:root {
  color-scheme: dark;
  --bg: #0c0d11;
  --panel: #111319;
  --panel-2: #171920;
  --panel-3: #1d2028;
  --line: rgba(255, 255, 255, 0.08);
  --line-strong: rgba(255, 255, 255, 0.14);
  --text: #f5f2eb;
  --muted: #9c9da7;
  --faint: #676a75;
  --accent: #f4a261;
  --accent-2: #9b87f5;
  --green: #58d6a1;
  --danger: #ff7b7b;
  --sidebar: 280px;
  --radius: 18px;
  font-family: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* { box-sizing: border-box; }
html, body { margin: 0; height: 100%; background: var(--bg); color: var(--text); }
body { overflow: hidden; }
button, textarea, input, select { font: inherit; }
button { color: inherit; }

.app-shell { display: grid; grid-template-columns: var(--sidebar) 1fr; height: 100dvh; }
.sidebar {
  background: linear-gradient(180deg, #111218 0%, #0e0f14 100%);
  border-right: 1px solid var(--line);
  padding: 22px 16px 18px;
  display: flex;
  flex-direction: column;
  min-width: 0;
  z-index: 30;
}
.brand { display: flex; gap: 12px; align-items: center; padding: 0 7px 22px; }
.brand strong { display: block; letter-spacing: -0.02em; }
.brand small { color: var(--faint); font-size: 11px; }
.spinor-mark { width: 35px; height: 35px; position: relative; display: grid; place-items: center; }
.spinor-mark::after { content: "ψ"; color: var(--text); font-family: Georgia, serif; font-size: 19px; z-index: 2; }
.spinor-mark span { position: absolute; width: 31px; height: 15px; border: 1px solid var(--accent-2); border-radius: 50%; transform: rotate(25deg); }
.spinor-mark span:last-child { border-color: var(--accent); transform: rotate(-32deg); }

.new-chat, .sidebar-action, .history-item, .suggestion, .icon-button, .send-button, .attach-button {
  border: 0; cursor: pointer; transition: 150ms ease;
}
.new-chat { background: var(--text); color: #111218; border-radius: 12px; padding: 11px 13px; font-weight: 700; text-align: left; }
.new-chat:hover { background: white; transform: translateY(-1px); }
.new-chat span { margin-right: 8px; }
.history-label { color: var(--faint); font-size: 10px; letter-spacing: .15em; text-transform: uppercase; margin: 25px 9px 9px; }
.history { display: flex; flex-direction: column; gap: 3px; overflow-y: auto; min-height: 80px; }
.history-item { background: transparent; color: var(--muted); border-radius: 10px; padding: 10px 11px; text-align: left; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; font-size: 13px; }
.history-item:hover, .history-item.active { color: var(--text); background: var(--panel-3); }
.sidebar-footer { margin-top: auto; border-top: 1px solid var(--line); padding-top: 12px; }
.sidebar-action { display: block; width: 100%; text-align: left; padding: 9px 8px; background: transparent; color: var(--muted); font-size: 12px; border-radius: 8px; }
.sidebar-action:hover { color: var(--text); background: var(--panel-3); }
.sidebar-action span { display: inline-block; width: 20px; }
.privacy-note { color: var(--faint); font-size: 10px; padding: 12px 8px 0; }
.privacy-dot { display: inline-block; width: 6px; height: 6px; border-radius: 50%; background: var(--green); margin-right: 6px; box-shadow: 0 0 9px var(--green); }

