:root {
    color-scheme: light;
    --bg: #f1f5f9;
    --panel: #ffffff;
    --panel-muted: #f8fafc;
    --panel-dark-from: #0f172a;
    --panel-dark-to: #1d4ed8;
    --text: #0f172a;
    --muted: #64748b;
    --primary: #2563eb;
    --primary-hover: #1d4ed8;
    --border: #dbe3ee;
    --shadow: 0 18px 40px rgba(15, 23, 42, 0.08);
    --shadow-strong: 0 24px 60px rgba(15, 23, 42, 0.28);
    --surface-overlay: rgba(255,255,255,0.92);
    --nav-surface: #ffffff;
    --nav-hover-bg: #f8fafc;
    --chip-bg: #eff6ff;
    --chip-text: #1d4ed8;
    --input-bg: #ffffff;
    --input-text: #0f172a;
    --focus-border: #93c5fd;
    --focus-shadow: 0 0 0 4px rgba(37, 99, 235, 0.12);
    --data-hover-bg: #ffffff;
    --login-shell-bg: #dbeafe;
    --login-card-bg: rgba(255,255,255,0.96);
    --danger: #b91c1c;
    --danger-bg: #fef2f2;
    --danger-border: #fecaca;
    --success: #047857;
    --success-bg: #ecfdf5;
    --success-border: #a7f3d0;
    --info: #1d4ed8;
    --info-bg: #eff6ff;
    --info-border: #bfdbfe;
}
html[data-theme="dark"] {
    color-scheme: dark;
    --bg: #020617;
    --panel: #0f172a;
    --panel-muted: #111827;
    --panel-dark-from: #111827;
    --panel-dark-to: #1d4ed8;
    --text: #e2e8f0;
    --muted: #94a3b8;
    --primary: #60a5fa;
    --primary-hover: #3b82f6;
    --border: #334155;
    --shadow: 0 18px 40px rgba(2, 6, 23, 0.45);
    --shadow-strong: 0 24px 60px rgba(2, 6, 23, 0.55);
    --surface-overlay: rgba(15, 23, 42, 0.9);
    --nav-surface: #0b1220;
    --nav-hover-bg: #162033;
    --chip-bg: rgba(37, 99, 235, 0.18);
    --chip-text: #bfdbfe;
    --input-bg: #020617;
    --input-text: #e2e8f0;
    --focus-border: #60a5fa;
    --focus-shadow: 0 0 0 4px rgba(96, 165, 250, 0.18);
    --data-hover-bg: #0b1220;
    --login-shell-bg: #020617;
    --login-card-bg: rgba(15, 23, 42, 0.96);
    --danger: #fca5a5;
    --danger-bg: rgba(127, 29, 29, 0.22);
    --danger-border: rgba(252, 165, 165, 0.3);
    --success: #86efac;
    --success-bg: rgba(20, 83, 45, 0.22);
    --success-border: rgba(134, 239, 172, 0.28);
    --info: #bfdbfe;
    --info-bg: rgba(30, 64, 175, 0.24);
    --info-border: rgba(191, 219, 254, 0.28);
}
* { box-sizing: border-box; }
body {
    margin: 0;
    font-family: "Segoe UI", Arial, sans-serif;
    background: var(--bg);
    color: var(--text);
}
a { color: inherit; }
.layout {
    max-width: 1180px;
    margin: 0 auto;
    padding: 24px;
}
.panel {
    border: 1px solid var(--border);
    border-radius: 22px;
    background: var(--panel);
    box-shadow: var(--shadow);
    padding: 24px;
}
.topbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 16px;
    margin-bottom: 24px;
    background: var(--surface-overlay);
    backdrop-filter: blur(10px);
}
.brand {
    display: flex;
    align-items: center;
    gap: 14px;
}
.brand-link {
    text-decoration: none;
}
.brand-link:hover .brand-badge {
    transform: translateY(-1px);
}
.brand-badge {
    width: 52px;
    height: 52px;
    display: grid;
    place-items: center;
    border-radius: 16px;
    font-weight: 700;
    font-size: 22px;
    color: white;
    background: linear-gradient(135deg, #2563eb, #06b6d4);
    transition: transform .15s ease;
}
.brand h1 {
    margin: 0;
    font-size: 28px;
}
.brand p {
    margin: 4px 0 0;
    color: var(--muted);
    font-size: 14px;
}
.topbar-right {
    display: flex;
    align-items: center;
    gap: 12px;
    flex-wrap: wrap;
    justify-content: flex-end;
}
.admin-chip {
    padding: 10px 14px;
    border-radius: 999px;
    background: var(--chip-bg);
    color: var(--chip-text);
    font-size: 14px;
    font-weight: 600;
    white-space: nowrap;
}
.theme-toggle {
    min-width: 132px;
    justify-content: flex-start;
    gap: 8px;
    white-space: nowrap;
    font-variant-numeric: tabular-nums;
}
.topnav {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-bottom: 24px;
    align-items: center;
}
.nav-link {
    padding: 12px 18px;
    border-radius: 14px;
    text-decoration: none;
    color: var(--muted);
    background: var(--nav-surface);
    border: 1px solid var(--border);
    font-weight: 600;
    box-shadow: 0 6px 18px rgba(15, 23, 42, 0.05);
}
.nav-link:hover {
    color: var(--text);
    border-color: #cbd5e1;
    background: var(--nav-hover-bg);
}
.nav-link.active {
    color: white;
    background: var(--primary);
    border-color: var(--primary);
}
.nav-link-accent {
    color: white;
    background: linear-gradient(135deg, #7c3aed, #2563eb);
    border-color: transparent;
}
.nav-link-accent:hover {
    color: white;
    background: linear-gradient(135deg, #6d28d9, #1d4ed8);
    border-color: transparent;
}
.admin-page {
    min-height: 420px;
}
.section-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 16px;
    margin-bottom: 20px;
}
.section-header h2 {
    margin: 0;
    font-size: 24px;
}
.section-header p {
    margin: 8px 0 0;
    color: var(--muted);
}
