:root {
    --bg: #0f1117;
    --surface: #181b23;
    --surface-raised: #232734;
    --border: #2e3342;
    --text: #e8eaf0;
    --text-secondary: #9aa1b4;
    --accent: #6366f1;
    --accent-hover: #818cf8;
    --success: #34d399;
    --warning: #fbbf24;
    --danger: #f43f5e;
    --danger-hover: #fb7185;
    --radius-sm: 8px;
    --radius-lg: 12px;
    --space-1: 4px;
    --space-2: 8px;
    --space-3: 12px;
    --space-4: 16px;
    --space-6: 24px;
}

* {
    box-sizing: border-box;
}

html, body {
    height: 100%;
}

body {
    margin: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    background: var(--bg);
    color: var(--text);
    font-size: 16px;
    line-height: 1.5;
    height: 100dvh;
    overflow: hidden;
}

button, input, textarea {
    font-family: inherit;
    color: inherit;
}

button {
    cursor: pointer;
}

:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 2px;
}

@media (prefers-reduced-motion: reduce) {
    * {
        transition: none !important;
        animation: none !important;
    }
}

/* App shell */
.app {
    display: flex;
    flex-direction: column;
    height: 100dvh;
}

.app-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-3) var(--space-4);
    border-bottom: 1px solid var(--border);
    background: var(--surface);
}

.app-header h1 {
    font-size: 18px;
    margin: 0;
}

.header-right {
    display: flex;
    align-items: center;
    gap: var(--space-3);
}

.header-link {
    font-size: 13px;
    color: var(--text-secondary);
    text-decoration: none;
}

.header-link:hover {
    color: var(--text);
    text-decoration: underline;
}

.status-pill {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-1) var(--space-3);
    border-radius: 999px;
    background: var(--surface-raised);
    border: 1px solid var(--border);
    font-size: 14px;
}

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

.status-pill[data-state="connecting"] .status-dot { background: var(--warning); }
.status-pill[data-state="connected"] .status-dot { background: var(--success); }
.status-pill[data-state="failed"] .status-dot,
.status-pill[data-state="disconnected"] .status-dot { background: var(--danger); }

.app-main {
    flex: 1;
    display: flex;
    min-height: 0;
}

/* Video stage */
.video-stage {
    position: relative;
    flex: 1;
    background: #000;
    display: flex;
    align-items: center;
    justify-content: center;
    min-width: 0;
}

.video-stage video {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

#remoteVideo {
    background: #000;
}

.stage-placeholder {
    position: absolute;
    inset: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    color: var(--text-secondary);
    text-align: center;
    padding: var(--space-4);
}

.stage-placeholder[hidden] {
    display: none;
}

.stage-placeholder svg {
    width: 48px;
    height: 48px;
    opacity: 0.6;
}

.pip {
    position: absolute;
    bottom: var(--space-4);
    right: var(--space-4);
    width: 200px;
    aspect-ratio: 4 / 3;
    border-radius: var(--radius-lg);
    overflow: hidden;
    border: 1px solid var(--border);
    background: var(--surface);
    z-index: 10;
}

.pip video {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transform: scaleX(-1);
}

.pip-label {
    position: absolute;
    left: var(--space-2);
    bottom: var(--space-2);
    font-size: 12px;
    background: rgba(0, 0, 0, 0.6);
    padding: 2px 6px;
    border-radius: var(--radius-sm);
}

/* Failure panel */
.failure-panel {
    position: absolute;
    inset: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: var(--space-3);
    text-align: center;
    padding: var(--space-6);
    background: rgba(15, 17, 23, 0.92);
    z-index: 50;
}

.failure-panel[hidden] {
    display: none;
}

.failure-panel h2 {
    margin: 0;
    font-size: 18px;
    color: var(--danger);
}

.failure-panel p {
    margin: 0;
    max-width: 420px;
    color: var(--text-secondary);
    font-size: 14px;
}

.failure-panel .actions {
    display: flex;
    gap: var(--space-2);
    margin-top: var(--space-2);
}

/* Chat sidebar */
.chat-sidebar {
    width: 340px;
    flex-shrink: 0;
    display: flex;
    flex-direction: column;
    background: var(--surface);
    border-left: 1px solid var(--border);
}

