/* =====================================================
   영등포 보도블럭 시공 - 메인 스타일시트
   다크모드 기본 / 라이트모드 토글 지원
   모바일 앱 스타일 UI
   ===================================================== */

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

/* ========== CSS Variables (Dark Mode Default) ========== */
:root {
    /* Dark Mode Colors */
    --bg-primary: #181A1B;
    --bg-secondary: #23272B;
    --bg-tertiary: #2D3135;
    --bg-card: #1E2124;

    --text-primary: #FFFFFF;
    --text-secondary: #B0B3B8;
    --text-muted: #6E7681;

    --accent-primary: #4EB1F7;
    --accent-secondary: #FFD700;
    --accent-mint: #20C997;
    --accent-orange: #FF8C42;

    --border-color: rgba(255, 255, 255, 0.1);
    --shadow-color: rgba(0, 0, 0, 0.3);

    /* Common */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-xl: 30px;
    --radius-full: 50px;

    --transition: all 0.3s ease;
    --font-family: 'Noto Sans KR', -apple-system, BlinkMacSystemFont, sans-serif;
}

/* ========== Light Mode ========== */
[data-theme="light"] {
    --bg-primary: #F9F9F9;
    --bg-secondary: #FFFFFF;
    --bg-tertiary: #F0F2F5;
    --bg-card: #FFFFFF;

    --text-primary: #222222;
    --text-secondary: #555555;
    --text-muted: #888888;

    --border-color: rgba(0, 0, 0, 0.1);
    --shadow-color: rgba(0, 0, 0, 0.1);
}

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

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

body {
    font-family: var(--font-family);
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    transition: var(--transition);
    min-height: 100vh;
    padding-bottom: 70px; /* Bottom nav space */
}

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

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

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

ul, ol {
    list-style: none;
}

button {
    cursor: pointer;
    font-family: inherit;
    border: none;
    background: none;
}

/* ========== App Header ========== */
.app-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 60px;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 16px;
    z-index: 1000;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

.app-logo {
    display: flex;
    align-items: center;
    gap: 10px;
}

.app-logo-icon {
    width: 36px;
    height: 36px;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-mint));
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
}

.app-logo-text {
    font-size: 16px;
    font-weight: 700;
    color: var(--text-primary);
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 12px;
}

/* Theme Toggle */
.theme-toggle {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: var(--bg-tertiary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    transition: var(--transition);
    border: 1px solid var(--border-color);
}

.theme-toggle:hover {
    background: var(--accent-primary);
    color: #fff;
    transform: scale(1.1);
}

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

[data-theme="light"] .theme-toggle .icon-sun { display: block; }
[data-theme="light"] .theme-toggle .icon-moon { display: none; }

/* ========== Main Content ========== */
.main-content {
    padding-top: 60px;
    min-height: 100vh;
}

/* ========== Hero Section ========== */
.hero-section {
    position: relative;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    padding: 80px 20px 40px;
    background: linear-gradient(180deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
    overflow: hidden;
}

.hero-bg-pattern {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image:
        radial-gradient(circle at 20% 30%, rgba(78, 177, 247, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 70%, rgba(32, 201, 151, 0.1) 0%, transparent 50%);
    pointer-events: none;
}

.hero-content {
    position: relative;
    z-index: 10;
    text-align: center;
    max-width: 800px;
    animation: fadeInUp 0.8s ease-out;
}

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

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    padding: 8px 16px;
    border-radius: var(--radius-full);
    margin-bottom: 24px;
    font-size: 14px;
    color: var(--accent-primary);
}

.hero-title {
    font-size: clamp(32px, 8vw, 56px);
    font-weight: 900;
    line-height: 1.2;
    margin-bottom: 20px;
    color: #FFFFFF;
    text-shadow:
        0 0 10px rgba(78, 177, 247, 0.8),
        0 0 20px rgba(78, 177, 247, 0.6),
        0 0 40px rgba(78, 177, 247, 0.4),
        0 2px 4px rgba(0, 0, 0, 0.5);
    letter-spacing: -0.02em;
}

