:root {
    --bg-main: #f8fafc;
    --bg-card: #ffffff;
    --text-main: #0f172a;
    --text-muted: #64748b;
    --border-color: #e2e8f0;
    --primary: #0f172a;
    --primary-hover: #1e293b;
    --accent: #2563eb;
    --success: #16a34a;
    --danger: #dc2626;
    --radius: 8px;
    --shadow: 0 1px 3px rgba(0, 0, 0, 0.05), 0 1px 2px rgba(0, 0, 0, 0.03);
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    background-color: var(--bg-main);
    color: var(--text-main);
    line-height: 1.5;
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 24px 16px;
}

.container.narrow {
    max-width: 580px;
}

/* Header & Nav */
.admin-header {
    background: #ffffff;
    border-bottom: 1px solid var(--border-color);
}

.admin-nav-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 16px;
    padding-top: 14px;
    padding-bottom: 14px;
}

.brand-row {
    display: flex;
    align-items: center;
    gap: 10px;
}

.logo-mark {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 34px;
    height: 34px;
    background: #0f172a;
    color: #ffffff;
    font-weight: 700;
    font-size: 14px;
    border-radius: 6px;
}

.admin-nav {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.admin-nav a {
    text-decoration: none;
    color: var(--text-muted);
    font-size: 14px;
    font-weight: 500;
    padding: 6px 12px;
    border-radius: var(--radius);
    transition: background 0.15s, color 0.15s;
}

.admin-nav a:hover,
.admin-nav a.active {
    background: #f1f5f9;
    color: var(--text-main);
}

/* Page Titles */
.page-title-row {
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
    margin-bottom: 24px;
    flex-wrap: wrap;
    gap: 16px;
}

.category-tag {
    font-size: 12px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-muted);
}

.page-title-row h1 {
    font-size: 28px;
    font-weight: 700;
    line-height: 1.2;
}

.subtitle {
    color: var(--text-muted);
    font-size: 14px;
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 12px;
}

.year-select-form select {
    padding: 8px 12px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    background: #ffffff;
    font-size: 14px;
}

/* Metric Cards */
.metrics-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 16px;
    margin-bottom: 24px;
}

.metric-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    padding: 16px;
    box-shadow: var(--shadow);
}

.metric-label {
    font-size: 13px;
    color: var(--text-muted);
    margin-bottom: 6px;
}

.metric-value {
    font-size: 22px;
    font-weight: 700;
}

.expense-text {
    color: var(--danger);
}

.profit-text {
    color: var(--success);
}

.loss-text {
    color: var(--danger);
}

/* Cards & Content */
.card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    padding: 24px;
    margin-bottom: 24px;
    box-shadow: var(--shadow);
}

.card h1 {
    font-size: 24px;
    margin-bottom: 16px;
}

.card h2 {
    font-size: 18px;
    margin-bottom: 16px;
}

.card p.lead {
    color: var(--text-muted);
    margin-bottom: 20px;
}

/* Tables */
.table-responsive {
    overflow-x: auto;
}

.data-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 14px;
}

.data-table th,
.data-table td {
    padding: 12px 14px;
    border-bottom: 1px solid var(--border-color);
    text-align: left;
}

.data-table th {
    font-weight: 600;
    color: var(--text-muted);
    background: #f8fafc;
}

.data-table .total-row td {
    border-top: 2px solid var(--border-color);
    border-bottom: none;
    font-weight: 700;
}

.data-table .text-right {
    text-align: right;
}

.data-table .text-center {
    text-align: center;
}

.cancelled-row td {
    color: var(--text-muted);
    text-decoration: line-through;
}

.cancelled-row td a,
.cancelled-row td .badge {
    text-decoration: none;
}

/* Badges */
.badge {
    display: inline-block;
    padding: 2px 8px;
    border-radius: 999px;
    font-size: 12px;
    font-weight: 600;
}

.badge-active {
    background: #dcfce7;
    color: #15803d;
}

.badge-cancelled {
    background: #fee2e2;
    color: #b91c1c;
}

/* Links & Buttons */
.action-link {
    color: var(--accent);
    text-decoration: none;
    font-weight: 500;
}

.action-link:hover {
    text-decoration: underline;
}

.link-button {
    background: none;
    border: none;
    cursor: pointer;
    font-size: 14px;
    font-family: inherit;
    padding: 0;
}

.danger-text {
    color: var(--danger);
}

.button {
    display: inline-block;
    padding: 8px 16px;
    font-size: 14px;
    font-weight: 500;
    border-radius: var(--radius);
    text-decoration: none;
    border: 1px solid transparent;
    cursor: pointer;
    transition: background 0.15s;
}

.button.primary {
    background: var(--primary);
    color: #ffffff;
}

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

.button.secondary {
    background: #ffffff;
    color: var(--text-main);
    border-color: var(--border-color);
}

.button.secondary:hover {
    background: #f1f5f9;
}

.button.danger {
    background: var(--danger);
    color: #ffffff;
}

.button.full-width {
    width: 100%;
}

/* Forms */
.form-grid {