:root {
    --bg-primary: #f8f9fa;
    --bg-secondary: white;
    --text-primary: #333;
    --text-secondary: #666;
    --border-color: #e0e0e0;
    --accent-color: #1e3a8a;
    --accent-hover: #1e40af;
    --shadow: rgba(0, 0, 0, 0.1);
    --error-color: #ef4444;
    --success-color: #16a34a;
}

[data-theme="dark"] {
    --bg-primary: #111827;
    --bg-secondary: #1f2937;
    --panel-bg: #1f2937;
    --text-primary: #e5e7eb;
    --text-secondary: #9ca3af;
    --border-color: #4b5563;
    --accent-color: #c2410c;
    --accent-hover: #9a3412;
    --accent-light: #ea580c;
    --stats-bg: #1f2937;
    --row-even: #1f2937;
    --row-hover: #31251b;
    --shadow: rgba(0, 0, 0, 0.35);
    --empty-color: #6b7280;
    --header-bg: #1c1917;
    --header-text: #f5f5f4;
    --warning-accent: #ea580c;
}

[data-theme="dark"] .callback-banner {
    background: #3b2f14;
    color: #fdba74;
    border-color: #ea580c;
}

[data-theme="dark"] .callback-toast {
    background: #9a3412;
    color: #fffbeb;
    border-color: #ea580c;
}

[data-theme="dark"] .modal-card,
[data-theme="dark"] .edit-form-card,
[data-theme="dark"] .card,
[data-theme="dark"] .info-section,
[data-theme="dark"] .notes-section,
[data-theme="dark"] .data-table,
[data-theme="dark"] .search-section,
[data-theme="dark"] .stat-card,
[data-theme="dark"] .control-slab,
[data-theme="dark"] .calendar-shell {
    background: var(--bg-secondary);
    color: var(--text-primary);
}

[data-theme="dark"] th {
    background: #2c2117;
}

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

body {
    font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
}

.container {
    max-width: 420px;
    margin: 80px auto;
    padding: 0 20px;
}

.card {
    background: var(--bg-secondary);
    border-radius: 12px;
    box-shadow: 0 4px 16px var(--shadow);
    overflow: hidden;
}

.card-header {
    background: var(--accent-color);
    color: white;
    padding: 16px 20px;
    font-weight: 700;
}

.card-body {
    padding: 20px;
}

.logo {
    display: block;
    height: 80px;
    margin: 0 auto 16px;
}

.muted {
    color: var(--text-secondary);
    margin-bottom: 14px;
}

label {
    display: block;
    margin-bottom: 6px;
    font-weight: 600;
}

input {
    width: 100%;
    padding: 10px 12px;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    margin-bottom: 14px;
}

input:focus {
    outline: none;
    border-color: var(--accent-color);
}

#code {
    letter-spacing: 0.25rem;
    font-size: 1.1rem;
    text-align: center;
}

.btn {
    width: 100%;
    border: none;
    border-radius: 8px;
    padding: 12px 14px;
    background: var(--accent-color);
    color: white;
    font-weight: 700;
    cursor: pointer;
}

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

.btn-secondary {
    margin-top: 10px;
    background: #6b7280;
}

.btn-secondary:hover {
    background: #4b5563;
}

.error {
    margin-bottom: 12px;
    padding: 10px 12px;
    border: 1px solid #fecaca;
    border-radius: 8px;
    background: #fee2e2;
    color: #991b1b;
    font-weight: 600;
}

.success {
    margin-bottom: 12px;
    padding: 10px 12px;
    border: 1px solid #bbf7d0;
    border-radius: 8px;
    background: #dcfce7;
    color: #166534;
    font-weight: 600;
}

.theme-toggle-group {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.theme-toggle {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    border: none;
    border-radius: 20px;
    background: var(--accent-light);
    color: white;
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
}

.theme-toggle:hover {
    background: var(--accent-hover);
    transform: translateY(-1px);
}

.auth-theme-toggle {
    position: fixed;
    top: 16px;
    right: 16px;
    z-index: 50;
    display: inline-flex;
    gap: 0.5rem;
}

.auth-back-link-wrap {
    margin-top: 12px;
    text-align: center;
}

.auth-back-link {
    color: var(--accent-color);
    text-decoration: none;
    font-weight: 600;
}