.hero-description {
    font-size: 16px;
    color: var(--text-secondary);
    margin-bottom: 32px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.hero-cta-group {
    display: flex;
    flex-direction: column;
    gap: 12px;
    align-items: center;
}

@media (min-width: 480px) {
    .hero-cta-group {
        flex-direction: row;
        justify-content: center;
    }
}

/* ========== Buttons ========== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 14px 28px;
    border-radius: var(--radius-full);
    font-size: 15px;
    font-weight: 600;
    transition: var(--transition);
    min-width: 160px;
}

.btn-primary {
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-mint));
    color: #fff;
    box-shadow: 0 4px 20px rgba(78, 177, 247, 0.4);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 30px rgba(78, 177, 247, 0.5);
    color: #fff;
}

.btn-secondary {
    background: var(--bg-tertiary);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.btn-secondary:hover {
    background: var(--accent-primary);
    color: #fff;
    border-color: var(--accent-primary);
}

.btn-gold {
    background: linear-gradient(135deg, var(--accent-secondary), var(--accent-orange));
    color: #1a1a1a;
    box-shadow: 0 4px 20px rgba(255, 215, 0, 0.4);
}

.btn-gold:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 30px rgba(255, 215, 0, 0.5);
    color: #1a1a1a;
}

/* ========== Section Styles ========== */
.section {
    padding: 60px 20px;
}

.section-header {
    text-align: center;
    margin-bottom: 40px;
}

.section-title {
    font-size: clamp(24px, 5vw, 32px);
    font-weight: 700;
    margin-bottom: 12px;
    color: var(--text-primary);
}

.section-subtitle {
    font-size: 15px;
    color: var(--text-secondary);
}

/* ========== Feature Cards ========== */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 20px;
    max-width: 1200px;
    margin: 0 auto;
}

.feature-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 28px;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--accent-primary), var(--accent-mint));
    opacity: 0;
    transition: var(--transition);
}

.feature-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 40px var(--shadow-color);
    border-color: var(--accent-primary);
}

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

.feature-icon {
    width: 56px;
    height: 56px;
    background: linear-gradient(135deg, rgba(78, 177, 247, 0.2), rgba(32, 201, 151, 0.2));
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 28px;
    margin-bottom: 16px;
}

.feature-title {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 10px;
    color: var(--text-primary);
}

.feature-desc {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.7;
}

/* ========== Stats Section ========== */
.stats-section {
    background: var(--bg-secondary);
    padding: 50px 20px;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    gap: 30px;
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

.stat-item {
    padding: 20px;
}

.stat-number {
    font-size: 36px;
    font-weight: 900;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-mint));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 8px;
}

.stat-label {
    font-size: 13px;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 1px;
}

/* ========== Process Section ========== */
.process-list {
    max-width: 800px;
    margin: 0 auto;
}

.process-item {
    display: flex;
    gap: 20px;
    margin-bottom: 30px;
    position: relative;
}

.process-item:not(:last-child)::after {
    content: '';
    position: absolute;
    left: 23px;
    top: 56px;
    width: 2px;
    height: calc(100% - 20px);
    background: linear-gradient(180deg, var(--accent-primary), transparent);
}

.process-number {
    width: 48px;
    height: 48px;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-mint));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    font-weight: 700;
    color: #fff;
    flex-shrink: 0;
}

.process-content {
    flex: 1;
    padding-top: 4px;
}

.process-title {
    font-size: 17px;
    font-weight: 700;
    margin-bottom: 6px;
    color: var(--text-primary);
}

.process-desc {
    font-size: 14px;
    color: var(--text-secondary);
}

/* ========== Portfolio Gallery ========== */
.portfolio-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 16px;
    max-width: 1200px;
    margin: 0 auto;
}

.portfolio-card {
    position: relative;
    border-radius: var(--radius-lg);
    overflow: hidden;
    aspect-ratio: 4/3;
    background: var(--bg-tertiary);
}

