:root {
  color-scheme: dark;
  --bg: #0a0a0c;
  --surface: #121216;
  --surface-raised: #19191f;
  --border: #2a2a33;
  --text: #f0eff2;
  --muted: #a2a1ab;
  --quiet: #6d6c76;
  --amber: #f0a83c;
  --amber-dark: #b77316;
  --error: #ff8178;
  --success: #71d39c;
  --focus: #82aeff;
  font-family: "PingFang SC", "Microsoft YaHei", Inter, system-ui, sans-serif;
}

* { box-sizing: border-box; }
body { min-width: 320px; min-height: 100vh; margin: 0; background: radial-gradient(circle at 16% 0%, #242119 0, transparent 30rem), var(--bg); color: var(--text); }
button, input { font: inherit; }
button { cursor: pointer; }
button:disabled { cursor: not-allowed; opacity: .58; }
button:focus-visible, input:focus-visible, a:focus-visible { outline: 3px solid var(--focus); outline-offset: 3px; }

.page-shell { width: min(1120px, calc(100% - 40px)); margin: 0 auto; padding: 24px 0 56px; }
.site-header, .workspace-header, .panel-heading, .secondary-actions { display: flex; align-items: center; justify-content: space-between; gap: 16px; }
.site-header { padding-bottom: 24px; border-bottom: 1px solid var(--border); }
.brand { display: inline-flex; align-items: center; gap: 10px; color: inherit; text-decoration: none; }
.brand-mark { display: grid; width: 36px; height: 36px; place-items: center; border: 1px solid rgba(255,255,255,.18); border-radius: 8px; background: #a43c31; color: #fff; font-weight: 800; }
.brand small, .brand strong { display: block; }
.brand small, .eyebrow { color: var(--quiet); font: 600 11px/1.2 ui-monospace, SFMono-Regular, Menlo, monospace; letter-spacing: .16em; }
.brand strong { margin-top: 3px; font-size: 16px; }
.status-chip { border: 1px solid rgba(240,168,60,.35); border-radius: 999px; padding: 5px 10px; color: var(--amber); background: rgba(240,168,60,.09); font-size: 13px; }

.hero { display: grid; grid-template-columns: minmax(0, 1.2fr) minmax(320px, .8fr); align-items: center; gap: clamp(36px, 8vw, 104px); min-height: min(690px, calc(100vh - 125px)); }
.hero-copy { padding: 48px 0; }
.hero h1, .workspace h1 { margin: 12px 0 20px; font-size: clamp(37px, 5vw, 68px); line-height: 1.08; letter-spacing: -.055em; }
.lede { max-width: 550px; color: var(--muted); font-size: 18px; line-height: 1.8; }
.feature-list { display: grid; gap: 10px; margin: 31px 0 0; padding: 0; color: var(--muted); list-style: none; }
.feature-list li::before { content: "•"; padding-right: 9px; color: var(--amber); }

.auth-card, .project-panel, .create-panel { border: 1px solid var(--border); border-radius: 16px; background: linear-gradient(145deg, rgba(255,255,255,.055), transparent 58%), var(--surface); box-shadow: 0 24px 70px rgba(0,0,0,.22); }
.auth-card { padding: clamp(24px, 4vw, 36px); }
.auth-card h2, .project-panel h2, .create-panel h2 { margin: 10px 0 8px; font-size: 25px; letter-spacing: -.025em; }
.card-copy, .muted { color: var(--muted); line-height: 1.65; }
.card-copy { margin: 0 0 23px; }
form { display: grid; gap: 11px; }
label { font-size: 14px; font-weight: 650; }
input { width: 100%; min-height: 46px; border: 1px solid #40404b; border-radius: 8px; padding: 10px 12px; background: #0d0d11; color: var(--text); }
input::placeholder { color: #73727c; }
input:focus { border-color: var(--focus); }
#code { font: 700 24px/1.15 ui-monospace, SFMono-Regular, Menlo, monospace; letter-spacing: .3em; text-align: center; }
.primary-button, .secondary-button, .text-button { border: 0; border-radius: 8px; min-height: 44px; padding: 10px 15px; font-weight: 700; }
.primary-button { margin-top: 5px; background: var(--amber); color: #211605; }
.primary-button:hover:not(:disabled) { background: #ffc15d; }
.secondary-button { border: 1px solid #454550; background: transparent; color: var(--text); }
.secondary-button:hover { border-color: var(--muted); }
.text-button { min-height: auto; padding: 4px 0; background: transparent; color: var(--amber); text-align: left; }
.text-button:hover:not(:disabled) { color: #ffc15d; text-decoration: underline; }
.turnstile { min-height: 0; margin-top: 4px; overflow: hidden; }
.form-hint { margin: 0; color: var(--quiet); font-size: 13px; line-height: 1.5; }
.form-message { margin: 4px 0 0; font-size: 14px; line-height: 1.5; }
.error { color: var(--error); }
.secondary-actions { margin-top: 20px; }

.workspace { padding-top: 60px; }
.workspace h1 { font-size: clamp(30px, 4vw, 47px); }
.workspace-grid { display: grid; grid-template-columns: minmax(0, 1fr) minmax(280px, .65fr); gap: 20px; margin-top: 28px; }
.project-panel, .create-panel { padding: 26px; }
.panel-heading { align-items: flex-start; }
.panel-heading h2 { margin-top: 0; }
.panel-heading .muted { margin: 5px 0 0; font-size: 14px; }
.project-list { display: grid; gap: 10px; margin-top: 22px; }
.project-card, .empty-state { border: 1px solid #30303a; border-radius: 9px; padding: 15px; background: rgba(255,255,255,.025); }
.project-card h3 { margin: 0 0 5px; font-size: 16px; }
.project-card p, .empty-state { margin: 0; color: var(--muted); font-size: 14px; line-height: 1.55; }
.project-card time { color: var(--quiet); font-size: 12px; }
.site-footer { margin-top: 36px; text-align: center; }
.site-footer a { color: var(--quiet); font-size: 13px; }
.site-footer a:hover { color: var(--text); }

@media (max-width: 760px) {
  .page-shell { width: min(100% - 28px, 560px); padding-top: 14px; }
  .hero { grid-template-columns: 1fr; min-height: auto; gap: 6px; }
  .hero-copy { padding: 54px 0 18px; }
  .hero h1 { font-size: clamp(36px, 12vw, 52px); }
  .lede { font-size: 16px; }
  .workspace-header, .workspace-grid { grid-template-columns: 1fr; align-items: flex-start; }
  .workspace-header { display: grid; }
  .workspace { padding-top: 40px; }
  .workspace-grid { margin-top: 20px; }
}