.chat-sidebar[hidden] {
    display: none;
}

.chat-header {
    padding: var(--space-3) var(--space-4);
    border-bottom: 1px solid var(--border);
    font-weight: 600;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.chat-messages {
    flex: 1;
    overflow-y: auto;
    padding: var(--space-4);
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
    list-style: none;
    margin: 0;
}

.chat-empty {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    color: var(--text-secondary);
    text-align: center;
    height: 100%;
}

.chat-empty svg {
    width: 32px;
    height: 32px;
    opacity: 0.6;
}

.bubble {
    max-width: 80%;
    padding: var(--space-2) var(--space-3);
    border-radius: var(--radius-lg);
    font-size: 14px;
    word-break: break-word;
}

.bubble .bubble-time {
    display: block;
    font-size: 11px;
    color: var(--text-secondary);
    margin-top: 2px;
}

.bubble.own {
    align-self: flex-end;
    background: var(--accent);
    color: #fff;
}

.bubble.own .bubble-time {
    color: rgba(255, 255, 255, 0.75);
}

.bubble.remote {
    align-self: flex-start;
    background: var(--surface-raised);
    border: 1px solid var(--border);
}

.chat-disconnect-banner {
    padding: var(--space-2) var(--space-4);
    background: rgba(244, 63, 94, 0.12);
    color: var(--danger);
    font-size: 13px;
    border-top: 1px solid var(--border);
}

.chat-disconnect-banner[hidden] {
    display: none;
}

.chat-input-row {
    display: flex;
    gap: var(--space-2);
    padding: var(--space-3) var(--space-4);
    border-top: 1px solid var(--border);
}

.chat-input-row input {
    flex: 1;
    background: var(--surface-raised);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: var(--space-2) var(--space-3);
}

.chat-input-row input:disabled {
    opacity: 0.5;
}

.icon-btn {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border);
    background: var(--surface-raised);
    display: flex;
    align-items: center;
    justify-content: center;
}

.icon-btn svg {
    width: 18px;
    height: 18px;
}

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

/* Control bar */
.control-bar {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-3);
    padding: var(--space-4);
    background: var(--surface);
    border-top: 1px solid var(--border);
}

.control-btn {
    width: 52px;
    height: 52px;
    border-radius: 50%;
    border: 1px solid var(--border);
    background: var(--surface-raised);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 150ms ease-out, transform 150ms ease-out;
}

.control-btn svg {
    width: 22px;
    height: 22px;
    stroke: var(--text);
}

.control-btn:hover {
    background: #2b3040;
}

.control-btn[aria-pressed="true"] {
    background: var(--danger);
    border-color: var(--danger);
}

.control-btn[aria-pressed="true"] svg {
    stroke: #fff;
}

.control-btn.hangup {
    background: var(--danger);
    border-color: var(--danger);
}

.control-btn.hangup svg {
    stroke: #fff;
}

.control-btn.hangup:hover {
    background: var(--danger-hover);
}

.control-btn:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

.unread-badge {
    position: absolute;
    top: -2px;
    right: -2px;
    min-width: 16px;
    height: 16px;
    padding: 0 4px;
    border-radius: 999px;
    background: var(--danger);
    color: #fff;
    font-size: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.unread-badge[hidden] {
    display: none;
}

.control-btn-wrap {
    position: relative;
}

/* Buttons */
.btn {
    padding: var(--space-2) var(--space-4);
    border-radius: var(--radius-sm);
    border: 1px solid var(--border);
    background: var(--surface-raised);
    font-size: 14px;
    font-weight: 500;
    transition: background 150ms ease-out;
}

.btn:hover {
    background: #2b3040;
}

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

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

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

.btn-spinner {
    display: inline-block;
    width: 14px;
    height: 14px;
    border: 2px solid rgba(255, 255, 255, 0.4);
    border-top-color: #fff;
    border-radius: 50%;
    animation: spin 700ms linear infinite;
    margin-right: var(--space-2);
    vertical-align: middle;
}

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

/* Modal */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.6);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    padding: var(--space-4);
}