.portfolio-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition);
}

.portfolio-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, transparent 40%, rgba(0, 0, 0, 0.9) 100%);
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    padding: 20px;
    opacity: 0;
    transition: var(--transition);
}

.portfolio-card:hover .portfolio-overlay {
    opacity: 1;
}

.portfolio-card:hover .portfolio-image {
    transform: scale(1.1);
}

.portfolio-title {
    font-size: 16px;
    font-weight: 600;
    color: #fff;
    margin-bottom: 4px;
}

.portfolio-location {
    font-size: 13px;
    color: rgba(255, 255, 255, 0.7);
}

/* ========== Review Section ========== */
.review-slider {
    max-width: 800px;
    margin: 0 auto;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
    -ms-overflow-style: none;
    padding: 10px 0;
}

.review-slider::-webkit-scrollbar {
    display: none;
}

.review-track {
    display: flex;
    gap: 16px;
    padding: 0 20px;
}

.review-card {
    flex: 0 0 300px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 24px;
}

.review-stars {
    color: var(--accent-secondary);
    font-size: 16px;
    margin-bottom: 12px;
}

.review-text {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 16px;
}

.review-author {
    display: flex;
    align-items: center;
    gap: 12px;
}

.review-avatar {
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-mint));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 16px;
    font-weight: 600;
    color: #fff;
}

.review-name {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-primary);
}

.review-date {
    font-size: 12px;
    color: var(--text-muted);
}

/* ========== Contact Section ========== */
.contact-section {
    background: var(--bg-secondary);
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 30px;
    max-width: 1000px;
    margin: 0 auto;
}

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

.contact-info-list {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 16px;
    background: var(--bg-card);
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
}

.contact-icon {
    width: 48px;
    height: 48px;
    background: linear-gradient(135deg, rgba(78, 177, 247, 0.2), rgba(32, 201, 151, 0.2));
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 22px;
}

.contact-label {
    font-size: 13px;
    color: var(--text-muted);
    margin-bottom: 2px;
}

.contact-value {
    font-size: 15px;
    font-weight: 600;
    color: var(--text-primary);
}

/* ========== Footer ========== */
.app-footer {
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    padding: 40px 20px 100px;
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
}

.footer-top {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 30px;
    margin-bottom: 30px;
}

.footer-brand {
    margin-bottom: 16px;
}

.footer-brand-name {
    font-size: 18px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.footer-brand-desc {
    font-size: 13px;
    color: var(--text-secondary);
}

.footer-title {
    font-size: 14px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 16px;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.footer-links {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.footer-link {
    font-size: 14px;
    color: var(--text-secondary);
    transition: var(--transition);
}

.footer-link:hover {
    color: var(--accent-primary);
    padding-left: 5px;
}

.footer-bottom {
    padding-top: 30px;
    border-top: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    gap: 16px;
    align-items: center;
    text-align: center;
}

@media (min-width: 768px) {
    .footer-bottom {
        flex-direction: row;
        justify-content: space-between;
        text-align: left;
    }
}

.footer-copyright {
    font-size: 13px;
    color: var(--text-muted);
}

.footer-legal-links {
    display: flex;
    gap: 20px;
}

.footer-legal-link {
    font-size: 13px;
    color: var(--text-muted);
}

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

/* ========== Bottom Navigation (App Style) ========== */
.bottom-nav {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    height: 70px;
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-around;
    padding: 0 10px;
    z-index: 1000;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

.nav-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
    padding: 8px 16px;
    color: var(--text-muted);
    transition: var(--transition);
    border-radius: var(--radius-md);
}

.nav-item:hover,
.nav-item.active {
    color: var(--accent-primary);
    background: rgba(78, 177, 247, 0.1);
}

.nav-icon {
    font-size: 22px;
}

.nav-label {
    font-size: 11px;
    font-weight: 500;
}

/* ========== Floating Action Button ========== */
.fab {
    position: fixed;
    bottom: 85px;
    right: 20px;
    width: 56px;
    height: 56px;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-mint));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    color: #fff;
    box-shadow: 0 4px 20px rgba(78, 177, 247, 0.4);
    z-index: 999;
    transition: var(--transition);
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% {
        box-shadow: 0 4px 20px rgba(78, 177, 247, 0.4);
    }
    50% {
        box-shadow: 0 4px 30px rgba(78, 177, 247, 0.6);
    }
}

