@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=Prompt:wght@300;400;500;600;700&display=swap');

:root {
    --primary: #0d9488; /* Teal 600 */
    --primary-hover: #0f766e; /* Teal 700 */
    --primary-light: #ccfbf1; /* Teal 100 */
    --secondary: #4f46e5; /* Indigo 600 */
    --secondary-hover: #4338ca; /* Indigo 700 */
    --success: #10b981; /* Emerald 500 */
    --success-hover: #059669; /* Emerald 600 */
    --warning: #f59e0b; /* Amber 500 */
    --danger: #ef4444; /* Red 500 */
    --danger-hover: #dc2626; /* Red 600 */
    
    /* Backgrounds */
    --bg-gradient: linear-gradient(135deg, #0f172a 0%, #1e1b4b 100%); /* Slate 900 to Indigo 950 */
    --bg-light: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
    --card-bg: rgba(255, 255, 255, 0.95);
    --card-dark: rgba(30, 41, 59, 0.7);
    
    /* Borders & Shadows */
    --border-color: rgba(226, 232, 240, 0.8);
    --border-dark: rgba(255, 255, 255, 0.1);
    --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);
    --shadow-glow: 0 0 20px rgba(13, 148, 136, 0.2);
    
    /* Fonts */
    --font-thai: 'Prompt', sans-serif;
    --font-latin: 'Inter', sans-serif;
    
    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-normal: 0.25s ease;
}

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

body {
    font-family: var(--font-thai);
    background: var(--bg-light) no-repeat fixed;
    color: #1e293b;
    line-height: 1.6;
    min-height: 100vh;
    padding: 2rem 1rem;
    display: flex;
    flex-direction: column;
    align-items: center;
}

body.bg-dark-theme {
    background: var(--bg-gradient);
    color: #f1f5f9;
}

.container {
    width: 100%;
    max-width: 800px;
    margin: 0 auto;
}

.container-wide {
    max-width: 1440px;
}

/* Glassmorphism Card Layouts */
.card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 1.25rem;
    padding: 2rem;
    box-shadow: var(--shadow-lg);
    margin-bottom: 2rem;
    backdrop-filter: blur(10px);
    transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}

body.bg-dark-theme .card {
    background: var(--card-dark);
    border: 1px solid var(--border-dark);
    box-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.3);
}

.card:hover {
    box-shadow: var(--shadow-lg), var(--shadow-glow);
}

/* Typography */
h1 {
    font-size: 2rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 0.5rem;
    background: linear-gradient(135deg, #0f766e 0%, #4338ca 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

body.bg-dark-theme h1 {
    background: linear-gradient(135deg, #2dd4bf 0%, #818cf8 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

h2 {
    font-size: 1.35rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
    color: #0f172a;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

body.bg-dark-theme h2 {
    color: #f8fafc;
}

.subtitle {
    text-align: center;
    color: #64748b;
    margin-bottom: 2.5rem;
    font-size: 1rem;
}

body.bg-dark-theme .subtitle {
    color: #94a3b8;
}

/* Form Controls */
.form-group {
    margin-bottom: 1.5rem;
    position: relative;
}

label {
    display: block;
    font-weight: 500;
    margin-bottom: 0.5rem;
    color: #475569;
}

body.bg-dark-theme label {
    color: #cbd5e1;
}

.input-control {
    width: 100%;
    padding: 0.75rem 1rem;
    border-radius: 0.75rem;
    border: 2px solid var(--border-color);
    font-family: var(--font-thai);
    font-size: 1rem;
    background: white;
    color: #1e293b;
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

body.bg-dark-theme .input-control {
    background: rgba(15, 23, 42, 0.6);
    border-color: rgba(255, 255, 255, 0.15);
    color: white;
}

.input-control:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 4px rgba(13, 148, 136, 0.15);
}

/* Custom Autocomplete Combobox */
.combobox-container {
    position: relative;
}

.combobox-results {
    position: absolute;
    top: 105%;
    left: 0;
    right: 0;
    background: white;
    border: 1px solid var(--border-color);
    border-radius: 0.75rem;
    max-height: 250px;
    overflow-y: auto;
    z-index: 100;
    box-shadow: var(--shadow-lg);
    display: none;
}

body.bg-dark-theme .combobox-results {
    background: #1e293b;
    border-color: rgba(255, 255, 255, 0.15);
}

