:root {
    --bg: #f4f7fb;
    --surface: #ffffff;
    --surface-2: #eef3fb;
    --surface-3: #f8fbff;
    --text: #1f2a44;
    --muted: #66758f;
    --primary: #2f2383;
    --primary-2: #157fc0;
    --accent: #e32619;
    --success: #089c42;
    --success-soft: rgba(8,156,66,.1);
    --warning: #d97706;
    --danger: #c62828;
    --border: #d9e2f1;
    --shadow-sm: 0 12px 24px rgba(31,42,68,0.06);
    --shadow-md: 0 18px 45px rgba(31,42,68,0.10);
    --radius-xl: 24px;
    --radius-lg: 18px;
    --radius-md: 14px;
    --radius-sm: 10px;
    --container: 1180px;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
    font-family: "Segoe UI", Arial, sans-serif;
    color: var(--text);
    line-height: 1.5;
    background:
        radial-gradient(circle at top left, rgba(21,127,192,0.10), transparent 28%),
        radial-gradient(circle at top right, rgba(47,35,131,0.10), transparent 24%),
        linear-gradient(180deg, #f6f9fd 0%, #eef4fb 100%);
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button, input, select, textarea { font: inherit; }
.container { width: min(var(--container), calc(100% - 32px)); margin: 0 auto; }
.hidden { display: none !important; }
.muted { color: var(--muted); }
.notice, .warning {
    border-radius: 16px; padding: 14px 16px; margin-bottom: 16px; border: 1px solid var(--border);
}
.notice { background: #edf8f1; color: #22633a; border-color: #cfe8d6; }
.warning { background: #fff5e8; color: #8b5a14; border-color: #f3d8a8; }

.topbar {
    position: sticky; top: 0; z-index: 30; backdrop-filter: blur(14px);
    background: rgba(255,255,255,0.88); border-bottom: 1px solid rgba(217,226,241,0.85);
}
.topbar-inner {
    min-height: 82px; display: flex; align-items: center; justify-content: space-between; gap: 20px;
}
.brand { display: flex; align-items: center; gap: 14px; }
.brand-logo {
    width: 58px; height: 58px; object-fit: contain; border-radius: 14px; background: #fff; padding: 4px;
    box-shadow: 0 10px 25px rgba(47,35,131,0.10);
}
.brand-text { display: flex; flex-direction: column; gap: 2px; }
.brand-text strong { font-size: 20px; color: var(--primary); }
.brand-text span { font-size: 13px; color: var(--muted); }
.topnav { display: flex; align-items: center; gap: 18px; flex-wrap: wrap; }
.topnav a { font-weight: 600; color: var(--text); }
.topnav a.active { color: var(--primary); }
.logout-link, .btn-primary {
    display: inline-flex; align-items: center; justify-content: center;
    padding: 12px 18px; border-radius: 999px; border: 0; cursor: pointer;
    background: linear-gradient(135deg, var(--primary), var(--primary-2)); color: #fff; font-weight: 700;
    box-shadow: 0 12px 20px rgba(47,35,131,0.16);
}
.btn-primary:hover, .logout-link:hover { transform: translateY(-1px); }
.btn-secondary {
    display: inline-flex; align-items: center; justify-content: center;
    padding: 12px 18px; border-radius: 999px; border: 1px solid var(--border);
    background: #fff; color: var(--primary); font-weight: 700;
}
.btn-danger {
    display: inline-flex; align-items: center; justify-content: center;
    padding: 10px 16px; border-radius: 999px; background: rgba(198,40,40,.08); color: var(--danger); font-weight: 700;
}
/* Дерево категорий в каталоге */
.cat-tree {
    list-style: none;
    margin: 0;
    padding-left: 0;
}

.cat-tree .cat-item {
    margin: 6px 0;
}

.cat-link {
    display: inline-block;
    padding: 4px 8px;
    border-radius: 6px;
    text-decoration: none;
    color: var(--ink);
    background: rgba(240, 245, 255, 0.8);
    transition: background 0.15s ease, color 0.15s ease;
    font-size: 14px;
}