.workspace { min-width: 0; display: grid; grid-template-rows: 72px 1fr auto; height: 100dvh; background: radial-gradient(circle at 50% 18%, rgba(155, 135, 245, .055), transparent 34%), var(--bg); }
.topbar { display: flex; align-items: center; justify-content: space-between; border-bottom: 1px solid var(--line); padding: 0 25px; backdrop-filter: blur(18px); }
.eyebrow { display: block; color: var(--faint); font-size: 9px; font-weight: 800; letter-spacing: .18em; margin-bottom: 5px; }
.model-row { display: flex; align-items: center; gap: 10px; }
.model-row strong { font-size: 14px; }
.status-pill { color: var(--muted); border: 1px solid var(--line); border-radius: 999px; padding: 4px 8px; font-size: 10px; }
.status-pill i { display: inline-block; width: 6px; height: 6px; border-radius: 50%; background: var(--accent); margin-right: 5px; }
.status-pill.ready i { background: var(--green); box-shadow: 0 0 7px rgba(88,214,161,.8); }
.status-pill.error i { background: var(--danger); }
.topbar-actions { display: flex; align-items: center; gap: 8px; }
.mode-select, .setting-group input, .setting-group textarea { background: var(--panel-2); border: 1px solid var(--line); border-radius: 10px; color: var(--text); outline: none; }
.mode-select { padding: 8px 31px 8px 11px; font-size: 12px; }
.icon-button { width: 36px; height: 36px; border-radius: 10px; background: var(--panel-2); border: 1px solid var(--line); display: grid; place-items: center; }
.icon-button:hover { background: var(--panel-3); border-color: var(--line-strong); }
.mobile-menu { display: none; }

.chat-stage { overflow-y: auto; min-height: 0; scroll-behavior: smooth; }
.empty-state { min-height: 100%; display: flex; flex-direction: column; align-items: center; justify-content: center; padding: 38px 24px 24px; text-align: center; }
.empty-state.hidden { display: none; }
.hero-orbit { width: 90px; height: 90px; position: relative; display: grid; place-items: center; margin-bottom: 19px; }
.hero-orbit b { font: 36px Georgia, serif; font-weight: 400; }
.hero-orbit span { position: absolute; border: 1px solid rgba(155, 135, 245, .7); width: 83px; height: 34px; border-radius: 50%; transform: rotate(24deg); box-shadow: 0 0 20px rgba(155,135,245,.08); }
.hero-orbit .orbit-two { border-color: rgba(244, 162, 97, .75); transform: rotate(-34deg); }
.hero-kicker { color: var(--accent); font-size: 9px; letter-spacing: .23em; font-weight: 800; }
.empty-state h1 { font: 500 clamp(30px, 4.5vw, 48px) Georgia, serif; letter-spacing: -.035em; margin: 12px 0 11px; }
.empty-state > p { color: var(--muted); line-height: 1.6; max-width: 610px; margin: 0; font-size: 14px; }
.suggestion-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 250px)); gap: 9px; margin-top: 32px; }
.suggestion { background: rgba(23,25,32,.84); border: 1px solid var(--line); border-radius: 13px; text-align: left; padding: 14px 15px; }
.suggestion:hover { border-color: rgba(155,135,245,.42); transform: translateY(-2px); background: var(--panel-3); }
.suggestion span { display: block; color: var(--faint); font-size: 9px; text-transform: uppercase; letter-spacing: .14em; margin-bottom: 5px; }
.suggestion strong { font-size: 13px; }

.messages { max-width: 820px; margin: 0 auto; padding: 36px 24px 60px; }
.message { display: grid; grid-template-columns: 34px minmax(0, 1fr); gap: 13px; margin: 0 0 28px; animation: rise .23s ease; }
@keyframes rise { from { opacity: 0; transform: translateY(6px); } }
.avatar { width: 32px; height: 32px; display: grid; place-items: center; border-radius: 10px; background: var(--panel-3); border: 1px solid var(--line); color: var(--muted); font-size: 13px; }
.message.assistant .avatar { color: var(--accent-2); font-family: Georgia, serif; }
.message-head { color: var(--faint); font-size: 10px; margin: 2px 0 7px; text-transform: uppercase; letter-spacing: .11em; }
.message-content { color: #dddbe0; font-size: 14px; line-height: 1.72; overflow-wrap: anywhere; }
.message-content p { margin: 0 0 10px; }
.message-content code { background: #20232b; color: #f0c49c; padding: 2px 5px; border-radius: 5px; font: 12px ui-monospace, SFMono-Regular, Menlo, monospace; }
.message-content pre { background: #090a0d; border: 1px solid var(--line); padding: 14px; border-radius: 12px; overflow-x: auto; }
.message-content pre code { background: transparent; padding: 0; color: #d8d8e5; }
.cursor::after { content: ""; display: inline-block; width: 6px; height: 15px; background: var(--accent-2); margin-left: 3px; vertical-align: -2px; animation: blink .8s steps(1) infinite; }
@keyframes blink { 50% { opacity: 0; } }