.combobox-item {
    padding: 0.75rem 1rem;
    cursor: pointer;
    transition: background-color var(--transition-fast);
}

.combobox-item:hover {
    background-color: var(--primary-light);
    color: var(--primary-hover);
}

body.bg-dark-theme .combobox-item:hover {
    background-color: rgba(13, 148, 136, 0.2);
    color: #2dd4bf;
}

.combobox-item .name {
    font-weight: 500;
    display: block;
}

.combobox-item .meta {
    font-size: 0.8rem;
    color: #64748b;
    display: block;
    margin-top: 0.2rem;
}

body.bg-dark-theme .combobox-item .meta {
    color: #94a3b8;
}

.combobox-no-results {
    padding: 1rem;
    text-align: center;
    color: #64748b;
}

/* Trainee Details Card (Appears after name selection) */
.trainee-details-box {
    background: #f1f5f9;
    border-radius: 0.75rem;
    padding: 1rem 1.25rem;
    margin-top: 1rem;
    border-left: 4px solid var(--primary);
    display: none;
}

body.bg-dark-theme .trainee-details-box {
    background: rgba(15, 23, 42, 0.4);
    border-left-color: var(--primary);
}

.trainee-details-box p {
    font-size: 0.95rem;
    margin-bottom: 0.3rem;
}

.trainee-details-box p:last-child {
    margin-bottom: 0;
}

.trainee-details-box strong {
    color: #334155;
}

body.bg-dark-theme .trainee-details-box strong {
    color: #e2e8f0;
}

/* Session Slot Select Grid */
.slots-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.slot-card {
    border: 2px solid var(--border-color);
    border-radius: 0.75rem;
    padding: 1rem;
    cursor: pointer;
    background: white;
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
}

body.bg-dark-theme .slot-card {
    background: rgba(15, 23, 42, 0.4);
    border-color: rgba(255, 255, 255, 0.1);
}

.slot-card:hover:not(.disabled) {
    border-color: var(--primary);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.slot-card.selected {
    border-color: var(--primary);
    background-color: var(--primary-light);
    color: var(--primary-hover);
    box-shadow: 0 0 12px rgba(13, 148, 136, 0.2);
}

body.bg-dark-theme .slot-card.selected {
    background-color: rgba(13, 148, 136, 0.15);
    border-color: #2dd4bf;
    color: #2dd4bf;
}

.slot-card.disabled {
    opacity: 0.5;
    cursor: not-allowed;
    background: #f1f5f9;
}

body.bg-dark-theme .slot-card.disabled {
    background: rgba(15, 23, 42, 0.8);
}

.slot-card .time-status {
    font-size: 0.75rem;
    display: inline-block;
    padding: 0.15rem 0.5rem;
    border-radius: 9999px;
    font-weight: 500;
    margin-top: 0.5rem;
}

.time-status.closed {
    background: #fee2e2;
    color: #ef4444;
}

body.bg-dark-theme .time-status.closed {
    background: rgba(239, 68, 68, 0.2);
    color: #fca5a5;
}

.time-status.open {
    background: #d1fae5;
    color: #065f46;
}

body.bg-dark-theme .time-status.open {
    background: rgba(16, 185, 129, 0.2);
    color: #a7f3d0;
}

.time-status.upcoming {
    background: #fef3c7;
    color: #92400e;
}

body.bg-dark-theme .time-status.upcoming {
    background: rgba(245, 158, 11, 0.2);
    color: #fde68a;
}

.time-status.registered {
    background: #e0f2fe;
    color: #0369a1;
}

body.bg-dark-theme .time-status.registered {
    background: rgba(3, 105, 161, 0.2);
    color: #7dd3fc;
}

.slot-card .name-slot {
    font-weight: 600;
    font-size: 1rem;
    display: block;
}