.panel-dark {
    background: linear-gradient(135deg, var(--panel-dark-from) 0%, var(--panel-dark-to) 100%);
    color: white;
    border-color: transparent;
}
.hero-text {
    margin: 0 0 22px;
    line-height: 1.6;
    color: rgba(255,255,255,0.84);
    max-width: 760px;
}
.cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 16px;
}
.action-card {
    display: block;
    padding: 18px;
    border-radius: 18px;
    text-decoration: none;
    background: rgba(255,255,255,0.14);
    border: 1px solid rgba(255,255,255,0.16);
}
.action-card h3 {
    margin: 0 0 8px;
    font-size: 18px;
}
.action-card p {
    margin: 0 0 14px;
    font-size: 14px;
    line-height: 1.5;
    color: rgba(255,255,255,0.78);
}
.action-card span {
    font-weight: 600;
}
.action-card-accent {
    background: linear-gradient(135deg, rgba(124, 58, 237, 0.3), rgba(37, 99, 235, 0.42));
    border-color: rgba(255,255,255,0.28);
}
.action-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
}
.button {
    appearance: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border: none;
    border-radius: 14px;
    padding: 12px 16px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    text-decoration: none;
    transition: transform .15s ease, background-color .2s ease, border-color .2s ease;
}
.button:hover { transform: translateY(-1px); }
.button-primary { color: white; background: var(--primary); }
.button-primary:hover { background: var(--primary-hover); }
.button-ghost {
    color: var(--muted);
    background: transparent;
    border: 1px solid var(--border);
}
.button-ghost:hover { color: var(--text); background: var(--nav-surface); }
.form-grid {
    display: grid;
    gap: 16px;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    margin-bottom: 20px;
}
.form-grid.single-column {
    grid-template-columns: minmax(240px, 420px);
}
.field {
    display: flex;
    flex-direction: column;
    gap: 8px;
}
.field label {
    font-size: 14px;
    font-weight: 600;
}
.field input,
.field textarea {
    width: 100%;
    border: 1px solid var(--border);
    border-radius: 14px;
    padding: 13px 15px;
    font: inherit;
    background: var(--input-bg);
    color: var(--input-text);
}
.field input:focus,
.field textarea:focus {
    outline: none;
    border-color: var(--focus-border);
    box-shadow: var(--focus-shadow);
}
.field input::placeholder,
.field textarea::placeholder {
    color: var(--muted);
}
.field textarea {
    min-height: 132px;
    resize: vertical;
}
.actions-row {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
}
.top-gap {
    margin-top: 18px;
}
.result {
    min-height: 48px;
    margin-top: 20px;
}
.status-card {
    padding: 14px 16px;
    border-radius: 16px;
    border: 1px solid transparent;
    font-size: 14px;
    line-height: 1.6;
}
.status-info { background: var(--info-bg); color: var(--info); border-color: var(--info-border); }
.status-error { background: var(--danger-bg); color: var(--danger); border-color: var(--danger-border); }
.status-success { background: var(--success-bg); color: var(--success); border-color: var(--success-border); }
.data-grid {
    display: grid;
    gap: 14px;
}
.data-card {
    display: block;
    padding: 18px;
    border-radius: 18px;
    border: 1px solid var(--border);
    background: var(--panel-muted);
    color: var(--text);
    text-decoration: none;
}
.data-card:hover {
    border-color: var(--focus-border);
    background: var(--data-hover-bg);
}
.data-title {
    margin: 0 0 10px;
    font-size: 16px;
    font-weight: 700;
}
.data-meta {
    display: grid;
    gap: 6px;
    color: var(--muted);
    font-size: 14px;
}
.empty-state {
    padding: 24px;
    border-radius: 18px;
    border: 1px dashed var(--border);
    background: var(--panel-muted);
    color: var(--muted);
    text-align: center;
}
.login-shell {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 24px;
    background: var(--login-shell-bg);
}
.login-card {
    width: 100%;
    max-width: 460px;
    padding: 32px;
    border-radius: 24px;
    background: var(--login-card-bg);
    border: 1px solid var(--border);
    box-shadow: var(--shadow-strong);
}
.alert {
    margin: 20px 0;
    padding: 14px 16px;
    border-radius: 14px;
    border: 1px solid transparent;
    font-size: 14px;
    line-height: 1.5;
}
.alert-error { background: var(--danger-bg); color: var(--danger); border-color: var(--danger-border); }
.hint {
    margin-top: 8px;
    color: var(--muted);
    font-size: 13px;
}
.status-inline {
    min-height: 22px;
    margin-top: 14px;
    font-size: 14px;
    color: var(--muted);
}
.status-inline.status-inline-error {
    color: var(--danger);
}
@media (max-width: 720px) {
    .layout { padding: 16px; }
    .topbar,
    .section-header { flex-direction: column; align-items: stretch; }
    .topbar-right { justify-content: space-between; }
    .form-grid.single-column { grid-template-columns: 1fr; }
}