:root {
    --bg-deep: #0a0e14;
    --bg-panel: #111820;
    --bg-card: #161f2b;
    --bg-elevated: #1c2736;
    --border: #243044;
    --text: #e8edf4;
    --text-muted: #8b9cb3;
    --accent: #2dd4bf;
    --accent-dim: #14b8a6;
    --primary: #3b82f6;
    --primary-hover: #2563eb;
    --danger: #f87171;
    --success: #4ade80;
    --warning: #fbbf24;
    --radius: 12px;
    --shadow: 0 8px 32px rgba(0, 0, 0, 0.35);
}

* { box-sizing: border-box; }

body {
    font-family: "Vazirmatn", Tahoma, sans-serif;
    background: var(--bg-deep);
    color: var(--text);
    margin: 0;
}

/* Bootstrap defaults are for light UI — remap for dark dashboard & auth */
.app-body,
.auth-body {
    --bs-body-color: var(--text);
    --bs-body-bg: var(--bg-deep);
    --bs-secondary-color: var(--text-muted);
    --bs-tertiary-color: #6d7f96;
    --bs-emphasis-color: var(--text);
    --bs-heading-color: var(--text);
    --bs-link-color: var(--accent);
    --bs-link-hover-color: #5eead4;
    --bs-border-color: var(--border);
}

.app-body .text-muted,
.auth-body .text-muted,
.app-body .text-body-secondary,
.auth-body .text-body-secondary,
.app-body .text-secondary,
.auth-body .text-secondary {
    color: var(--text-muted) !important;
}

.app-body .card-panel .text-muted,
.app-body .empty-state {
    color: var(--text-muted) !important;
}

.app-body code,
.auth-body code {
    color: #a5f3fc;
    background: rgba(45, 212, 191, 0.1);
    padding: 0.1em 0.35em;
    border-radius: 4px;
}

.app-body .form-control::placeholder,
.auth-body .form-control::placeholder {
    color: #6d7f96;
    opacity: 1;
}

.app-body .text-danger,
.auth-body .text-danger {
    color: var(--danger) !important;
}

.app-body .h6,
.app-body h1, .app-body h2, .app-body h3,
.auth-body h1, .auth-body h2 {
    color: var(--text);
}

/* Auth */
.auth-body {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: radial-gradient(ellipse at 30% 20%, #1a3a4a 0%, var(--bg-deep) 55%);
}

.auth-card {
    width: 100%;
    max-width: 420px;
    margin: 1.5rem;
    padding: 2.5rem;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
}

.auth-brand { text-align: center; margin-bottom: 2rem; }
.auth-brand h1 { font-size: 1.75rem; font-weight: 700; margin: 0.5rem 0 0; }
.auth-brand p { color: var(--text-muted); margin: 0; font-size: 0.9rem; }
.brand-logo-lg {
    font-size: 2rem;
    font-weight: 700;
    color: var(--accent);
    letter-spacing: -1px;
}

.auth-form .form-control {
    background: var(--bg-elevated);
    border-color: var(--border);
    color: var(--text);
}
.auth-form .form-control:focus {
    background: var(--bg-elevated);
    border-color: var(--accent);
    color: var(--text);
    box-shadow: 0 0 0 0.2rem rgba(45, 212, 191, 0.2);
}

/* App shell */
.app-body { min-height: 100vh; }
.app-shell { display: flex; min-height: 100vh; }

.app-sidebar {
    width: 260px;
    flex-shrink: 0;
    background: var(--bg-panel);
    border-left: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    padding: 1.25rem;
}

.brand-block { margin-bottom: 2rem; }
.brand-logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--accent);
}
.brand-title { font-weight: 700; font-size: 1.1rem; }
.brand-sub { font-size: 0.75rem; color: var(--text-muted); margin-top: 0.25rem; }

.sidebar-nav { flex: 1; display: flex; flex-direction: column; gap: 0.35rem; }
.sidebar-nav .nav-link {
    color: var(--text-muted);
    text-decoration: none;
    padding: 0.65rem 1rem;
    border-radius: 8px;
    font-size: 0.9rem;
    transition: background 0.15s, color 0.15s;
}
.sidebar-nav .nav-link:hover {
    background: var(--bg-elevated);
    color: var(--text);
}
.sidebar-nav .nav-link.active {
    background: linear-gradient(90deg, rgba(45, 212, 191, 0.15), transparent);
    color: var(--accent);
    border-right: 3px solid var(--accent);
}

.sidebar-footer { margin-top: auto; padding-top: 1rem; border-top: 1px solid var(--border); }
.user-chip { font-size: 0.8rem; color: var(--text-muted); word-break: break-all; }

.app-main { flex: 1; display: flex; flex-direction: column; min-width: 0; }
.app-topbar {
    padding: 1.25rem 1.75rem;
    border-bottom: 1px solid var(--border);
    background: var(--bg-panel);
}
.page-title { margin: 0; font-size: 1.35rem; font-weight: 600; }
.app-content { padding: 1.5rem 1.75rem; flex: 1; }