.slot-card .range-slot {
    font-size: 0.85rem;
    color: #64748b;
    display: block;
    margin-top: 0.15rem;
}

body.bg-dark-theme .slot-card .range-slot {
    color: #94a3b8;
}

/* Admin Override Switch */
.override-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: #fef3c7;
    border: 1px solid #fde68a;
    border-radius: 0.75rem;
    padding: 0.75rem 1rem;
    margin-bottom: 1.5rem;
}

body.bg-dark-theme .override-container {
    background: rgba(245, 158, 11, 0.1);
    border-color: rgba(245, 158, 11, 0.25);
}

.override-label {
    display: flex;
    flex-direction: column;
}

.override-label span:first-child {
    font-weight: 600;
    color: #b45309;
    font-size: 0.95rem;
}

body.bg-dark-theme .override-label span:first-child {
    color: #fcd34d;
}

.override-label span:last-child {
    font-size: 0.8rem;
    color: #d97706;
}

body.bg-dark-theme .override-label span:last-child {
    color: #fbbf24;
}

/* Custom Switch Styling */
.switch {
    position: relative;
    display: inline-block;
    width: 50px;
    height: 28px;
}

.switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: #cbd5e1;
    transition: .4s;
    border-radius: 34px;
}

.slider:before {
    position: absolute;
    content: "";
    height: 20px;
    width: 20px;
    left: 4px;
    bottom: 4px;
    background-color: white;
    transition: .4s;
    border-radius: 50%;
}

input:checked + .slider {
    background-color: var(--primary);
}

input:checked + .slider:before {
    transform: translateX(22px);
}

/* Signature Pad Area */
.signature-area {
    margin-bottom: 1.5rem;
}

.canvas-container {
    position: relative;
    width: 100%;
    height: 200px;
    background: #ffffff;
    border: 2px dashed #cbd5e1;
    border-radius: 0.75rem;
    overflow: hidden;
    touch-action: none; /* Prevents scrolling while signing */
}

body.bg-dark-theme .canvas-container {
    background: #0f172a;
    border-color: rgba(255, 255, 255, 0.2);
}

.canvas-container.error-border {
    border-color: var(--danger);
}

canvas {
    width: 100%;
    height: 100%;
    cursor: crosshair;
}

.canvas-tools {
    display: flex;
    justify-content: flex-end;
    gap: 0.75rem;
    margin-top: 0.5rem;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.6rem 1.25rem;
    border-radius: 0.5rem;
    font-family: var(--font-thai);
    font-size: 0.95rem;
    font-weight: 500;
    cursor: pointer;
    border: none;
    transition: all var(--transition-fast);
}

.btn-sm {
    padding: 0.4rem 0.85rem;
    font-size: 0.85rem;
    border-radius: 0.375rem;
}

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

.btn-primary:hover:not(:disabled) {
    background-color: var(--primary-hover);
    box-shadow: 0 4px 12px rgba(13, 148, 136, 0.2);
}

.btn-secondary {
    background-color: #e2e8f0;
    color: #475569;
}

.btn-secondary:hover:not(:disabled) {
    background-color: #cbd5e1;
}

body.bg-dark-theme .btn-secondary {
    background-color: #334155;
    color: #e2e8f0;
}

body.bg-dark-theme .btn-secondary:hover:not(:disabled) {
    background-color: #475569;
}

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

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

.btn-upload {
    background-color: #f0fdfa;
    color: var(--primary-hover);
    border: 2px dashed var(--primary);
    font-weight: 600;
}

.btn-upload:hover:not(:disabled) {
    background-color: #ccfbf1;
    border-style: solid;
}

body.bg-dark-theme .btn-upload {
    background-color: rgba(13, 148, 136, 0.1);
    color: #2dd4bf;
    border-color: #2dd4bf;
}

body.bg-dark-theme .btn-upload:hover:not(:disabled) {
    background-color: rgba(13, 148, 136, 0.2);
}

#backToRegBtn:hover {
    background: linear-gradient(135deg, #4f46e5, #7c3aed) !important;
    box-shadow: 0 4px 16px rgba(99, 102, 241, 0.45) !important;
    transform: translateY(-1px);
}

.btn-block {
    width: 100%;
    padding: 0.85rem;
    font-size: 1.1rem;
    border-radius: 0.75rem;
}

