:root {
  --bg: #0b0d0f;
  --surface: #14181c;
  --surface-2: #1b2025;
  --line: #2c333a;
  --text: #f4f2eb;
  --muted: #a8b0b8;
  --accent: #d4a72c;
  --accent-dark: #aa8117;
  --danger: #ff8278;
  --success: #61d095;
  --radius: 16px;
  --shadow: 0 20px 60px rgba(0,0,0,.28);
}
* { box-sizing: border-box; }
html { color-scheme: dark; scroll-behavior: smooth; }
body { margin: 0; min-height: 100vh; background: radial-gradient(circle at top right, rgba(212,167,44,.08), transparent 30%), var(--bg); color: var(--text); font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif; line-height: 1.55; }
a { color: inherit; text-decoration: none; }
a:hover { color: var(--accent); }
button, input, textarea { font: inherit; }
button { color: inherit; }
.site-header { min-height: 72px; padding: 12px clamp(18px, 4vw, 64px); border-bottom: 1px solid var(--line); display: flex; align-items: center; justify-content: space-between; gap: 24px; position: sticky; top: 0; z-index: 10; background: rgba(11,13,15,.93); backdrop-filter: blur(16px); }
.brand { display: flex; align-items: center; gap: 11px; }
.brand-mark { width: 38px; height: 38px; display: inline-grid; place-items: center; border: 1px solid var(--accent); border-radius: 11px; color: var(--accent); font-weight: 900; background: linear-gradient(145deg, #2a2415, #131517); box-shadow: inset 0 0 18px rgba(212,167,44,.12); }
.brand-mark.large { width: 54px; height: 54px; font-size: 1.35rem; border-radius: 15px; }
.brand strong, .brand small { display: block; line-height: 1.05; }
.brand small { margin-top: 4px; color: var(--muted); font-size: .68rem; letter-spacing: .14em; text-transform: uppercase; }
.site-nav { display: flex; align-items: center; gap: 24px; font-size: .94rem; }
.nav-toggle { display: none; background: none; border: 0; font-size: 1.45rem; }
.inline-form { display: inline; margin: 0; }
.link-button, .text-button { border: 0; background: none; cursor: pointer; padding: 0; color: var(--muted); }
.link-button:hover, .text-button:hover { color: var(--accent); }
.environment-banner { text-align: center; padding: 7px 16px; font-size: .78rem; color: #dfc76f; background: #29220f; border-bottom: 1px solid #4a3c14; }
.page-shell { width: min(1180px, calc(100% - 36px)); margin: 0 auto; padding: clamp(42px, 6vw, 88px) 0 80px; min-height: calc(100vh - 145px); }
.site-footer { border-top: 1px solid var(--line); padding: 24px clamp(18px, 4vw, 64px); display: flex; justify-content: space-between; gap: 20px; color: var(--muted); font-size: .82rem; }
.hero { min-height: 560px; align-items: center; }
.two-column { display: grid; grid-template-columns: 1.1fr .9fr; gap: clamp(40px, 7vw, 90px); }
.eyebrow { display: inline-block; color: var(--accent); letter-spacing: .16em; font-size: .72rem; font-weight: 800; margin-bottom: 12px; }
h1, h2, h3, p { margin-top: 0; }
h1 { font-size: clamp(2.25rem, 5.5vw, 5rem); line-height: .98; letter-spacing: -.055em; max-width: 900px; }
h2 { font-size: clamp(1.35rem, 2.5vw, 2rem); line-height: 1.15; letter-spacing: -.025em; }
.hero-copy, .page-heading p, .auth-copy p { color: var(--muted); font-size: clamp(1rem, 1.5vw, 1.2rem); max-width: 680px; }
.button-row { display: flex; flex-wrap: wrap; gap: 12px; margin: 28px 0 18px; }
.button { display: inline-flex; min-height: 46px; align-items: center; justify-content: center; border: 1px solid var(--accent); border-radius: 11px; padding: 10px 18px; background: var(--accent); color: #15130c; font-weight: 800; cursor: pointer; transition: transform .15s, background .15s; }
.button:hover { color: #15130c; background: #e2b83f; transform: translateY(-1px); }
