:root {
    --primary-color: #4f46e5;
    --primary-hover: #4338ca;
    --primary-light: #eef2ff;
    --success-color: #059669;
    --success-hover: #047857;
    --success-bg: #ecfdf5;
    --warning-color: #d97706;
    --warning-bg: #fffbeb;
    --danger-color: #dc2626;
    --danger-hover: #b91c1c;
    --danger-bg: #fef2f2;
    --text-primary: #1f2937;
    --text-secondary: #4b5563;
    --text-muted: #9ca3af;
    --border-color: #e5e7eb;
    --bg-page: #f9fafb;
    --bg-card: #ffffff;
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

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

body {
    font-family: var(--font-family);
    background-color: var(--bg-page);
    color: var(--text-primary);
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
}

.hidden {
    display: none !important;
}

/* ==========================================================================
   Buttons
   ========================================================================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-weight: 500;
    font-size: 0.875rem;
    padding: 0.5rem 1rem;
    border-radius: var(--radius-md);
    border: 1px solid transparent;
    cursor: pointer;
    transition: background-color 0.15s ease-in-out, border-color 0.15s ease-in-out, box-shadow 0.15s ease-in-out;
}

.btn:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

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

.btn-primary:hover:not(:disabled) {
    background-color: var(--primary-hover);
}

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

.btn-success:hover:not(:disabled) {
    background-color: var(--success-hover);
}

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

.btn-danger:hover:not(:disabled) {
    background-color: var(--danger-hover);
}

.btn-outline {
    background-color: #ffffff;
    border-color: var(--border-color);
    color: var(--text-secondary);
}

.btn-outline:hover:not(:disabled) {
    background-color: var(--bg-page);
    border-color: var(--text-muted);
}

.btn-sm {
    padding: 0.25rem 0.625rem;
    font-size: 0.75rem;
    border-radius: var(--radius-sm);
}

.btn-block {
    width: 100%;
}

/* ==========================================================================
   Form Controls
   ========================================================================== */
.form-group {
    margin-bottom: 1rem;
}

.form-group label {
    display: block;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: 0.375rem;
}

.form-group .required {
    color: var(--danger-color);
}

.form-group input[type="text"],
.form-group input[type="password"],
.form-group input[type="email"],
.form-group input[type="number"],
.form-group input[type="file"],
.form-group select,
.form-group textarea,
.toolbar-item input,
.toolbar-item select {
    width: 100%;
    padding: 0.5rem 0.75rem;
    font-size: 0.875rem;
    color: var(--text-primary);
    background-color: #ffffff;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus,
.toolbar-item input:focus,
.toolbar-item select:focus {
    border-color: var(--primary-color);
    outline: none;
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
}

.input-disabled {
    background-color: #f3f4f6 !important;
    color: #6b7280 !important;
    cursor: not-allowed;
}

.form-help {
    display: block;
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-top: 0.25rem;
}

.form-row {
    display: flex;
    gap: 1rem;
}

.col-half {
    flex: 1;
}

.checkbox-group {
    margin-top: 0.5rem;
}

.checkbox-label {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.875rem;
    color: var(--text-secondary);
    cursor: pointer;
}

.checkbox-label input[type="checkbox"] {
    width: 1rem;
    height: 1rem;
    cursor: pointer;
}

/* ==========================================================================
   Error & Notification Messages
   ========================================================================== */
.error-message {
    padding: 0.75rem 1rem;
    background-color: var(--danger-bg);
    border: 1px solid rgba(220, 38, 38, 0.2);
    border-radius: var(--radius-md);
    color: var(--danger-color);
    font-size: 0.875rem;
    margin-bottom: 1rem;
}

.warning-text {
    font-size: 0.875rem;
    color: var(--warning-color);
    margin-top: 0.5rem;
}

.notification-container {
    position: fixed;
    top: 1rem;
    right: 1rem;
    z-index: 9999;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    max-width: 400px;
}

.toast {
    padding: 0.75rem 1.25rem;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    font-size: 0.875rem;
    font-weight: 500;
    display: flex;
    align-items: center;
    justify-content: space-between;
    animation: slideIn 0.2s ease-out;
}

.toast-success {
    background-color: var(--success-bg);
    border: 1px solid rgba(5, 150, 105, 0.3);
    color: var(--success-color);
}

.toast-danger {
    background-color: var(--danger-bg);
    border: 1px solid rgba(220, 38, 38, 0.3);
    color: var(--danger-color);
}

.toast-warning {
    background-color: var(--warning-bg);
    border: 1px solid rgba(217, 119, 6, 0.3);
    color: var(--warning-color);
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ==========================================================================
   Auth / Login View
   ========================================================================== */
#auth-view {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1.5rem;
}

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

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

.brand-logo {
    font-size: 3rem;
    line-height: 1;
    margin-bottom: 0.5rem;
}

.login-header h1 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
}

.login-header p {
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-top: 0.25rem;
}