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

/* Attendee Status Board (Show registered rounds) */
.status-board {
    margin-top: 1.5rem;
    border-top: 1px solid var(--border-color);
    padding-top: 1.5rem;
    display: none;
}

body.bg-dark-theme .status-board {
    border-top-color: var(--border-dark);
}

.status-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 0.75rem;
    margin-top: 0.75rem;
}

.status-badge {
    background: #f1f5f9;
    border-radius: 0.5rem;
    padding: 0.75rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: 0.85rem;
}

body.bg-dark-theme .status-badge {
    background: rgba(15, 23, 42, 0.4);
}

.status-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    display: inline-block;
}

.status-dot.registered {
    background: var(--success);
    box-shadow: 0 0 8px var(--success);
}

.status-dot.empty {
    background: #cbd5e1;
}

body.bg-dark-theme .status-dot.empty {
    background: #475569;
}

/* Modals */
.modal-backdrop {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(15, 23, 42, 0.6);
    backdrop-filter: blur(4px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--transition-normal);
}

.modal-backdrop.active {
    opacity: 1;
    pointer-events: auto;
}

.modal {
    background: white;
    border-radius: 1.25rem;
    width: 90%;
    max-width: 450px;
    padding: 2rem;
    box-shadow: var(--shadow-lg);
    transform: scale(0.9);
    transition: transform var(--transition-normal);
}

body.bg-dark-theme .modal {
    background: #1e293b;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.modal-backdrop.active .modal {
    transform: scale(1);
}

.modal h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 1rem;
}

.modal p {
    color: #64748b;
    font-size: 0.95rem;
    margin-bottom: 1.5rem;
}

body.bg-dark-theme .modal p {
    color: #cbd5e1;
}

.modal-actions {
    display: flex;
    justify-content: flex-end;
    gap: 0.75rem;
}

/* Success Animation in Modal */
.success-checkmark {
    width: 80px;
    height: 80px;
    margin: 0 auto 1.5rem;
    position: relative;
}

.success-checkmark .check-icon {
    width: 80px;
    height: 80px;
    position: relative;
    border-radius: 50%;
    box-sizing: content-box;
    border: 4px solid var(--success);
}

.success-checkmark .check-icon::after {
    /* checkmark icon */
    content: '';
    position: absolute;
    top: 10px;
    left: 28px;
    width: 18px;
    height: 32px;
    border-right: 4px solid var(--success);
    border-bottom: 4px solid var(--success);
    transform: rotate(45deg);
    transform-origin: 0% 100%;
    animation: checkmark 0.4s ease-in-out;
}

@keyframes checkmark {
    0% {
        height: 0;
        width: 0;
        opacity: 0;
    }
    40% {
        height: 0;
        width: 18px;
        opacity: 1;
    }
    100% {
        height: 32px;
        width: 18px;
        opacity: 1;
    }
}

/* Toast System */
.toast-container {
    position: fixed;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
    z-index: 2000;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    width: 90%;
    max-width: 400px;
}

.toast {
    background: #1e293b;
    color: white;
    border-radius: 0.5rem;
    padding: 0.75rem 1.25rem;
    box-shadow: var(--shadow-lg);
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 0.9rem;
    animation: toast-fade-in 0.3s ease-out forwards;
    border-left: 4px solid #94a3b8;
}

.toast.toast-success {
    border-left-color: var(--success);
}

.toast.toast-danger {
    border-left-color: var(--danger);
}

.toast.toast-warning {
    border-left-color: var(--warning);
}

@keyframes toast-fade-in {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.toast.hide {
    animation: toast-fade-out 0.3s ease-in forwards;
}

@keyframes toast-fade-out {
    from {
        opacity: 1;
        transform: translateY(0);
    }
    to {
        opacity: 0;
        transform: translateY(20px);
    }
}

/* Spinner */
.spinner {
    border: 3px solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    border-top: 3px solid white;
    width: 20px;
    height: 20px;
    animation: spin 1s linear infinite;
    display: inline-block;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* Admin Dashboard Elements */
.admin-metrics {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.25rem;
    margin-bottom: 2rem;
}

.metric-card {
    background: white;
    border: 1px solid var(--border-color);
    border-radius: 0.75rem;
    padding: 1.25rem;
    box-shadow: var(--shadow-sm);
    display: flex;
    flex-direction: column;
}

body.bg-dark-theme .metric-card {
    background: var(--card-dark);
    border-color: var(--border-dark);
}

