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

:root {
    --sidebar-width: 240px;
    --sidebar-bg: #1e1e2d;
    --sidebar-hover: #2a2a3d;
    --content-bg: #f0f2f5;
    --card-bg: #ffffff;
    --text-primary: #1a1a2e;
    --text-secondary: #6b7280;
    --text-on-dark: #c2c7d0;
    --accent: #7c3aed;
    --accent-hover: #6d28d9;
    --accent-light: rgba(124, 58, 237, 0.1);
    --danger: #ef4444;
    --danger-hover: #dc2626;
    --success: #10b981;
    --border: #e5e7eb;
    --shadow: 0 1px 3px rgba(0, 0, 0, 0.08), 0 1px 2px rgba(0, 0, 0, 0.06);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.07), 0 2px 4px rgba(0, 0, 0, 0.06);
    --radius: 8px;
    --transition: 0.2s ease;
}

html {
    font-size: 14px;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: var(--content-bg);
    color: var(--text-primary);
    display: flex;
    min-height: 100vh;
    overflow-x: hidden;
}

/* ===== Sidebar ===== */
.sidebar {
    width: var(--sidebar-width);
    min-height: 100vh;
    background: var(--sidebar-bg);
    position: fixed;
    top: 0;
    left: 0;
    z-index: 100;
    display: flex;
    flex-direction: column;
    transition: transform var(--transition);
}

.sidebar-header {
    padding: 24px 20px;
    display: flex;
    align-items: center;
    gap: 12px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.logo-icon {
    font-size: 28px;
    color: var(--accent);
}

.logo-text {
    font-size: 18px;
    font-weight: 700;
    color: #ffffff;
    letter-spacing: -0.3px;
}

.sidebar-nav {
    flex: 1;
    padding: 16px 12px;
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    border-radius: 6px;
    color: var(--text-on-dark);
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
    transition: all var(--transition);
}

.nav-item:hover {
    background: var(--sidebar-hover);
    color: #ffffff;
}

.nav-item.active {
    background: var(--accent);
    color: #ffffff;
}

.nav-icon {
    font-size: 16px;
    width: 20px;
    text-align: center;
}

.sidebar-footer {
    padding: 16px 20px;
    border-top: 1px solid rgba(255, 255, 255, 0.06);
}

.version-text {
    font-size: 12px;
    color: rgba(255, 255, 255, 0.3);
}

/* ===== Mobile Header ===== */
.mobile-header {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 56px;
    background: var(--sidebar-bg);
    z-index: 90;
    align-items: center;
    padding: 0 16px;
    gap: 12px;
}

.hamburger {
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
    display: flex;
    flex-direction: column;
    gap: 5px;
}

.hamburger span {
    display: block;
    width: 22px;
    height: 2px;
    background: #ffffff;
    border-radius: 1px;
    transition: all var(--transition);
}

.mobile-title {
    font-size: 16px;
    color: #ffffff;
    font-weight: 700;
}

.sidebar-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: 95;
}

.sidebar-overlay.visible {
    display: block;
}

/* ===== Main Content ===== */
.main-content {
    margin-left: var(--sidebar-width);
    flex: 1;
    padding: 32px;
    min-height: 100vh;
}

.page-header {
    margin-bottom: 28px;
}

.page-header h2 {
    font-size: 24px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 4px;
}

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

/* ===== Stats Grid ===== */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
    margin-bottom: 28px;
}

.stat-card {
    background: var(--card-bg);
    border-radius: var(--radius);
    padding: 24px;
    box-shadow: var(--shadow);
    display: flex;
    align-items: center;
    gap: 16px;
    transition: box-shadow var(--transition);
}

.stat-card:hover {
    box-shadow: var(--shadow-md);
}

.stat-icon {
    width: 48px;
    height: 48px;
    border-radius: 10px;
    background: var(--accent-light);
    color: var(--accent);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 22px;
    flex-shrink: 0;
}

.stat-info {
    display: flex;
    flex-direction: column;
}

.stat-value {
    font-size: 24px;
    font-weight: 700;
    color: var(--text-primary);
    line-height: 1.2;
}