/* ==========================================================================
   Top Navigation
   ========================================================================== */
.top-nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    background-color: var(--bg-card);
    border-bottom: 1px solid var(--border-color);
    padding: 0.75rem 1.5rem;
    box-shadow: var(--shadow-sm);
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 700;
    font-size: 1.125rem;
    color: var(--primary-color);
}

.brand-logo-small {
    font-size: 1.5rem;
}

.nav-tabs {
    display: flex;
    gap: 0.5rem;
}

.nav-tab {
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-secondary);
    background: transparent;
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all 0.15s ease;
}

.nav-tab:hover {
    background-color: var(--primary-light);
    color: var(--primary-color);
}

.nav-tab.active {
    background-color: var(--primary-color);
    color: #ffffff;
}

.nav-user {
    display: flex;
    align-items: center;
    gap: 1rem;
    font-size: 0.875rem;
    color: var(--text-secondary);
}

/* ==========================================================================
   Main Content Layout
   ========================================================================== */
.main-content {
    max-width: 1280px;
    margin: 0 auto;
    padding: 1.5rem;
}

.page-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1.5rem;
}

.page-title-block h2 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
}

.page-subtitle {
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-top: 0.25rem;
}

/* ==========================================================================
   Toolbar & Filters
   ========================================================================== */
.toolbar-card {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 1rem 1.25rem;
    margin-bottom: 1.5rem;
    box-shadow: var(--shadow-sm);
}

.toolbar-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
    gap: 1rem;
    align-items: flex-end;
}

.search-item {
    grid-column: span 2;
}

@media (max-width: 768px) {
    .search-item {
        grid-column: span 1;
    }
}

.toolbar-item label {
    display: block;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.025em;
    color: var(--text-secondary);
    margin-bottom: 0.375rem;
}

.checkbox-item {
    display: flex;
    align-items: center;
    padding-bottom: 0.5rem;
}

/* ==========================================================================
   Data Table
   ========================================================================== */
.table-card {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    overflow: hidden;
    position: relative;
}

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

.data-table {
    width: 100%;
    border-collapse: collapse;
    text-align: left;
    font-size: 0.875rem;
}

.data-table th {
    background-color: #f9fafb;
    padding: 0.75rem 1rem;
    font-weight: 600;
    color: var(--text-secondary);
    border-bottom: 1px solid var(--border-color);
    white-space: nowrap;
}

.data-table td {
    padding: 0.75rem 1rem;
    border-bottom: 1px solid var(--border-color);
    color: var(--text-primary);
    vertical-align: middle;
}

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

.data-table tr.deleted-row {
    background-color: #fef2f2;
    opacity: 0.8;
}

.th-id { width: 50px; text-align: center; }
.th-icon { width: 60px; text-align: center; }
.th-sort { width: 70px; text-align: center; }
.th-actions { width: 220px; text-align: right; }

.table-icon-preview {
    width: 36px;
    height: 36px;
    object-fit: cover;
    border-radius: var(--radius-sm);
    background-color: #f3f4f6;
    border: 1px solid var(--border-color);
    display: inline-block;
}

.table-icon-placeholder {
    width: 36px;
    height: 36px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background-color: #f3f4f6;
    border-radius: var(--radius-sm);
    color: var(--text-muted);
    font-size: 1rem;
}

/* Badges */
.badge {
    display: inline-flex;
    align-items: center;
    padding: 0.2rem 0.5rem;
    font-size: 0.75rem;
    font-weight: 600;
    border-radius: 9999px;
    line-height: 1;
}

.badge-active { background-color: var(--success-bg); color: var(--success-color); }
.badge-inactive { background-color: #f3f4f6; color: var(--text-secondary); }
.badge-archived { background-color: #fef3c7; color: #b45309; }
.badge-draft { background-color: #f3e8ff; color: #7e22ce; }
.badge-featured { background-color: #fef3c7; color: #b45309; }
.badge-deleted { background-color: var(--danger-bg); color: var(--danger-color); }
.badge-static { background-color: #e0f2fe; color: #0369a1; }
.badge-animated { background-color: #fdf4ff; color: #a21caf; }

.action-buttons {
    display: flex;
    justify-content: flex-end;
    gap: 0.35rem;
    flex-wrap: wrap;
}

/* Table Loading Overlay */
.table-loading {
    position: absolute;
    inset: 0;
    background: rgba(255, 255, 255, 0.75);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    font-weight: 500;
    color: var(--text-secondary);
}

.spinner {
    width: 24px;
    height: 24px;
    border: 3px solid var(--border-color);
    border-top-color: var(--primary-color);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

.empty-state {
    padding: 3rem 1rem;
    text-align: center;
    color: var(--text-muted);
}

.empty-icon {
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
}

/* Pagination */
.pagination-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.75rem 1.25rem;
    border-top: 1px solid var(--border-color);
    background-color: #fafafa;
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.pagination-controls {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.current-page-indicator {
    font-weight: 500;
}

/* ==========================================================================
   Modals
   ========================================================================== */
.modal {
    position: fixed;
    inset: 0;
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1rem;
}

.modal-backdrop {
    position: absolute;
    inset: 0;
    background-color: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(2px);
}

