/* ============================================================
   Admin Panel — Dark Theme Styles
   Consistent with Voice Robot UI (static/css/style.css)
   ============================================================ */

/* ------------------------------------------------------------
   1. CSS Variables — Reuse main UI color palette
   ------------------------------------------------------------ */
:root {
    --primary: #6366f1;
    --primary-light: #818cf8;
    --primary-dark: #4f46e5;
    --accent: #22d3ee;
    --success: #10b981;
    --warning: #f59e0b;
    --error: #ef4444;
    --bg-dark: #0f172a;
    --bg-card: rgba(30, 41, 59, 0.8);
    --bg-glass: rgba(255, 255, 255, 0.05);
    --text: #f1f5f9;
    --text-muted: #94a3b8;
    --border: rgba(255, 255, 255, 0.1);
    --shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
    --gradient: linear-gradient(135deg, #6366f1 0%, #8b5cf6 50%, #d946ef 100%);

    --sidebar-width: 260px;
    --transition: 0.2s ease;
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--bg-dark);
    color: var(--text);
    min-height: 100vh;
    min-width: 1024px;
    overflow-x: hidden;
}

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

/* ------------------------------------------------------------
   3. Layout — Sidebar + Main Content
   ------------------------------------------------------------ */
.admin-layout {
    display: flex;
    min-height: 100vh;
}

/* ------------------------------------------------------------
   4. Sidebar
   ------------------------------------------------------------ */
.sidebar {
    position: fixed;
    top: 0;
    left: 0;
    width: var(--sidebar-width);
    height: 100vh;
    background: rgba(15, 23, 42, 0.95);
    backdrop-filter: blur(20px);
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    z-index: 100;
}

.sidebar-header {
    padding: 1.5rem;
    border-bottom: 1px solid var(--border);
}

.sidebar-brand {
    font-size: 1.5rem;
    font-weight: 700;
    background: var(--gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.sidebar-subtitle {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-top: 0.25rem;
    letter-spacing: 0.5px;
    text-transform: uppercase;
}

/* Sidebar Navigation */
.sidebar-nav {
    flex: 1;
    padding: 1rem 0.75rem;
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
    overflow-y: auto;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 1rem;
    border-radius: 10px;
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-muted);
    transition: all var(--transition);
    cursor: pointer;
}

.nav-item:hover {
    background: var(--bg-glass);
    color: var(--text);
}

.nav-item.active {
    background: rgba(99, 102, 241, 0.15);
    color: var(--primary-light);
    border-left: 3px solid var(--primary);
}

.nav-icon {
    font-size: 1.1rem;
    width: 24px;
    text-align: center;
    flex-shrink: 0;
}

.nav-label {
    white-space: nowrap;
}

/* Sidebar Footer */
.sidebar-footer {
    padding: 0.75rem;
    border-top: 1px solid var(--border);
}

.sidebar-footer .nav-item {
    color: var(--text-muted);
    font-size: 0.85rem;
}

.sidebar-footer .nav-item:hover {
    color: var(--accent);
}

/* ------------------------------------------------------------
   5. Main Content Area
   ------------------------------------------------------------ */
.main-content {
    margin-left: var(--sidebar-width);
    flex: 1;
    padding: 2rem;
    min-height: 100vh;
    overflow-y: auto;
}

/* Page Header */
.page-header {
    margin-bottom: 2rem;
}

.page-header h1 {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--text);
    background: none;
    -webkit-text-fill-color: var(--text);
}

.page-header .page-subtitle {
    font-size: 0.9rem;
    color: var(--text-muted);
    margin-top: 0.375rem;
}

/* ------------------------------------------------------------
   6. Cards — Glassmorphism
   ------------------------------------------------------------ */
.card {
    background: var(--bg-card);
    backdrop-filter: blur(20px);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 1.5rem;
    box-shadow: var(--shadow);
    margin-bottom: 1.5rem;
}

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

.card-header h2 {
    font-size: 1.1rem;
    font-weight: 600;
}

.card-header h3 {
    font-size: 1rem;
    font-weight: 600;
}

/* ------------------------------------------------------------
   7. Form Controls
   ------------------------------------------------------------ */
.form-group {
    margin-bottom: 1.25rem;
}