.stat-label {
    font-size: 13px;
    color: var(--text-secondary);
    margin-top: 2px;
}

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

.card-title {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 20px;
    color: var(--text-primary);
}

/* ===== Forms ===== */
.form-group {
    margin-bottom: 16px;
    flex: 1;
}

.form-group label {
    display: block;
    font-size: 13px;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 6px;
    text-transform: uppercase;
    letter-spacing: 0.3px;
}

.form-row {
    display: flex;
    gap: 16px;
}

input[type="text"],
input[type="url"],
select,
textarea {
    width: 100%;
    padding: 10px 14px;
    border: 1px solid var(--border);
    border-radius: 6px;
    font-size: 14px;
    font-family: inherit;
    background: #ffffff;
    color: var(--text-primary);
    transition: border-color var(--transition), box-shadow var(--transition);
}

input[type="text"]:focus,
input[type="url"]:focus,
select:focus,
textarea:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-light);
}

input[type="color"] {
    width: 100%;
    height: 40px;
    padding: 4px;
    border: 1px solid var(--border);
    border-radius: 6px;
    cursor: pointer;
    background: #ffffff;
}

textarea {
    resize: vertical;
}

/* ===== Buttons ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 10px 20px;
    border: none;
    border-radius: 6px;
    font-size: 14px;
    font-weight: 600;
    font-family: inherit;
    cursor: pointer;
    transition: all var(--transition);
    text-decoration: none;
    gap: 8px;
}

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

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

.btn-secondary {
    background: var(--content-bg);
    color: var(--text-primary);
    border: 1px solid var(--border);
}

.btn-secondary:hover {
    background: var(--border);
}

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

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

.btn-sm {
    padding: 6px 12px;
    font-size: 13px;
}

.form-actions {
    display: flex;
    gap: 12px;
    margin-top: 8px;
}

/* ===== Quick Generate Result ===== */
.quick-result {
    margin-top: 24px;
    padding-top: 24px;
    border-top: 1px solid var(--border);
    display: flex;
    align-items: center;
    gap: 24px;
}

.quick-result img {
    max-width: 200px;
    max-height: 200px;
    border-radius: 6px;
    border: 1px solid var(--border);
}

.quick-result-actions {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

/* ===== Bulk Generate ===== */
.bulk-tabs {
    display: flex;
    gap: 0;
    margin-bottom: 20px;
    border-bottom: 2px solid var(--border);
}

.bulk-tab {
    padding: 10px 20px;
    border: none;
    background: none;
    font-size: 14px;
    font-weight: 600;
    color: var(--text-secondary);
    cursor: pointer;
    border-bottom: 2px solid transparent;
    margin-bottom: -2px;
    transition: all var(--transition);
    font-family: inherit;
}

.bulk-tab.active {
    color: var(--accent);
    border-bottom-color: var(--accent);
}

.bulk-tab:hover {
    color: var(--text-primary);
}

.upload-zone {
    border: 2px dashed var(--border);
    border-radius: var(--radius);
    padding: 48px 24px;
    text-align: center;
    color: var(--text-secondary);
    transition: all var(--transition);
    cursor: pointer;
}

.upload-zone.dragover {
    border-color: var(--accent);
    background: var(--accent-light);
}

.upload-icon {
    font-size: 36px;
    margin-bottom: 12px;
    color: var(--accent);
}

.upload-link {
    color: var(--accent);
    cursor: pointer;
    text-decoration: underline;
    font-weight: 600;
}

.upload-hint {
    font-size: 12px;
    margin-top: 8px;
    color: var(--text-secondary);
}

.csv-preview {
    margin-top: 16px;
    max-height: 200px;
    overflow-y: auto;
    font-size: 13px;
    padding: 12px;
    background: var(--content-bg);
    border-radius: 6px;
    border: 1px solid var(--border);
}

.csv-preview table {
    width: 100%;
    border-collapse: collapse;
}

.csv-preview td,
.csv-preview th {
    padding: 4px 8px;
    text-align: left;
    border-bottom: 1px solid var(--border);
}