.modal-dialog {
    position: relative;
    background-color: var(--bg-card);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    width: 100%;
    max-width: 520px;
    max-height: 90vh;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    animation: modalAppear 0.15s ease-out;
}

.modal-dialog-sm { max-width: 420px; }
.modal-dialog-md { max-width: 640px; }
.modal-dialog-lg { max-width: 900px; }

@keyframes modalAppear {
    from { opacity: 0; transform: scale(0.96); }
    to { opacity: 1; transform: scale(1); }
}

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1rem 1.25rem;
    border-bottom: 1px solid var(--border-color);
}

.modal-header h3 {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--text-primary);
}

.modal-title-with-badge {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.modal-close-btn {
    background: none;
    border: none;
    font-size: 1.5rem;
    line-height: 1;
    color: var(--text-muted);
    cursor: pointer;
    padding: 0.25rem;
}

.modal-close-btn:hover {
    color: var(--text-primary);
}

.modal-body {
    padding: 1.25rem;
}

.modal-footer {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 0.75rem;
    padding: 0.75rem 1.25rem;
    border-top: 1px solid var(--border-color);
    background-color: #fafafa;
}

/* ==========================================================================
   Sticker Management UI
   ========================================================================== */
.pack-banner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: #f8fafc;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 0.875rem 1.25rem;
    margin-bottom: 1.25rem;
}

.pack-banner-info h4 {
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--text-primary);
}

.pack-banner-sub {
    font-size: 0.8125rem;
    color: var(--text-secondary);
    margin-top: 0.2rem;
}

.pack-banner-sub code {
    background: #e2e8f0;
    padding: 0.1rem 0.35rem;
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
}

.pack-banner-stats {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.stat-pill {
    display: flex;
    flex-direction: column;
    align-items: center;
    background: #ffffff;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 0.35rem 0.75rem;
}

.stat-num {
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--primary-color);
    line-height: 1.2;
}

.stat-lbl {
    font-size: 0.6875rem;
    color: var(--text-muted);
}

.stickers-grid-container {
    position: relative;
    min-height: 200px;
    max-height: 520px;
    overflow-y: auto;
    padding: 0.25rem;
}

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

.sticker-card {
    background: #ffffff;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    display: flex;
    flex-direction: column;
    transition: transform 0.15s ease, box-shadow 0.15s ease;
}

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

.sticker-img-wrap {
    position: relative;
    width: 100%;
    aspect-ratio: 1 / 1;
    background-color: #f1f5f9;
    background-image: 
        linear-gradient(45deg, #e2e8f0 25%, transparent 25%), 
        linear-gradient(-45deg, #e2e8f0 25%, transparent 25%), 
        linear-gradient(45deg, transparent 75%, #e2e8f0 75%), 
        linear-gradient(-45deg, transparent 75%, #e2e8f0 75%);
    background-size: 16px 16px;
    background-position: 0 0, 0 8px, 8px -8px, -8px 0px;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.sticker-img-wrap img {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
}

.sticker-order-badge {
    position: absolute;
    top: 6px;
    left: 6px;
    background: rgba(0, 0, 0, 0.7);
    color: #ffffff;
    font-size: 0.6875rem;
    font-weight: 700;
    padding: 0.1rem 0.4rem;
    border-radius: var(--radius-sm);
}

.sticker-card-body {
    padding: 0.75rem;
    flex: 1;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.sticker-emojis {
    font-size: 1.25rem;
    line-height: 1.2;
    margin-bottom: 0.25rem;
}

.sticker-meta {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-bottom: 0.5rem;
}

.sticker-card-actions {
    display: flex;
    gap: 0.35rem;
    margin-top: auto;
}

.tray-spec-box {
    background-color: #f0fdf4;
    border: 1px solid #bbf7d0;
    border-radius: var(--radius-md);
    padding: 0.75rem 1rem;
    font-size: 0.8125rem;
    color: #166534;
}

.tray-spec-box ul {
    margin-left: 1.25rem;
    margin-top: 0.25rem;
}

.tray-preview-container {
    margin-top: 1rem;
    text-align: center;
    padding: 1rem;
    background: #f8fafc;
    border: 1px dashed var(--border-color);
    border-radius: var(--radius-md);
}

/* Publish Check Modal */
.badge-status-lg {
    display: inline-block;
    padding: 0.5rem 1rem;
    border-radius: var(--radius-md);
    font-weight: 700;
    font-size: 1rem;
    margin-bottom: 1rem;
}

.publish-details-box {
    background: #f9fafb;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 0.875rem;
    font-size: 0.875rem;
    line-height: 1.6;
    margin-bottom: 1rem;
}

.publish-issues-container {
    background: var(--danger-bg);
    border: 1px solid rgba(220, 38, 38, 0.3);
    border-radius: var(--radius-md);
    padding: 0.875rem;
    font-size: 0.875rem;
}

.publish-issues-container h4 {
    color: var(--danger-color);
    font-size: 0.875rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.issues-list {
    margin-left: 1.25rem;
    color: var(--danger-color);
}