/* Fugue Design System — Commercial Grade */

/* Tokens */
:root {
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', 'SF Mono', monospace;

    /* Neutral palette */
    --gray-50: #fafafa;
    --gray-100: #f4f4f5;
    --gray-200: #e4e4e7;
    --gray-300: #d4d4d8;
    --gray-400: #a1a1aa;
    --gray-500: #71717a;
    --gray-600: #52525b;
    --gray-700: #3f3f46;
    --gray-800: #27272a;
    --gray-900: #18181b;
    --gray-950: #09090b;

    /* Brand */
    --brand-50: #eff6ff;
    --brand-100: #dbeafe;
    --brand-200: #bfdbfe;
    --brand-400: #60a5fa;
    --brand-500: #3b82f6;
    --brand-600: #2563eb;
    --brand-700: #1d4ed8;

    /* Accent */
    --violet-500: #8b5cf6;
    --violet-600: #7c3aed;
    --emerald-500: #10b981;
    --emerald-600: #059669;
    --amber-500: #f59e0b;
    --rose-500: #f43f5e;
    --rose-600: #e11d48;

    /* Semantic */
    --bg: var(--gray-950);
    --bg-elevated: var(--gray-900);
    --bg-surface: var(--gray-800);
    --bg-hover: var(--gray-700);
    --border: var(--gray-800);
    --border-subtle: rgba(255,255,255,0.06);
    --text: var(--gray-100);
    --text-secondary: var(--gray-400);
    --text-muted: var(--gray-500);
    --accent: var(--brand-500);
    --accent-hover: var(--brand-600);

    /* Spacing */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;
    --space-3xl: 4rem;

    /* Radius */
    --radius-sm: 6px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    --radius-full: 9999px;
}

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

body {
    font-family: var(--font-sans);
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

a { color: var(--accent); text-decoration: none; }
a:hover { color: var(--brand-400); }

/* ─── Navbar ─── */
.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 var(--space-xl);
    height: 56px;
    background: rgba(9,9,11,0.8);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-subtle);
    position: sticky;
    top: 0;
    z-index: 100;
}

.logo {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text);
    letter-spacing: -0.02em;
}

.logo span { color: var(--brand-400); }

.nav-links {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
}

.nav-links a {
    color: var(--text-secondary);
    padding: 6px 12px;
    border-radius: var(--radius-sm);
    font-size: 0.875rem;
    font-weight: 500;
    transition: all 0.15s;
}

.nav-links a:hover {
    color: var(--text);
    background: var(--bg-surface);
}

.nav-user {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    margin-left: var(--space-md);
    padding-left: var(--space-md);
    border-left: 1px solid var(--border-subtle);
}

.nav-avatar {
    width: 28px;
    height: 28px;
    border-radius: var(--radius-full);
    object-fit: cover;
}

.nav-user-name {
    font-size: 0.8125rem;
    color: var(--text-secondary);
}

/* ─── Container ─── */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--space-xl);
}

.container-narrow {
    max-width: 640px;
    margin: 0 auto;
    padding: var(--space-xl);
}

/* ─── Page Header ─── */
.page-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--space-xl);
}

.page-header h1 {
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: -0.02em;
}

.page-subtitle {
    color: var(--text-secondary);
    font-size: 0.875rem;
    margin-top: 2px;
}

/* ─── Buttons ─── */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    padding: 8px 16px;
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-size: 0.875rem;
    font-weight: 500;
    font-family: var(--font-sans);
    transition: all 0.15s;
    white-space: nowrap;
    text-decoration: none;
    line-height: 1.4;
}

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

.btn-secondary {
    background: var(--bg-surface);
    color: var(--text);
    border: 1px solid var(--border);
}
.btn-secondary:hover {
    background: var(--bg-hover);
    border-color: var(--gray-600);
    color: var(--text);
}

.btn-ghost {
    background: transparent;
    color: var(--text-secondary);
}
.btn-ghost:hover {
    background: var(--bg-surface);
    color: var(--text);
}

.btn-danger {
    background: var(--rose-600);
    color: white;
}
.btn-danger:hover {
    background: var(--rose-500);
}

.btn-lg {
    padding: 12px 24px;
    font-size: 1rem;
    border-radius: var(--radius-md);
}