.fab:hover {
    transform: scale(1.1);
    color: #fff;
}

/* ========== Forms ========== */
.form-group {
    margin-bottom: 20px;
}

.form-label {
    display: block;
    font-size: 14px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.form-input,
.form-textarea,
.form-select {
    width: 100%;
    padding: 14px 16px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: 15px;
    color: var(--text-primary);
    transition: var(--transition);
    font-family: inherit;
}

.form-input:focus,
.form-textarea:focus,
.form-select:focus {
    outline: none;
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px rgba(78, 177, 247, 0.2);
}

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

.form-textarea {
    min-height: 120px;
    resize: vertical;
}

/* ========== Auth Pages ========== */
.auth-container {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    background: var(--bg-primary);
}

.auth-card {
    width: 100%;
    max-width: 400px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    padding: 40px 30px;
}

.auth-header {
    text-align: center;
    margin-bottom: 30px;
}

.auth-logo {
    width: 64px;
    height: 64px;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-mint));
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 32px;
    margin: 0 auto 20px;
}

.auth-title {
    font-size: 24px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.auth-subtitle {
    font-size: 14px;
    color: var(--text-secondary);
}

.auth-footer {
    margin-top: 24px;
    text-align: center;
    font-size: 14px;
    color: var(--text-secondary);
}

.auth-footer a {
    color: var(--accent-primary);
    font-weight: 600;
}

.auth-divider {
    display: flex;
    align-items: center;
    gap: 16px;
    margin: 24px 0;
    color: var(--text-muted);
    font-size: 13px;
}

.auth-divider::before,
.auth-divider::after {
    content: '';
    flex: 1;
    height: 1px;
    background: var(--border-color);
}

/* ========== Alert Messages ========== */
.alert {
    padding: 14px 18px;
    border-radius: var(--radius-md);
    font-size: 14px;
    margin-bottom: 20px;
}

.alert-error {
    background: rgba(239, 68, 68, 0.1);
    border: 1px solid rgba(239, 68, 68, 0.3);
    color: #ef4444;
}

.alert-success {
    background: rgba(34, 197, 94, 0.1);
    border: 1px solid rgba(34, 197, 94, 0.3);
    color: #22c55e;
}

.alert-warning {
    background: rgba(245, 158, 11, 0.1);
    border: 1px solid rgba(245, 158, 11, 0.3);
    color: #f59e0b;
}

/* ========== Utilities ========== */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

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

.mt-1 { margin-top: 8px; }
.mt-2 { margin-top: 16px; }
.mt-3 { margin-top: 24px; }
.mt-4 { margin-top: 32px; }

.mb-1 { margin-bottom: 8px; }
.mb-2 { margin-bottom: 16px; }
.mb-3 { margin-bottom: 24px; }
.mb-4 { margin-bottom: 32px; }

.hidden { display: none !important; }

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

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

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

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

/* ========== Loading Spinner ========== */
.spinner {
    width: 40px;
    height: 40px;
    border: 3px solid var(--border-color);
    border-top-color: var(--accent-primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

/* ========== Map Container ========== */
.map-container {
    width: 100%;
    height: 300px;
    border-radius: var(--radius-lg);
    overflow: hidden;
    border: 1px solid var(--border-color);
}

.map-container iframe {
    width: 100%;
    height: 100%;
    border: none;
}

/* ========== Responsive Adjustments ========== */
@media (max-width: 768px) {
    .section {
        padding: 40px 16px;
    }

    .section-title {
        font-size: 22px;
    }

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

    .auth-card {
        padding: 30px 20px;
    }
}

@media (max-width: 480px) {
    .app-header {
        height: 56px;
        padding: 0 12px;
    }