.metric-title {
    font-size: 0.85rem;
    color: #64748b;
    font-weight: 500;
}

body.bg-dark-theme .metric-title {
    color: #cbd5e1;
}

.metric-value {
    font-family: var(--font-latin);
    font-size: 1.75rem;
    font-weight: 700;
    margin: 0.25rem 0;
    color: #0f172a;
}

body.bg-dark-theme .metric-value {
    color: white;
}

.metric-sub {
    font-size: 0.75rem;
    color: #94a3b8;
}

/* Admin Table Filters */
.filters-row {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.search-wrapper {
    flex: 1;
    min-width: 250px;
}

.filter-wrapper {
    min-width: 180px;
}

/* Data Table Styles */
.table-responsive {
    width: 100%;
    overflow-x: auto;
    border-radius: 0.75rem;
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
}

body.bg-dark-theme .table-responsive {
    border-color: var(--border-dark);
}

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

body.bg-dark-theme table {
    background: rgba(15, 23, 42, 0.4);
}

th {
    background-color: #f1f5f9;
    color: #475569;
    font-weight: 600;
    padding: 0.75rem 1rem;
    white-space: nowrap;
    border-bottom: 2px solid var(--border-color);
}

body.bg-dark-theme th {
    background-color: #1e293b;
    color: #e2e8f0;
    border-bottom-color: var(--border-dark);
}

/* Double headers for groups */
th.group-header {
    text-align: center;
    border-bottom: 1px solid var(--border-color);
}

th.group-blue {
    background-color: #e0f2fe;
    color: #0369a1;
}

body.bg-dark-theme th.group-blue {
    background-color: rgba(3, 105, 161, 0.2);
    color: #38bdf8;
}

th.group-red {
    background-color: #fee2e2;
    color: #b91c1c;
}

body.bg-dark-theme th.group-red {
    background-color: rgba(185, 28, 28, 0.2);
    color: #fca5a5;
}

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

body.bg-dark-theme td {
    border-bottom-color: var(--border-dark);
}

tr:hover {
    background-color: #f8fafc;
}

body.bg-dark-theme tr:hover {
    background-color: rgba(255, 255, 255, 0.02);
}

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

/* Signature Cell Viewer */
.sig-cell-status {
    text-align: center;
}

.sig-link, .cert-link {
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
    color: var(--primary);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.85rem;
}

.sig-link:hover, .cert-link:hover {
    text-decoration: underline;
}

.status-no-sig {
    color: #94a3b8;
    font-size: 0.8rem;
    font-style: italic;
}

/* Inline Checkbox Cell */
.check-cell {
    text-align: center;
}

.checkbox-custom-wrap {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    position: relative;
    cursor: pointer;
}

.checkbox-custom-wrap input {
    position: absolute;
    opacity: 0;
    cursor: pointer;
    height: 0;
    width: 0;
}

.checkbox-checkmark {
    height: 22px;
    width: 22px;
    background-color: #e2e8f0;
    border-radius: 0.375rem;
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
}

body.bg-dark-theme .checkbox-checkmark {
    background-color: #334155;
}

.checkbox-custom-wrap:hover input ~ .checkbox-checkmark {
    background-color: #cbd5e1;
}

body.bg-dark-theme .checkbox-custom-wrap:hover input ~ .checkbox-checkmark {
    background-color: #475569;
}

.checkbox-custom-wrap input:checked ~ .checkbox-checkmark {
    background-color: var(--success);
}

.checkbox-checkmark:after {
    content: "";
    display: none;
    width: 5px;
    height: 10px;
    border: solid white;
    border-width: 0 2px 2px 0;
    transform: rotate(45deg);
    margin-bottom: 2px;
}

.checkbox-custom-wrap input:checked ~ .checkbox-checkmark:after {
    display: block;
}

/* Inline loading for cell update */
.cell-loading {
    display: none;
    width: 16px;
    height: 16px;
    border: 2px solid rgba(0, 0, 0, 0.1);
    border-top-color: var(--success);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

body.bg-dark-theme .cell-loading {
    border-color: rgba(255, 255, 255, 0.1);
    border-top-color: var(--success);
}

