:root {
    --bg:        #0c0c0c;
    --bg2:       #161616;
    --bg3:       #1f1f1f;
    --bg4:       #2a2a2a;
    --accent:    #d3b06c;
    --accent2:   #b8934a;
    --text:      #e8e8e8;
    --text-muted:#9a9a9a;
    --danger:    #e05454;
    --success:   #4caf7d;
    --sidebar-w: 220px;
    --radius:    8px;
    --transition: 0.18s ease;
}

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

html, body {
    height: 100%;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    font-size: 14px;
    background: var(--bg);
    color: var(--text);
    line-height: 1.5;
}

/* ── App shell ──────────────────────────────────────────────────── */

.app-shell {
    display: flex;
    min-height: 100vh;
}

/* ── Sidebar ────────────────────────────────────────────────────── */

.sidebar {
    width: var(--sidebar-w);
    min-height: 100vh;
    background: var(--bg2);
    border-right: 1px solid var(--bg4);
    display: flex;
    flex-direction: column;
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    z-index: 200;
    transition: transform 0.25s ease;
}

/* ── Mobile top bar ─────────────────────────────────────────────── */

.topbar {
    display: none;
    align-items: center;
    gap: 12px;
    padding: 0 16px;
    height: 52px;
    background: var(--bg2);
    border-bottom: 1px solid var(--bg4);
    position: sticky;
    top: 0;
    z-index: 100;
}

.topbar-title {
    font-size: 16px;
    font-weight: 700;
    color: var(--accent);
    flex: 1;
}

.hamburger {
    background: none;
    border: none;
    cursor: pointer;
    padding: 6px;
    display: flex;
    flex-direction: column;
    gap: 5px;
}

.hamburger span {
    display: block;
    width: 22px;
    height: 2px;
    background: var(--accent);
    border-radius: 2px;
    transition: transform 0.2s ease, opacity 0.2s ease;
}

/* ── Sidebar overlay ────────────────────────────────────────────── */

.sidebar-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.6);
    z-index: 150;
}

.sidebar-brand {
    padding: 24px 20px 20px;
    font-size: 18px;
    font-weight: 700;
    color: var(--accent);
    letter-spacing: 0.03em;
    border-bottom: 1px solid var(--bg4);
    text-decoration: none;
    display: block;
}

.sidebar-brand:hover { color: var(--accent); }

.sidebar-section {
    padding: 12px 0 4px 20px;
    font-size: 10px;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--text-muted);
    font-weight: 600;
}

.sidebar-nav {
    flex: 1;
    display: flex;
    flex-direction: column;
    padding: 8px 0;
    overflow-y: auto;
}

.sidebar-nav a,
.sidebar-nav button.nav-btn {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 20px;
    color: var(--text-muted);
    text-decoration: none;
    font-size: 13.5px;
    font-weight: 500;
    border: none;
    background: none;
    cursor: pointer;
    font-family: inherit;
    width: 100%;
    text-align: left;
    transition: color var(--transition), background var(--transition);
    border-radius: 0;
}

.sidebar-nav a:hover,
.sidebar-nav button.nav-btn:hover {
    color: var(--accent);
    background: rgba(211, 176, 108, 0.06);
}

.sidebar-nav a.active {
    color: var(--accent);
    background: rgba(211, 176, 108, 0.1);
    border-left: 3px solid var(--accent);
    padding-left: 17px;
}

.sidebar-nav .nav-divider {
    height: 1px;
    background: var(--bg4);
    margin: 8px 20px;
}

.sidebar-footer {
    padding: 16px 20px;
    border-top: 1px solid var(--bg4);
    font-size: 12px;
    color: var(--text-muted);
}

/* ── Main content ───────────────────────────────────────────────── */

.page-content {
    margin-left: var(--sidebar-w);
    flex: 1;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

