:root {
    --bg-deep: #0c1a1f;
    --bg-mid: #132f38;
    --bg-card: rgba(19, 47, 56, 0.75);
    --bg-input: rgba(8, 22, 28, 0.7);
    --accent: #2dd4a8;
    --accent-soft: rgba(45, 212, 168, 0.15);
    --accent-hover: #25b892;
    --text: #e8f4f1;
    --muted: #8fb3ab;
    --border: rgba(143, 179, 171, 0.18);
    --danger: #f07178;
    --danger-soft: rgba(240, 113, 120, 0.15);
    --warning: #e6c07b;
    --sidebar-w: 260px;
    --radius: 10px;
}

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

body {
    font-family: 'Vazirmatn', sans-serif;
    min-height: 100vh;
    color: var(--text);
    background:
        radial-gradient(ellipse 80% 60% at 20% 10%, rgba(45, 212, 168, 0.12), transparent 55%),
        radial-gradient(ellipse 70% 50% at 90% 80%, rgba(30, 120, 140, 0.2), transparent 50%),
        linear-gradient(165deg, var(--bg-deep) 0%, var(--bg-mid) 100%);
    background-attachment: fixed;
}

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

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

/* Sidebar */
.sidebar {
    width: var(--sidebar-w);
    flex-shrink: 0;
    background: rgba(8, 20, 26, 0.92);
    border-left: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    position: sticky;
    top: 0;
    height: 100vh;
    z-index: 40;
}

.sidebar-brand {
    padding: 1.5rem 1.25rem;
    border-bottom: 1px solid var(--border);
}

.sidebar-logo {
    display: block;
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--accent);
}

.sidebar-sub {
    font-size: 0.8rem;
    color: var(--muted);
    margin-top: 0.25rem;
    display: block;
}

.sidebar-nav {
    padding: 1rem 0.75rem;
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
    overflow-y: auto;
}

.sidebar-link {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 1rem;
    color: var(--muted);
    border-radius: 8px;
    transition: background 0.2s, color 0.2s;
    font-size: 0.95rem;
}

.sidebar-link:hover {
    background: var(--accent-soft);
    color: var(--text);
}

.sidebar-link.active {
    background: var(--accent-soft);
    color: var(--accent);
    font-weight: 600;
}

.sidebar-icon {
    width: 1.25rem;
    text-align: center;
    opacity: 0.85;
}

.main-wrap {
    flex: 1;
    display: flex;
    flex-direction: column;
    min-width: 0;
}

.topbar {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1.15rem 1.75rem;
    border-bottom: 1px solid var(--border);
    background: rgba(8, 20, 26, 0.45);
    backdrop-filter: blur(8px);
    position: sticky;
    top: 0;
    z-index: 20;
}

.page-title {
    font-size: 1.25rem;
    font-weight: 600;
}

.menu-toggle {
    display: none;
    background: var(--accent-soft);
    border: 1px solid var(--border);
    color: var(--text);
    width: 2.5rem;
    height: 2.5rem;
    border-radius: 8px;
    cursor: pointer;
    font-size: 1.1rem;
}

.content {
    flex: 1;
    padding: 1.5rem clamp(1rem, 3vw, 1.75rem);
}

.site-footer {
    padding: 1rem 1.75rem;
    color: var(--muted);
    font-size: 0.85rem;
    border-top: 1px solid var(--border);
}

/* Cards & grids */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.stat-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.25rem;
}

.stat-card .label {
    color: var(--muted);
    font-size: 0.85rem;
    margin-bottom: 0.5rem;
}

.stat-card .value {
    font-size: 1.35rem;
    font-weight: 700;
    color: var(--accent);
}

.panel {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.25rem;
    margin-bottom: 1.25rem;
}

.panel-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    flex-wrap: wrap;
    margin-bottom: 1rem;
}

.panel-header h2 {
    font-size: 1.05rem;
    font-weight: 600;
}

.tabs {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
    margin-bottom: 1.25rem;
}