.button-secondary { background: transparent; color: var(--text); border-color: var(--line); }
.button-secondary:hover { color: var(--text); background: var(--surface-2); }
.button-small { min-height: 38px; padding: 7px 13px; }
.button-full { width: 100%; }
.fine-print, small { color: var(--muted); font-size: .8rem; }
.hero-card, .panel { background: linear-gradient(145deg, rgba(27,32,37,.96), rgba(19,23,27,.96)); border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow); }
.hero-card { padding: clamp(24px, 4vw, 38px); transform: rotate(1deg); }
.chat-preview-label { color: var(--accent); font-size: .72rem; font-weight: 800; letter-spacing: .16em; }
.preview-question { font-size: 1.35rem; font-weight: 750; margin: 18px 0; }
.preview-answer { border-left: 3px solid var(--accent); padding: 3px 0 3px 18px; }
.preview-answer p { color: var(--muted); margin: 5px 0 0; }
.confidence-row { display: flex; align-items: center; justify-content: space-between; gap: 15px; padding: 14px 0; margin-top: 20px; border-top: 1px solid var(--line); color: var(--muted); }
.confidence-row strong { color: var(--text); }
.source-pills { display: flex; flex-wrap: wrap; gap: 8px; }
.source-pills span { border: 1px solid var(--line); border-radius: 999px; padding: 5px 10px; color: var(--muted); font-size: .75rem; }
.feature-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; margin-top: 40px; }
.feature-card { border-top: 1px solid var(--line); padding: 24px 4px; }
.feature-card > span { color: var(--accent); font-size: .78rem; }
.feature-card h2 { font-size: 1.15rem; margin: 13px 0 8px; }
.feature-card p { color: var(--muted); font-size: .9rem; }
.auth-layout { display: grid; grid-template-columns: .9fr 1.1fr; align-items: start; gap: clamp(40px, 8vw, 100px); max-width: 1000px; margin: 0 auto; }
.compact-auth { max-width: 920px; }
.auth-copy h1 { font-size: clamp(2.5rem, 5vw, 4.5rem); }
.panel { padding: clamp(22px, 3vw, 34px); }
.form-panel label, .form-panel legend { display: block; font-weight: 700; font-size: .9rem; }
.form-panel input[type="email"], .form-panel input[type="password"], .form-panel input[type="text"], .form-panel input:not([type]) { width: 100%; margin-top: 7px; border: 1px solid var(--line); background: #0f1215; color: var(--text); border-radius: 10px; padding: 12px 13px; outline: none; }
.form-panel input:focus, textarea:focus { border-color: var(--accent); box-shadow: 0 0 0 3px rgba(212,167,44,.13); }
.form-panel > label { margin-bottom: 18px; }
.form-panel fieldset { border: 0; padding: 0; margin: 0 0 20px; }
.radio-card, .mode-card { display: flex !important; align-items: flex-start; gap: 11px; border: 1px solid var(--line); padding: 13px; border-radius: 11px; margin-top: 9px; cursor: pointer; }
.radio-card:has(input:checked), .mode-card:has(input:checked) { border-color: var(--accent); background: rgba(212,167,44,.07); }
.radio-card input, .mode-card input { margin-top: 5px; accent-color: var(--accent); }
.radio-card strong, .radio-card small, .mode-card strong, .mode-card small { display: block; }
.alert { border-radius: 10px; padding: 13px 15px; margin-bottom: 18px; }
.alert-error { color: #ffd7d2; background: rgba(255,130,120,.11); border: 1px solid rgba(255,130,120,.35); }
.alert ul { margin-bottom: 0; }
.form-foot { margin: 18px 0 0; text-align: center; color: var(--muted); font-size: .86rem; }
.form-foot a { color: var(--accent); }
.page-heading { display: flex; align-items: flex-end; justify-content: space-between; gap: 30px; margin-bottom: 36px; }
.page-heading h1 { font-size: clamp(2.3rem, 5vw, 4.4rem); margin-bottom: 12px; }
.page-heading p { margin-bottom: 0; }