.page-body {
    flex: 1;
    padding: 32px 36px;
    max-width: 1100px;
}

.page-header {
    margin-bottom: 28px;
}

.page-header h1 {
    font-size: 22px;
    font-weight: 600;
    color: var(--text);
}

.page-header p {
    color: var(--text-muted);
    margin-top: 4px;
}

/* ── Card ───────────────────────────────────────────────────────── */

.card {
    background: var(--bg2);
    border: 1px solid var(--bg4);
    border-radius: var(--radius);
    padding: 24px;
    margin-bottom: 24px;
}

.card-title {
    font-size: 14px;
    font-weight: 600;
    color: var(--accent);
    text-transform: uppercase;
    letter-spacing: 0.06em;
    margin-bottom: 20px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--bg4);
}

/* ── Form ───────────────────────────────────────────────────────── */

.form-grid {
    display: grid;
    grid-template-columns: 160px 1fr;
    gap: 14px 20px;
    align-items: center;
    max-width: 520px;
}

.form-grid .label {
    text-align: right;
    font-size: 13px;
    font-weight: 500;
    color: var(--text-muted);
}

.form-grid .form-actions {
    grid-column: 2;
    display: flex;
    gap: 10px;
    padding-top: 4px;
}

input[type="text"],
input[type="email"],
input[type="password"],
input[type="number"],
input[type="date"],
input[type="tel"],
select,
textarea {
    background: var(--bg3);
    border: 1px solid var(--bg4);
    border-radius: 6px;
    color: var(--text);
    padding: 8px 12px;
    font-size: 13.5px;
    font-family: inherit;
    width: 100%;
    transition: border-color var(--transition);
    outline: none;
}

input[type="text"]:focus,
input[type="email"]:focus,
input[type="password"]:focus,
input[type="number"]:focus,
input[type="date"]:focus,
input[type="tel"]:focus,
select:focus,
textarea:focus {
    border-color: var(--accent);
}

input[type="checkbox"] {
    width: 16px;
    height: 16px;
    accent-color: var(--accent);
    cursor: pointer;
}

input[readonly] {
    color: var(--text-muted);
    cursor: default;
}

textarea {
    resize: vertical;
}

select option {
    background: var(--bg3);
}

/* ── Buttons ────────────────────────────────────────────────────── */

.btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 18px;
    border-radius: 6px;
    font-size: 13.5px;
    font-weight: 500;
    font-family: inherit;
    cursor: pointer;
    border: 1px solid transparent;
    transition: background var(--transition), border-color var(--transition), color var(--transition);
    text-decoration: none;
}

.btn-primary {
    background: var(--accent);
    color: var(--bg);
    border-color: var(--accent);
}
.btn-primary:hover {
    background: var(--accent2);
    border-color: var(--accent2);
}

.btn-secondary {
    background: transparent;
    color: var(--text-muted);
    border-color: var(--bg4);
}
.btn-secondary:hover {
    border-color: var(--accent);
    color: var(--accent);
}

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

.btn-sm {
    padding: 4px 12px;
    font-size: 12.5px;
}

/* legacy button override */
button:not(.nav-btn):not([class]) {
    display: inline-flex;
    align-items: center;
    padding: 8px 18px;
    border-radius: 6px;
    font-size: 13.5px;
    font-weight: 500;
    font-family: inherit;
    cursor: pointer;
    background: var(--accent);
    color: var(--bg);
    border: 1px solid var(--accent);
    transition: background var(--transition);
}
button:not(.nav-btn):not([class]):hover {
    background: var(--accent2);
    border-color: var(--accent2);
}

/* ── Table ──────────────────────────────────────────────────────── */

.data-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 13.5px;
}

.data-table thead th {
    background: var(--bg3);
    color: var(--accent);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-size: 11.5px;
    padding: 10px 14px;
    border-bottom: 1px solid var(--bg4);
    text-align: left;
    white-space: nowrap;
}

.data-table tbody td {
    padding: 10px 14px;
    border-bottom: 1px solid var(--bg3);
    color: var(--text);
    vertical-align: middle;
}

