:root {
    --primary: #2563eb;
    --primary-dark: #1d4ed8;
    --bg: #0f172a;
    --card: #1e293b;
    --card-hover: #334155;
    --text: #f1f5f9;
    --text-muted: #94a3b8;
    --border: #334155;
    --success: #22c55e;
    --danger: #ef4444;
    --radius: 12px;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Noto Sans KR', sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
    min-height: 100vh;
}

a {
    color: inherit;
    text-decoration: none;
}

/* Header */
.header {
    background: #1e293b;
    padding: 2rem 1.5rem;
    text-align: center;
    position: relative;
    overflow: visible;
    border-bottom: 1px solid #334155;
}

.header::before {
    display: none;
    content: none;
}

.header-content {
    position: relative;
    z-index: 1;
    max-width: 1100px;
    margin: 0 auto;
    padding-top: 2.6rem;
}

.header h1 {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.header p {
    color: rgba(255,255,255,0.85);
    font-size: 1.05rem;
}

.header-links {
    position: absolute;
    top: 12px;
    right: 16px;
    z-index: 100;
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
    justify-content: flex-end;
    align-items: center;
    pointer-events: auto;
    max-width: calc(100% - 24px);
}

.header-links a,
.admin-link {
    display: inline-block;
    background: rgba(255,255,255,0.15);
    padding: 0.4rem 0.9rem;
    border-radius: 999px;
    font-size: 0.85rem;
    color: #fff !important;
    transition: background 0.2s;
    white-space: nowrap;
    position: relative;
    z-index: 100;
}

.header-links a:hover,
.admin-link:hover {
    background: rgba(255,255,255,0.25);
}

.header-top { display: none !important; }

/* Container */
.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 2rem 1.5rem;
}

/* Categories */
.categories {
    width: 100%;
    justify-content: flex-start;
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    margin-bottom: 2rem;
}

.cat-btn {
    background: var(--card);
    border: 1px solid var(--border);
    color: var(--text-muted);
    padding: 0.55rem 1.1rem;
    border-radius: 999px;
    font-size: 0.9rem;
    cursor: pointer;
    transition: all 0.2s;
}

.cat-btn:hover, .cat-btn.active {
    background: var(--primary);
    border-color: var(--primary);
    color: white;
}

/* File Grid */
.file-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 1.25rem;
}

.file-card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.25rem;
    transition: all 0.2s;
    display: flex;
    flex-direction: column;
}

.file-card:hover {
    background: var(--card-hover);
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(0,0,0,0.3);
}

.file-title {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 0.4rem;
    word-break: break-word;
}

.file-desc {
    color: var(--text-muted);
    font-size: 0.9rem;
    margin-bottom: 1rem;
    flex-grow: 1;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.file-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-bottom: 1rem;
}

.file-cat {
    background: rgba(37, 99, 235, 0.2);
    color: #93c5fd;
    padding: 0.2rem 0.6rem;
    border-radius: 6px;
    font-size: 0.75rem;
}

.download-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.4rem;
    background: var(--primary);
    color: white;
    padding: 0.6rem 1rem;
    border-radius: 8px;
    font-weight: 500;
    font-size: 0.9rem;
    transition: background 0.2s;
    width: 100%;
}

.download-btn:hover {
    background: var(--primary-dark);
}

.empty {
    text-align: center;
    padding: 4rem 1rem;
    color: var(--text-muted);
}

/* Admin styles */
.admin-header {
    background: var(--card);
    border-bottom: 1px solid var(--border);
    padding: 0.85rem 1.5rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 0.75rem;
}

.admin-nav {
    display: flex;
    flex-wrap: wrap;
    gap: 0.45rem;
    align-items: center;
}

.admin-nav a {
    display: inline-block;
    margin: 0;
    color: var(--text-muted);
    font-size: 0.85rem;
    font-weight: 500;
    padding: 0.45rem 0.9rem;
    border-radius: 8px;
    border: 1px solid transparent;
    transition: all 0.2s;
    white-space: nowrap;
}

.admin-nav a:hover {
    color: var(--text);
    background: rgba(255,255,255,0.06);
    border-color: var(--border);
}

.admin-nav a.active {
    color: #fff;
    background: var(--primary);
    border-color: var(--primary);
}

.card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.5rem;
    margin-bottom: 1.5rem;
}

