/* ==========================================================================
   InvoiceFlow Modern Design System
   Inspired by Stripe & Linear: Crisp typography, subtle elevations, balanced density
   ========================================================================== */

:root {
    /* Brand & Accent */
    --accent: #5e6ad2;
    --accent-hover: #4f5bc4;
    --accent-subtle: rgba(94, 106, 210, 0.08);
    --accent-border: rgba(94, 106, 210, 0.25);

    /* Backgrounds & Canvas */
    --bg-page: #f8fafc;
    --bg-card: #ffffff;
    --bg-surface: #f1f5f9;
    --bg-surface-hover: #e2e8f0;
    --bg-dark: #0f172a;
    --bg-dark-card: #1e293b;

    /* Typography Colors */
    --text-primary: #0f172a;
    --text-secondary: #475569;
    --text-muted: #64748b;
    --text-faint: #94a3b8;

    /* Borders & Lines */
    --border-color: #e2e8f0;
    --border-subtle: #f1f5f9;
    --border-focus: #5e6ad2;

    /* Status Colors */
    --success: #10b981;
    --success-bg: #ecfdf5;
    --success-border: #a7f3d0;
    --success-text: #065f46;

    --warning: #f59e0b;
    --warning-bg: #fffbeb;
    --warning-border: #fde68a;
    --warning-text: #92400e;

    --danger: #ef4444;
    --danger-bg: #fef2f2;
    --danger-border: #fecaca;
    --danger-text: #991b1b;

    --info: #3b82f6;
    --info-bg: #eff6ff;
    --info-border: #bfdbfe;
    --info-text: #1e40af;

    /* Shadows (layered depth) */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(15, 23, 42, 0.06), 0 2px 4px -2px rgba(15, 23, 42, 0.04);
    --shadow-lg: 0 10px 15px -3px rgba(15, 23, 42, 0.08), 0 4px 6px -4px rgba(15, 23, 42, 0.03);
    --shadow-sheet: 0 20px 25px -5px rgba(15, 23, 42, 0.05), 0 8px 10px -6px rgba(15, 23, 42, 0.04), 0 0 0 1px rgba(226, 232, 240, 0.8);

    /* Radii */
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --radius-full: 9999px;

    /* Transitions */
    --transition: all 0.15s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Reset & Box Sizing */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    background-color: var(--bg-page);
    color: var(--text-primary);
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Monospace fonts for numbers, codes, dates */
.font-mono {
    font-family: 'JetBrains Mono', ui-monospace, Menlo, Monaco, monospace !important;
}
.font-bold { font-weight: 700; }
.font-medium { font-weight: 500; }
.text-muted { color: var(--text-muted); }
.text-accent { color: var(--accent); }
.text-danger { color: var(--danger); }
.text-right { text-align: right; }
.text-center { text-align: center; }

/* --------------------------------------------------------------------------
   Navbar
   -------------------------------------------------------------------------- */
.navbar {
    background-color: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 50;
    transition: var(--transition);
}

.nav-container {
    max-width: 1140px;
    margin: 0 auto;
    padding: 0.75rem 1.25rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1rem;
}

.nav-brand {
    display: inline-flex;
    align-items: center;
    gap: 0.65rem;
    text-decoration: none;
    color: var(--text-primary);
}

.brand-badge {
    background: linear-gradient(135deg, var(--accent) 0%, #4338ca 100%);
    color: #fff;
    width: 32px;
    height: 32px;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 2px 5px rgba(94, 106, 210, 0.3);
}

.brand-text {
    font-size: 1.15rem;
    letter-spacing: -0.02em;
    color: var(--text-primary);
}
.brand-text strong {
    color: var(--accent);
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.nav-link {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.88rem;
    font-weight: 500;
    padding: 0.45rem 0.75rem;
    border-radius: var(--radius-sm);
    transition: var(--transition);
}

.nav-link:hover {
    color: var(--text-primary);
    background-color: var(--bg-surface);
}