.modal-overlay[hidden] {
    display: none;
}

.modal {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    width: 100%;
    max-width: 520px;
    max-height: 90vh;
    overflow-y: auto;
    padding: var(--space-6);
}

.modal h2 {
    margin-top: 0;
    font-size: 18px;
}

.step-indicator {
    display: flex;
    gap: var(--space-2);
    margin-bottom: var(--space-4);
    font-size: 12px;
    color: var(--text-secondary);
}

.role-cards {
    display: flex;
    gap: var(--space-3);
}

.role-card {
    flex: 1;
    padding: var(--space-4);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    background: var(--surface-raised);
    text-align: left;
}

.role-card:hover {
    border-color: var(--accent);
}

.role-card h3 {
    margin: 0 0 var(--space-1);
    font-size: 15px;
}

.role-card p {
    margin: 0;
    font-size: 13px;
    color: var(--text-secondary);
}

.field {
    margin-bottom: var(--space-4);
}

.field label {
    display: block;
    font-size: 13px;
    color: var(--text-secondary);
    margin-bottom: var(--space-1);
}

.field textarea, .field input[type="text"] {
    width: 100%;
    background: var(--surface-raised);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: var(--space-2);
    font-family: monospace;
    font-size: 12px;
    resize: vertical;
}

.field-error {
    color: var(--danger);
    font-size: 12px;
    margin-top: var(--space-1);
}

.field-error[hidden] {
    display: none;
}

.copy-row {
    display: flex;
    gap: var(--space-2);
    align-items: center;
    margin-top: var(--space-2);
}

.hint {
    font-size: 12px;
    color: var(--text-secondary);
    margin: var(--space-1) 0 var(--space-3);
}

.waiting-row {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    font-size: 13px;
    color: var(--text-secondary);
}

.waiting-row[hidden] {
    display: none;
}

.waiting-row .btn-spinner {
    margin-right: 0;
    border-color: var(--border);
    border-top-color: var(--accent);
}

.privacy-note {
    margin: var(--space-4) 0 0;
    font-size: 12px;
    line-height: 1.6;
    color: var(--text-secondary);
}

.privacy-note a {
    color: var(--accent-hover);
}

details.advanced {
    margin-top: var(--space-4);
    border-top: 1px solid var(--border);
    padding-top: var(--space-3);
}

details.advanced summary {
    cursor: pointer;
    font-size: 13px;
    color: var(--text-secondary);
}

.modal-actions {
    display: flex;
    justify-content: flex-end;
    gap: var(--space-2);
    margin-top: var(--space-4);
}

.modal-minimize {
    position: absolute;
    top: var(--space-3);
    right: var(--space-3);
}

/* Toasts */
.toast-container {
    position: fixed;
    top: var(--space-4);
    right: var(--space-4);
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
    z-index: 1100;
}

.toast {
    background: var(--surface-raised);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: var(--space-3) var(--space-4);
    font-size: 14px;
    max-width: 320px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}

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

/* Standalone document pages */
body.doc {
    height: auto;
    overflow: auto;
}

.doc-page {
    max-width: 680px;
    margin: 0 auto;
    padding: var(--space-6) var(--space-4) 64px;
}

.doc-page h1 {
    font-size: 24px;
    margin: 0 0 var(--space-1);
}

.doc-page h2 {
    font-size: 16px;
    margin: var(--space-6) 0 var(--space-2);
}

.doc-page p, .doc-page li {
    font-size: 14px;
    color: var(--text-secondary);
}

.doc-page li {
    margin-bottom: var(--space-2);
}

.doc-page strong {
    color: var(--text);
}

.doc-page a {
    color: var(--accent-hover);
}

.doc-page code {
    font-size: 13px;
    background: var(--surface-raised);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 1px 5px;
}

.doc-updated {
    font-size: 12px !important;
    margin-top: 0;
}

.doc-back {
    margin-bottom: var(--space-6);
}

/* Responsive */
@media (max-width: 768px) {
    .app-main {
        position: relative;
    }

    .chat-sidebar {
        position: absolute;
        inset: 0;
        width: 100%;
        z-index: 100;
    }

    .pip {
        width: 110px;
        bottom: var(--space-2);
        right: var(--space-2);
    }

    .control-bar {
        gap: var(--space-2);
    }
}