.btn-sm {
    padding: 4px 10px;
    font-size: 0.75rem;
}

.btn-icon {
    width: 32px;
    height: 32px;
    padding: 0;
    border-radius: var(--radius-sm);
}

/* ─── Badge ─── */
.badge {
    display: inline-flex;
    align-items: center;
    padding: 2px 8px;
    background: var(--bg-surface);
    color: var(--text-secondary);
    border-radius: var(--radius-full);
    font-size: 0.6875rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

.badge-brand {
    background: rgba(59,130,246,0.15);
    color: var(--brand-400);
}

.badge-global {
    background: rgba(139,92,246,0.15);
    color: var(--violet-500);
}

/* ─── Cards ─── */
.card {
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
    transition: border-color 0.15s;
}

.card:hover {
    border-color: var(--gray-700);
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: var(--space-sm);
}

.card h2 {
    font-size: 1rem;
    font-weight: 600;
    letter-spacing: -0.01em;
}

.card-description {
    color: var(--text-secondary);
    font-size: 0.875rem;
    line-height: 1.5;
    margin-bottom: var(--space-md);
}

.card-meta {
    display: flex;
    gap: var(--space-md);
    color: var(--text-muted);
    font-size: 0.75rem;
}

.card-actions {
    display: flex;
    gap: var(--space-sm);
    margin-top: var(--space-md);
    padding-top: var(--space-md);
    border-top: 1px solid var(--border-subtle);
}

/* ─── Template Grid ─── */
.template-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(360px, 1fr));
    gap: var(--space-md);
}

.template-card { position: relative; }

.template-card .delete-btn {
    position: absolute;
    top: var(--space-sm);
    right: var(--space-sm);
    opacity: 0;
    transition: opacity 0.15s;
}

.template-card:hover .delete-btn { opacity: 1; }

/* ─── Chat List ─── */
.chat-list {
    display: grid;
    gap: var(--space-sm);
}

.chat-card {
    display: flex;
    align-items: center;
    padding: var(--space-md) var(--space-lg);
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    transition: all 0.15s;
    text-decoration: none;
    color: var(--text);
}

.chat-card:hover {
    border-color: var(--gray-700);
    background: var(--bg-surface);
    color: var(--text);
}

.chat-card-content { flex: 1; }

.chat-card h3 {
    font-size: 0.9375rem;
    font-weight: 600;
}

.chat-card-meta {
    display: flex;
    gap: var(--space-md);
    color: var(--text-muted);
    font-size: 0.75rem;
    margin-top: 2px;
}

/* ─── Forms ─── */
.form { max-width: 640px; }

.form-group {
    margin-bottom: var(--space-lg);
}

.form-group label {
    display: block;
    margin-bottom: var(--space-xs);
    color: var(--text-secondary);
    font-size: 0.8125rem;
    font-weight: 500;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 10px 12px;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text);
    font-size: 0.875rem;
    font-family: var(--font-sans);
    transition: border-color 0.15s;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(59,130,246,0.1);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
    color: var(--gray-600);
}

.form-help {
    color: var(--text-muted);
    font-size: 0.75rem;
    margin-top: var(--space-xs);
}

.form-section {
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
    margin-bottom: var(--space-lg);
}

.form-section h2 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: var(--space-md);
}

.form-actions {
    display: flex;
    gap: var(--space-sm);
    margin-top: var(--space-xl);
}

/* ─── Alert ─── */
.alert {
    padding: var(--space-md);
    border-radius: var(--radius-md);
    margin-bottom: var(--space-lg);
    font-size: 0.875rem;
}

.alert-success {
    background: rgba(16,185,129,0.1);
    color: var(--emerald-500);
    border: 1px solid rgba(16,185,129,0.2);
}

/* ─── Chat View ─── */
.chat-container {
    display: grid;
    grid-template-columns: 260px 1fr 240px;
    gap: var(--space-md);
    height: calc(100vh - 72px);
}

.chat-sidebar {
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
    display: flex;
    flex-direction: column;
    gap: var(--space-lg);
    overflow-y: auto;
}

.chat-info h1 {
    font-size: 1.125rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    margin-bottom: var(--space-xs);
}

.chat-meta {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-xs);
}

.participants-section h2,
.tools-section h2 {
    font-size: 0.6875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--text-muted);
    margin-bottom: var(--space-sm);
}