.form-label {
    display: block;
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text-muted);
    margin-bottom: 0.5rem;
}

.form-input,
.form-select,
.form-textarea {
    width: 100%;
    background: var(--bg-glass);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 0.75rem 1rem;
    color: var(--text);
    font-family: inherit;
    font-size: 0.9rem;
    outline: none;
    transition: border-color var(--transition), box-shadow var(--transition);
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.2);
}

.form-input::placeholder,
.form-textarea::placeholder {
    color: var(--text-muted);
    opacity: 0.6;
}

.form-select {
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%2394a3b8' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 1rem center;
    padding-right: 2.5rem;
    cursor: pointer;
}

.form-select option {
    background: #1e293b;
    color: var(--text);
}

.form-textarea {
    resize: vertical;
    min-height: 120px;
    line-height: 1.6;
}

/* Range Slider */
.form-range {
    width: 100%;
    height: 6px;
    appearance: none;
    background: var(--border);
    border-radius: 3px;
    outline: none;
    cursor: pointer;
}

.form-range::-webkit-slider-thumb {
    appearance: none;
    width: 18px;
    height: 18px;
    background: var(--primary);
    border-radius: 50%;
    cursor: pointer;
    transition: transform var(--transition), box-shadow var(--transition);
}

.form-range::-webkit-slider-thumb:hover {
    transform: scale(1.2);
    box-shadow: 0 0 0 4px rgba(99, 102, 241, 0.25);
}

.form-range::-moz-range-thumb {
    width: 18px;
    height: 18px;
    background: var(--primary);
    border: none;
    border-radius: 50%;
    cursor: pointer;
}

/* Form Hint */
.form-hint {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-top: 0.375rem;
    opacity: 0.8;
}

/* ------------------------------------------------------------
   8. Buttons
   ------------------------------------------------------------ */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 10px;
    font-family: inherit;
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition);
    white-space: nowrap;
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

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

.btn-primary:hover:not(:disabled) {
    transform: translateY(-1px);
    box-shadow: 0 8px 25px rgba(99, 102, 241, 0.4);
}

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

.btn-secondary:hover:not(:disabled) {
    background: var(--bg-glass);
    border-color: var(--primary);
    color: var(--primary-light);
}

.btn-danger {
    background: rgba(239, 68, 68, 0.15);
    color: var(--error);
    border: 1px solid rgba(239, 68, 68, 0.3);
}

.btn-danger:hover:not(:disabled) {
    background: rgba(239, 68, 68, 0.25);
    border-color: var(--error);
}

.btn-sm {
    padding: 0.5rem 1rem;
    font-size: 0.8rem;
    border-radius: 8px;
}

/* ------------------------------------------------------------
   9. Tables
   ------------------------------------------------------------ */
.data-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.875rem;
}

.data-table thead th {
    text-align: left;
    padding: 0.75rem 1rem;
    font-weight: 600;
    font-size: 0.8rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    border-bottom: 1px solid var(--border);
}

.data-table tbody td {
    padding: 0.75rem 1rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    color: var(--text);
    vertical-align: middle;
}

.data-table tbody tr:nth-child(even) {
    background: rgba(255, 255, 255, 0.02);
}

.data-table tbody tr:hover {
    background: rgba(99, 102, 241, 0.08);
}

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

/* ------------------------------------------------------------
   10. Status Indicators
   ------------------------------------------------------------ */
.status-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.375rem;
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.3px;
}

.status-badge.success {
    background: rgba(16, 185, 129, 0.15);
    color: var(--success);
}

.status-badge.error {
    background: rgba(239, 68, 68, 0.15);
    color: var(--error);
}

.status-badge.warning {
    background: rgba(245, 158, 11, 0.15);
    color: var(--warning);
}

.status-dot {
    display: inline-block;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--text-muted);
}

.status-dot.success {
    background: var(--success);
}

.status-dot.error {
    background: var(--error);
}

.status-dot.warning {
    background: var(--warning);
}

/* ------------------------------------------------------------
   11. Toast Notifications
   ------------------------------------------------------------ */
.toast-container {
    position: fixed;
    bottom: 1.5rem;
    right: 1.5rem;
    z-index: 9999;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    pointer-events: none;
}