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

.nav-link-logout {
    color: var(--text-muted);
    padding: 0.45rem;
}
.nav-link-logout:hover {
    color: var(--danger);
    background-color: var(--danger-bg);
}

.btn-nav-primary {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    background-color: var(--accent);
    color: #fff !important;
    text-decoration: none;
    font-size: 0.85rem;
    font-weight: 600;
    padding: 0.45rem 0.85rem;
    border-radius: var(--radius-sm);
    box-shadow: 0 1px 2px rgba(94, 106, 210, 0.2);
    transition: var(--transition);
    margin-left: 0.25rem;
}
.btn-nav-primary:hover {
    background-color: var(--accent-hover);
    transform: translateY(-1px);
    box-shadow: 0 3px 8px rgba(94, 106, 210, 0.3);
}

/* --------------------------------------------------------------------------
   Layout & Container
   -------------------------------------------------------------------------- */
.container {
    max-width: 1140px;
    width: 100%;
    margin: 1.75rem auto;
    padding: 0 1.25rem;
    flex: 1;
}

.page-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 1.75rem;
    flex-wrap: wrap;
    gap: 1rem;
}

.page-title {
    font-size: 1.6rem;
    font-weight: 700;
    letter-spacing: -0.03em;
    color: var(--text-primary);
    line-height: 1.2;
}

.page-subtitle {
    font-size: 0.92rem;
    color: var(--text-muted);
    margin-top: 0.25rem;
}

/* --------------------------------------------------------------------------
   Cards
   -------------------------------------------------------------------------- */
.card {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

/* --------------------------------------------------------------------------
   Metric Cards (Dashboard)
   -------------------------------------------------------------------------- */
.metrics-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 1rem;
    margin-bottom: 1.75rem;
}

.metric-card {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 1.25rem;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

.metric-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.metric-top {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.5rem;
}

.metric-label {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

.metric-icon {
    width: 32px;
    height: 32px;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--bg-surface);
    color: var(--text-secondary);
}

.metric-value {
    font-size: 1.75rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    color: var(--text-primary);
    margin: 0.35rem 0 0.75rem 0;
}

.metric-footer {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.82rem;
    flex-wrap: wrap;
}

.metric-hint {
    color: var(--text-muted);
}

.metric-warning {
    border-top: 3px solid var(--warning);
}
.metric-warning .metric-icon {
    background-color: var(--warning-bg);
    color: var(--warning);
}

.metric-success {
    border-top: 3px solid var(--success);
}
.metric-success .metric-icon {
    background-color: var(--success-bg);
    color: var(--success-success);
}

.metric-neutral {
    border-top: 3px solid var(--accent);
}
.metric-neutral .metric-icon {
    background-color: var(--accent-subtle);
    color: var(--accent);
}

/* --------------------------------------------------------------------------
   Table & Lists
   -------------------------------------------------------------------------- */
.card-table {
    overflow: hidden;
    padding: 0;
}

.card-table-header {
    padding: 1.15rem 1.25rem;
    border-bottom: 1px solid var(--border-color);
    background-color: #fafbfc;
}

.search-bar {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    flex-wrap: wrap;
}

.search-input-wrapper {
    position: relative;
    flex: 1;
    min-width: 260px;
}

.search-icon {
    position: absolute;
    left: 12px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
    pointer-events: none;
}

.form-control-search {
    padding-left: 36px !important;
}

.select-custom {
    cursor: pointer;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='%2364748b' viewBox='0 0 16 16'%3E%3Cpath d='M8 11.5l-5-5h10l-5 5z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 12px center;
    padding-right: 32px !important;
    appearance: none;
    -webkit-appearance: none;
}

.table-responsive {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}

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

.table th {
    background-color: #fafbfc;
    color: var(--text-muted);
    font-size: 0.78rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    padding: 0.85rem 1.25rem;
    border-bottom: 1px solid var(--border-color);
}

.table td {
    padding: 1rem 1.25rem;
    border-bottom: 1px solid var(--border-subtle);
    color: var(--text-secondary);
    vertical-align: middle;
}

