.site-logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-weight: 700;
    font-size: var(--text-xl);
    color: var(--color-text-primary);
    text-decoration: none;
    transition: transform var(--transition-fast);
}

.site-logo:hover {
    transform: scale(1.02);
    color: var(--color-text-primary);
}

.logo-icon {
    font-size: 1.5rem;
    filter: drop-shadow(0 0 10px var(--color-primary-glow));
}

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

/* Main Navigation */
.main-nav {
    flex: 1;
    display: flex;
    justify-content: center;
}

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

.nav-item {
    position: relative;
}

.nav-link {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    color: var(--color-text-secondary);
    font-weight: 500;
    font-size: var(--text-sm);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

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

.nav-icon {
    font-size: var(--text-lg);
}

/* Submenu */
.has-submenu > .nav-link::after {
    content: '';
    border: 4px solid transparent;
    border-top-color: currentColor;
    margin-left: var(--spacing-xs);
    margin-top: 2px;
}

.submenu {
    position: absolute;
    top: 100%;
    left: 0;
    min-width: 180px;
    padding: var(--spacing-sm);
    background: var(--bg-secondary);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
    list-style: none;
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: all var(--transition-fast);
}

.has-submenu:hover .submenu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.submenu li a {
    display: block;
    padding: var(--spacing-sm) var(--spacing-md);
    color: var(--color-text-secondary);
    font-size: var(--text-sm);
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
}

.submenu li a:hover {
    color: var(--color-text-primary);
    background: var(--bg-card);
}

/* Header Actions */
.header-actions {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.search-toggle,
.mobile-menu-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: transparent;
    border: none;
    border-radius: var(--radius-full);
    color: var(--color-text-secondary);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.search-toggle:hover,
.mobile-menu-toggle:hover {
    background: var(--bg-card);
    color: var(--color-text-primary);
}

.search-icon {
    font-size: var(--text-lg);
}

/* Hamburger Menu */
.hamburger {
    display: flex;
    flex-direction: column;
    gap: 5px;
    width: 20px;
}

.hamburger span {
    display: block;
    height: 2px;
    background: currentColor;
    border-radius: var(--radius-full);
    transition: all var(--transition-fast);
}

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

.mobile-menu-toggle.active .hamburger span:nth-child(2) {
    opacity: 0;
}

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

.mobile-menu-toggle {
    display: none;
}

/* Search Panel */
.search-panel {
    position: absolute;
    top: 100%;
    left: 0;
    width: 100%;
    padding: var(--spacing-lg);
    background: var(--bg-secondary);
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all var(--transition-fast);
}

.search-panel.active {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.search-form {
    max-width: 600px;
    margin: 0 auto;
}

.search-input-wrapper {
    display: flex;
    gap: var(--spacing-sm);
}

.search-input {
    flex: 1;
    padding: var(--spacing-md) var(--spacing-lg);
    background: var(--bg-card);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-full);
    color: var(--color-text-primary);
    font-size: var(--text-base);
    outline: none;
    transition: all var(--transition-fast);
}

.search-input::placeholder {
    color: var(--color-text-muted);
}

.search-input:focus {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px var(--color-primary-glow);
}

.search-submit {
    padding: var(--spacing-md) var(--spacing-lg);
    background: var(--color-primary);
    border: none;
    border-radius: var(--radius-full);
    color: var(--color-text-inverse);
    font-size: var(--text-lg);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.search-submit:hover {
    background: var(--color-primary-light);
    transform: scale(1.05);
}

.search-suggestions {
    margin-top: var(--spacing-md);
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: var(--text-sm);
}

.suggestion-label {
    color: var(--color-text-muted);
}

.search-suggestions a {
    padding: var(--spacing-xs) var(--spacing-sm);
    background: var(--bg-card);
    border-radius: var(--radius-full);
    color: var(--color-text-secondary);
    font-size: var(--text-xs);
    transition: all var(--transition-fast);
}

.search-suggestions a:hover {
    background: var(--color-primary);
    color: var(--color-text-inverse);
}

/* ============================================
   Mobile Navigation
   ============================================ */
.mobile-nav {
    position: fixed;
    top: 0;
    right: -100%;
    width: 100%;
    max-width: 320px;
    height: 100%;
    background: var(--bg-secondary);
    z-index: var(--z-modal);
    transition: right var(--transition-normal);
    overflow-y: auto;
}

.mobile-nav.active {
    right: 0;
}

.mobile-nav-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-lg);
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.mobile-nav-logo {
    font-weight: 700;
    font-size: var(--text-lg);
}

