:root {
  --color-teal-3: #4C98B0;
  --color-cyan-3: #4894D0;
  --color-blue-0: #D7E3F7;
  --color-blue-2: #84B0F9;
  --color-blue-3: #548DEC;
  --color-blue-4: #366AD7;
  --color-indigo-3: #7882F5;
  --color-violet-3: #A376EA;

  --color-ink: #0E1214;
  --color-ink-soft: #2A3238;
  --color-paper: #FFFFFF;
  --color-paper-dim: #F7F8FA;
  --color-muted: #6B7280;
  --color-rule: #E6E8EB;
  --color-danger: #B91C1C;

  --color-accent: var(--color-blue-4);
  --color-accent-soft: var(--color-blue-0);

  --spectrum: linear-gradient(90deg, var(--color-teal-3), var(--color-cyan-3), var(--color-blue-3), var(--color-indigo-3), var(--color-violet-3));

  --font-display: "Whitney", "Inter Tight", system-ui, sans-serif;
  --font-body: "Whitney", "Inter", system-ui, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, SFMono-Regular, monospace;

  --fs-h2: clamp(40px, 5vw, 64px);
  --fs-h3: 30px;
  --fs-h4: 22px;
  --fs-lead: 17px;
  --fs-body: 15px;
  --fs-meta: 11px;

  --tracking-display: -0.035em;
  --tracking-h3: -0.02em;
  --tracking-mono: 0.05em;
  --tracking-kicker: 0.1em;

  --space-y: clamp(60px, 8vw, 120px);
  --space-x: clamp(20px, 4vw, 56px);
  --content-max: 1280px;

  --border-hairline: 0.5px solid var(--color-rule);
  --radius: 0;

  --ease-out: cubic-bezier(0.2, 0.7, 0.2, 1);
  --dur-fast: 150ms;
  --dur-base: 300ms;
}

*, *::before, *::after { box-sizing: border-box; }
html, body { margin: 0; padding: 0; background: var(--color-paper-dim); }
body {
  font-family: var(--font-body);
  font-size: var(--fs-body);
  color: var(--color-ink);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
a { color: inherit; text-decoration: none; transition: opacity var(--dur-fast); }
a:hover { opacity: 0.7; }
button { transition: opacity var(--dur-fast); cursor: pointer; }
button:hover { opacity: 0.85; }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
}

.kicker {
  font-family: var(--font-body);
  font-size: 12px;
  letter-spacing: var(--tracking-kicker);
  text-transform: uppercase;
  font-weight: 500;
  color: var(--color-muted);
  margin: 0 0 12px;
}
.meta {
  font-family: var(--font-mono);
  font-size: var(--fs-meta);
  letter-spacing: var(--tracking-mono);
  text-transform: uppercase;
  color: var(--color-muted);
}
.display {
  font-family: var(--font-display);
  font-size: var(--fs-h2);
  font-weight: 500;
  letter-spacing: var(--tracking-display);
  line-height: 0.96;
  margin: 0 0 32px;
}
.lead {
  font-size: var(--fs-lead);
  color: var(--color-ink-soft);
  margin: 0 0 24px;
  max-width: 60ch;
}
.gradient-text {
  background: var(--spectrum);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
  font-style: italic;
  font-weight: 600;
}

.shell {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}
.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px var(--space-x);
  border-bottom: var(--border-hairline);
  background: var(--color-paper);
}
.topbar__brand {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 18px;
  letter-spacing: -0.01em;
}
.topbar__brand span { color: var(--color-muted); font-weight: 400; margin-left: 8px; }
.topbar__nav { display: flex; gap: 24px; align-items: center; }
.topbar__nav a { font-size: 14px; }
.topbar__nav .active { font-weight: 600; }
.topbar form { display: inline; }
.topbar__logout {
  background: none;
  border: 0;
  font: inherit;
  color: var(--color-muted);
  padding: 0;
  font-size: 14px;
}

.main {
  flex: 1;
  padding: var(--space-y) var(--space-x);
  max-width: var(--content-max);
  width: 100%;
  margin: 0 auto;
}