.tab {
    padding: 0.55rem 1rem;
    border-radius: 8px;
    background: transparent;
    border: 1px solid var(--border);
    color: var(--muted);
    text-decoration: none;
    font-size: 0.9rem;
    font-family: inherit;
    cursor: pointer;
}

.tab:hover,
.tab.active {
    background: var(--accent-soft);
    color: var(--accent);
    border-color: transparent;
}

/* Forms */
.form-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
}

.form-group.full {
    grid-column: 1 / -1;
}

.form-group label {
    font-size: 0.85rem;
    color: var(--muted);
}

.form-group input,
.form-group select,
.form-group textarea {
    background: var(--bg-input);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 0.65rem 0.85rem;
    color: var(--text);
    font-family: inherit;
    font-size: 0.95rem;
    outline: none;
    transition: border-color 0.2s;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    border-color: var(--accent);
}

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

.form-actions {
    display: flex;
    gap: 0.75rem;
    flex-wrap: wrap;
    margin-top: 1rem;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.4rem;
    padding: 0.65rem 1.25rem;
    border-radius: 8px;
    border: none;
    font-family: inherit;
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    text-decoration: none;
    transition: transform 0.15s, box-shadow 0.15s, background 0.15s;
}

.btn:hover {
    transform: translateY(-1px);
}

.btn-primary {
    background: var(--accent);
    color: var(--bg-deep);
}

.btn-primary:hover {
    background: var(--accent-hover);
    box-shadow: 0 6px 18px var(--accent-soft);
}

.btn-secondary {
    background: var(--accent-soft);
    color: var(--accent);
    border: 1px solid transparent;
}

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

.btn-sm {
    padding: 0.4rem 0.75rem;
    font-size: 0.8rem;
}

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

table.data {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.9rem;
}

table.data th,
table.data td {
    padding: 0.75rem 0.85rem;
    text-align: right;
    border-bottom: 1px solid var(--border);
    white-space: nowrap;
}

table.data th {
    color: var(--muted);
    font-weight: 500;
    font-size: 0.8rem;
}

table.data tbody tr:hover {
    background: rgba(45, 212, 168, 0.05);
}

.badge {
    display: inline-block;
    padding: 0.2rem 0.55rem;
    border-radius: 6px;
    font-size: 0.75rem;
    font-weight: 600;
}

.badge-success {
    background: var(--accent-soft);
    color: var(--accent);
}

.badge-warning {
    background: rgba(230, 192, 123, 0.15);
    color: var(--warning);
}

.badge-danger {
    background: var(--danger-soft);
    color: var(--danger);
}

.badge-muted {
    background: rgba(143, 179, 171, 0.12);
    color: var(--muted);
}

.alert {
    padding: 0.85rem 1.1rem;
    border-radius: 8px;
    margin-bottom: 1.25rem;
    font-size: 0.9rem;
}

.alert-success {
    background: var(--accent-soft);
    color: var(--accent);
    border: 1px solid rgba(45, 212, 168, 0.3);
}

.alert-error {
    background: var(--danger-soft);
    color: var(--danger);
    border: 1px solid rgba(240, 113, 120, 0.3);
}

.empty {
    text-align: center;
    color: var(--muted);
    padding: 2rem;
}

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

.text-credit {
    color: var(--accent);
}

.actions {
    display: flex;
    gap: 0.4rem;
}

.filter-bar {
    display: flex;
    gap: 0.75rem;
    flex-wrap: wrap;
    align-items: end;
    margin-bottom: 1rem;
}

.filter-bar .form-group {
    min-width: 140px;
}

.sale-items-table input {
    width: 100%;
    min-width: 80px;
}

.sidebar-overlay {
    display: none;
}

@media (max-width: 900px) {
    .sidebar {
        position: fixed;
        right: 0;
        top: 0;
        transform: translateX(100%);
        transition: transform 0.25s ease;
    }

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

    .menu-toggle {
        display: inline-flex;
        align-items: center;
        justify-content: center;
    }

    .sidebar-overlay.show {
        display: block;
        position: fixed;
        inset: 0;
        background: rgba(0, 0, 0, 0.5);
        z-index: 30;
    }
}