.participants-list { list-style: none; }

.participant-item {
    padding: 8px 10px;
    margin-bottom: 4px;
    background: var(--bg-surface);
    border-radius: var(--radius-sm);
    border-left: 2px solid var(--accent);
}

.participant-name {
    display: block;
    font-weight: 500;
    font-size: 0.8125rem;
}

.participant-model-label {
    display: block;
    font-size: 0.6875rem;
    color: var(--text-muted);
    font-family: var(--font-mono);
}

.tools-list {
    display: flex;
    flex-wrap: wrap;
    gap: 4px;
}

.tools-badge {
    padding: 2px 8px;
    background: var(--bg-surface);
    color: var(--text-muted);
    border-radius: var(--radius-full);
    font-size: 0.6875rem;
}

.chat-actions {
    margin-top: auto;
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.auto-status {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-sm);
    background: rgba(59,130,246,0.1);
    border: 1px solid rgba(59,130,246,0.2);
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    color: var(--brand-400);
}

/* ─── Chat Main ─── */
.chat-main {
    display: flex;
    flex-direction: column;
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.messages-container {
    flex: 1;
    overflow-y: auto;
    padding: var(--space-lg);
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

.message {
    padding: var(--space-md);
    border-radius: var(--radius-md);
    max-width: 85%;
}

.user-message {
    background: rgba(59,130,246,0.1);
    border: 1px solid rgba(59,130,246,0.15);
    align-self: flex-end;
}

.assistant-message {
    background: var(--bg-surface);
    border: 1px solid var(--border-subtle);
    align-self: flex-start;
}

.message-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 6px;
}

.message-sender {
    font-weight: 600;
    font-size: 0.8125rem;
    color: var(--brand-400);
}

.user-message .message-sender {
    color: var(--text-secondary);
}

.message-time {
    font-size: 0.6875rem;
    color: var(--text-muted);
}

.message-content {
    word-wrap: break-word;
    font-size: 0.875rem;
    line-height: 1.6;
}

/* Streaming content (not yet parsed as markdown) */
#streaming-content {
    white-space: pre-wrap;
}

/* Markdown body styling */
.message-content.markdown-body p {
    margin: 0.25em 0;
}

.message-content.markdown-body p:first-child {
    margin-top: 0;
}

.message-content.markdown-body p:last-child {
    margin-bottom: 0;
}

.message-content.markdown-body img {
    max-width: 100%;
    max-height: 400px;
    border-radius: var(--radius);
    margin: 0.5em 0;
}

.message-content.markdown-body pre {
    background: var(--bg-secondary);
    padding: var(--space-sm);
    border-radius: var(--radius);
    overflow-x: auto;
    margin: 0.5em 0;
}

.message-content.markdown-body code {
    background: var(--bg-secondary);
    padding: 0.1em 0.3em;
    border-radius: 3px;
    font-size: 0.85em;
}

.message-content.markdown-body pre code {
    background: none;
    padding: 0;
}

.message-content.markdown-body blockquote {
    border-left: 3px solid var(--border);
    margin: 0.5em 0;
    padding-left: var(--space-sm);
    color: var(--text-muted);
}

.message-content.markdown-body ul,
.message-content.markdown-body ol {
    margin: 0.25em 0;
    padding-left: 1.5em;
}

.message-content.markdown-body h1,
.message-content.markdown-body h2,
.message-content.markdown-body h3 {
    margin: 0.5em 0 0.25em;
    font-size: 1em;
    font-weight: 600;
}

.typing-indicator {
    font-size: 0.6875rem;
    color: var(--text-muted);
    animation: pulse 1.5s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.4; }
}

/* ─── Message Form ─── */
.message-form {
    display: flex;
    gap: var(--space-sm);
    padding: var(--space-md);
    border-top: 1px solid var(--border);
    background: var(--bg);
}

.message-form textarea {
    flex: 1;
    padding: 10px 12px;
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text);
    font-size: 0.875rem;
    font-family: var(--font-sans);
    resize: none;
    transition: border-color 0.15s;
}

.message-form textarea:focus {
    outline: none;
    border-color: var(--accent);
}

/* ─── Image Gallery ─── */
.image-gallery {
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
    overflow-y: auto;
}

.image-gallery h2 {
    font-size: 0.6875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--text-muted);
    margin-bottom: var(--space-md);
}

