/* ============================================
   KSchool Langley - Main Stylesheet
   Aesthetic: Clean Korean editorial, warm & trustworthy
   ============================================ */

:root {
    --color-primary:    #1a3a5c;   /* 깊은 남색 */
    --color-accent:     #c8932a;   /* 따뜻한 금색 */
    --color-accent-lt:  #e8b84b;
    --color-bg:         #faf9f6;   /* 따뜻한 흰색 */
    --color-bg-alt:     #f2ede6;
    --color-text:       #1c1c1c;
    --color-text-muted: #6b6b6b;
    --color-border:     #e0d8cc;
    --color-white:      #ffffff;
    --color-red:        #c0392b;

    --font-serif: 'DM Serif Display', 'Noto Serif KR', serif;
    --font-sans:  'Noto Sans KR', sans-serif;

    --radius: 4px;
    --radius-lg: 12px;
    --shadow: 0 2px 12px rgba(0,0,0,0.08);
    --shadow-lg: 0 8px 40px rgba(0,0,0,0.12);
    --transition: 0.25s ease;

    --max-width: 1160px;
    --header-h: 72px;
}

/* Reset */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
    font-family: var(--font-sans);
    background: var(--color-bg);
    color: var(--color-text);
    font-size: 16px;
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; }

/* ============================================ HEADER */
.site-header {
    position: fixed;
    top: 0; left: 0; right: 0;
    height: var(--header-h);
    background: rgba(250,249,246,0.96);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--color-border);
    z-index: 1000;
    transition: box-shadow var(--transition);
}
.site-header.scrolled { box-shadow: var(--shadow); }

.header-inner {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 24px;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
}

.logo {
    display: flex;
    flex-direction: column;
    line-height: 1.2;
    flex-shrink: 0;
}
.logo-ko {
    font-family: var(--font-serif);
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--color-primary);
    letter-spacing: 0.02em;
}
.logo-en {
    font-size: 0.65rem;
    color: var(--color-text-muted);
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.main-nav { display: flex; gap: 4px; align-items: center; }
.nav-link {
    padding: 8px 14px;
    font-size: 0.88rem;
    font-weight: 500;
    color: var(--color-text-muted);
    border-radius: var(--radius);
    transition: color var(--transition), background var(--transition);
    white-space: nowrap;
}
.nav-link:hover, .nav-link.active {
    color: var(--color-primary);
    background: var(--color-bg-alt);
}
.nav-link.active { color: var(--color-accent); font-weight: 700; }

.lang-toggle {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    padding: 6px 12px;
    margin-left: 8px;
    font-size: 0.78rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    border: 1.5px solid var(--color-border);
    border-radius: 20px;
    color: var(--color-primary);
    transition: all var(--transition);
    white-space: nowrap;
}
.lang-toggle::before { content: '🌐'; font-size: 0.85rem; }
.lang-toggle:hover {
    background: var(--color-primary);
    border-color: var(--color-primary);
    color: white;
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
}
.nav-toggle span {
    display: block;
    width: 24px; height: 2px;
    background: var(--color-primary);
    transition: var(--transition);
    border-radius: 2px;
}

/* ============================================ MAIN */
.main-content { padding-top: var(--header-h); min-height: 80vh; }

/* ============================================ HERO */
.hero {
    background: var(--color-primary);
    color: var(--color-white);
    padding: 100px 24px 80px;
    position: relative;
    overflow: hidden;
}
.hero::before {
    content: '韓';
    position: absolute;
    right: -40px; top: -60px;
    font-size: 320px;
    font-family: var(--font-serif);
    opacity: 0.04;
    line-height: 1;
    pointer-events: none;
}
.hero-inner {
    max-width: var(--max-width);
    margin: 0 auto;
    position: relative;
    z-index: 1;
}
.hero-badge {
    display: inline-block;
    background: rgba(200,147,42,0.25);
    color: var(--color-accent-lt);
    border: 1px solid rgba(200,147,42,0.4);
    font-size: 0.75rem;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    padding: 6px 14px;
    border-radius: 20px;
    margin-bottom: 24px;
}
.hero h1 {
    font-family: var(--font-serif);
    font-size: clamp(2rem, 4vw, 3.2rem);
    line-height: 1.25;
    margin-bottom: 16px;
    font-weight: 400;
}
.hero h1 em { font-style: italic; color: var(--color-accent-lt); }
.hero-sub {
    font-size: 1.1rem;
    color: rgba(255,255,255,0.7);
    max-width: 520px;
    margin-bottom: 40px;
}
.hero-actions { display: flex; gap: 16px; flex-wrap: wrap; }