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

.banner-vat {
    background: linear-gradient(90deg, rgba(74, 222, 128, 0.12), rgba(45, 212, 191, 0.08));
    border: 1px solid rgba(74, 222, 128, 0.35);
    border-radius: var(--radius);
    padding: 0.75rem 1rem;
    margin-bottom: 1rem;
    font-size: 0.9rem;
}

.table-app {
    --bs-table-bg: transparent;
    --bs-table-color: var(--text);
    --bs-table-border-color: var(--border);
    --bs-table-striped-bg: rgba(255, 255, 255, 0.02);
    --bs-table-hover-bg: rgba(45, 212, 191, 0.06);
    font-size: 0.85rem;
}
.table-app thead th {
    background: var(--bg-elevated);
    color: var(--text-muted);
    font-weight: 600;
    white-space: nowrap;
    position: sticky;
    top: 0;
    z-index: 1;
}
.table-wrap {
    max-height: 65vh;
    overflow: auto;
    border-radius: var(--radius);
    border: 1px solid var(--border);
}

.price-cell { font-variant-numeric: tabular-nums; direction: ltr; text-align: left; display: inline-block; }

/* Forms */
.form-control, .form-select {
    background: var(--bg-elevated);
    border-color: var(--border);
    color: var(--text);
}
.form-control:focus, .form-select:focus {
    background: var(--bg-elevated);
    border-color: var(--accent);
    color: var(--text);
    box-shadow: 0 0 0 0.2rem rgba(45, 212, 191, 0.15);
}
.form-label { color: var(--text-muted); font-size: 0.85rem; }

.btn-primary {
    background: var(--primary);
    border-color: var(--primary);
}
.btn-primary:hover { background: var(--primary-hover); border-color: var(--primary-hover); }
.btn-accent {
    background: var(--accent-dim);
    border-color: var(--accent-dim);
    color: #042f2e;
    font-weight: 600;
}
.btn-accent:hover { background: var(--accent); border-color: var(--accent); color: #042f2e; }

.badge-status {
    padding: 0.35em 0.65em;
    border-radius: 6px;
    font-size: 0.75rem;
    font-weight: 500;
}
.badge-preorder { background: rgba(251, 191, 36, 0.2); color: var(--warning); }
.badge-sent { background: rgba(59, 130, 246, 0.2); color: #93c5fd; }
.badge-cash { background: rgba(45, 212, 191, 0.15); color: var(--accent); }
.badge-credit { background: rgba(167, 139, 250, 0.2); color: #c4b5fd; }

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

.pagination .page-link {
    background: var(--bg-elevated);
    border-color: var(--border);
    color: var(--text);
}
.pagination .page-item.active .page-link {
    background: var(--accent-dim);
    border-color: var(--accent-dim);
    color: #042f2e;
}

.alert-success { background: rgba(74, 222, 128, 0.12); border-color: rgba(74, 222, 128, 0.3); color: var(--success); }
.alert-danger { background: rgba(248, 113, 113, 0.12); border-color: rgba(248, 113, 113, 0.3); color: var(--danger); }

.invoice-meta {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    gap: 1rem;
}

.qty-stepper {
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
}

.qty-stepper .line-qty-input {
    width: 4.25rem;
    text-align: center;
    padding: 0.2rem 0.35rem;
}

.qty-stepper .qty-dec,
.qty-stepper .qty-inc {
    min-width: 2rem;
    padding: 0.15rem 0.4rem;
    line-height: 1.2;
}
.meta-item label { display: block; font-size: 0.75rem; color: var(--text-muted); }
.meta-item span { font-weight: 500; }

/* Snackbar */
.snackbar-container {
    position: fixed;
    bottom: 1.25rem;
    left: 1.25rem;
    z-index: 1080;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    max-width: min(420px, calc(100vw - 2rem));
    pointer-events: none;
}

.snackbar {
    padding: 0.85rem 1.1rem;
    border-radius: 10px;
    font-size: 0.9rem;
    line-height: 1.45;
    box-shadow: var(--shadow);
    border: 1px solid var(--border);
    background: var(--bg-elevated);
    color: var(--text);
    opacity: 0;
    transform: translateY(12px);
    transition: opacity 0.28s ease, transform 0.28s ease;
    pointer-events: auto;
}

.snackbar.show {
    opacity: 1;
    transform: translateY(0);
}

.snackbar-success {
    border-color: rgba(74, 222, 128, 0.45);
    background: linear-gradient(135deg, #14352a 0%, var(--bg-elevated) 100%);
    color: #bbf7d0;
}

.snackbar-error {
    border-color: rgba(248, 113, 113, 0.45);
    background: linear-gradient(135deg, #3f1d1d 0%, var(--bg-elevated) 100%);
    color: #fecaca;
}

.snackbar-warning {
    border-color: rgba(251, 191, 36, 0.45);
    color: #fde68a;
}

.snackbar-info {
    border-color: rgba(59, 130, 246, 0.35);
    color: #bfdbfe;
}

/* Hide inline validation blocks — errors go to snackbar */
.validation-summary-valid,
.validation-summary-errors {
    display: none !important;
}

@media (max-width: 992px) {
    .app-shell { flex-direction: column; }
    .app-sidebar { width: 100%; border-left: none; border-bottom: 1px solid var(--border); }
}