    .main-content {
        padding-top: 56px;
    }

    .hero-section {
        padding: 60px 16px 30px;
    }

    .bottom-nav {
        height: 65px;
    }

    body {
        padding-bottom: 65px;
    }

    .fab {
        bottom: 80px;
        right: 16px;
        width: 52px;
        height: 52px;
    }
}

/* ========== Fancy Visual Effects ========== */

/* Animated Gradient Background */
.gradient-bg {
    background: linear-gradient(-45deg, #1a1c2e, #2d1f3d, #1f2d3d, #1a2e2d);
    background-size: 400% 400%;
    animation: gradientShift 15s ease infinite;
}

@keyframes gradientShift {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

/* Glow Effect for Accent Elements */
.glow-effect {
    box-shadow: 0 0 20px rgba(78, 177, 247, 0.3),
                0 0 40px rgba(78, 177, 247, 0.2),
                0 0 60px rgba(78, 177, 247, 0.1);
}

/* Shimmer Animation for Cards */
.shimmer {
    position: relative;
    overflow: hidden;
}

.shimmer::after {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 50%;
    height: 100%;
    background: linear-gradient(90deg,
        transparent,
        rgba(255, 255, 255, 0.05),
        transparent);
    animation: shimmer 3s infinite;
}

@keyframes shimmer {
    0% { left: -100%; }
    100% { left: 200%; }
}

/* Floating Animation */
.float {
    animation: float 6s ease-in-out infinite;
}

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

/* Scale Up on Hover */
.hover-scale {
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.hover-scale:hover {
    transform: scale(1.03);
}

/* Card Tilt Effect */
.tilt-card {
    transition: transform 0.3s ease;
    transform-style: preserve-3d;
}

.tilt-card:hover {
    transform: perspective(1000px) rotateX(2deg) rotateY(-2deg);
}

/* Neon Glow Text */
.neon-text {
    text-shadow:
        0 0 5px var(--accent-primary),
        0 0 10px var(--accent-primary),
        0 0 20px var(--accent-primary);
}

/* Glass Morphism Card */
.glass-card {
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

/* Gradient Border */
.gradient-border {
    position: relative;
    background: var(--bg-card);
    border-radius: var(--radius-lg);
}

.gradient-border::before {
    content: '';
    position: absolute;
    inset: -2px;
    border-radius: calc(var(--radius-lg) + 2px);
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-mint), var(--accent-orange));
    z-index: -1;
    opacity: 0;
    transition: opacity 0.3s ease;
}

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

/* Particle Background Effect */
.particles {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    overflow: hidden;
    z-index: 0;
}

.particle {
    position: absolute;
    width: 4px;
    height: 4px;
    background: var(--accent-primary);
    border-radius: 50%;
    opacity: 0.3;
    animation: particleFloat 20s infinite;
}

@keyframes particleFloat {
    0%, 100% {
        transform: translateY(100vh) rotate(0deg);
        opacity: 0;
    }
    10% {
        opacity: 0.3;
    }
    90% {
        opacity: 0.3;
    }
    100% {
        transform: translateY(-100vh) rotate(720deg);
        opacity: 0;
    }
}

/* Ripple Effect */
.ripple {
    position: relative;
    overflow: hidden;
}

.ripple::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    transform: translate(-50%, -50%);
    transition: width 0.5s, height 0.5s;
}

.ripple:active::after {
    width: 300px;
    height: 300px;
}

/* Fancy Stats Counter */
.stat-number {
    font-size: 48px;
    font-weight: 900;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-mint));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* Animated Underline */
.animated-underline {
    position: relative;
    display: inline-block;
}

.animated-underline::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--accent-primary), var(--accent-mint));
    transition: width 0.3s ease;
}

.animated-underline:hover::after {
    width: 100%;
}

/* Slide In Animation */
.slide-in-left {
    animation: slideInLeft 0.6s ease-out;
}