.form-group {
    margin-bottom: 1.25rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.4rem;
    font-weight: 500;
    font-size: 0.9rem;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 0.7rem 0.9rem;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 8px;
    color: var(--text);
    font-size: 0.95rem;
}

.form-group textarea {
    min-height: 90px;
    resize: vertical;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.65rem 1.2rem;
    border-radius: 8px;
    font-weight: 500;
    font-size: 0.9rem;
    border: none;
    cursor: pointer;
    transition: all 0.2s;
}

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

.btn-primary:hover {
    background: var(--primary-dark);
}

.btn-danger {
    background: var(--danger);
    color: white;
}

.btn-secondary {
    background: var(--card-hover);
    color: var(--text);
}

table {
    width: 100%;
    border-collapse: collapse;
}

th, td {
    padding: 0.85rem 0.75rem;
    text-align: left;
    border-bottom: 1px solid var(--border);
}

th {
    color: var(--text-muted);
    font-weight: 500;
    font-size: 0.85rem;
}

.alert {
    padding: 0.85rem 1rem;
    border-radius: 8px;
    margin-bottom: 1.25rem;
}

.alert-success {
    background: rgba(34, 197, 94, 0.15);
    color: #86efac;
    border: 1px solid rgba(34, 197, 94, 0.3);
}

.alert-error {
    background: rgba(239, 68, 68, 0.15);
    color: #fca5a5;
    border: 1px solid rgba(239, 68, 68, 0.3);
}

.login-box {
    max-width: 400px;
    margin: 5rem auto;
}

@media (max-width: 640px) {
    .header h1 { font-size: 1.5rem; }
    .file-grid { grid-template-columns: 1fr; }
    .admin-header { flex-direction: column; gap: 0.75rem; }
}

/* Logo area */
.logo-area {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1.25rem;
    flex-wrap: wrap;
}

.logo {
    height: 70px;
    width: auto;
    max-width: 220px;
    object-fit: contain;
    background: rgba(255,255,255,0.95);
    padding: 8px 12px;
    border-radius: 10px;
}

/* Access buttons */
.access-buttons {
    display: flex;
    gap: 0.75rem;
    margin-bottom: 1.5rem;
    flex-wrap: wrap;
}

.access-btn {
    flex: 1;
    min-width: 120px;
    text-align: center;
    padding: 0.85rem 1.2rem;
    border-radius: 10px;
    font-weight: 600;
    font-size: 1rem;
    background: var(--card);
    border: 2px solid var(--border);
    transition: all 0.2s;
}

.access-btn:hover {
    border-color: var(--primary);
}

.access-btn.active {
    background: var(--primary);
    border-color: var(--primary);
    color: white;
}

.access-btn.customer.active {
    background: #059669;
    border-color: #059669;
}

.access-btn.employee.active {
    background: #7c3aed;
    border-color: #7c3aed;
}

/* Search */
.search-box {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
    flex-wrap: wrap;
}

.search-box input[type="text"] {
    flex: 1;
    min-width: 200px;
    padding: 0.75rem 1rem;
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 8px;
    color: var(--text);
    font-size: 0.95rem;
}

.search-box button {
    padding: 0.75rem 1.4rem;
    background: var(--primary);
    color: white;
    border: none;
    border-radius: 8px;
    font-weight: 500;
    cursor: pointer;
}

.search-box button:hover {
    background: var(--primary-dark);
}

.clear-search {
    padding: 0.75rem 1rem;
    color: var(--text-muted);
    font-size: 0.9rem;
    align-self: center;
}

/* Badges */
.badge {
    display: inline-block;
    padding: 0.15rem 0.5rem;
    border-radius: 4px;
    font-size: 0.7rem;
    font-weight: 600;
    margin-right: 0.4rem;
}

.badge.customer {
    background: rgba(5, 150, 105, 0.2);
    color: #34d399;
}

.badge.employee {
    background: rgba(124, 58, 237, 0.2);
    color: #c4b5fd;
}

.badge.both {
    background: rgba(37, 99, 235, 0.2);
    color: #93c5fd;
}

/* Archive board table */
.archive-table-wrap {
    overflow-x: auto;
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
}

.archive-table {
    width: 100%;
    border-collapse: collapse;
    table-layout: fixed;
}

.archive-table th,
.archive-table td {
    padding: 0.85rem 0.9rem;
    border-bottom: 1px solid var(--border);
    text-align: left;
    vertical-align: middle;
}