.cat-link:hover {
    background: rgba(80, 120, 200, 0.12);
    color: var(--accent);
}
.cat-link-active {
    background: rgba(80, 120, 200, 0.16);
    color: var(--accent);
    font-weight: 600;
}
.page-shell { padding: 28px 0 48px; }
.page-grid {
    display: grid; grid-template-columns: 290px 1fr; gap: 24px; align-items: start;
}
.sidebar-panel, .content-panel, .card, .hero-panel, .hero-copy, .stat-card, .login-card {
    background: rgba(255,255,255,0.90); border: 1px solid rgba(217,226,241,0.95);
    border-radius: var(--radius-xl); box-shadow: var(--shadow-md);
}
.sidebar-panel { padding: 22px; position: sticky; top: 102px; }
.side-title { margin: 0 0 16px; font-size: 14px; color: var(--muted); text-transform: uppercase; letter-spacing: .08em; }
.side-nav { display: grid; gap: 10px; }
.side-nav a {
    display: flex; align-items: center; gap: 12px; padding: 14px 16px; border-radius: 16px;
    background: var(--surface-3); border: 1px solid transparent; font-weight: 600;
}
.side-nav a:hover, .side-nav a.current {
    background: linear-gradient(135deg, rgba(47,35,131,.09), rgba(21,127,192,.08));
    border-color: rgba(47,35,131,.10); color: var(--primary);
}
.side-note { margin-top: 16px; padding: 16px; border-radius: 18px; background: rgba(21,127,192,.07); color: var(--muted); }
.content-panel { padding: 24px; }
.section-head { display: flex; justify-content: space-between; align-items: end; gap: 16px; margin-bottom: 22px; }
.section-head h1, .section-head h2 { margin: 0 0 8px; color: var(--primary); }
.section-head h1 { font-size: 32px; }
.section-head p { margin: 0; color: var(--muted); }
.card { padding: 22px; margin-bottom: 20px; }
.form-grid { display: grid; gap: 16px; }
.form-row-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
label { display: block; margin-bottom: 8px; font-weight: 700; color: var(--primary); }
input, textarea, select {
    width: 100%; border: 1px solid var(--border); background: #fff; border-radius: 16px;
    padding: 14px 16px; outline: none; color: var(--text);
}
textarea { min-height: 120px; resize: vertical; }
input:focus, textarea:focus, select:focus {
    border-color: var(--primary-2); box-shadow: 0 0 0 4px rgba(21,127,192,0.12);
}
.table-wrap {
    overflow-x: auto; border: 1px solid var(--border); border-radius: 18px; background: #fff;
}
.table {
    width: 100%; border-collapse: collapse; min-width: 720px;
}
.table th, .table td {
    padding: 14px 16px; border-bottom: 1px solid #edf2fa; text-align: left; vertical-align: top;
}
.table th { background: #f8fbff; color: var(--primary); font-size: 14px; }
.badge {
    display: inline-flex; align-items: center; padding: 6px 10px; border-radius: 999px;
    background: var(--surface-2); color: var(--primary); font-size: 12px; font-weight: 700;
}
.badge.success { background: var(--success-soft); color: var(--success); }
.badge.admin { background: rgba(47,35,131,.10); color: var(--primary); }
.action-row { display: flex; gap: 10px; flex-wrap: wrap; }
.empty-state, .empty-inner {
    background: rgba(255,255,255,0.92); border: 1px dashed var(--border);
    border-radius: 18px; padding: 24px; color: var(--muted);
}
.hero { padding: 16px 0 18px; }
.hero-grid { display: grid; grid-template-columns: 1.25fr .9fr; gap: 24px; }
.hero-copy { padding: 32px; }
.hero-panel { padding: 22px; display: grid; gap: 16px; }
.hero-badge {
    display: inline-flex; padding: 8px 14px; border-radius: 999px; background: rgba(21,127,192,0.10);
    color: var(--primary-2); font-size: 13px; font-weight: 700; margin-bottom: 18px;
}
.hero-copy h1 { margin: 0 0 14px; font-size: clamp(30px, 4vw, 46px); line-height: 1.08; color: var(--primary); }
.hero-copy p { margin: 0; max-width: 720px; color: var(--muted); font-size: 17px; }
.hero-logo-card {
    background: linear-gradient(180deg, #ffffff 0%, #f2f6fc 100%); border: 1px solid var(--border);
    border-radius: 22px; min-height: 220px; display: flex; align-items: center; justify-content: center; padding: 18px;
}
.hero-logo { width: min(100%, 250px); max-height: 280px; object-fit: contain; }
.hero-stats { display: grid; gap: 12px; }
.stat-card { padding: 16px 18px; }
.stat-label { display: block; color: var(--muted); font-size: 12px; text-transform: uppercase; letter-spacing: .08em; margin-bottom: 6px; }
.login-shell {
    min-height: 100dvh; display: grid; place-items: center; padding: 28px 0;
}
.login-layout { width: min(1120px, calc(100% - 32px)); display: grid; grid-template-columns: 1.1fr .9fr; gap: 24px; align-items: stretch; }
.login-card { padding: 34px; }
.login-logo { width: 94px; height: 94px; object-fit: contain; margin-bottom: 18px; }
.login-card h1 { margin: 0 0 12px; font-size: 38px; color: var(--primary); }
.login-card p { color: var(--muted); }
.login-panel {
    background: linear-gradient(145deg, rgba(47,35,131,.95), rgba(21,127,192,.92)); color: #fff;
    border-radius: var(--radius-xl); padding: 34px; position: relative; overflow: hidden; box-shadow: var(--shadow-md);
}
.login-panel::before, .login-panel::after {
    content: ''; position: absolute; border-radius: 999px; filter: blur(2px); opacity: .25;
}
.login-panel::before { width: 240px; height: 240px; right: -70px; top: -60px; background: rgba(255,255,255,.22); }
.login-panel::after { width: 260px; height: 260px; left: -90px; bottom: -110px; background: rgba(227,38,25,.28); }
.login-list { display: grid; gap: 14px; margin-top: 26px; }
.login-item { padding: 16px 18px; border-radius: 18px; background: rgba(255,255,255,.10); border: 1px solid rgba(255,255,255,.14); }
.catalog-grid { display: grid; gap: 22px; }
.category-card {
    background: rgba(255,255,255,0.90); border: 1px solid rgba(217,226,241,0.95);
    border-radius: 24px; padding: 24px; box-shadow: 0 14px 30px rgba(31,42,68,0.08);
}
.category-head { display: flex; align-items: flex-start; gap: 16px; margin-bottom: 18px; }
.category-icon {
    width: 52px; height: 52px; border-radius: 16px; background: linear-gradient(135deg, rgba(21,127,192,0.18), rgba(47,35,131,0.12));
    display: flex; align-items: center; justify-content: center; font-size: 26px;
}
.category-head h2 { margin: 0 0 6px; color: var(--primary); font-size: 26px; }
.category-subtitle { margin: 0; color: var(--muted); }
.file-cards { display: grid; gap: 14px; margin-top: 14px; }
.file-card {
    display: flex; justify-content: space-between; align-items: center; gap: 18px; background: linear-gradient(180deg, #ffffff 0%, #f8fbff 100%);
    border: 1px solid var(--border); border-radius: 18px; padding: 18px;
}
.file-meta { display: flex; gap: 14px; align-items: flex-start; min-width: 0; }
.file-icon {
    width: 46px; height: 46px; border-radius: 14px; background: rgba(227,38,25,0.08); display: flex; align-items: center; justify-content: center;
    font-size: 24px; flex-shrink: 0;
}
.file-info h3 { margin: 0 0 6px; font-size: 18px; color: var(--text); }
.file-info p { margin: 0 0 10px; color: var(--muted); font-size: 14px; }
.file-tags { display: flex; gap: 8px; flex-wrap: wrap; }
.file-tags span {
    display: inline-flex; padding: 6px 10px; border-radius: 999px; background: var(--surface-2); color: var(--primary); font-size: 12px; font-weight: 700;
}
.download-btn {
    display: inline-flex; align-items: center; justify-content: center; padding: 12px 18px; min-width: 132px; border-radius: 999px;
    background: linear-gradient(135deg, var(--primary), var(--primary-2)); color: #fff; font-weight: 700; box-shadow: 0 12px 20px rgba(47,35,131,0.16);
}
.subcategories { margin-top: 20px; padding-top: 18px; border-top: 1px dashed var(--border); }
.subcat-title { margin: 0 0 14px; color: var(--primary-2); }
.quick-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.quick-card {
    padding: 18px; border-radius: 20px; background: linear-gradient(180deg, #ffffff 0%, #f8fbff 100%);
    border: 1px solid var(--border); box-shadow: var(--shadow-sm);
}
.quick-card h3 { margin: 10px 0 8px; color: var(--primary); font-size: 18px; }
.quick-card p { margin: 0; color: var(--muted); font-size: 14px; }
.inline-tools { display: flex; gap: 12px; flex-wrap: wrap; }
.logo-preview {
    display: flex; align-items: center; justify-content: center; min-height: 180px; border: 1px dashed var(--border);
    border-radius: 18px; background: #fff;
}
.logo-preview img { max-height: 180px; width: auto; object-fit: contain; }
@media (max-width: 1100px) {
    .page-grid, .hero-grid, .login-layout, .quick-grid { grid-template-columns: 1fr; }
    .sidebar-panel { position: static; }
}
@media (max-width: 780px) {
    .container { width: min(var(--container), calc(100% - 20px)); }
    .topbar-inner { align-items: flex-start; padding: 14px 0; flex-direction: column; }
    .topnav { width: 100%; justify-content: flex-start; }
    .file-card, .form-row-2, .section-head { grid-template-columns: 1fr; display: grid; }
    .file-card { align-items: stretch; }
    .download-btn, .btn-primary, .btn-secondary { width: 100%; }
    .hero-copy, .hero-panel, .card, .content-panel, .login-card, .login-panel, .sidebar-panel { padding: 18px; }
    .hero-copy h1, .login-card h1 { font-size: 28px; }
}