.mobile-nav-close {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: transparent;
    border: none;
    color: var(--color-text-secondary);
    font-size: var(--text-xl);
    cursor: pointer;
    border-radius: var(--radius-full);
    transition: all var(--transition-fast);
}

.mobile-nav-close:hover {
    background: var(--bg-card);
    color: var(--color-text-primary);
}

.mobile-nav-list {
    list-style: none;
    padding: var(--spacing-md);
}

.mobile-nav-item {
    margin-bottom: var(--spacing-xs);
}

.mobile-nav-link {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    color: var(--color-text-secondary);
    font-size: var(--text-base);
    font-weight: 500;
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.mobile-nav-link:hover,
.mobile-nav-item.active .mobile-nav-link {
    background: var(--bg-card);
    color: var(--color-text-primary);
}

.mobile-submenu {
    list-style: none;
    padding-left: var(--spacing-2xl);
    margin-top: var(--spacing-xs);
}

.mobile-submenu li a {
    display: block;
    padding: var(--spacing-sm) var(--spacing-md);
    color: var(--color-text-muted);
    font-size: var(--text-sm);
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
}

.mobile-submenu li a:hover {
    color: var(--color-text-primary);
    background: var(--bg-card);
}

.mobile-categories {
    padding: var(--spacing-lg);
    border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.mobile-categories h3 {
    font-size: var(--text-sm);
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: var(--spacing-md);
}

.mobile-categories ul {
    list-style: none;
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
}

.mobile-categories li a {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-xs) var(--spacing-md);
    background: var(--bg-card);
    border-radius: var(--radius-full);
    color: var(--color-text-secondary);
    font-size: var(--text-sm);
    transition: all var(--transition-fast);
}

.mobile-categories li a:hover {
    background: var(--color-primary);
    color: var(--color-text-inverse);
}

.mobile-nav-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    z-index: var(--z-modal-backdrop);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-normal);
}

.mobile-nav-overlay.active {
    opacity: 1;
    visibility: visible;
}

/* ============================================
   Main Content
   ============================================ */
.site-main {
    min-height: calc(100vh - var(--header-height));
    padding-top: var(--header-height);
}

/* ============================================
   Section Styles
   ============================================ */
.section {
    padding: var(--spacing-3xl) 0;
}

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-2xl);
}

.section-title {
    font-size: var(--text-4xl);
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    background: var(--gradient-cosmic);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

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

/* ============================================
   Quote Card Styles
   ============================================ */
.quote-card {
    position: relative;
    background: var(--bg-card);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    margin-bottom: var(--spacing-lg);
    border: 1px solid rgba(255, 255, 255, 0.05);
    transition: all var(--transition-normal);
    overflow: hidden;
}

.quote-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--gradient-cosmic);
    opacity: 0;
    transition: opacity var(--transition-normal);
}

.quote-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-cosmic);
    border-color: rgba(102, 126, 234, 0.3);
}

.quote-card:hover::before {
    opacity: 0.05;
}

.quote-card--featured {
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.1) 0%, rgba(118, 75, 162, 0.1) 100%);
    border-color: rgba(102, 126, 234, 0.2);
}

.quote-card--large {
    padding: var(--spacing-2xl);
}

.quote-card--large .quote-english {
    font-size: var(--text-3xl);
}

.quote-rank {
    position: absolute;
    top: var(--spacing-md);
    left: var(--spacing-md);
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-full);
    font-weight: 700;
    font-size: var(--text-sm);
    color: var(--color-text-primary);
}

.rank-number {
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.5);
}

.quote-category {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-xs) var(--spacing-md);
    background: rgba(255, 255, 255, 0.05);
    border-radius: var(--radius-full);
    font-size: var(--text-sm);
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-md);
}

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

.quote-text {
    position: relative;
    z-index: 1;
    margin: 0;
    padding: 0;
}

.quote-english {
    font-family: var(--font-display);
    font-size: var(--text-2xl);
    font-weight: 600;
    line-height: var(--leading-relaxed);
    color: var(--color-text-primary);
    margin-bottom: var(--spacing-md);
}

.quote-korean {
    font-size: var(--text-base);
    color: var(--color-text-secondary);
    line-height: var(--leading-relaxed);
}

.quote-author {
    position: relative;
    z-index: 1;
    margin-top: var(--spacing-lg);
    padding-top: var(--spacing-md);
    border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.quote-author cite {
    font-style: normal;
    color: var(--color-primary);
    font-weight: 500;
}