.archive-table th {
    color: var(--text-muted);
    font-weight: 600;
    font-size: 0.82rem;
    background: rgba(255,255,255,0.02);
}

.archive-table tbody tr:hover {
    background: rgba(255,255,255,0.03);
}

.archive-table .col-no { width: 64px; color: var(--text-muted); }
.archive-table .col-title { width: auto; }
.archive-table .col-cat { width: 160px; color: var(--text-muted); }
.archive-table .col-size { width: 88px; color: var(--text-muted); white-space: nowrap; }
.archive-table .col-down { width: 120px; }
.archive-table .col-date { width: 110px; color: var(--text-muted); white-space: nowrap; }

.archive-table .title-link {
    color: var(--text);
    font-weight: 600;
    word-break: break-word;
}
.archive-table .title-link:hover { color: #93c5fd; }

.ext-badge {
    display: inline-block;
    margin-left: 0.45rem;
    padding: 0.08rem 0.4rem;
    border-radius: 4px;
    font-size: 0.7rem;
    font-weight: 700;
    letter-spacing: 0.02em;
    background: rgba(37,99,235,0.18);
    color: #93c5fd;
    vertical-align: middle;
}

.download-btn.table-dl {
    display: inline-block;
    padding: 0.4rem 0.75rem;
    font-size: 0.8rem;
    width: auto;
}

@media (max-width: 800px) {
    .archive-table .col-cat,
    .archive-table .col-date { display: none; }
    .archive-table .col-size { width: 72px; }
    .archive-table .col-down { width: 96px; }
}

/* Mobile glance layout */
@media (max-width: 768px) {
    .container { padding: 1rem 0.85rem 2rem; }

    .header { padding: 2rem 0.8rem 1.1rem; }
    .header-content { padding-top: 3.2rem; }
    .header h1 { font-size: 1.25rem; }
    .header p { font-size: 0.8rem; }
    .logo { height: 44px; max-width: 140px; }

    .search-box { flex-wrap: wrap; }
    .search-box input { min-width: 0; width: 100%; }

    .categories {
        flex-wrap: nowrap;
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
        gap: 0.45rem;
        margin-bottom: 0.9rem;
        padding-bottom: 0.35rem;
    }
    .cat-btn {
        flex: 0 0 auto;
        padding: 0.4rem 0.8rem;
        font-size: 0.8rem;
    }
    .sub-categories {
        flex-wrap: nowrap;
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
        gap: 0.4rem;
        margin-bottom: 1rem;
    }
    .sub-cat-btn { flex: 0 0 auto; font-size: 0.78rem; padding: 0.32rem 0.7rem; }

    .archive-table { table-layout: auto; }
    .archive-table thead { display: none; }
    .archive-table,
    .archive-table tbody,
    .archive-table tr,
    .archive-table td { display: block; width: 100%; }
    .archive-table tr {
        padding: 0.85rem 0.9rem 0.95rem;
        border-bottom: 1px solid var(--border);
    }
    .archive-table .col-no,
    .archive-table .col-cat,
    .archive-table .col-date { display: none; }
    .archive-table .col-title {
        width: 100%;
        padding: 0 0 0.45rem;
        font-size: 0.95rem;
    }
    .archive-table .col-size,
    .archive-table .col-down {
        display: inline-block;
        width: auto;
        padding: 0;
        vertical-align: middle;
    }
    .archive-table .col-size {
        margin-right: 0.7rem;
        font-size: 0.8rem;
    }
    .download-btn.table-dl {
        padding: 0.35rem 0.7rem;
        font-size: 0.78rem;
    }
}


.site-footer {
    text-align: center;
    padding: 1.4rem 1rem 2rem;
    color: #64748b;
    font-size: 0.82rem;
}


.hdr-link {
    display: inline-block !important;
    background: transparent !important;
    border: 0 !important;
    border-radius: 0 !important;
    padding: 4px 9px !important;
    font-size: 13px !important;
    font-weight: 500;
    color: rgba(255,255,255,0.72) !important;
    text-decoration: none !important;
    white-space: nowrap;
    letter-spacing: 0.01em;
}
.hdr-link:hover {
    color: #fff !important;
}
.userbar-btn {
    background: transparent !important;
    border: 0 !important;
    border-radius: 0 !important;
    padding: 4px 9px !important;
    font-size: 13px !important;
    font-weight: 500;
    color: rgba(255,255,255,0.88) !important;
}
.userbar-btn:hover { color: #fff !important; }