.category-toggle {
    width: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 16px;
    background: transparent;
    border: 0;
    padding: 0;
    cursor: pointer;
    text-align: left;
}
.category-toggle-main {
    display: flex;
    align-items: flex-start;
    gap: 16px;
    min-width: 0;
}
.category-head-text {
    display: flex;
    flex-direction: column;
    gap: 6px;
    min-width: 0;
}
.category-title-row {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 10px;
}
.category-name {
    font-size: 26px;
    font-weight: 700;
    color: var(--primary);
}
.category-counts {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}
.category-chevron {
    width: 42px;
    height: 42px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 999px;
    background: var(--surface-2);
    color: var(--primary);
    font-size: 24px;
    flex-shrink: 0;
    transition: transform .2s ease;
}
.category-toggle[aria-expanded="true"] .category-chevron {
    transform: rotate(180deg);
}
.category-panel {
    display: none;
    margin-top: 18px;
}
.category-panel.is-open {
    display: block;
}
.nested-grid {
    margin-top: 12px;
}
.accordion-item[data-depth="1"] {
    background: rgba(248,251,255,0.98);
}
.accordion-item[data-depth="2"] {
    background: rgba(255,255,255,0.96);
    border-left: 4px solid rgba(21,127,192,.12);
}
@media (max-width: 780px) {
    .category-name {
        font-size: 22px;
    }
    .category-toggle {
        align-items: flex-start;
    }
}