.author-korean {
    color: var(--color-text-muted);
    font-weight: 400;
}

.quote-actions {
    position: relative;
    z-index: 1;
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
}

.like-btn,
.share-btn,
.copy-btn {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    background: rgba(255, 255, 255, 0.05);
    border: none;
    border-radius: var(--radius-full);
    color: var(--color-text-secondary);
    font-size: var(--text-sm);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.like-btn:hover,
.share-btn:hover,
.copy-btn:hover {
    background: rgba(255, 255, 255, 0.1);
    color: var(--color-text-primary);
}

.like-btn.liked {
    background: rgba(233, 30, 99, 0.1);
    color: var(--color-nebula-pink);
}

.like-btn.liked .like-icon {
    animation: likeHeart 0.5s ease;
}

@keyframes likeHeart {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.3); }
}

/* ============================================
   Quote Grid
   ============================================ */
.quotes-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: var(--spacing-lg);
}

.quotes-masonry {
    columns: 3;
    column-gap: var(--spacing-lg);
}

.quotes-masonry .quote-card {
    break-inside: avoid;
    margin-bottom: var(--spacing-lg);
}

/* ============================================
   Buttons
   ============================================ */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-xl);
    font-family: var(--font-primary);
    font-size: var(--text-base);
    font-weight: 600;
    text-decoration: none;
    border: none;
    border-radius: var(--radius-full);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.btn-primary {
    background: var(--color-primary);
    color: var(--color-text-inverse);
}

.btn-primary:hover {
    background: var(--color-primary-light);
    transform: scale(1.02);
    box-shadow: var(--shadow-glow);
    color: var(--color-text-inverse);
}

.btn-secondary {
    background: transparent;
    color: var(--color-text-primary);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.3);
    color: var(--color-text-primary);
}

.btn-cosmic {
    background: var(--gradient-cosmic);
    color: var(--color-text-primary);
}

.btn-cosmic:hover {
    box-shadow: var(--shadow-cosmic);
    transform: scale(1.02);
    color: var(--color-text-primary);
}

.btn-lg {
    padding: var(--spacing-lg) var(--spacing-2xl);
    font-size: var(--text-lg);
}

.btn-sm {
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: var(--text-sm);
}

/* ============================================
   Forms
   ============================================ */
.form-group {
    margin-bottom: var(--spacing-lg);
}

.form-label {
    display: block;
    margin-bottom: var(--spacing-sm);
    font-weight: 500;
    color: var(--color-text-primary);
}

.form-input,
.form-textarea,
.form-select {
    width: 100%;
    padding: var(--spacing-md) var(--spacing-lg);
    background: var(--bg-card);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-lg);
    color: var(--color-text-primary);
    font-family: var(--font-primary);
    font-size: var(--text-base);
    transition: all var(--transition-fast);
}

.form-input:focus,
.form-textarea:focus,
.form-select:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px var(--color-primary-glow);
}

.form-input::placeholder,
.form-textarea::placeholder {
    color: var(--color-text-muted);
}

.form-textarea {
    min-height: 150px;
    resize: vertical;
}

/* ============================================
   Footer
   ============================================ */
.site-footer {
    background: var(--bg-secondary);
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    padding: var(--spacing-3xl) 0 var(--spacing-xl);
}

.footer-container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

.footer-top {
    display: grid;
    grid-template-columns: 1.5fr 2fr;
    gap: var(--spacing-3xl);
    padding-bottom: var(--spacing-2xl);
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

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

.footer-logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: var(--text-xl);
    font-weight: 700;
    color: var(--color-text-primary);
}

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

.footer-tagline {
    color: var(--color-text-muted);
    margin: 0;
}

.footer-stats {
    display: flex;
    gap: var(--spacing-xl);
    margin-top: var(--spacing-md);
}

.footer-stats .stat-item {
    display: flex;
    flex-direction: column;
}

.footer-stats .stat-number {
    font-size: var(--text-2xl);
    font-weight: 700;
    color: var(--color-primary);
}

.footer-stats .stat-label {
    font-size: var(--text-sm);
    color: var(--color-text-muted);
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-xl);
}

.footer-column h4 {
    font-size: var(--text-sm);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--color-text-primary);
    margin-bottom: var(--spacing-md);
}

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

.footer-column li {
    margin-bottom: var(--spacing-sm);
}

.footer-column a {
    color: var(--color-text-muted);
    font-size: var(--text-sm);
    transition: color var(--transition-fast);
}