/* ============================================ BUTTONS */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 28px;
    font-size: 0.9rem;
    font-weight: 600;
    border-radius: var(--radius);
    transition: all var(--transition);
    cursor: pointer;
    border: 2px solid transparent;
    font-family: var(--font-sans);
    text-decoration: none;
}
.btn-primary {
    background: var(--color-accent);
    color: var(--color-white);
    border-color: var(--color-accent);
}
.btn-primary:hover {
    background: var(--color-accent-lt);
    border-color: var(--color-accent-lt);
    transform: translateY(-1px);
}
.btn-outline {
    background: transparent;
    color: var(--color-white);
    border-color: rgba(255,255,255,0.4);
}
.btn-outline:hover {
    background: rgba(255,255,255,0.1);
    border-color: rgba(255,255,255,0.7);
}
.btn-dark {
    background: var(--color-primary);
    color: var(--color-white);
    border-color: var(--color-primary);
}
.btn-dark:hover { background: #0f2640; transform: translateY(-1px); }

/* ============================================ SECTIONS */
.section { padding: 80px 24px; }
.section-alt { background: var(--color-bg-alt); }

.container { max-width: var(--max-width); margin: 0 auto; }

.section-header { margin-bottom: 48px; }
.section-label {
    display: inline-block;
    font-size: 0.72rem;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--color-accent);
    font-weight: 700;
    margin-bottom: 12px;
}
.section-title {
    font-family: var(--font-serif);
    font-size: clamp(1.5rem, 3vw, 2.2rem);
    color: var(--color-primary);
    font-weight: 400;
    line-height: 1.3;
}
.section-desc {
    margin-top: 14px;
    color: var(--color-text-muted);
    max-width: 560px;
    font-size: 0.95rem;
}

/* ============================================ CARDS */
.card-grid { display: grid; gap: 24px; }
.card-grid-3 { grid-template-columns: repeat(3, 1fr); }
.card-grid-2 { grid-template-columns: repeat(2, 1fr); }
.card-grid-4 { grid-template-columns: repeat(4, 1fr); }

.card {
    background: var(--color-white);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 32px;
    transition: box-shadow var(--transition), transform var(--transition);
}
.card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-3px);
}
.card-icon {
    width: 52px; height: 52px;
    background: var(--color-bg-alt);
    border-radius: 10px;
    display: flex; align-items: center; justify-content: center;
    font-size: 1.5rem;
    margin-bottom: 20px;
}
.card-title {
    font-family: var(--font-serif);
    font-size: 1.15rem;
    color: var(--color-primary);
    margin-bottom: 10px;
}
.card-text { font-size: 0.9rem; color: var(--color-text-muted); line-height: 1.6; }

/* ============================================ STATS */
.stats-bar {
    background: var(--color-accent);
    padding: 40px 24px;
}
.stats-inner {
    max-width: var(--max-width);
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    text-align: center;
}
.stat-num {
    font-family: var(--font-serif);
    font-size: 2.5rem;
    color: var(--color-white);
    line-height: 1;
}
.stat-label {
    font-size: 0.8rem;
    color: rgba(255,255,255,0.8);
    margin-top: 6px;
    letter-spacing: 0.06em;
}