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

.slide-in-right {
    animation: slideInRight 0.6s ease-out;
}

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

.slide-in-up {
    animation: slideInUp 0.6s ease-out;
}

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

/* Bounce Effect */
.bounce {
    animation: bounce 2s ease infinite;
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% { transform: translateY(0); }
    40% { transform: translateY(-10px); }
    60% { transform: translateY(-5px); }
}

/* Glowing Border Animation */
.glow-border {
    position: relative;
}

.glow-border::before {
    content: '';
    position: absolute;
    inset: -3px;
    border-radius: inherit;
    background: linear-gradient(45deg,
        var(--accent-primary),
        var(--accent-mint),
        var(--accent-orange),
        var(--accent-primary));
    background-size: 300% 300%;
    animation: glowRotate 4s linear infinite;
    z-index: -1;
    opacity: 0.7;
    filter: blur(8px);
}

@keyframes glowRotate {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

/* Hero Section Enhanced */
.hero-section {
    position: relative;
}

.hero-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(78, 177, 247, 0.15) 0%, transparent 70%);
    pointer-events: none;
    z-index: 0;
}

/* Enhanced Feature Card Hover */
.feature-card {
    position: relative;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.feature-card::before {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: var(--radius-lg);
    background: linear-gradient(135deg,
        rgba(78, 177, 247, 0.1),
        rgba(32, 201, 151, 0.1));
    opacity: 0;
    transition: opacity 0.3s ease;
}

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

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

/* Typewriter Effect Helper */
.typewriter {
    overflow: hidden;
    white-space: nowrap;
    animation: typing 3s steps(30, end);
}

@keyframes typing {
    from { width: 0; }
    to { width: 100%; }
}

/* Morphing Background Shapes */
.morph-bg {
    position: absolute;
    width: 200px;
    height: 200px;
    border-radius: 60% 40% 30% 70% / 60% 30% 70% 40%;
    background: linear-gradient(135deg,
        rgba(78, 177, 247, 0.3),
        rgba(32, 201, 151, 0.3));
    animation: morph 8s ease-in-out infinite;
    filter: blur(30px);
    pointer-events: none;
}

@keyframes morph {
    0%, 100% {
        border-radius: 60% 40% 30% 70% / 60% 30% 70% 40%;
    }
    50% {
        border-radius: 30% 60% 70% 40% / 50% 60% 30% 60%;
    }
}

/* Ripple Effect */
.btn, .nav-item {
    position: relative;
    overflow: hidden;
}

.ripple-effect {
    position: absolute;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.3);
    transform: scale(0);
    animation: rippleAnimation 0.6s ease-out;
    pointer-events: none;
}

@keyframes rippleAnimation {
    to {
        transform: scale(2);
        opacity: 0;
    }
}

/* Enhanced Button Glow */
.btn-primary {
    position: relative;
}

.btn-primary::before {
    content: '';
    position: absolute;
    inset: -2px;
    border-radius: inherit;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-mint));
    z-index: -1;
    opacity: 0;
    filter: blur(10px);
    transition: opacity 0.3s ease;
}

.btn-primary:hover::before {
    opacity: 0.6;
}

/* Gradient Text */
.gradient-text {
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-mint));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* ========== Hero Slider ========== */
.hero-slider-section {
    position: relative;
    width: 100%;
    margin-top: 60px;
    overflow: hidden;
}

.slider-container {
    position: relative;
    width: 100%;
    height: 60vh;
    min-height: 400px;
    max-height: 600px;
    overflow: hidden;
}

@media (max-width: 768px) {
    .slider-container {
        height: 50vh;
        min-height: 300px;
    }
}

.slider-wrapper {
    display: flex;
    width: 100%;
    height: 100%;
    transition: transform 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

.slider-wrapper.fade .slide {
    position: absolute;
    top: 0;
    left: 0;
    opacity: 0;
    transition: opacity 0.8s ease;
}

.slider-wrapper.fade .slide.active {
    opacity: 1;
    z-index: 1;
}

.slider-wrapper.zoom .slide {
    position: absolute;
    top: 0;
    left: 0;
    opacity: 0;
    transform: scale(1.1);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