/* Login */
.login {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  background: var(--color-paper-dim);
}
.login__card {
  width: 100%;
  max-width: 420px;
  background: var(--color-paper);
  border: var(--border-hairline);
  padding: 48px 40px;
}
.login__card .display { font-size: 36px; margin-bottom: 16px; }
.login__form { display: flex; flex-direction: column; gap: 14px; margin-top: 32px; }
.login__error { color: var(--color-danger); font-size: 13px; margin-top: -4px; }

label { display: flex; flex-direction: column; gap: 6px; font-size: 14px; }
input[type=text], input[type=password], textarea {
  font: inherit;
  font-family: var(--font-mono);
  font-size: 14px;
  padding: 12px 14px;
  border: var(--border-hairline);
  background: var(--color-paper);
  color: var(--color-ink);
  border-radius: var(--radius);
  width: 100%;
  outline: none;
  transition: border-color var(--dur-fast);
}
input:focus, textarea:focus { border-color: var(--color-accent); }
textarea { resize: vertical; min-height: calc(100vh - 280px); line-height: 1.55; tab-size: 2; }
@media (max-width: 640px) { textarea { min-height: calc(100vh - 240px); } }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 22px;
  background: var(--color-ink);
  color: var(--color-paper);
  border: 1px solid var(--color-ink);
  font: inherit;
  font-weight: 500;
  font-size: 14px;
  border-radius: var(--radius);
  cursor: pointer;
}
.btn--ghost {
  background: transparent;
  color: var(--color-ink);
  border-color: var(--color-rule);
}
.btn--danger { background: var(--color-danger); border-color: var(--color-danger); }

/* Dashboard */
.section { margin-bottom: 72px; }
.section__head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  margin-bottom: 20px;
  gap: 24px;
  flex-wrap: wrap;
}
.section__head h2 {
  font-family: var(--font-display);
  font-size: var(--fs-h3);
  font-weight: 500;
  letter-spacing: var(--tracking-h3);
  margin: 0;
}

.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 0;
  border-top: var(--border-hairline);
  border-left: var(--border-hairline);
  background: var(--color-paper);
}
.card {
  padding: 24px 24px 28px;
  border-right: var(--border-hairline);
  border-bottom: var(--border-hairline);
  display: flex;
  flex-direction: column;
  gap: 8px;
  color: inherit;
}
.card:hover { background: var(--color-paper-dim); opacity: 1; }
.card__name {
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 500;
  letter-spacing: -0.01em;
  margin: 0;
}
.card__meta {
  display: flex;
  gap: 16px;
  align-items: center;
  margin-top: 12px;
}
.card__hue {
  display: inline-block;
  width: 32px;
  height: 2px;
  background: var(--hue, var(--color-accent));
}

/* Editor */
.editor__head {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin-bottom: 8px;
  flex-wrap: wrap;
  gap: 16px;
}
.editor__path {
  font-family: var(--font-mono);
  font-size: var(--fs-meta);
  letter-spacing: var(--tracking-mono);
  text-transform: uppercase;
  color: var(--color-muted);
}
.editor__title {
  font-family: var(--font-display);
  font-size: var(--fs-h3);
  font-weight: 500;
  letter-spacing: var(--tracking-h3);
  margin: 0;
}
.editor form { display: flex; flex-direction: column; gap: 16px; margin-top: 24px; }
.editor__bar {
  display: flex;
  gap: 12px;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
}
.editor__bar .left { display: flex; gap: 12px; align-items: center; }
.flash {
  padding: 12px 16px;
  background: var(--color-accent-soft);
  border-left: 2px solid var(--color-accent);
  font-size: 14px;
  margin-bottom: 24px;
}
.flash--err {
  background: #FEF2F2;
  border-left-color: var(--color-danger);
  color: var(--color-danger);
}

@media (max-width: 640px) {
  .topbar { padding: 16px 20px; }
  .topbar__nav { gap: 14px; }
  .login__card { padding: 32px 24px; }
}