.gallery-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-sm);
}

.gallery-item {
    aspect-ratio: 1;
    overflow: hidden;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: transform 0.2s;
}

.gallery-item:hover { transform: scale(1.02); }
.gallery-item img { width: 100%; height: 100%; object-fit: cover; }

.gallery-placeholder {
    text-align: center;
    padding: var(--space-xl);
    color: var(--text-muted);
    font-size: 0.8125rem;
}

/* ─── Modal ─── */
.modal {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.6);
    backdrop-filter: blur(4px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
}

.modal-content {
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    padding: var(--space-xl);
    border-radius: var(--radius-xl);
    max-width: 480px;
    width: 90%;
    box-shadow: 0 24px 48px rgba(0,0,0,0.4);
}

.modal-content h2 {
    font-size: 1.125rem;
    font-weight: 700;
    margin-bottom: var(--space-lg);
}

/* ─── Image Modal ─── */
.image-modal {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.92);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 2000;
}

.image-modal-content {
    position: relative;
    max-width: 90vw;
    max-height: 90vh;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.image-modal-content img {
    max-width: 100%;
    max-height: 80vh;
    object-fit: contain;
    border-radius: var(--radius-lg);
}

.image-modal-caption {
    margin-top: var(--space-md);
    color: var(--text-secondary);
    text-align: center;
    font-size: 0.875rem;
    max-width: 600px;
}

.image-modal-close {
    position: absolute;
    top: -40px;
    right: 0;
    background: none;
    border: none;
    color: white;
    font-size: 1.5rem;
    cursor: pointer;
}

.image-modal-prev,
.image-modal-next {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background: rgba(255,255,255,0.08);
    border: none;
    color: white;
    font-size: 2rem;
    padding: var(--space-md);
    cursor: pointer;
    border-radius: var(--radius-sm);
    transition: background 0.15s;
}

.image-modal-prev:hover,
.image-modal-next:hover { background: rgba(255,255,255,0.15); }
.image-modal-prev { left: -60px; }
.image-modal-next { right: -60px; }

/* ─── Notification Toast ─── */
.notification-toast {
    position: fixed;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%) translateY(80px);
    background: var(--bg-elevated);
    color: var(--text);
    padding: 10px 20px;
    border-radius: var(--radius-md);
    border: 1px solid var(--border);
    font-size: 0.8125rem;
    z-index: 10000;
    opacity: 0;
    transition: all 0.25s ease;
    box-shadow: 0 8px 24px rgba(0,0,0,0.3);
}

.notification-toast.show {
    transform: translateX(-50%) translateY(0);
    opacity: 1;
}

/* ─── Model Autocomplete ─── */
.model-input-container { position: relative; }

.model-suggestions {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    max-height: 240px;
    overflow-y: auto;
    z-index: 1000;
    margin-top: 2px;
}

.model-suggestions:empty { display: none; }

.model-suggestion {
    padding: 8px 12px;
    cursor: pointer;
    font-family: var(--font-mono);
    font-size: 0.8125rem;
    border-bottom: 1px solid var(--border-subtle);
}

.model-suggestion:last-child { border-bottom: none; }
.model-suggestion:hover { background: var(--bg-surface); }

.model-suggestion-empty {
    padding: 8px 12px;
    color: var(--text-muted);
    font-style: italic;
    font-size: 0.8125rem;
}

/* ─── Participant Form ─── */
.participant-form {
    padding: var(--space-md);
    margin-bottom: var(--space-sm);
    background: var(--bg-surface);
    border-radius: var(--radius-md);
    border: 1px solid var(--border-subtle);
}

.participant-form .form-group { margin-bottom: var(--space-md); }

/* ─── Template Details ─── */
.template-details {
    display: flex;
    flex-direction: column;
    gap: var(--space-xl);
}

.detail-section h2 {
    font-size: 0.6875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--text-muted);
    margin-bottom: var(--space-md);
}

.settings-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: var(--space-md);
}

.setting-item {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.setting-label {
    font-size: 0.6875rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

.participants-grid { display: grid; gap: var(--space-sm); }

.participant-card {
    padding: var(--space-md);
    background: var(--bg-surface);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md);
}

.participant-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--space-xs);
}

.participant-card .participant-name {
    font-weight: 600;
    color: var(--brand-400);
    font-size: 0.875rem;
}

