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

:root {
    --white: #ffffff;
    --bg: #f5f6fa;
    --border: #e5e7eb;
    --border-light: #f0f1f5;
    --text-primary: #111827;
    --text-secondary: #6b7280;
    --text-muted: #9ca3af;
    --accent: #2563eb;
    --accent-hover: #1d4ed8;
    --accent-light: #eff6ff;
    --danger: #ef4444;
    --danger-hover: #dc2626;
    --danger-light: #fef2f2;
    --success: #22c55e;
    --success-light: #f0fdf4;
    --sidebar-w: 240px;
    --header-h: 56px;
    --radius: 10px;
    --radius-sm: 6px;
    --shadow: 0 1px 3px rgba(0, 0, 0, .08), 0 1px 2px rgba(0, 0, 0, .04);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, .08);
    --transition: 0.2s ease;
}

html {
    font-size: 15px;
    -webkit-tap-highlight-color: transparent;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--bg);
    color: var(--text-primary);
    line-height: 1.5;
    min-height: 100vh;
}

a {
    text-decoration: none;
    color: inherit;
}

img {
    display: block;
    max-width: 100%;
}

svg {
    display: block;
    stroke: currentColor;
    fill: none;
    stroke-width: 2;
    stroke-linecap: round;
    stroke-linejoin: round;
    flex-shrink: 0;
}


/* ── Layout ─────────────────────────────────────────── */

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

.main-content {
    flex: 1;
    margin-left: var(--sidebar-w);
    padding: 28px 24px 48px;
    max-width: 100%;
    min-width: 0;
}


/* ── Mobile header ───────────────────────────────────── */

.mobile-header {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--header-h);
    background: var(--white);
    border-bottom: 1px solid var(--border);
    align-items: center;
    justify-content: space-between;
    padding: 0 16px;
    z-index: 100;
    box-shadow: var(--shadow);
}

.mobile-brand {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 700;
    font-size: 1rem;
    color: var(--text-primary);
}

.mobile-brand img {
    width: 32px;
    height: 32px;
    border-radius: 6px;
    object-fit: contain;
}

.menu-trigger {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    background: var(--white);
    cursor: pointer;
    color: var(--text-secondary);
    transition: background var(--transition);
}

.menu-trigger:hover {
    background: var(--bg);
}

.menu-trigger svg {
    width: 18px;
    height: 18px;
}


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

.sidebar-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, .35);
    z-index: 200;
    opacity: 0;
    transition: opacity var(--transition);
}

.sidebar-overlay.open {
    opacity: 1;
}


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

.sidebar {
    position: fixed;
    top: 0;
    left: 0;
    width: var(--sidebar-w);
    height: 100vh;
    background: var(--white);
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    z-index: 300;
    overflow-y: auto;
    transition: transform var(--transition);
}

.sidebar-close {
    display: none;
    width: 32px;
    height: 32px;
    align-items: center;
    justify-content: center;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    background: transparent;
    cursor: pointer;
    color: var(--text-secondary);
    position: absolute;
    top: 12px;
    right: 12px;
    transition: background var(--transition);
}

.sidebar-close:hover {
    background: var(--bg);
}

.sidebar-close svg {
    width: 16px;
    height: 16px;
}

.sidebar-brand {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 20px 18px 16px;
    font-weight: 700;
    font-size: 1rem;
    color: var(--text-primary);
    border-bottom: 1px solid var(--border-light);
    margin-bottom: 8px;
}

.sidebar-brand img {
    width: 34px;
    height: 34px;
    border-radius: 7px;
    object-fit: contain;
}

.sidebar-nav {
    display: flex;
    flex-direction: column;
    padding: 4px 10px;
    gap: 2px;
    flex: 1;
}

.nav-link {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 12px;
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    font-size: .9rem;
    font-weight: 500;
    transition: background var(--transition), color var(--transition);
    cursor: pointer;
}

