.main-content { flex: 1; min-width: 0; display: flex; flex-direction: column; background: var(--surface); border-left: 1px solid var(--border); }
.top-header { display: flex; align-items: center; justify-content: space-between; gap: 16px; padding: 18px 28px; border-bottom: 1px solid var(--border); flex-shrink: 0; }
.model-select, .header-actions, .header-home-link, .theme-toggle { display: flex; align-items: center; gap: 10px; }
.model-select { font-weight: 700; }
.product-mark { display: grid; place-items: center; width: 36px; height: 36px; background: var(--accent); color: var(--on-accent); font: bold 15px Georgia, serif; border-radius: 4px; }
.header-home-link, .theme-toggle { min-height: 44px; padding: 8px 12px; border: 1px solid var(--border); border-radius: 6px; background: transparent; color: var(--text); text-decoration: none; font-size: 13px; }
.header-home-link:hover, .theme-toggle:hover { background: var(--soft); }
.mobile-menu-btn { display: none; }
.center-container { display: flex; flex-direction: column; flex: 1; min-height: 0; width: 100%; max-width: 1000px; margin: 0 auto; }
#welcomeScreen { flex: 1; min-height: 0; overflow-y: auto; padding: 36px; align-content: center; }
.greeting-area { max-width: 660px; margin: 0 auto; }
.eyebrow { color: var(--accent); font-size: 12px; font-weight: 700; letter-spacing: .12em; text-transform: uppercase; }
.greeting-area h1 { margin: 20px 0; font: 500 clamp(36px, 4vw, 58px)/1.12 Georgia, serif; letter-spacing: -.025em; }
.greeting-area h2 { font-size: 19px; font-weight: 500; margin: 0 0 12px; }
.welcome-note { color: var(--muted); max-width: 480px; }
.welcome-details { display: flex; flex-wrap: wrap; gap: 12px 24px; margin-top: 28px; color: var(--muted); font-size: 12px; }
.welcome-details > span { display: flex; align-items: center; gap: 6px; }
.chat-container { display: none; flex: 1; min-height: 0; overflow-y: auto; overscroll-behavior: contain; scrollbar-color: var(--border) transparent; flex-direction: column; gap: 24px; padding: 28px; }
.message-row { display: flex; align-items: flex-start; gap: 12px; min-width: 0; flex-shrink: 0; }
.message-row.user { justify-content: flex-end; }
.user-bubble, .bot-bubble { min-width: 0; white-space: pre-line; overflow-wrap: anywhere; font-size: 15px; line-height: 1.7; }
.user-bubble { max-width: 85%; background: var(--soft); padding: 12px 18px; border-radius: 8px; }
.bot-bubble { flex: 1; overflow-x: auto; padding: 4px 0; }
.bot-icon { display: grid; place-items: center; flex-shrink: 0; width: 30px; height: 30px; background: var(--soft); color: var(--accent); border: 1px solid var(--border); border-radius: 4px; }
.bot-icon::before { content: 'S'; font: bold 17px Georgia, serif; }
.loading-dots { display: inline-flex; align-items: center; gap: 5px; padding: 8px 0; }
.dot { width: 6px; height: 6px; background: var(--muted); border-radius: 50%; animation: loading-dot 1s infinite alternate; }
.dot:nth-child(2) { animation-delay: .15s; }
.dot:nth-child(3) { animation-delay: .3s; }
@keyframes loading-dot { to { opacity: .3; } }
.typing-cursor::after { content: '|'; }
.result-header { color: var(--accent); margin-bottom: 8px; }
.result-table, .cm-table { width: 100%; border-collapse: collapse; font-size: 13px; background: var(--surface); white-space: normal; }
.result-table th, .result-table td, .cm-table th, .cm-table td { text-align: left; padding: 10px; border: 1px solid var(--border); }
.result-table th, .cm-table th { background: var(--soft); }
.result-table td { white-space: pre-wrap; overflow-wrap: anywhere; min-width: 96px; }
.preview-note { color: var(--muted); font-size: 12px; }
.result-controls { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 12px; }
.download-btn, .eval-btn, .download-metrics-btn { padding: 10px 14px; min-height: 44px; border: 1px solid var(--accent); border-radius: 5px; background: var(--accent); color: var(--on-accent); font-size: 13px; }
.eval-btn { background: var(--surface); color: var(--accent); }
.download-btn:hover, .eval-btn:hover, .download-metrics-btn:hover { text-decoration: underline; }
.progress-header, .progress-percent { color: var(--muted); font-size: 13px; }
.progress-area, .progress-meta { display: flex; align-items: center; gap: 10px; }
.progress-area { flex-wrap: wrap; }
.progress-bar { width: 240px; max-width: 100%; height: 8px; background: var(--soft); border: 1px solid var(--border); border-radius: 3px; overflow: hidden; }
.progress-fill { height: 100%; width: 0; background: var(--accent); transition: width .18s linear; }
.evaluation-container:empty { display: none; }
.evaluation-container { margin-top: 16px; padding: 14px; border: 1px solid var(--border); border-radius: 6px; white-space: normal; }
.metrics-box > div:first-child { color: var(--text); }
.metrics-list { display: grid; grid-template-columns: repeat(auto-fit, minmax(110px, 1fr)); gap: 8px; }
.metric-row { display: flex; flex-direction: column; gap: 4px; background: var(--soft); padding: 10px; border-radius: 4px; }
.metric-row span:first-child { font-size: 12px; color: var(--muted); }
.metric-row span:last-child { font-weight: 700; color: var(--accent); }
.evaluation-container canvas { width: 240px; max-width: 100%; height: auto; background: var(--surface); }
.eval-warn, .eval-error { border-left: 3px solid var(--accent); padding: 10px; color: var(--text); }
.eval-error { border-color: var(--danger); color: var(--danger); }
@media (max-width: 1000px) { .header-home-link { display: none; } .top-header { padding: 12px 20px; } }
@media (max-width: 768px) {
    .main-content { border: 0; }
    .top-header { gap: 10px; padding: 10px 12px; }
    .mobile-menu-btn { display: grid; place-items: center; min-width: 44px; min-height: 44px; border: 1px solid var(--border); border-radius: 5px; background: transparent; color: var(--text); }
    .model-select { flex: 1; font-size: 14px; gap: 8px; }
    .product-mark { display: none; }
    .theme-toggle { padding: 10px; }
    .theme-label { display: none; }
    #welcomeScreen { padding: 24px 20px; }
    .greeting-area h1 { font-size: clamp(32px, 8vw, 46px); margin: 12px 0 16px; }
    .greeting-area h2 { font-size: 16px; }
    .welcome-note { font-size: 14px; }
    .welcome-details { margin-top: 16px; gap: 8px; }
    .chat-container { padding: 20px 12px; gap: 20px; }
    .message-row { gap: 8px; }
    .bot-icon { width: 24px; height: 28px; }
    .user-bubble { max-width: 92%; }
    .evaluation-container { padding: 8px; }
}
@media (max-height: 600px) { .greeting-area h1 { font-size: 30px; } .welcome-details, .greeting-area h2 { display: none; } #welcomeScreen { padding: 12px 20px; } .eyebrow, .welcome-note { margin: 8px 0; } }