.composer-wrap { padding: 8px 24px 17px; background: linear-gradient(180deg, transparent, var(--bg) 25%); }
.composer, .knowledge-strip, .composer-meta { max-width: 820px; margin-left: auto; margin-right: auto; }
.composer { background: #17191f; border: 1px solid var(--line-strong); border-radius: 18px; display: flex; align-items: flex-end; gap: 8px; padding: 9px; box-shadow: 0 16px 45px rgba(0,0,0,.28); }
.composer:focus-within { border-color: rgba(155,135,245,.47); box-shadow: 0 16px 50px rgba(0,0,0,.35), 0 0 0 3px rgba(155,135,245,.07); }
.composer textarea { flex: 1; resize: none; border: 0; outline: 0; background: transparent; color: var(--text); min-height: 37px; max-height: 160px; line-height: 1.55; padding: 8px 3px; }
.composer textarea::placeholder { color: var(--faint); }
.attach-button, .send-button { flex: 0 0 37px; width: 37px; height: 37px; display: grid; place-items: center; border-radius: 11px; }
.attach-button { background: transparent; color: var(--muted); font-size: 21px; }
.attach-button:hover { color: var(--text); background: var(--panel-3); }
.attach-button input { display: none; }
.send-button { background: var(--text); color: #111218; font-size: 20px; font-weight: 700; }
.send-button:hover { background: white; transform: translateY(-1px); }
.send-button:disabled { opacity: .35; cursor: not-allowed; transform: none; }
.composer-meta { display: flex; justify-content: space-between; color: var(--faint); font-size: 9px; padding: 7px 6px 0; }
kbd { font: inherit; border: 1px solid var(--line-strong); border-radius: 4px; padding: 1px 4px; }
.knowledge-strip { display: flex; gap: 7px; overflow-x: auto; padding: 0 2px 8px; }
.knowledge-chip { border: 1px solid rgba(244,162,97,.3); color: #e8c4a7; background: rgba(244,162,97,.08); border-radius: 999px; padding: 5px 9px; font-size: 10px; white-space: nowrap; }

.settings-panel { position: fixed; z-index: 60; top: 0; right: 0; height: 100dvh; width: min(420px, 94vw); background: #12141a; border-left: 1px solid var(--line); padding: 25px; transform: translateX(102%); transition: transform .22s ease; overflow-y: auto; }
.settings-panel.open { transform: translateX(0); }
.scrim { position: fixed; inset: 0; background: rgba(0,0,0,.58); backdrop-filter: blur(3px); z-index: 50; }
.settings-header { display: flex; justify-content: space-between; align-items: flex-start; margin-bottom: 28px; }
.settings-header h2 { font: 27px Georgia, serif; margin: 0; }
.setting-group { margin-bottom: 20px; }
.setting-group label { display: flex; justify-content: space-between; color: var(--muted); font-size: 11px; margin: 0 0 8px; }
.setting-group textarea, .setting-group input[type="url"] { width: 100%; padding: 11px; resize: vertical; color: var(--text); }
.setting-group input:focus, .setting-group textarea:focus { border-color: rgba(155,135,245,.5); }
.setting-group input[type="range"] { accent-color: var(--accent-2); width: 100%; }
.setting-group small, .toggle-row small, .runtime-card small { display: block; color: var(--faint); font-size: 10px; line-height: 1.45; margin-top: 7px; }
.setting-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 15px; }
.toggle-row { display: flex; justify-content: space-between; align-items: center; gap: 20px; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); padding: 17px 0; margin: 8px 0 20px; }
.toggle-row strong { font-size: 12px; }
.toggle-row input { width: 36px; height: 20px; accent-color: var(--accent-2); }
.runtime-card { display: flex; gap: 12px; background: var(--panel-2); border: 1px solid var(--line); padding: 13px; border-radius: 13px; }
.runtime-icon { width: 31px; height: 31px; border: 1px solid rgba(155,135,245,.35); border-radius: 9px; display: grid; place-items: center; color: var(--accent-2); }
.runtime-card strong { font-size: 12px; }