.nav-link svg {
    width: 18px;
    height: 18px;
    flex-shrink: 0;
}

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

.nav-link.active {
    background: var(--accent-light);
    color: var(--accent);
}

.logout-link {
    margin-top: auto;
    color: var(--danger);
}

.logout-link:hover {
    background: var(--danger-light);
    color: var(--danger-hover);
}

.sidebar-divider {
    height: 1px;
    background: var(--border-light);
    margin: 8px 10px;
}


/* ── Page header ────────────────────────────────────── */

.page-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 20px;
    flex-wrap: wrap;
    gap: 12px;
}

.page-title {
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--text-primary);
}


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

.card {
    background: var(--white);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 20px;
}


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

.btn-primary {
    display: inline-flex;
    align-items: center;
    gap: 7px;
    padding: 9px 18px;
    background: var(--accent);
    color: var(--white);
    border: none;
    border-radius: var(--radius-sm);
    font-size: .9rem;
    font-weight: 600;
    cursor: pointer;
    transition: background var(--transition);
    white-space: nowrap;
}

.btn-primary svg {
    width: 16px;
    height: 16px;
}

.btn-primary:hover {
    background: var(--accent-hover);
    color: var(--white);
}

.btn-secondary {
    display: inline-flex;
    align-items: center;
    gap: 7px;
    padding: 9px 16px;
    background: var(--white);
    color: var(--text-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    font-size: .9rem;
    font-weight: 500;
    cursor: pointer;
    transition: background var(--transition), color var(--transition);
}

.btn-secondary svg {
    width: 16px;
    height: 16px;
}

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

.btn-remove {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 7px 14px;
    background: var(--white);
    color: var(--danger);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    font-size: .85rem;
    font-weight: 500;
    cursor: pointer;
    transition: background var(--transition);
}

.btn-remove svg {
    width: 14px;
    height: 14px;
}

.btn-remove:hover {
    background: var(--danger-light);
    border-color: var(--danger);
}

.btn-action {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 34px;
    height: 34px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border);
    background: var(--white);
    color: var(--text-secondary);
    cursor: pointer;
    transition: background var(--transition), color var(--transition);
}

.btn-action svg {
    width: 15px;
    height: 15px;
}

.btn-action:hover {
    background: var(--accent-light);
    color: var(--accent);
    border-color: var(--accent);
}

.btn-action.delete {
    color: var(--danger);
}

.btn-action.delete:hover {
    background: var(--danger-light);
    border-color: var(--danger);
    color: var(--danger-hover);
}


/* ── Forms ───────────────────────────────────────────── */

.form-group {
    margin-bottom: 16px;
}

.form-group label {
    display: block;
    font-size: .85rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 6px;
    letter-spacing: .01em;
}

.form-control {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    background: var(--white);
    color: var(--text-primary);
    font-size: .9rem;
    transition: border-color var(--transition), box-shadow var(--transition);
    appearance: none;
    -webkit-appearance: none;
}

.form-control:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, .1);
}

.form-control::placeholder {
    color: var(--text-muted);
}

textarea.form-control {
    resize: vertical;
    min-height: 100px;
}

select.form-control {
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%236b7280' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 12px center;
    padding-right: 36px;
    cursor: pointer;
}

.checkbox-label {
    display: flex !important;
    align-items: center;
    gap: 8px;
    cursor: pointer;
    font-size: .9rem !important;
    font-weight: 500 !important;
    color: var(--text-primary) !important;
}

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

.form-section-title {
    font-size: 1rem;
    font-weight: 700;
    color: var(--text-primary);
    margin: 24px 0 14px;
    padding-bottom: 8px;
    border-bottom: 1px solid var(--border-light);
}

.gst-box-group {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 14px;
}

.form-actions {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-top: 8px;
    flex-wrap: wrap;
}


/* ── Dynamic items ───────────────────────────────────── */

.dynamic-item {
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 16px;
    margin-bottom: 12px;
}