.slider-wrapper.zoom .slide.active {
    opacity: 1;
    transform: scale(1);
    z-index: 1;
}

.slider-wrapper.flip {
    perspective: 1000px;
}

.slider-wrapper.flip .slide {
    position: absolute;
    top: 0;
    left: 0;
    opacity: 0;
    transform: rotateY(90deg);
    transition: opacity 0.6s ease, transform 0.6s ease;
    backface-visibility: hidden;
}

.slider-wrapper.flip .slide.active {
    opacity: 1;
    transform: rotateY(0);
    z-index: 1;
}

.slide {
    flex-shrink: 0;
    width: 100%;
    height: 100%;
    position: relative;
    overflow: hidden;
}

.slide-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 8s ease;
}

.slide.active .slide-image {
    transform: scale(1.05);
}

.slide-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(
        to bottom,
        rgba(0, 0, 0, 0.2) 0%,
        rgba(0, 0, 0, 0.1) 50%,
        rgba(0, 0, 0, 0.6) 100%
    );
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    padding: 40px;
}

@media (max-width: 768px) {
    .slide-overlay {
        padding: 24px;
    }
}

.slide-content {
    max-width: 800px;
    animation: slideUp 0.8s ease;
}

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

.slide-title {
    font-size: clamp(24px, 5vw, 40px);
    font-weight: 700;
    color: #fff;
    margin-bottom: 12px;
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.5);
}

.slide-description {
    font-size: clamp(14px, 2.5vw, 18px);
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 20px;
    text-shadow: 0 1px 5px rgba(0, 0, 0, 0.5);
}

.slide-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 24px;
    background: var(--accent-primary);
    color: #fff;
    border-radius: var(--radius-full);
    font-weight: 600;
    transition: all 0.3s ease;
}

.slide-link:hover {
    background: var(--accent-mint);
    transform: translateX(5px);
    color: #fff;
}

/* 슬라이더 화살표 */
.slider-arrow {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 50px;
    height: 50px;
    background: rgba(0, 0, 0, 0.5);
    border: none;
    border-radius: 50%;
    color: #fff;
    font-size: 20px;
    cursor: pointer;
    transition: all 0.3s ease;
    z-index: 10;
    backdrop-filter: blur(5px);
}

.slider-arrow:hover {
    background: var(--accent-primary);
    transform: translateY(-50%) scale(1.1);
}

.slider-prev {
    left: 20px;
}

.slider-next {
    right: 20px;
}

@media (max-width: 768px) {
    .slider-arrow {
        width: 40px;
        height: 40px;
        font-size: 16px;
    }
    .slider-prev { left: 10px; }
    .slider-next { right: 10px; }
}

/* 슬라이더 도트 */
.slider-dots {
    position: absolute;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 10px;
    z-index: 10;
}

.slider-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.5);
    border: none;
    cursor: pointer;
    transition: all 0.3s ease;
}

.slider-dot:hover {
    background: rgba(255, 255, 255, 0.8);
}

.slider-dot.active {
    background: var(--accent-primary);
    transform: scale(1.2);
    box-shadow: 0 0 10px var(--accent-primary);
}

/* 슬라이더 프로그레스 바 */
.slider-progress {
    position: absolute;
    bottom: 0;
    left: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--accent-primary), var(--accent-mint));
    width: 0%;
    transition: width 0.1s linear;
    z-index: 10;
}

/* 로딩 상태 */
.slider-loading {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    height: 100%;
    background: var(--bg-secondary);
}

/* 슬라이더 없을 때 숨김 */
.hero-slider-section.hidden {
    display: none;
}

/* 관리자 링크 */
.slider-admin-link {
    position: absolute;
    top: 10px;
    right: 10px;
    padding: 8px 16px;
    background: rgba(0, 0, 0, 0.7);
    color: #fff;
    border-radius: var(--radius-md);
    font-size: 12px;
    z-index: 20;
    opacity: 0.5;
    transition: opacity 0.3s ease;
}

.slider-admin-link:hover {
    opacity: 1;
    color: #fff;
}