.table tbody tr {
    transition: var(--transition);
}

.table tbody tr:hover {
    background-color: #f8fafc;
}

.cell-invoice-num {
    color: var(--accent);
    font-weight: 600;
    text-decoration: none;
    display: inline-block;
    padding: 2px 6px;
    background-color: var(--accent-subtle);
    border-radius: var(--radius-sm);
    font-size: 0.86rem;
}
.cell-invoice-num:hover {
    color: var(--accent-hover);
    text-decoration: underline;
}

.customer-cell {
    display: flex;
    flex-direction: column;
}
.customer-name {
    color: var(--text-primary);
}
.customer-sub {
    font-size: 0.8rem;
    color: var(--text-muted);
}

.customer-profile-cell {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}
.customer-avatar {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: linear-gradient(135deg, #e0e7ff 0%, #c7d2fe 100%);
    color: var(--accent);
    font-weight: 700;
    font-size: 0.8rem;
    display: flex;
    align-items: center;
    justify-content: center;
}

.action-btn-group {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
}

.btn-action {
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
    padding: 0.35rem 0.65rem;
    font-size: 0.8rem;
    font-weight: 500;
    color: var(--text-secondary);
    background-color: var(--bg-surface);
    border-radius: var(--radius-sm);
    text-decoration: none;
    border: 1px solid transparent;
    transition: var(--transition);
}
.btn-action:hover {
    color: var(--text-primary);
    background-color: var(--bg-surface-hover);
    border-color: var(--border-color);
}

.btn-action-pdf {
    color: var(--accent);
    background-color: var(--accent-subtle);
}
.btn-action-pdf:hover {
    background-color: rgba(94, 106, 210, 0.15);
    color: var(--accent-hover);
}

.btn-action-delete {
    background: none;
    border: none;
    cursor: pointer;
    color: var(--text-muted);
}
.btn-action-delete:hover {
    color: var(--danger);
    background-color: var(--danger-bg);
}

/* --------------------------------------------------------------------------
   Badges & Pills
   -------------------------------------------------------------------------- */
.badge {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    padding: 0.25rem 0.65rem;
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.02em;
    line-height: 1;
}

.badge-dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
}

.badge-draft {
    background-color: #f1f5f9;
    color: #475569;
}
.badge-draft .badge-dot { background-color: #94a3b8; }

.badge-terkirim {
    background-color: var(--info-bg);
    color: var(--info-text);
}
.badge-terkirim .badge-dot { background-color: var(--info); }

.badge-lunas {
    background-color: var(--success-bg);
    color: var(--success-text);
}
.badge-lunas .badge-dot { background-color: var(--success); }

.badge-jatuh-tempo {
    background-color: var(--danger-bg);
    color: var(--danger-text);
}
.badge-jatuh-tempo .badge-dot { background-color: var(--danger); }

.badge-subtle-warning {
    background-color: var(--warning-bg);
    color: var(--warning-text);
}
.badge-subtle-success {
    background-color: var(--success-bg);
    color: var(--success-text);
}
.badge-counter {
    background-color: var(--bg-surface);
    color: var(--text-secondary);
    border-radius: var(--radius-sm);
    padding: 2px 8px;
}

/* --------------------------------------------------------------------------
   Buttons
   -------------------------------------------------------------------------- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.45rem;
    padding: 0.55rem 1rem;
    font-size: 0.9rem;
    font-weight: 600;
    border-radius: var(--radius-sm);
    cursor: pointer;
    border: 1px solid transparent;
    text-decoration: none;
    transition: var(--transition);
}

.btn-primary {
    background-color: var(--accent);
    color: #fff;
    box-shadow: 0 1px 2px rgba(94, 106, 210, 0.2);
}
.btn-primary:hover {
    background-color: var(--accent-hover);
    box-shadow: 0 3px 8px rgba(94, 106, 210, 0.3);
    transform: translateY(-1px);
}

.btn-secondary {
    background-color: var(--bg-card);
    border-color: var(--border-color);
    color: var(--text-secondary);
}
.btn-secondary:hover {
    background-color: var(--bg-surface);
    color: var(--text-primary);
}