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

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

.copyright {
    font-size: var(--text-sm);
    color: var(--color-text-muted);
    margin: 0;
}

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

.social-link {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-card);
    border-radius: var(--radius-full);
    font-size: var(--text-lg);
    transition: all var(--transition-fast);
}

.social-link:hover {
    background: var(--color-primary);
    transform: translateY(-3px);
}

/* ============================================
   Toast Notifications
   ============================================ */
.toast-container {
    position: fixed;
    bottom: var(--spacing-xl);
    right: var(--spacing-xl);
    z-index: var(--z-tooltip);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.toast {
    padding: var(--spacing-md) var(--spacing-xl);
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    border: 1px solid rgba(255, 255, 255, 0.1);
    box-shadow: var(--shadow-xl);
    color: var(--color-text-primary);
    font-size: var(--text-sm);
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    animation: toastIn 0.3s ease;
}

.toast.success {
    border-color: var(--color-primary);
}

.toast.error {
    border-color: var(--color-nebula-pink);
}

.toast.hiding {
    animation: toastOut 0.3s ease forwards;
}

@keyframes toastIn {
    from {
        opacity: 0;
        transform: translateX(100px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes toastOut {
    from {
        opacity: 1;
        transform: translateX(0);
    }
    to {
        opacity: 0;
        transform: translateX(100px);
    }
}

/* ============================================
   Back to Top Button
   ============================================ */
.back-to-top {
    position: fixed;
    bottom: var(--spacing-xl);
    right: var(--spacing-xl);
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-cosmic);
    border: none;
    border-radius: var(--radius-full);
    color: var(--color-text-primary);
    font-size: var(--text-xl);
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: all var(--transition-normal);
    z-index: var(--z-fixed);
    box-shadow: var(--shadow-cosmic);
}

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

.back-to-top:hover {
    transform: translateY(-5px);
}

/* ============================================
   Pagination
   ============================================ */
.quotes-pagination {
    margin-top: var(--spacing-2xl);
}

.pagination-list {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: var(--spacing-sm);
    list-style: none;
}

.pagination-list li a {
    display: flex;
    align-items: center;
    justify-content: center;
    min-width: 40px;
    height: 40px;
    padding: 0 var(--spacing-md);
    background: var(--bg-card);
    border-radius: var(--radius-md);
    color: var(--color-text-secondary);
    font-size: var(--text-sm);
    font-weight: 500;
    transition: all var(--transition-fast);
}

.pagination-list li a:hover,
.pagination-list li a.active {
    background: var(--color-primary);
    color: var(--color-text-inverse);
}

.pagination-ellipsis {
    color: var(--color-text-muted);
}

/* ============================================
   Category Tags
   ============================================ */
.category-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-xl);
}

.category-tag {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--bg-card);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-full);
    color: var(--color-text-secondary);
    font-size: var(--text-sm);
    font-weight: 500;
    transition: all var(--transition-fast);
}

.category-tag:hover,
.category-tag.active {
    background: var(--color-primary);
    border-color: var(--color-primary);
    color: var(--color-text-inverse);
}

/* ============================================
   Cards and Panels
   ============================================ */
.panel {
    background: var(--bg-card);
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
}

.panel-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--spacing-lg);
    padding-bottom: var(--spacing-md);
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.panel-title {
    font-size: var(--text-xl);
    font-weight: 600;
}

/* ============================================
   Stats Cards
   ============================================ */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-lg);
}

.stat-card {
    background: var(--bg-card);
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    text-align: center;
    transition: all var(--transition-normal);
}

.stat-card:hover {
    transform: translateY(-5px);
    border-color: rgba(102, 126, 234, 0.3);
    box-shadow: var(--shadow-cosmic);
}

.stat-card-icon {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-md);
}

.stat-card-number {
    font-size: var(--text-4xl);
    font-weight: 700;
    color: var(--color-primary);
    margin-bottom: var(--spacing-xs);
}

.stat-card-label {
    font-size: var(--text-sm);
    color: var(--color-text-muted);
}

/* ============================================
   Empty State
   ============================================ */
.empty-state {
    text-align: center;
    padding: var(--spacing-3xl);
}

.empty-state-icon {
    font-size: 4rem;
    margin-bottom: var(--spacing-lg);
    opacity: 0.5;
}

.empty-state-title {
    font-size: var(--text-2xl);
    margin-bottom: var(--spacing-md);
}

.empty-state-text {
    color: var(--color-text-muted);
    margin-bottom: var(--spacing-xl);
}