/* ============================================ NOTICE LIST */
.notice-list { display: flex; flex-direction: column; gap: 0; }
.notice-item {
    display: flex;
    align-items: flex-start;
    gap: 16px;
    padding: 20px 0;
    border-bottom: 1px solid var(--color-border);
    text-decoration: none;
    transition: background var(--transition);
}
.notice-item:last-child { border-bottom: none; }
.notice-item:hover .notice-title { color: var(--color-accent); }
.notice-badge {
    flex-shrink: 0;
    font-size: 0.7rem;
    padding: 3px 8px;
    border-radius: 3px;
    font-weight: 700;
    letter-spacing: 0.04em;
    margin-top: 2px;
}
.badge-notice { background: #e8f0fb; color: #1a56db; }
.badge-news   { background: #fef3c7; color: #92400e; }
.badge-event  { background: #f0fdf4; color: #166534; }
.badge-pinned { background: var(--color-primary); color: var(--color-white); }
.notice-title {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--color-text);
    flex: 1;
    transition: color var(--transition);
}
.notice-date {
    flex-shrink: 0;
    font-size: 0.8rem;
    color: var(--color-text-muted);
}

/* ============================================ GALLERY GRID */
.gallery-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: 16px;
}
.gallery-item {
    border-radius: var(--radius-lg);
    overflow: hidden;
    aspect-ratio: 4/3;
    background: var(--color-bg-alt);
    cursor: pointer;
    position: relative;
}
.gallery-item img {
    width: 100%; height: 100%;
    object-fit: cover;
    transition: transform 0.4s ease;
}
.gallery-item:hover img { transform: scale(1.04); }
.gallery-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(to top, rgba(26,58,92,0.7) 0%, transparent 60%);
    opacity: 0;
    transition: opacity var(--transition);
    display: flex;
    align-items: flex-end;
    padding: 16px;
}
.gallery-item:hover .gallery-overlay { opacity: 1; }
.gallery-caption { color: white; font-size: 0.85rem; font-weight: 500; }

/* ============================================ PAGE HEADER */
.page-header {
    background: var(--color-primary);
    padding: 60px 24px 50px;
    color: white;
}
.page-header-inner { max-width: var(--max-width); margin: 0 auto; }
.page-header h1 {
    font-family: var(--font-serif);
    font-size: clamp(1.8rem, 3.5vw, 2.8rem);
    font-weight: 400;
    margin-bottom: 8px;
}
.page-header p { color: rgba(255,255,255,0.7); font-size: 0.95rem; }
.breadcrumb {
    display: flex; gap: 8px; align-items: center;
    font-size: 0.8rem; color: rgba(255,255,255,0.5);
    margin-bottom: 20px;
}
.breadcrumb a { color: rgba(255,255,255,0.6); }
.breadcrumb a:hover { color: var(--color-accent-lt); }
.breadcrumb-sep { opacity: 0.4; }

/* ============================================ FORM */
.form-group { margin-bottom: 20px; }
.form-label {
    display: block;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--color-primary);
    margin-bottom: 8px;
}
.form-label .req { color: var(--color-red); margin-left: 2px; }
.form-input, .form-select, .form-textarea {
    width: 100%;
    padding: 12px 16px;
    border: 1.5px solid var(--color-border);
    border-radius: var(--radius);
    font-family: var(--font-sans);
    font-size: 0.95rem;
    background: var(--color-white);
    color: var(--color-text);
    transition: border-color var(--transition), box-shadow var(--transition);
    -webkit-appearance: none;
}
.form-input:focus, .form-select:focus, .form-textarea:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(26,58,92,0.1);
}
.form-textarea { resize: vertical; min-height: 140px; }
.form-grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }

/* ============================================ ALERT */
.alert {
    padding: 14px 18px;
    border-radius: var(--radius);
    font-size: 0.9rem;
    margin-bottom: 20px;
}
.alert-success { background: #f0fdf4; color: #166534; border: 1px solid #bbf7d0; }
.alert-error   { background: #fef2f2; color: #991b1b; border: 1px solid #fecaca; }

/* ============================================ MAP */
.map-container {
    border-radius: var(--radius-lg);
    overflow: hidden;
    border: 1px solid var(--color-border);
}
.map-container iframe { display: block; width: 100%; }

/* ============================================ PAGINATION */
.pagination {
    display: flex;
    justify-content: center;
    gap: 6px;
    margin-top: 40px;
}
.page-btn {
    width: 40px; height: 40px;
    display: flex; align-items: center; justify-content: center;
    border: 1.5px solid var(--color-border);
    border-radius: var(--radius);
    font-size: 0.9rem;
    color: var(--color-text-muted);
    transition: all var(--transition);
    text-decoration: none;
}
.page-btn:hover { border-color: var(--color-primary); color: var(--color-primary); }
.page-btn.active {
    background: var(--color-primary);
    border-color: var(--color-primary);
    color: white;
    font-weight: 700;
}