.toast {
    background: var(--bg-card);
    backdrop-filter: blur(20px);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 1rem 1.25rem;
    min-width: 300px;
    max-width: 420px;
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.4);
    pointer-events: auto;
    animation: toastSlideIn 0.3s ease-out forwards;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 0.9rem;
}

.toast.toast-dismiss {
    animation: toastSlideOut 0.3s ease-in forwards;
}

.toast-success {
    border-left: 3px solid var(--success);
}

.toast-error {
    border-left: 3px solid var(--error);
}

.toast-warning {
    border-left: 3px solid var(--warning);
}

@keyframes toastSlideIn {
    from {
        opacity: 0;
        transform: translateX(100%);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes toastSlideOut {
    from {
        opacity: 1;
        transform: translateX(0);
    }
    to {
        opacity: 0;
        transform: translateX(100%);
    }
}

/* Auto-dismiss: toast fades after 3 seconds */
.toast-auto {
    animation: toastSlideIn 0.3s ease-out forwards,
               toastSlideOut 0.3s ease-in 2.7s forwards;
}

/* ------------------------------------------------------------
   12. Dashboard — Stats Grid
   ------------------------------------------------------------ */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.stat-card {
    background: var(--bg-card);
    backdrop-filter: blur(20px);
    border: 1px solid var(--border);
    border-radius: 14px;
    padding: 1.25rem;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    transition: border-color var(--transition);
}

.stat-card:hover {
    border-color: rgba(99, 102, 241, 0.3);
}

.stat-value {
    font-size: 2rem;
    font-weight: 700;
    line-height: 1;
    color: var(--text);
}

.stat-label {
    font-size: 0.8rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* ------------------------------------------------------------
   13. Conversation Detail
   ------------------------------------------------------------ */
.message-list {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.message-item {
    display: flex;
    gap: 0.75rem;
    padding: 0.875rem 1rem;
    background: var(--bg-glass);
    border: 1px solid var(--border);
    border-radius: 12px;
    transition: background var(--transition);
}

.message-item:hover {
    background: rgba(255, 255, 255, 0.06);
}

.message-role {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.25rem 0.625rem;
    border-radius: 6px;
    font-size: 0.7rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.3px;
    flex-shrink: 0;
    height: fit-content;
}

.message-role.user {
    background: rgba(34, 211, 238, 0.15);
    color: var(--accent);
}

.message-role.assistant {
    background: rgba(99, 102, 241, 0.15);
    color: var(--primary-light);
}

.message-role.system {
    background: rgba(245, 158, 11, 0.15);
    color: var(--warning);
}

.message-text {
    flex: 1;
    font-size: 0.9rem;
    line-height: 1.6;
    color: var(--text);
    word-break: break-word;
}

/* ------------------------------------------------------------
   14. Utility Classes
   ------------------------------------------------------------ */
.text-muted {
    color: var(--text-muted);
}

.text-success {
    color: var(--success);
}

.text-error {
    color: var(--error);
}

.text-warning {
    color: var(--warning);
}

.mt-1 {
    margin-top: 0.5rem;
}

.mb-1 {
    margin-bottom: 0.5rem;
}

.mt-2 {
    margin-top: 1rem;
}

.mb-2 {
    margin-bottom: 1rem;
}

.hidden {
    display: none;
}

/* ------------------------------------------------------------
   15. Scrollbar Styling
   ------------------------------------------------------------ */
::-webkit-scrollbar {
    width: 6px;
}

::-webkit-scrollbar-track {
    background: transparent;
}

::-webkit-scrollbar-thumb {
    background: var(--border);
    border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
    background: rgba(255, 255, 255, 0.2);
}

/* ------------------------------------------------------------
   16. Empty State
   ------------------------------------------------------------ */
.empty-state {
    text-align: center;
    padding: 3rem 1.5rem;
    color: var(--text-muted);
}

.empty-state .empty-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
    opacity: 0.5;
}

.empty-state p {
    font-size: 0.9rem;
}

/* ------------------------------------------------------------
   17. Loading Spinner
   ------------------------------------------------------------ */
.spinner {
    width: 24px;
    height: 24px;
    border: 3px solid var(--border);
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: spin 0.6s linear infinite;
}

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

.loading-overlay {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 3rem;
}