.stat-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; margin-bottom: 20px; }
.stat-card { background: var(--surface); border: 1px solid var(--line); border-radius: 13px; padding: 20px; }
.stat-card span, .stat-card strong { display: block; }
.stat-card span { color: var(--muted); font-size: .78rem; text-transform: uppercase; letter-spacing: .08em; }
.stat-card strong { font-size: 1.55rem; margin-top: 8px; }
.capitalize { text-transform: capitalize; }
.dashboard-grid, .admin-grid { display: grid; grid-template-columns: 1.2fr .8fr; gap: 20px; }
.section-heading { display: flex; justify-content: space-between; align-items: flex-end; gap: 20px; margin-bottom: 14px; }
.section-heading h2 { margin-bottom: 0; }
.section-heading > a { color: var(--accent); font-size: .86rem; }
.conversation-list { border-top: 1px solid var(--line); }
.conversation-row { display: flex; justify-content: space-between; align-items: center; gap: 20px; padding: 15px 3px; border-bottom: 1px solid var(--line); }
.conversation-row strong, .conversation-row small { display: block; }
.conversation-row small { margin-top: 2px; }
.conversation-row time { color: var(--muted); font-size: .78rem; }
.check-list { list-style: none; padding: 0; margin: 20px 0 0; }
.check-list li { padding: 8px 0 8px 28px; position: relative; border-bottom: 1px solid var(--line); }
.check-list li::before { content: "✓"; position: absolute; left: 2px; color: var(--success); font-weight: 900; }
.empty-state { padding: 30px 0; color: var(--muted); text-align: center; }
.empty-state a { color: var(--accent); }
.chat-layout { display: grid; grid-template-columns: 310px 1fr; gap: 20px; min-height: 690px; }
.chat-sidebar, .chat-main { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); }
.chat-sidebar { padding: 24px; }
.chat-sidebar h1 { font-size: 2rem; margin-bottom: 22px; }
.mode-list { display: grid; gap: 9px; }
.mode-card { margin-top: 0; padding: 12px; }
.mode-card small { margin-top: 3px; line-height: 1.35; }
.beta-note { margin-top: 22px; padding: 14px; border: 1px dashed #5a491c; border-radius: 10px; color: #d8c378; background: rgba(212,167,44,.06); }
.beta-note p { margin: 4px 0 0; font-size: .8rem; }
.chat-main { display: grid; grid-template-rows: auto 1fr auto; overflow: hidden; }
.chat-header { padding: 16px 20px; border-bottom: 1px solid var(--line); display: flex; align-items: center; justify-content: space-between; }
.status-dot { display: inline-block; width: 8px; height: 8px; border-radius: 50%; background: var(--success); margin-right: 8px; box-shadow: 0 0 0 5px rgba(97,208,149,.09); }
.messages { padding: 24px; overflow-y: auto; max-height: 560px; }
.welcome-message { min-height: 430px; display: grid; place-content: center; justify-items: center; text-align: center; color: var(--muted); }
.welcome-message h2 { color: var(--text); margin: 20px 0 8px; }
.welcome-message p { max-width: 560px; }
.message { max-width: 82%; margin-bottom: 20px; }
.message.user { margin-left: auto; }
.message-label { color: var(--muted); font-size: .72rem; letter-spacing: .08em; text-transform: uppercase; margin-bottom: 5px; }
.message.user .message-label { text-align: right; }
.message-body { padding: 15px 17px; border: 1px solid var(--line); border-radius: 14px; background: var(--surface-2); }
.message.user .message-body { background: #2a2518; border-color: #51421a; }
.preline { white-space: pre-line; }
.answer-metadata { margin-top: 8px; padding: 0 15px 12px; border: 1px solid var(--line); border-radius: 12px; background: #101316; }
.answer-metadata details { border-top: 1px solid var(--line); padding: 11px 0; }