.loading-active .checkbox-checkmark {
    display: none;
}

.loading-active .cell-loading {
    display: block;
}

/* Settings Bar (for sheet URL configuration) */
.settings-bar {
    background: #f1f5f9;
    border-radius: 0.75rem;
    padding: 1rem;
    margin-bottom: 2rem;
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
}

body.bg-dark-theme .settings-bar {
    background: rgba(15, 23, 42, 0.4);
    border: 1px solid var(--border-dark);
}

.settings-input-group {
    display: flex;
    gap: 0.5rem;
    flex: 1;
    min-width: 300px;
}

.settings-info {
    font-size: 0.85rem;
    color: #64748b;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

body.bg-dark-theme .settings-info {
    color: #cbd5e1;
}

.badge-demo {
    background: #fef3c7;
    color: #d97706;
    font-weight: 600;
    padding: 0.15rem 0.5rem;
    border-radius: 0.25rem;
    font-size: 0.75rem;
    border: 1px solid #fcd34d;
}

.badge-connected {
    background: #d1fae5;
    color: #065f46;
    font-weight: 600;
    padding: 0.15rem 0.5rem;
    border-radius: 0.25rem;
    font-size: 0.75rem;
    border: 1px solid #a7f3d0;
}

/* Light/Dark Theme Switch */
.theme-toggle {
    position: fixed;
    top: 1rem;
    right: 1rem;
    z-index: 1001;
    background: white;
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-md);
    border-radius: 50%;
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all var(--transition-fast);
}

body.bg-dark-theme .theme-toggle {
    background: #1e293b;
    border-color: rgba(255, 255, 255, 0.15);
    color: white;
}

.theme-toggle:hover {
    transform: scale(1.05);
}

/* Media Queries */
@media (max-width: 640px) {
    .slots-grid, .status-grid {
        grid-template-columns: 1fr;
    }
    
    .filters-row {
        flex-direction: column;
    }
    
    .search-wrapper, .filter-wrapper {
        width: 100%;
    }
    
    .settings-bar {
        flex-direction: column;
        align-items: stretch;
    }
    
    .settings-input-group {
        min-width: 100%;
    }
}

/* Print Styles */
@media print {
    body, body.bg-dark-theme {
        background: white !important;
        color: black !important;
        padding: 0 !important;
    }
    
    .theme-toggle,
    .settings-bar,
    header div, /* hide go back link */
    .admin-metrics,
    .no-print, /* utility class to hide elements during printing */
    .toast-container {
        display: none !important;
    }
    
    .container, .container-wide {
        max-width: 100% !important;
        width: 100% !important;
        margin: 0 !important;
        padding: 0 !important;
    }
    
    .card {
        background: transparent !important;
        border: none !important;
        box-shadow: none !important;
        padding: 0 !important;
        margin: 0 !important;
    }
    
    h1 {
        background: none !important;
        -webkit-text-fill-color: initial !important;
        color: black !important;
        font-size: 1.6rem !important;
        margin-bottom: 0.2rem !important;
    }
    
    .subtitle {
        color: #555 !important;
        margin-bottom: 1.5rem !important;
    }
    
    table {
        border: 1px solid #000 !important;
    }
    
    th, td {
        border-color: #000 !important;
        color: black !important;
        font-size: 0.75rem !important;
        padding: 0.4rem 0.6rem !important;
    }
    
    th {
        background-color: #f1f5f9 !important;
        -webkit-print-color-adjust: exact;
        print-color-adjust: exact;
    }
    
    th.group-blue {
        background-color: #e0f2fe !important;
    }
    
    th.group-red {
        background-color: #fee2e2 !important;
    }
    
    .sig-link, .cert-link {
        color: #000 !important;
        text-decoration: underline !important;
    }
    
    /* Display checkbox states clearly in print */
    .checkbox-checkmark {
        border: 1px solid #000 !important;
        background-color: transparent !important;
    }
    
    .checkbox-custom-wrap input:checked ~ .checkbox-checkmark {
        background-color: #000 !important;
    }
    
    .checkbox-custom-wrap input:checked ~ .checkbox-checkmark:after {
        border-color: #fff !important;
    }
}