/* ============================================ FOOTER */
.site-footer {
    background: #12243a;
    color: rgba(255,255,255,0.7);
    padding: 60px 24px 24px;
}
.footer-inner { max-width: var(--max-width); margin: 0 auto; }
.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1.5fr;
    gap: 48px;
    margin-bottom: 48px;
}
.footer-logo-ko {
    font-family: var(--font-serif);
    font-size: 1.3rem;
    color: white;
    margin-bottom: 4px;
}
.footer-logo-en {
    font-size: 0.75rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: rgba(255,255,255,0.4);
    margin-bottom: 14px;
}
.footer-tagline { font-size: 0.85rem; color: rgba(255,255,255,0.4); }
.footer-links h4, .footer-contact h4 {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-accent-lt);
    margin-bottom: 16px;
    font-weight: 700;
}
.footer-links a {
    display: block;
    font-size: 0.88rem;
    margin-bottom: 10px;
    transition: color var(--transition);
}
.footer-links a:hover { color: white; }
.footer-contact p { font-size: 0.88rem; margin-bottom: 8px; }
.office-hours { color: var(--color-accent-lt) !important; font-weight: 500; }
.footer-bottom {
    border-top: 1px solid rgba(255,255,255,0.08);
    padding-top: 24px;
    font-size: 0.8rem;
    text-align: center;
    color: rgba(255,255,255,0.3);
}

/* ============================================ ADMIN */
.admin-wrap {
    max-width: 960px;
    margin: 0 auto;
    padding: 40px 24px;
}
.admin-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.9rem;
    background: white;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow);
}
.admin-table th {
    background: var(--color-primary);
    color: white;
    padding: 12px 16px;
    text-align: left;
    font-weight: 600;
    font-size: 0.82rem;
    letter-spacing: 0.04em;
}
.admin-table td { padding: 12px 16px; border-bottom: 1px solid var(--color-border); }
.admin-table tr:last-child td { border-bottom: none; }
.admin-table tr:hover td { background: var(--color-bg); }
.admin-nav {
    display: flex;
    gap: 8px;
    margin-bottom: 32px;
    flex-wrap: wrap;
}
.admin-nav a {
    padding: 8px 16px;
    border-radius: var(--radius);
    font-size: 0.88rem;
    font-weight: 500;
    background: var(--color-bg-alt);
    color: var(--color-text-muted);
    transition: all var(--transition);
}
.admin-nav a:hover, .admin-nav a.active {
    background: var(--color-primary);
    color: white;
}

/* ============================================ RESPONSIVE */
@media (max-width: 900px) {
    .card-grid-3, .card-grid-4 { grid-template-columns: repeat(2, 1fr); }
    .stats-inner { grid-template-columns: repeat(2, 1fr); }
    .footer-grid { grid-template-columns: 1fr 1fr; }
    .footer-brand { grid-column: 1 / -1; }
    .form-grid-2 { grid-template-columns: 1fr; }
}

@media (max-width: 640px) {
    .nav-toggle { display: flex; }
    .main-nav {
        display: none;
        position: fixed;
        top: var(--header-h);
        left: 0; right: 0;
        background: var(--color-bg);
        border-bottom: 1px solid var(--color-border);
        padding: 16px 24px;
        flex-direction: column;
        align-items: flex-start;
        gap: 4px;
        box-shadow: var(--shadow);
    }
    .main-nav.open { display: flex; }
    .nav-link { width: 100%; padding: 12px 16px; }

    .card-grid-3, .card-grid-2, .card-grid-4 { grid-template-columns: 1fr; }
    .stats-inner { grid-template-columns: repeat(2, 1fr); gap: 16px; }
    .footer-grid { grid-template-columns: 1fr; gap: 32px; }
    .hero { padding: 60px 24px 50px; }
    .section { padding: 56px 24px; }
}