.btn-ghost {
    background-color: transparent;
    color: var(--text-secondary);
}
.btn-ghost:hover {
    background-color: var(--bg-surface);
    color: var(--text-primary);
}

.btn-danger-ghost {
    background-color: transparent;
    border: 1px solid var(--border-color);
    color: var(--danger);
    border-radius: var(--radius-sm);
    padding: 0.55rem;
    cursor: pointer;
    transition: var(--transition);
}
.btn-danger-ghost:hover {
    background-color: var(--danger-bg);
    border-color: var(--danger-border);
}

.btn-sm {
    padding: 0.35rem 0.75rem;
    font-size: 0.82rem;
}
.btn-lg {
    padding: 0.75rem 1.5rem;
    font-size: 0.95rem;
}
.btn-block {
    width: 100%;
}

/* --------------------------------------------------------------------------
   Forms & Inputs
   -------------------------------------------------------------------------- */
.form-group {
    margin-bottom: 1.15rem;
}

.form-label {
    display: block;
    font-size: 0.86rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 0.4rem;
}
.form-label .required {
    color: var(--danger);
}

.form-control {
    width: 100%;
    padding: 0.6rem 0.85rem;
    font-size: 0.92rem;
    font-family: inherit;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    background-color: #fff;
    color: var(--text-primary);
    transition: var(--transition);
}

.form-control:focus {
    outline: none;
    border-color: var(--border-focus);
    box-shadow: 0 0 0 3px rgba(94, 106, 210, 0.15);
}

.form-control-sm {
    padding: 0.35rem 0.65rem;
    font-size: 0.82rem;
    border-radius: var(--radius-sm);
}

.form-hint {
    display: block;
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-top: 0.35rem;
}

.grid-2 {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.25rem;
}
@media (max-width: 640px) {
    .grid-2 {
        grid-template-columns: 1fr;
    }
}

.form-section-card {
    padding: 1.5rem;
    margin-bottom: 1.5rem;
}

.section-heading {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 1.25rem;
    padding-bottom: 0.65rem;
    border-bottom: 1px solid var(--border-color);
}

.new-customer-box {
    background-color: #fafbfc;
    border: 1px dashed var(--accent);
    padding: 1.25rem;
    border-radius: var(--radius-md);
    margin-top: 1rem;
    margin-bottom: 1rem;
}

.new-customer-header {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    font-weight: 600;
    color: var(--accent);
    font-size: 0.9rem;
    margin-bottom: 1rem;
}

.table-form-items th {
    padding: 0.65rem 0.85rem;
}
.table-form-items td {
    padding: 0.65rem 0.85rem;
    border-bottom: 1px solid var(--border-color);
}

.btn-remove-row {
    background: none;
    border: none;
    color: var(--text-faint);
    cursor: pointer;
    padding: 4px;
    border-radius: 4px;
    transition: var(--transition);
}
.btn-remove-row:hover {
    color: var(--danger);
    background-color: var(--danger-bg);
}

.add-item-action {
    margin-top: 1rem;
}

.calculation-breakdown {
    display: flex;
    flex-direction: column;
    gap: 0.85rem;
}

.calc-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.92rem;
}

.discount-input-row .form-control {
    max-width: 180px;
}

.tax-checkbox-row {
    padding: 0.5rem 0;
    border-top: 1px dashed var(--border-color);
    border-bottom: 1px dashed var(--border-color);
}

.checkbox-container {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    cursor: pointer;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.calc-total-row {
    padding-top: 0.75rem;
    border-top: 2px solid var(--border-color);
}
.total-title {
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--text-primary);
}
.total-amount {
    font-size: 1.45rem;
    font-weight: 700;
    color: var(--accent);
}

/* Sticky Action Bar at Bottom of Form */
.form-sticky-bar {
    position: sticky;
    bottom: 0;
    background-color: rgba(255, 255, 255, 0.92);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-top: 1px solid var(--border-color);
    padding: 0.85rem 1.25rem;
    margin: 1.5rem -1.25rem -1.5rem -1.25rem;
    box-shadow: 0 -4px 12px rgba(0, 0, 0, 0.05);
    z-index: 40;
}

