/*
 * style.css - 100문 100답 플랫폼 메인 스타일시트
 * 궁금하면클릭해봐용 - Cosmic Theme
 * 위치: /assets/css/style.css
 */

@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+KR:wght@300;400;500;600;700;900&family=Orbitron:wght@400;500;600;700;900&display=swap');

:root {
    /* Cosmic Color Scheme */
    --primary: #667eea;
    --primary-dark: #5a67d8;
    --secondary: #764ba2;
    --accent: #f093fb;
    --accent-alt: #ed6ea0;
    --cosmic-blue: #4facfe;
    --cosmic-purple: #9d4edd;
    --cosmic-pink: #f72585;
    --cosmic-cyan: #00f5ff;
    --cosmic-gold: #ffd700;

    /* Background */
    --bg-dark: #0d0d1a;
    --bg-darker: #050510;
    --bg-card: rgba(13, 13, 26, 0.8);
    --bg-glass: rgba(255, 255, 255, 0.05);

    /* Text */
    --text-white: #ffffff;
    --text-light: #e0e0e0;
    --text-muted: #a0a0a0;
    --text-dark: #333333;

    /* Gradients */
    --gradient-cosmic: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --gradient-aurora: linear-gradient(135deg, #f093fb 0%, #f5576c 50%, #4facfe 100%);
    --gradient-nebula: linear-gradient(135deg, #0d0d1a 0%, #1a1a3e 50%, #0d0d1a 100%);
    --gradient-stardust: linear-gradient(135deg, #ffecd2 0%, #fcb69f 50%, #ee9ca7 100%);

    /* Shadows */
    --shadow-glow: 0 0 40px rgba(102, 126, 234, 0.3);
    --shadow-cosmic: 0 10px 40px rgba(118, 75, 162, 0.4);
    --shadow-soft: 0 4px 20px rgba(0, 0, 0, 0.3);

    /* Border */
    --border-glass: 1px solid rgba(255, 255, 255, 0.1);
    --border-glow: 1px solid rgba(102, 126, 234, 0.5);

    /* Spacing */
    --spacing-xs: 8px;
    --spacing-sm: 16px;
    --spacing-md: 24px;
    --spacing-lg: 40px;
    --spacing-xl: 60px;
    --spacing-2xl: 100px;

    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 16px;
    --radius-lg: 24px;
    --radius-full: 50px;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Noto Sans KR', -apple-system, BlinkMacSystemFont, sans-serif;
    color: var(--text-white);
    background: var(--bg-darker);
    line-height: 1.7;
    overflow-x: hidden;
    min-height: 100vh;
}

/* ========== COSMIC BACKGROUND ========== */
.cosmic-bg {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    background: var(--gradient-nebula);
    overflow: hidden;
}

.cosmic-bg::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle at 20% 80%, rgba(102, 126, 234, 0.15) 0%, transparent 40%),
                radial-gradient(circle at 80% 20%, rgba(118, 75, 162, 0.15) 0%, transparent 40%),
                radial-gradient(circle at 40% 40%, rgba(240, 147, 251, 0.1) 0%, transparent 30%);
    animation: cosmicRotate 60s linear infinite;
}

@keyframes cosmicRotate {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

/* Star particles */
.stars {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    pointer-events: none;
}

/* ========== CONTAINER ========== */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

.container-fluid {
    width: 100%;
    padding: 0 var(--spacing-md);
}

/* ========== TYPOGRAPHY ========== */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.3;
    margin-bottom: var(--spacing-sm);
}

h1 {
    font-size: clamp(2rem, 5vw, 3.5rem);
    background: var(--gradient-cosmic);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

h2 {
    font-size: clamp(1.5rem, 4vw, 2.5rem);
}

h3 {
    font-size: clamp(1.25rem, 3vw, 1.75rem);
}

p {
    margin-bottom: var(--spacing-sm);
    color: var(--text-light);
}

a {
    color: var(--primary);
    text-decoration: none;
    transition: all 0.3s ease;
}

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

/* ========== SITE HEADER ========== */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background: rgba(13, 13, 26, 0.9);
    backdrop-filter: blur(20px);
    border-bottom: var(--border-glass);
    transition: all 0.3s ease;
}

.site-header.scrolled {
    box-shadow: var(--shadow-soft);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 70px;
    padding: 0 var(--spacing-md);
    max-width: 1400px;
    margin: 0 auto;
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.logo img {
    height: 40px;
    width: auto;
}

.logo-text {
    font-family: 'Orbitron', monospace;
    font-size: 1.2rem;
    font-weight: 700;
    background: var(--gradient-cosmic);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* ========== NAVIGATION ========== */
.main-nav {
    display: flex;
    align-items: center;
}

