/* --- Variables --- */
:root {
    --bg: #0f1117;
    --bg-card: #1a1d27;
    --bg-input: #252830;
    --text: #e4e6eb;
    --text-muted: #8b8fa3;
    --primary: #6c5ce7;
    --primary-hover: #7c6ef7;
    --danger: #e74c3c;
    --danger-hover: #c0392b;
    --success: #2ecc71;
    --border: #2d3040;
    --radius: 8px;
    --shadow: 0 4px 24px rgba(0,0,0,0.3);
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--bg);
    color: var(--text);
    min-height: 100vh;
    line-height: 1.5;
}

/* --- Layout --- */
.page-center {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    padding: 1rem;
}

.card {
    background: var(--bg-card);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 2rem;
    width: 100%;
    max-width: 400px;
}

.card h1 {
    text-align: center;
    margin-bottom: 1.5rem;
    font-size: 1.5rem;
    font-weight: 600;
}

/* --- Topbar --- */
.topbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.75rem 1.5rem;
    background: var(--bg-card);
    border-bottom: 1px solid var(--border);
}

.topbar h1 {
    font-size: 1.1rem;
    font-weight: 600;
}

/* --- Forms --- */
.form-group {
    margin-bottom: 1rem;
}

.form-group label {
    display: block;
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-bottom: 0.3rem;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 0.6rem 0.8rem;
    background: var(--bg-input);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    color: var(--text);
    font-size: 0.95rem;
    outline: none;
    transition: border-color 0.2s;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    border-color: var(--primary);
}

.form-group textarea {
    resize: vertical;
    min-height: 80px;
}

/* --- Buttons --- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.4rem;
    padding: 0.6rem 1.2rem;
    border: none;
    border-radius: var(--radius);
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    transition: background 0.2s, opacity 0.2s;
}

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

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

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

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

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

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

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

.btn-sm {
    padding: 0.35rem 0.7rem;
    font-size: 0.8rem;
}

.btn-block {
    width: 100%;
}

/* --- Alert --- */
.alert {
    padding: 0.6rem 0.8rem;
    border-radius: var(--radius);
    font-size: 0.85rem;
    margin-bottom: 1rem;
    display: none;
}

.alert-error {
    background: rgba(231,76,60,0.15);
    color: #e74c3c;
    border: 1px solid rgba(231,76,60,0.3);
}

.alert-success {
    background: rgba(46,204,113,0.15);
    color: #2ecc71;
    border: 1px solid rgba(46,204,113,0.3);
}

/* --- Table --- */
.table-wrap {
    overflow-x: auto;
}

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

th, td {
    padding: 0.6rem 0.8rem;
    text-align: left;
    border-bottom: 1px solid var(--border);
    font-size: 0.9rem;
}

th {
    color: var(--text-muted);
    font-weight: 500;
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* --- Tabs --- */
.tabs {
    display: flex;
    border-bottom: 1px solid var(--border);
    margin-bottom: 1.5rem;
}

.tab {
    padding: 0.7rem 1.2rem;
    cursor: pointer;
    color: var(--text-muted);
    border-bottom: 2px solid transparent;
    font-size: 0.9rem;
    transition: color 0.2s, border-color 0.2s;
}

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

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

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
}

/* --- Modal --- */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.6);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 100;
    padding: 1rem;
}

.modal-overlay.active {
    display: flex;
}

.modal {
    background: var(--bg-card);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 1.5rem;
    width: 100%;
    max-width: 500px;
    max-height: 90vh;
    overflow-y: auto;
}

.modal h2 {
    margin-bottom: 1rem;
    font-size: 1.2rem;
}

.modal-actions {
    display: flex;
    gap: 0.5rem;
    justify-content: flex-end;
    margin-top: 1rem;
}

/* --- Conversation page --- */
.conversation-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: calc(100vh - 52px);
    padding: 2rem;
    gap: 1.5rem;
}

.mic-button {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    border: 3px solid var(--primary);
    background: transparent;
    color: var(--primary);
    font-size: 2.5rem;
    cursor: pointer;
    transition: all 0.3s;
    display: flex;
    align-items: center;
    justify-content: center;
}

.mic-button:hover {
    background: rgba(108,92,231,0.1);
}

.mic-button.active {
    background: var(--primary);
    color: #fff;
    animation: pulse 2s ease-in-out infinite;
}

.mic-button.speaking {
    border-color: var(--success);
    background: var(--success);
    color: #fff;
    animation: pulse 1s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { transform: scale(1); box-shadow: 0 0 0 0 rgba(108,92,231,0.4); }
    50% { transform: scale(1.05); box-shadow: 0 0 0 20px rgba(108,92,231,0); }
}

.status-text {
    font-size: 0.95rem;
    color: var(--text-muted);
}

.cost-text {
    font-size: 0.8rem;
    color: var(--text-muted);
    font-family: monospace;
}

.conversation-actions {
    display: flex;
    gap: 0.8rem;
}

/* --- Admin content area --- */
.admin-content {
    max-width: 900px;
    margin: 1.5rem auto;
    padding: 0 1.5rem;
}

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
}

/* --- Responsive --- */
@media (max-width: 600px) {
    .card { padding: 1.5rem; }
    .admin-content { padding: 0 1rem; }
    th, td { padding: 0.4rem 0.5rem; font-size: 0.8rem; }
}