.participant-model {
    font-size: 0.75rem;
    color: var(--text-muted);
    font-family: var(--font-mono);
}

.participant-prompt {
    font-size: 0.8125rem;
    margin-top: var(--space-sm);
}

.participant-prompt pre {
    background: var(--bg);
    padding: var(--space-sm);
    border-radius: var(--radius-sm);
    margin-top: 4px;
    white-space: pre-wrap;
    font-size: 0.75rem;
    color: var(--text-secondary);
}

/* ─── Tools Checkbox List ─── */
.tools-checkbox-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.tool-checkbox {
    padding: var(--space-sm) var(--space-md);
    background: var(--bg-surface);
    border-radius: var(--radius-sm);
}

.tool-checkbox label {
    display: flex;
    align-items: flex-start;
    gap: var(--space-sm);
    cursor: pointer;
    margin: 0;
    font-size: 0.875rem;
}

.tool-checkbox input[type="checkbox"] {
    width: auto;
    margin-top: 3px;
    cursor: pointer;
}

.tool-checkbox strong { color: var(--brand-400); }

/* ─── Empty State ─── */
.empty-state {
    text-align: center;
    padding: var(--space-3xl) var(--space-xl);
    background: var(--bg-elevated);
    border: 1px dashed var(--border);
    border-radius: var(--radius-lg);
}

.empty-state p {
    margin-bottom: var(--space-md);
    color: var(--text-secondary);
}

/* ─── Delete Card Button ─── */
.delete-card-btn {
    width: 28px;
    height: 28px;
    border: none;
    background: var(--bg-surface);
    color: var(--text-muted);
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-size: 1rem;
    line-height: 1;
    opacity: 0;
    transition: all 0.15s;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* ─── Persona Grid ─── */
.persona-category {
    margin-bottom: var(--space-2xl);
}

.persona-category h2 {
    font-size: 1rem;
    font-weight: 600;
    text-transform: capitalize;
    margin-bottom: var(--space-md);
    padding-bottom: var(--space-sm);
    border-bottom: 1px solid var(--border-subtle);
}

.persona-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: var(--space-md);
}

.persona-card {
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
    transition: border-color 0.15s;
}

.persona-card:hover { border-color: var(--gray-700); }

.persona-emoji {
    font-size: 2rem;
    margin-bottom: var(--space-sm);
}

.persona-card h3 {
    font-size: 0.9375rem;
    font-weight: 600;
    margin-bottom: 4px;
}

.persona-card p {
    font-size: 0.8125rem;
    color: var(--text-secondary);
    line-height: 1.5;
}

.persona-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 4px;
    margin-top: var(--space-sm);
}

.persona-tag {
    padding: 1px 6px;
    background: var(--bg-surface);
    color: var(--text-muted);
    border-radius: var(--radius-full);
    font-size: 0.625rem;
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

/* ─── Landing Page ─── */
.landing {
    min-height: 100vh;
    background: var(--bg);
}

.landing-nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--space-lg) var(--space-xl);
    max-width: 1200px;
    margin: 0 auto;
}

.landing-nav .logo {
    font-size: 1.5rem;
}

.hero {
    max-width: 800px;
    margin: 0 auto;
    padding: 80px var(--space-xl) 60px;
    text-align: center;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    padding: 4px 14px;
    background: rgba(139,92,246,0.1);
    border: 1px solid rgba(139,92,246,0.2);
    border-radius: var(--radius-full);
    color: var(--violet-500);
    font-size: 0.75rem;
    font-weight: 500;
    margin-bottom: var(--space-xl);
}

.hero h1 {
    font-size: clamp(2.5rem, 5vw, 3.5rem);
    font-weight: 800;
    letter-spacing: -0.03em;
    line-height: 1.1;
    margin-bottom: var(--space-lg);
}

.hero h1 .gradient {
    background: linear-gradient(135deg, var(--brand-400), var(--violet-500));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero p {
    font-size: 1.125rem;
    color: var(--text-secondary);
    line-height: 1.6;
    max-width: 580px;
    margin: 0 auto var(--space-2xl);
}

.hero-actions {
    display: flex;
    gap: var(--space-md);
    justify-content: center;
}

/* Feature Grid */
.features {
    max-width: 1200px;
    margin: 0 auto;
    padding: 60px var(--space-xl) 80px;
}