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

.main-nav li {
    position: relative;
}

.main-nav a {
    color: var(--text-light);
    font-weight: 500;
    font-size: 0.95rem;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-sm);
    transition: all 0.3s ease;
}

.main-nav a:hover,
.main-nav a.active {
    color: var(--text-white);
    background: var(--bg-glass);
}

/* Mobile Menu Toggle */
.menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    padding: 10px;
}

.menu-toggle span {
    width: 25px;
    height: 2px;
    background: var(--text-white);
    transition: all 0.3s ease;
}

/* ========== MAIN CONTENT ========== */
.site-main {
    min-height: calc(100vh - 70px);
    padding-top: 70px;
}

/* ========== HERO SECTION ========== */
.hero-section {
    min-height: calc(100vh - 70px);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    padding: var(--spacing-xl) var(--spacing-md);
    text-align: center;
}

.hero-content {
    max-width: 900px;
    position: relative;
    z-index: 10;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: 8px 20px;
    background: var(--bg-glass);
    border: var(--border-glass);
    border-radius: var(--radius-full);
    margin-bottom: var(--spacing-lg);
    animation: fadeInDown 0.8s ease-out;
}

.hero-badge span {
    font-size: 0.85rem;
    color: var(--accent);
    font-weight: 500;
}

.hero-title {
    font-family: 'Orbitron', monospace;
    font-size: clamp(2.5rem, 8vw, 5rem);
    font-weight: 900;
    margin-bottom: var(--spacing-md);
    animation: fadeInUp 0.8s ease-out 0.2s both;
}

.hero-title .highlight {
    display: block;
    background: var(--gradient-aurora);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-muted);
    margin-bottom: var(--spacing-lg);
    animation: fadeInUp 0.8s ease-out 0.4s both;
}

/* ========== BUTTONS ========== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
    padding: 14px 32px;
    font-size: 1rem;
    font-weight: 600;
    border-radius: var(--radius-full);
    border: none;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    text-decoration: none;
}

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

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 40px rgba(102, 126, 234, 0.5);
}

.btn-secondary {
    background: var(--bg-glass);
    color: var(--text-white);
    border: var(--border-glass);
}

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

.btn-outline {
    background: transparent;
    color: var(--primary);
    border: 2px solid var(--primary);
}

.btn-outline:hover {
    background: var(--primary);
    color: var(--text-white);
}

.btn-glow {
    animation: btnGlow 2s ease-in-out infinite;
}

@keyframes btnGlow {
    0%, 100% { box-shadow: 0 0 20px rgba(102, 126, 234, 0.4); }
    50% { box-shadow: 0 0 40px rgba(102, 126, 234, 0.6); }
}

/* ========== CARDS ========== */
.card {
    background: var(--bg-card);
    backdrop-filter: blur(10px);
    border: var(--border-glass);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.card:hover {
    transform: translateY(-10px);
    border-color: rgba(102, 126, 234, 0.3);
    box-shadow: var(--shadow-cosmic);
}

.card-glass {
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.1) 0%, rgba(255, 255, 255, 0.05) 100%);
}

/* ========== TEMPLATE CARDS (100문 100답) ========== */
.template-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: var(--spacing-md);
    padding: var(--spacing-lg) 0;
}

.template-card {
    position: relative;
    background: var(--bg-card);
    border: var(--border-glass);
    border-radius: var(--radius-lg);
    overflow: hidden;
    cursor: pointer;
    transition: all 0.4s ease;
}

.template-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: var(--gradient-cosmic);
    transform: scaleX(0);
    transition: transform 0.4s ease;
}

.template-card:hover::before {
    transform: scaleX(1);
}

.template-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-cosmic);
}

.template-header {
    padding: var(--spacing-md);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.template-number {
    width: 50px;
    height: 50px;
    background: var(--gradient-cosmic);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: 'Orbitron', monospace;
    font-weight: 700;
    font-size: 1.2rem;
}

.template-title {
    flex: 1;
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-white);
}

.template-stats {
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--bg-glass);
    display: flex;
    justify-content: space-around;
    border-top: var(--border-glass);
}

.stat-item {
    text-align: center;
}

.stat-value {
    font-family: 'Orbitron', monospace;
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--accent);
}

.stat-label {
    font-size: 0.75rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 1px;
}

/* ========== SEARCH BOX ========== */
.search-container {
    max-width: 600px;
    margin: 0 auto var(--spacing-xl);
}

.search-box {
    display: flex;
    align-items: center;
    background: var(--bg-card);
    border: var(--border-glass);
    border-radius: var(--radius-full);
    padding: 8px 8px 8px 24px;
    transition: all 0.3s ease;
}