.load-modal { position: fixed; z-index: 100; left: 50%; top: 50%; transform: translate(-50%, -50%); width: min(370px, calc(100vw - 32px)); background: #171920; border: 1px solid var(--line-strong); border-radius: 20px; box-shadow: 0 30px 100px rgba(0,0,0,.65); padding: 27px; text-align: center; }
.load-modal strong { display: block; font-size: 15px; margin-top: 13px; }
.load-modal p { color: var(--muted); font-size: 11px; min-height: 16px; }
.load-modal small { color: var(--faint); font-size: 9px; }
.loader-orbit { width: 54px; height: 54px; display: grid; place-items: center; margin: auto; position: relative; }
.loader-orbit span { position: absolute; inset: 5px; border: 1px solid var(--accent-2); border-radius: 50%; animation: orbit 1.4s linear infinite; }
.loader-orbit span::after { content: ""; position: absolute; top: -3px; left: 20px; width: 6px; height: 6px; background: var(--accent); border-radius: 50%; }
.loader-orbit b { font: 21px Georgia, serif; }
@keyframes orbit { to { transform: rotate(360deg); } }
.progress-track { height: 5px; background: #252832; border-radius: 99px; overflow: hidden; margin: 17px 0 10px; }
.progress-track div { height: 100%; width: 4%; background: linear-gradient(90deg, var(--accent-2), var(--accent)); border-radius: inherit; transition: width .2s; }
.toast { position: fixed; z-index: 120; bottom: 25px; left: 50%; transform: translateX(-50%); color: var(--text); background: #232630; border: 1px solid var(--line-strong); border-radius: 10px; padding: 10px 14px; font-size: 11px; box-shadow: 0 12px 35px rgba(0,0,0,.4); }
.hidden { display: none !important; }

@media (max-width: 760px) {
  html, body, .app-shell { width: 100vw; max-width: 100vw; overflow: hidden; }
  .app-shell { display: block; }
  .workspace { width: 100vw; max-width: 100vw; overflow: hidden; }
  .sidebar { position: fixed; inset: 0 auto 0 0; width: min(285px, 88vw); transform: translateX(-102%); transition: transform .2s; box-shadow: 20px 0 60px rgba(0,0,0,.4); }
  .sidebar.open { transform: translateX(0); }
  .mobile-menu { display: grid; }
  .topbar { padding: 0 14px; }
  .model-identity { display: none; }
  .mobile-menu { margin-right: auto; }
  .status-pill { display: none; }
  .mode-select { width: 145px; max-width: 145px; }
  .topbar-actions { min-width: 0; }
  .chat-stage, .composer-wrap { width: 100vw; max-width: 100vw; overflow-x: hidden; }
  .empty-state { width: 100%; overflow: hidden; }
  .empty-state h1 { max-width: 345px; font-size: 33px; line-height: 1.08; }
  .empty-state > p { max-width: 345px; }
  .suggestion-grid { grid-template-columns: 1fr; width: 100%; max-width: 360px; }
  .suggestion:nth-child(n+3) { display: none; }
  .messages { padding-left: 15px; padding-right: 15px; }
  .composer-wrap { padding-left: 10px; padding-right: 10px; }
  .composer { width: calc(100vw - 20px); max-width: calc(100vw - 20px); }
  .composer textarea { min-width: 0; }
  .composer-meta span:first-child { display: none; }
  .composer-meta { justify-content: flex-end; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 1ms !important; transition-duration: 1ms !important; scroll-behavior: auto !important; }
}