.features-header {
    text-align: center;
    margin-bottom: var(--space-3xl);
}

.features-header h2 {
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    margin-bottom: var(--space-sm);
}

.features-header p {
    color: var(--text-secondary);
    font-size: 0.9375rem;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-md);
}

.feature-card {
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    transition: border-color 0.2s;
}

.feature-card:hover { border-color: var(--gray-700); }

.feature-icon {
    width: 40px;
    height: 40px;
    background: rgba(59,130,246,0.1);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    margin-bottom: var(--space-md);
}

.feature-card h3 {
    font-size: 0.9375rem;
    font-weight: 600;
    margin-bottom: var(--space-xs);
}

.feature-card p {
    color: var(--text-secondary);
    font-size: 0.8125rem;
    line-height: 1.5;
}

/* Social Proof */
.social-proof {
    border-top: 1px solid var(--border);
    padding: 60px var(--space-xl);
    text-align: center;
}

.social-proof p {
    color: var(--text-muted);
    font-size: 0.8125rem;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    margin-bottom: var(--space-xl);
}

.model-logos {
    display: flex;
    justify-content: center;
    gap: var(--space-2xl);
    flex-wrap: wrap;
    color: var(--text-muted);
    font-size: 0.875rem;
    font-weight: 500;
}

.landing-footer {
    border-top: 1px solid var(--border);
    padding: var(--space-xl);
    text-align: center;
    color: var(--text-muted);
    font-size: 0.75rem;
}

/* ─── Login Page ─── */
.login-container {
    min-height: calc(100vh - 56px);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-xl);
}

.login-card {
    width: 100%;
    max-width: 400px;
    text-align: center;
}

.login-card h1 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: var(--space-sm);
}

.login-card p {
    color: var(--text-secondary);
    font-size: 0.875rem;
    margin-bottom: var(--space-2xl);
}

.login-buttons {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.btn-oauth {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    width: 100%;
    padding: 12px;
    background: var(--bg-surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    color: var(--text);
    font-size: 0.9375rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.15s;
    text-decoration: none;
    font-family: var(--font-sans);
}

.btn-oauth:hover {
    background: var(--bg-hover);
    border-color: var(--gray-600);
    color: var(--text);
}

.btn-oauth svg { width: 20px; height: 20px; }

.login-footer {
    margin-top: var(--space-2xl);
    color: var(--text-muted);
    font-size: 0.75rem;
}

/* ─── Responsive ─── */
@media (max-width: 1100px) {
    .chat-container { grid-template-columns: 220px 1fr; }
    .image-gallery { display: none; }
    .features-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
    .chat-container {
        grid-template-columns: 1fr;
        height: auto;
    }
    .chat-sidebar { order: 2; }
    .chat-main { height: 70vh; }
    .image-gallery { display: none; }
    .template-grid { grid-template-columns: 1fr; }
    .features-grid { grid-template-columns: 1fr; }
    .hero h1 { font-size: 2rem; }
    .hero-actions { flex-direction: column; align-items: center; }
}

/* ─── Scrollbar ─── */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb {
    background: var(--gray-700);
    border-radius: 3px;
}
::-webkit-scrollbar-thumb:hover { background: var(--gray-600); }

/* ─── Header Actions ─── */
.header-actions {
    display: flex;
    gap: var(--space-sm);
}

.import-btn { cursor: pointer; }

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

.badge-sm {
    font-size: 0.5625rem;
    padding: 1px 5px;
}

.template-actions-bottom { margin-top: var(--space-xl); }

/* ─── Advanced Options (Progressive Disclosure) ─── */
.advanced-options {
    margin: var(--space-lg) 0;
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    background: var(--surface-raised);
}

.advanced-options summary {
    padding: var(--space-md) var(--space-lg);
    cursor: pointer;
    color: var(--text-secondary);
    font-size: 0.875rem;
    font-weight: 500;
    user-select: none;
    list-style: none;
}

.advanced-options summary::before {
    content: '▸ ';
}

.advanced-options[open] summary::before {
    content: '▾ ';
}

.advanced-options summary::-webkit-details-marker {
    display: none;
}

.advanced-options-content {
    padding: 0 var(--space-lg) var(--space-lg);
}

/* ─── Save as Reusable Scenario ─── */
.save-reuse-section {
    margin: var(--space-md) 0;
}