/* ===== Progress ===== */
.progress-bar {
    width: 100%;
    height: 12px;
    background: var(--content-bg);
    border-radius: 6px;
    overflow: hidden;
    margin-bottom: 12px;
}

.progress-fill {
    height: 100%;
    background: var(--accent);
    border-radius: 6px;
    width: 0%;
    transition: width 0.3s ease;
}

.progress-text {
    font-size: 13px;
    color: var(--text-secondary);
    margin-bottom: 16px;
}

/* ===== History ===== */
.history-toolbar {
    display: flex;
    gap: 12px;
    margin-bottom: 20px;
    flex-wrap: wrap;
}

.search-input {
    flex: 1;
    min-width: 200px;
}

.filter-select {
    width: 150px;
    flex-shrink: 0;
}

.table-container {
    overflow-x: auto;
}

.data-table {
    width: 100%;
    border-collapse: collapse;
}

.data-table thead {
    background: var(--content-bg);
}

.data-table th {
    padding: 12px 16px;
    text-align: left;
    font-size: 12px;
    font-weight: 700;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    border-bottom: 2px solid var(--border);
}

.data-table td {
    padding: 12px 16px;
    font-size: 14px;
    border-bottom: 1px solid var(--border);
    color: var(--text-primary);
}

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

.data-table tbody tr:hover {
    background: var(--accent-light);
}

.data-table .data-cell {
    max-width: 280px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.data-table .actions-cell {
    display: flex;
    gap: 8px;
}

.type-badge {
    display: inline-block;
    padding: 3px 10px;
    border-radius: 12px;
    font-size: 12px;
    font-weight: 600;
    text-transform: uppercase;
}

.type-badge.qr {
    background: var(--accent-light);
    color: var(--accent);
}

.type-badge.barcode {
    background: rgba(16, 185, 129, 0.1);
    color: var(--success);
}

.empty-state {
    text-align: center;
    padding: 48px 24px;
    color: var(--text-secondary);
    font-size: 14px;
}

/* ===== Settings ===== */
.setting-desc {
    color: var(--text-secondary);
    font-size: 14px;
    margin-bottom: 16px;
}

/* ===== Toast ===== */
.toast-container {
    position: fixed;
    bottom: 24px;
    right: 24px;
    z-index: 200;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.toast {
    padding: 14px 20px;
    border-radius: 6px;
    color: #ffffff;
    font-size: 14px;
    font-weight: 500;
    box-shadow: var(--shadow-md);
    animation: toastIn 0.3s ease, toastOut 0.3s ease 2.7s forwards;
    max-width: 360px;
}

.toast.success {
    background: var(--success);
}

.toast.error {
    background: var(--danger);
}

.toast.info {
    background: var(--accent);
}

@keyframes toastIn {
    from {
        opacity: 0;
        transform: translateY(16px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes toastOut {
    from {
        opacity: 1;
    }
    to {
        opacity: 0;
        transform: translateY(-8px);
    }
}

/* ===== Utility ===== */
.hidden {
    display: none !important;
}

/* ===== Responsive ===== */
@media (max-width: 1024px) {
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .sidebar {
        transform: translateX(-100%);
    }

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

    .mobile-header {
        display: flex;
    }

    .main-content {
        margin-left: 0;
        padding: 72px 16px 24px;
    }

    .stats-grid {
        grid-template-columns: 1fr 1fr;
        gap: 12px;
    }

    .stat-card {
        padding: 16px;
    }

    .stat-icon {
        width: 40px;
        height: 40px;
        font-size: 18px;
    }

    .stat-value {
        font-size: 20px;
    }

    .form-row {
        flex-direction: column;
        gap: 0;
    }

    .quick-result {
        flex-direction: column;
        align-items: flex-start;
    }

    .history-toolbar {
        flex-direction: column;
    }

    .filter-select {
        width: 100%;
    }

    .data-table th,
    .data-table td {
        padding: 10px 12px;
    }

    .page-header h2 {
        font-size: 20px;
    }

    .form-actions {
        flex-direction: column;
    }

    .bulk-tabs {
        width: 100%;
    }

    .bulk-tab {
        flex: 1;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .stats-grid {
        grid-template-columns: 1fr;
    }
}