.form-sticky-inner {
    max-width: 1140px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
}

.form-sticky-summary {
    display: flex;
    align-items: baseline;
    gap: 0.5rem;
}
.sticky-total-val {
    font-size: 1.35rem;
    color: var(--accent);
}

.form-sticky-actions {
    display: flex;
    gap: 0.75rem;
}

.form-narrow-container {
    max-width: 680px;
    margin: 0 auto;
}
.form-actions-row {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-top: 1.75rem;
}

/* --------------------------------------------------------------------------
   Invoice Detail / Sheet View
   -------------------------------------------------------------------------- */
.detail-header {
    margin-bottom: 1.25rem;
}

.detail-back-area {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.invoice-number-tag {
    font-size: 1.1rem;
    font-weight: 700;
    background-color: var(--accent-subtle);
    color: var(--accent);
    padding: 2px 8px;
    border-radius: var(--radius-sm);
}

.detail-actions-bar {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.invoice-sheet-container {
    max-width: 900px;
    margin: 0 auto 2.5rem auto;
}

.invoice-sheet {
    padding: 3rem;
    box-shadow: var(--shadow-sheet);
    border-radius: var(--radius-md);
    background-color: #fff;
}
@media (max-width: 640px) {
    .invoice-sheet {
        padding: 1.25rem;
    }
}

.sheet-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    padding-bottom: 2rem;
    border-bottom: 2px solid var(--border-color);
    margin-bottom: 2rem;
    gap: 1.5rem;
    flex-wrap: wrap;
}

.sheet-biz-name {
    font-size: 1.4rem;
    font-weight: 800;
    letter-spacing: -0.02em;
    color: var(--text-primary);
    margin-bottom: 0.35rem;
}

.sheet-biz-details {
    font-size: 0.88rem;
    line-height: 1.5;
}

.sheet-doc-title {
    font-size: 1.75rem;
    font-weight: 800;
    letter-spacing: 0.05em;
    color: var(--text-primary);
    line-height: 1;
    margin-bottom: 0.75rem;
}

.sheet-meta-row {
    font-size: 0.88rem;
    margin-bottom: 0.2rem;
}
.sheet-meta-row .meta-label {
    color: var(--text-muted);
    margin-right: 0.35rem;
}

.sheet-status-box {
    margin-top: 0.75rem;
}

.status-quick-form {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
}
.status-quick-label {
    font-size: 0.75rem;
    color: var(--text-muted);
    font-weight: 600;
    text-transform: uppercase;
}
.select-status-toggle {
    font-weight: 700;
    text-transform: uppercase;
    font-size: 0.78rem;
    border-color: var(--border-color);
    background-color: var(--bg-surface);
    cursor: pointer;
}

.sheet-recipient {
    background-color: #fafbfc;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    padding: 1.25rem;
    margin-bottom: 2rem;
}

.recipient-label {
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-muted);
    margin-bottom: 0.25rem;
}

.recipient-name {
    font-size: 1.15rem;
    color: var(--text-primary);
    margin-bottom: 0.25rem;
}

.recipient-details {
    font-size: 0.86rem;
    line-height: 1.45;
}

.sheet-table-wrap {
    margin-bottom: 2rem;
}

.sheet-table th {
    background-color: #0f172a;
    color: #fff;
    padding: 0.75rem 1rem;
    font-size: 0.8rem;
}

.sheet-table td {
    padding: 0.85rem 1rem;
    border-bottom: 1px solid var(--border-color);
}

.sheet-summary-grid {
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: 2rem;
    align-items: start;
}
@media (max-width: 640px) {
    .sheet-summary-grid {
        grid-template-columns: 1fr;
    }
}

.instruction-card {
    background-color: #fafbfc;
    border-left: 3px solid var(--accent);
    padding: 0.85rem 1rem;
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
    margin-bottom: 1rem;
}