.search-box:focus-within {
    border-color: var(--primary);
    box-shadow: var(--shadow-glow);
}

.search-box input {
    flex: 1;
    background: none;
    border: none;
    outline: none;
    color: var(--text-white);
    font-size: 1rem;
    padding: 10px;
}

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

.search-box button {
    background: var(--gradient-cosmic);
    border: none;
    border-radius: var(--radius-full);
    padding: 12px 24px;
    color: var(--text-white);
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
}

.search-box button:hover {
    transform: scale(1.05);
}

/* ========== SECTION STYLES ========== */
.section {
    padding: var(--spacing-2xl) 0;
}

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

.section-badge {
    display: inline-block;
    padding: 6px 16px;
    background: var(--bg-glass);
    border: var(--border-glass);
    border-radius: var(--radius-full);
    font-size: 0.85rem;
    color: var(--accent);
    margin-bottom: var(--spacing-sm);
}

.section-title {
    font-size: clamp(1.75rem, 4vw, 2.5rem);
    margin-bottom: var(--spacing-sm);
}

.section-desc {
    color: var(--text-muted);
    max-width: 600px;
    margin: 0 auto;
}

/* ========== FOOTER ========== */
.site-footer {
    background: rgba(5, 5, 16, 0.95);
    backdrop-filter: blur(10px);
    border-top: var(--border-glass);
    padding: var(--spacing-xl) 0 var(--spacing-lg);
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

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

.footer-brand .logo-text {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-sm);
}

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

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

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

.footer-links li {
    margin-bottom: var(--spacing-xs);
}

.footer-links a {
    color: var(--text-muted);
    font-size: 0.9rem;
}

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

.footer-bottom {
    text-align: center;
    padding-top: var(--spacing-lg);
    border-top: var(--border-glass);
    color: var(--text-muted);
    font-size: 0.85rem;
}

/* ========== FORM ELEMENTS ========== */
.form-group {
    margin-bottom: var(--spacing-md);
}

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

.form-input {
    width: 100%;
    padding: 14px 18px;
    background: var(--bg-card);
    border: var(--border-glass);
    border-radius: var(--radius-md);
    color: var(--text-white);
    font-size: 1rem;
    transition: all 0.3s ease;
}

.form-input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.2);
}

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

/* ========== TAGS ========== */
.tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-xs);
}

.tag {
    padding: 6px 14px;
    background: var(--bg-glass);
    border: var(--border-glass);
    border-radius: var(--radius-full);
    font-size: 0.85rem;
    color: var(--text-light);
    transition: all 0.3s ease;
    cursor: pointer;
}

.tag:hover {
    background: var(--primary);
    color: var(--text-white);
    border-color: var(--primary);
}

.tag.active {
    background: var(--gradient-cosmic);
    color: var(--text-white);
    border-color: transparent;
}

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

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

.mt-1 { margin-top: var(--spacing-xs); }
.mt-2 { margin-top: var(--spacing-sm); }
.mt-3 { margin-top: var(--spacing-md); }
.mt-4 { margin-top: var(--spacing-lg); }
.mt-5 { margin-top: var(--spacing-xl); }

.mb-1 { margin-bottom: var(--spacing-xs); }
.mb-2 { margin-bottom: var(--spacing-sm); }
.mb-3 { margin-bottom: var(--spacing-md); }
.mb-4 { margin-bottom: var(--spacing-lg); }
.mb-5 { margin-bottom: var(--spacing-xl); }

.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;
}

/* ========== ANIMATIONS ========== */
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeInDown {
    from {
        opacity: 0;
        transform: translateY(-30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes slideInLeft {
    from {
        opacity: 0;
        transform: translateX(-50px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translateX(50px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.05); }
}

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

.animate-fadeIn { animation: fadeIn 0.6s ease-out; }
.animate-fadeInUp { animation: fadeInUp 0.6s ease-out; }
.animate-fadeInDown { animation: fadeInDown 0.6s ease-out; }
.animate-slideInLeft { animation: slideInLeft 0.6s ease-out; }
.animate-slideInRight { animation: slideInRight 0.6s ease-out; }
.animate-pulse { animation: pulse 2s ease-in-out infinite; }
.animate-float { animation: float 3s ease-in-out infinite; }

/* Stagger animation delays */
.delay-1 { animation-delay: 0.1s; }
.delay-2 { animation-delay: 0.2s; }
.delay-3 { animation-delay: 0.3s; }
.delay-4 { animation-delay: 0.4s; }
.delay-5 { animation-delay: 0.5s; }