.dynamic-item .form-control {
    background: var(--white);
}


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

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

table {
    width: 100%;
    border-collapse: collapse;
    font-size: .88rem;
}

thead tr {
    border-bottom: 2px solid var(--border);
}

th {
    padding: 10px 12px;
    text-align: left;
    font-size: .78rem;
    font-weight: 700;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: .04em;
    white-space: nowrap;
}

td {
    padding: 12px 12px;
    border-bottom: 1px solid var(--border-light);
    color: var(--text-primary);
    vertical-align: middle;
}

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

tbody tr:hover td {
    background: var(--bg);
}


/* ── Search ──────────────────────────────────────────── */

.search-container {
    margin-bottom: 16px;
}

.search-input {
    width: 100%;
    max-width: 340px;
    padding: 9px 12px 9px 36px;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    background: var(--bg) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='15' height='15' viewBox='0 0 24 24' fill='none' stroke='%239ca3af' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Ccircle cx='11' cy='11' r='8'%3E%3C/circle%3E%3Cline x1='21' y1='21' x2='16.65' y2='16.65'%3E%3C/line%3E%3C/svg%3E") no-repeat 11px center;
    font-size: .9rem;
    color: var(--text-primary);
    transition: border-color var(--transition), box-shadow var(--transition);
}

.search-input:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, .1);
    background-color: var(--white);
}

.search-input::placeholder {
    color: var(--text-muted);
}


/* ── Badges ──────────────────────────────────────────── */

.badge {
    display: inline-flex;
    align-items: center;
    padding: 3px 9px;
    border-radius: 20px;
    font-size: .75rem;
    font-weight: 600;
    letter-spacing: .02em;
}

.badge-success {
    background: var(--success-light);
    color: #15803d;
}

.badge-secondary {
    background: var(--bg);
    color: var(--text-muted);
    border: 1px solid var(--border);
}


/* ── Download link ───────────────────────────────────── */

.download-link {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    color: var(--accent);
    font-size: .85rem;
    font-weight: 500;
    transition: color var(--transition);
}

.download-link svg {
    width: 14px;
    height: 14px;
}

.download-link:hover {
    color: var(--accent-hover);
}


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

.login-container {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    background: var(--bg);
}

.login-card {
    width: 100%;
    max-width: 400px;
    background: var(--white);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow: var(--shadow-md);
    padding: 36px 32px 32px;
}

.login-brand {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    font-size: 1.3rem;
    font-weight: 800;
    color: var(--text-primary);
    margin-bottom: 28px;
}

.login-brand img {
    width: 40px;
    height: 40px;
    border-radius: 8px;
    object-fit: contain;
}

.login-error {
    background: var(--danger-light);
    border: 1px solid #fecaca;
    color: var(--danger-hover);
    padding: 10px 14px;
    border-radius: var(--radius-sm);
    font-size: .88rem;
    font-weight: 500;
    margin-bottom: 18px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.login-card .btn-primary {
    width: 100%;
    justify-content: center;
    padding: 11px;
    font-size: .95rem;
    margin-top: 4px;
}

.login-footer {
    text-align: center;
    margin-top: 20px;
    font-size: .82rem;
    color: var(--text-muted);
}


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

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

    .sidebar-overlay {
        display: block;
    }

    .sidebar {
        transform: translateX(-100%);
        width: 260px;
        box-shadow: var(--shadow-md);
    }

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

    .sidebar-close {
        display: flex;
    }

    .main-content {
        margin-left: 0;
        padding: 80px 14px 40px;
    }

    .gst-box-group {
        grid-template-columns: 1fr;
    }

    .page-title {
        font-size: 1.2rem;
    }

    .card {
        padding: 16px 14px;
    }

    th,
    td {
        padding: 10px 10px;
    }

    .login-card {
        padding: 28px 20px 24px;
    }

    .search-input {
        max-width: 100%;
    }

    .page-header {
        margin-bottom: 16px;
    }
}

@media (max-width: 480px) {
    .page-header {
        flex-direction: column;
        align-items: flex-start;
    }
}