.instruction-header {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    font-size: 0.8rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    color: var(--text-secondary);
    margin-bottom: 0.35rem;
}

.instruction-body {
    font-size: 0.86rem;
    color: var(--text-secondary);
    line-height: 1.45;
}

.totals-table {
    background-color: #fafbfc;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    padding: 1rem 1.25rem;
}

.tot-line {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.92rem;
    margin-bottom: 0.5rem;
}

.discount-line {
    color: var(--danger);
}

.grand-total-line {
    margin-top: 0.75rem;
    padding-top: 0.75rem;
    border-top: 2px solid var(--border-color);
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--accent);
}

/* --------------------------------------------------------------------------
   Auth (Login Screen)
   -------------------------------------------------------------------------- */
.auth-wrapper {
    min-height: calc(80vh - 120px);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem 1rem;
}

.auth-card {
    max-width: 420px;
    width: 100%;
    padding: 2.25rem;
    box-shadow: var(--shadow-lg);
    border-radius: var(--radius-md);
}

.auth-header {
    text-align: center;
    margin-bottom: 2rem;
}

.auth-logo-badge {
    width: 52px;
    height: 52px;
    margin: 0 auto 1rem auto;
    border-radius: var(--radius-md);
    background: linear-gradient(135deg, var(--accent) 0%, #3730a3 100%);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 12px rgba(94, 106, 210, 0.35);
}

.auth-title {
    font-size: 1.45rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    color: var(--text-primary);
}

.auth-subtitle {
    font-size: 0.88rem;
    color: var(--text-muted);
    margin-top: 0.35rem;
}

.input-with-icon {
    position: relative;
}

.input-icon {
    position: absolute;
    left: 12px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
    pointer-events: none;
}

.form-control-icon {
    padding-left: 38px !important;
}

/* --------------------------------------------------------------------------
   Alerts & Notifications
   -------------------------------------------------------------------------- */
.alerts {
    margin-bottom: 1.5rem;
}

.alert {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.85rem 1.15rem;
    border-radius: var(--radius-sm);
    font-size: 0.88rem;
    font-weight: 500;
    margin-bottom: 0.75rem;
    border: 1px solid transparent;
}

.alert-icon {
    display: flex;
    align-items: center;
    flex-shrink: 0;
}

.alert-success {
    background-color: var(--success-bg);
    color: var(--success-text);
    border-color: var(--success-border);
}

.alert-danger {
    background-color: var(--danger-bg);
    color: var(--danger-text);
    border-color: var(--danger-border);
}

.alert-warning {
    background-color: var(--warning-bg);
    color: var(--warning-text);
    border-color: var(--warning-border);
}

.alert-info {
    background-color: var(--info-bg);
    color: var(--info-text);
    border-color: var(--info-border);
}

/* Empty State */
.empty-state-cell {
    padding: 4rem 1rem !important;
}

.empty-state {
    text-align: center;
    max-width: 320px;
    margin: 0 auto;
}

.empty-icon {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background-color: var(--bg-surface);
    color: var(--text-muted);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1rem auto;
}

.empty-state h3 {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.25rem;
}

.empty-state p {
    font-size: 0.88rem;
    color: var(--text-muted);
    margin-bottom: 1.25rem;
}

/* Logo Preview */
.logo-upload-group {
    margin-top: 1.5rem;
}
.logo-preview-box {
    margin-bottom: 0.75rem;
    display: flex;
    align-items: center;
    gap: 1rem;
}
.logo-preview-box img {
    max-height: 70px;
    max-width: 180px;
    object-fit: contain;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    padding: 6px;
    background: #fff;
}

/* --------------------------------------------------------------------------
   Footer
   -------------------------------------------------------------------------- */
.footer {
    border-top: 1px solid var(--border-color);
    background-color: #fff;
    padding: 1.25rem;
    margin-top: auto;
}

.footer-container {
    max-width: 1140px;
    margin: 0 auto;
    text-align: center;
    font-size: 0.82rem;
    color: var(--text-muted);
}