.data-table tbody tr:last-child td {
    border-bottom: none;
}

.data-table tbody tr:hover td {
    background: rgba(211, 176, 108, 0.04);
}

.data-table .selectable-row {
    cursor: pointer;
}

.data-table .selectable-row.selected td {
    background: rgba(211, 176, 108, 0.08);
}

/* ── Table wrapper ──────────────────────────────────────────────── */

.table-wrapper {
    background: var(--bg2);
    border: 1px solid var(--bg4);
    border-radius: var(--radius);
    overflow: hidden;
    margin-bottom: 24px;
}

.table-toolbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 14px 18px;
    border-bottom: 1px solid var(--bg4);
}

.table-toolbar-title {
    font-size: 13px;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.06em;
}

.table-scroll {
    max-height: 360px;
    overflow-y: auto;
}

/* ── Detail panel (two columns) ─────────────────────────────────── */

.detail-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 14px 28px;
    max-width: 700px;
}

.detail-field label {
    display: block;
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--text-muted);
    margin-bottom: 5px;
}

.detail-field input,
.detail-field textarea {
    width: 100%;
}

.detail-field.full {
    grid-column: 1 / -1;
}

/* ── Alerts ─────────────────────────────────────────────────────── */

.alert {
    padding: 12px 16px;
    border-radius: var(--radius);
    font-size: 13.5px;
    margin-bottom: 18px;
    border: 1px solid transparent;
}

.alert-success {
    background: rgba(76, 175, 125, 0.12);
    border-color: rgba(76, 175, 125, 0.3);
    color: var(--success);
}

.alert-danger {
    background: rgba(224, 84, 84, 0.12);
    border-color: rgba(224, 84, 84, 0.3);
    color: var(--danger);
}

.errors {
    color: var(--danger);
    font-size: 13px;
    margin-top: 10px;
}
.errors div { margin-bottom: 4px; }

/* ── Inline action links in tables ─────────────────────────────── */

a {
    color: var(--accent);
    text-decoration: none;
}
a:hover { color: var(--accent2); }

.action-cell {
    display: flex;
    align-items: center;
    gap: 8px;
}

/* ── Login page ─────────────────────────────────────────────────── */

.login-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg);
}

.login-card {
    background: var(--bg2);
    border: 1px solid var(--bg4);
    border-radius: 12px;
    padding: 40px 44px;
    width: 380px;
}

.login-card h1 {
    font-size: 20px;
    font-weight: 700;
    color: var(--accent);
    margin-bottom: 28px;
    text-align: center;
    letter-spacing: 0.02em;
}

.login-card .form-field {
    margin-bottom: 16px;
}

.login-card .form-field label {
    display: block;
    font-size: 12px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--text-muted);
    margin-bottom: 6px;
}

.login-card .form-field input {
    width: 100%;
}

.login-card .checkbox-row {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 22px;
    color: var(--text-muted);
    font-size: 13px;
}

.login-card .btn {
    width: 100%;
    justify-content: center;
    padding: 10px;
}

/* ── Scrollbar ──────────────────────────────────────────────────── */

::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: var(--bg4); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--accent2); }

/* ── Responsive ─────────────────────────────────────────────────── */

@media (max-width: 768px) {
    .topbar { display: flex; }

    .sidebar {
        transform: translateX(-100%);
        top: 0;
    }

    .sidebar.open {
        transform: translateX(0);
    }

    .sidebar-overlay.open {
        display: block;
    }

    .page-content {
        margin-left: 0;
    }

    .page-body {
        padding: 20px 16px;
    }

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

    .form-grid .label {
        text-align: left;
        margin-bottom: -8px;
    }

    .form-grid .form-actions {
        grid-column: 1;
    }

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

    .detail-field.full {
        grid-column: 1;
    }

    .login-card {
        width: 100%;
        margin: 16px;
        padding: 28px 24px;
    }
}