.answer-metadata summary { cursor: pointer; font-weight: 700; }
.answer-metadata p, .answer-metadata ul { color: var(--muted); margin: 8px 0 0; }
.answer-metadata ul { padding-left: 20px; }
.feedback-row { display: flex; gap: 8px; margin-top: 10px; }
.feedback-button { background: transparent; border: 1px solid var(--line); border-radius: 8px; padding: 5px 9px; cursor: pointer; }
.feedback-button:hover, .feedback-button.selected { border-color: var(--accent); color: var(--accent); }
.composer { border-top: 1px solid var(--line); padding: 16px; background: #101316; }
.composer textarea { width: 100%; resize: vertical; min-height: 78px; max-height: 220px; border: 1px solid var(--line); border-radius: 12px; padding: 13px; background: #0b0e10; color: var(--text); outline: none; }
.composer-footer { display: flex; align-items: center; justify-content: space-between; gap: 18px; margin-top: 9px; }
.composer-footer span { color: var(--muted); font-size: .76rem; }
.loading-dots::after { content: ""; animation: dots 1.2s steps(4,end) infinite; }
@keyframes dots { 0% {content:""} 25% {content:"."} 50% {content:".."} 75%,100% {content:"..."} }
.saved-thread { max-width: 850px; margin: 0 auto; }
.saved-thread .message { max-width: 90%; }
.mode-admin-list { border-top: 1px solid var(--line); }
.admin-row { display: flex; justify-content: space-between; align-items: center; gap: 20px; padding: 14px 0; border-bottom: 1px solid var(--line); }
.admin-row strong, .admin-row small { display: block; }
.status-button { border-radius: 999px; padding: 6px 11px; cursor: pointer; border: 1px solid var(--line); background: transparent; font-size: .78rem; }
.status-button.enabled { color: var(--success); border-color: rgba(97,208,149,.35); }
.status-button.disabled { color: var(--danger); border-color: rgba(255,130,120,.35); }
.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; font-size: .86rem; }
th, td { text-align: left; padding: 11px 9px; border-bottom: 1px solid var(--line); vertical-align: top; }
th { color: var(--muted); font-size: .72rem; text-transform: uppercase; letter-spacing: .07em; }
.error-page { text-align: center; padding: 80px 0; }
.error-code { color: var(--accent); font-size: 5rem; font-weight: 900; opacity: .55; }
.error-page h1 { font-size: 3rem; margin: 0 auto 12px; }
.error-page p { color: var(--muted); }
.sr-only { position: absolute !important; width: 1px !important; height: 1px !important; padding: 0 !important; margin: -1px !important; overflow: hidden !important; clip: rect(0,0,0,0) !important; white-space: nowrap !important; border: 0 !important; }
@media (max-width: 920px) {
  .two-column, .auth-layout, .dashboard-grid, .admin-grid { grid-template-columns: 1fr; }
  .feature-grid, .stat-grid { grid-template-columns: repeat(2, 1fr); }
  .hero { min-height: auto; }
  .hero-card { transform: none; }
  .chat-layout { grid-template-columns: 1fr; }
  .chat-sidebar { order: 2; }
  .chat-main { min-height: 650px; }
}
@media (max-width: 680px) {
  .site-header { min-height: 64px; }
  .nav-toggle { display: block; }
  .site-nav { display: none; position: absolute; top: 64px; left: 0; right: 0; background: #0d1012; border-bottom: 1px solid var(--line); padding: 18px; flex-direction: column; align-items: stretch; gap: 15px; }
  .site-nav.open { display: flex; }
  .site-footer, .page-heading { align-items: flex-start; flex-direction: column; }
  .feature-grid, .stat-grid { grid-template-columns: 1fr; }
  .page-shell { width: min(100% - 24px, 1180px); padding-top: 38px; }
  h1 { font-size: 2.55rem; }
  .message { max-width: 95%; }
  .messages { padding: 16px; }
}