.file-icon {
    width: 52px;
    height: 52px;
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
    font-weight: 800;
    letter-spacing: .04em;
    text-transform: uppercase;
    flex-shrink: 0;
    color: #fff;
    box-shadow: inset 0 -10px 18px rgba(255,255,255,.08);
}
.file-icon-pdf { background: linear-gradient(135deg, #d62828, #ef4444); }
.file-icon-doc { background: linear-gradient(135deg, #2563eb, #3b82f6); }
.file-icon-xls { background: linear-gradient(135deg, #0f9f55, #22c55e); }
.file-icon-ppt { background: linear-gradient(135deg, #ea580c, #fb923c); }
.file-icon-img { background: linear-gradient(135deg, #7c3aed, #a855f7); }
.file-icon-zip { background: linear-gradient(135deg, #4b5563, #6b7280); }
.file-icon-file { background: linear-gradient(135deg, #157fc0, #2f2383); }

.admin-tree {
    display: grid;
    gap: 16px;
}
.admin-tree-nested {
    margin-top: 12px;
}
.admin-tree-item {
    border: 1px solid var(--border);
    border-radius: 20px;
    background: linear-gradient(180deg, #ffffff 0%, #f8fbff 100%);
    box-shadow: var(--shadow-sm);
    overflow: hidden;
}
.admin-tree-toggle {
    width: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 16px;
    padding: 18px;
    border: 0;
    background: transparent;
    text-align: left;
    cursor: pointer;
}
.admin-tree-main {
    display: flex;
    align-items: flex-start;
    gap: 14px;
    min-width: 0;
}
.admin-tree-icon {
    width: 48px;
    height: 48px;
    border-radius: 16px;
    background: linear-gradient(135deg, rgba(21,127,192,0.16), rgba(47,35,131,0.14));
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    flex-shrink: 0;
}
.admin-tree-text {
    display: flex;
    flex-direction: column;
    gap: 6px;
    min-width: 0;
}
.admin-tree-title-row {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-wrap: wrap;
}
.admin-tree-name {
    font-size: 22px;
    font-weight: 700;
    color: var(--primary);
}
.admin-tree-badges {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}
.admin-tree-actions {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-shrink: 0;
}
.admin-tree-chevron {
    width: 42px;
    height: 42px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 999px;
    background: var(--surface-2);
    color: var(--primary);
    font-size: 24px;
    transition: transform .2s ease;
}
.admin-tree-toggle[aria-expanded="true"] .admin-tree-chevron {
    transform: rotate(180deg);
}
.admin-tree-panel {
    display: none;
    padding: 0 18px 18px;
}
.admin-tree-panel.is-open {
    display: block;
}
.admin-tree-toolbar {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
    margin-bottom: 14px;
}
.page-footer {
    padding: 18px 0;
    border-top: 1px solid rgba(217,226,241,0.85);
    background: rgba(255,255,255,0.92);
    margin-top: 20px;
}
.footer-inner {
    font-size: 13px;
    color: var(--muted);
    text-align: center;
}
@media (max-width: 780px) {
    .admin-tree-toggle {
        padding: 16px;
        align-items: flex-start;
    }
    .admin-tree-name {
        font-size: 20px;
    }
}