.checkbox-label {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    cursor: pointer;
    color: var(--text-secondary);
    font-size: 0.875rem;
}

.checkbox-label input[type="checkbox"] {
    width: 16px;
    height: 16px;
    accent-color: var(--brand-500);
}

/* ─── Participant Persona Row ─── */
.participant-persona-row {
    display: flex;
    align-items: flex-end;
    gap: var(--space-sm);
}

.participant-persona-row .display-name-group {
    flex: 1;
}

.choose-persona-btn {
    margin-bottom: var(--space-xs);
    white-space: nowrap;
    font-size: 0.8125rem;
    color: var(--brand-400);
}

.choose-persona-btn:hover {
    color: var(--brand-500);
}

/* ─── Persona Picker Modal ─── */
.modal-lg {
    max-width: 640px;
    max-height: 80vh;
    overflow-y: auto;
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--space-md);
}

.modal-header h2 {
    margin: 0;
}

.modal-close-btn {
    font-size: 1.5rem;
    line-height: 1;
    padding: 0 var(--space-xs);
}

.persona-picker-grid {
    display: flex;
    flex-direction: column;
    gap: var(--space-lg);
}

.persona-picker-category h3 {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-muted);
    margin-bottom: var(--space-sm);
}

.persona-picker-items {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    gap: var(--space-sm);
}

.persona-picker-item {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 2px;
    padding: var(--space-sm) var(--space-md);
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    cursor: pointer;
    text-align: left;
    transition: border-color 0.15s, background 0.15s;
    color: var(--text-primary);
}

.persona-picker-item:hover {
    border-color: var(--brand-500);
    background: var(--surface-raised);
}

.persona-picker-emoji {
    font-size: 1.25rem;
}

.persona-picker-name {
    font-weight: 600;
    font-size: 0.875rem;
}

.persona-picker-desc {
    font-size: 0.75rem;
    color: var(--text-muted);
    line-height: 1.3;
}

/* ─── Quick Start Launcher ─── */
.quick-start {
    text-align: center;
    padding: var(--space-2xl) 0 var(--space-xl);
}

.quick-start h1 {
    font-size: 1.75rem;
    margin-bottom: var(--space-lg);
}

.quick-start-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--space-lg);
    max-width: 640px;
    margin: 0 auto;
}

.quick-start-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-xl) var(--space-lg);
    background: var(--surface-raised);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: border-color 0.15s, transform 0.1s;
    text-decoration: none;
    color: inherit;
}

.quick-start-card:hover {
    border-color: var(--brand-500);
    transform: translateY(-2px);
}

.quick-start-icon {
    font-size: 2rem;
}

.quick-start-card h2 {
    font-size: 1.125rem;
    margin: 0;
}

.quick-start-card p {
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin: 0;
}

/* Quick Start Form */
.quick-start-form {
    max-width: 640px;
    margin: 0 auto;
    padding: var(--space-xl) 0;
}

.quick-start-form h2 {
    margin-bottom: var(--space-md);
}

.model-cards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
    gap: var(--space-sm);
}

.model-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
    padding: var(--space-md) var(--space-sm);
    background: var(--surface);
    border: 2px solid var(--border);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: border-color 0.15s, background 0.15s;
    color: var(--text-primary);
}

.model-card:hover {
    border-color: var(--brand-400);
}

.model-card.selected {
    border-color: var(--brand-500);
    background: var(--brand-50);
}

/* Dark mode adjustment for selected model cards */
@media (prefers-color-scheme: dark) {
    .model-card.selected {
        background: rgba(59, 130, 246, 0.15);
    }
}

.model-card-icon {
    font-size: 1.5rem;
}

.model-card-label {
    font-size: 0.8125rem;
    font-weight: 600;
    text-align: center;
}

/* ─── Tool Use Indicators ─── */
.tool-indicator {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 2px 8px;
    margin-bottom: var(--space-xs);
    font-size: 0.75rem;
    color: var(--text-muted);
    background: var(--surface-raised);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
}

.tool-indicator.tool-failed {
    color: #e57373;
    border-color: rgba(229, 115, 115, 0.3);
    background: rgba(229, 115, 115, 0.08);
}

.tool-indicators {
    display: flex;
    flex-wrap: wrap;
    gap: 4px;
    margin-bottom: var(--space-xs);
}