/* =========================================================================
   InterVisual — landing, auth and account pages.

   Same instrument-panel language as the builder (styles.css): dark ground,
   signal teal, mono for anything numeric. The landing leans on one idea —
   the interval graph is the product, so it is the hero image, drawn in SVG
   rather than shipped as a screenshot.
   ========================================================================= */
:root {
  --bg:        #0e1116;
  --bg-2:      #0b0e13;
  --panel:     #161b22;
  --panel-2:   #1c2230;
  --line:      #2a313d;
  --line-soft: #222834;
  --ink:       #e8edf4;
  --ink-dim:   #9aa6b6;
  --ink-faint: #5f6b7a;
  --accent:    #4cd2c0;
  --accent-dim:#2a8f84;
  --violet:    #6a7bd8;
  --warn:      #e0b341;
  --danger:    #e06a4a;
  --radius:    10px;
  --radius-lg: 16px;
  --mono: "JetBrains Mono", ui-monospace, monospace;
  --sans: "Space Grotesk", system-ui, -apple-system, sans-serif;
  --maxw: 1120px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 15px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
h1, h2, h3 { line-height: 1.15; letter-spacing: -0.02em; margin: 0; }
p { margin: 0; }

.wrap { width: 100%; max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }

/* ---------- brand ---------- */
.brand { display: flex; align-items: center; gap: 10px; }
.brand-mark {
  width: 20px; height: 20px; border-radius: 5px;
  background: linear-gradient(135deg, var(--accent), var(--violet) 60%, var(--warn));
  box-shadow: 0 0 18px -2px var(--accent-dim);
  flex: none;
}
.brand-name { font-weight: 700; font-size: 18px; letter-spacing: -0.02em; }
.brand-accent { color: var(--accent); }

/* ---------- nav ---------- */
.nav {
  position: sticky; top: 0; z-index: 50;
  background: rgba(14, 17, 22, 0.82);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line-soft);
}
.nav-inner {
  display: flex; align-items: center; justify-content: space-between;
  height: 62px; gap: 24px;
}
.nav-links { display: flex; gap: 26px; font-size: 14px; color: var(--ink-dim); }
.nav-links a:hover { color: var(--ink); }
.nav-actions { display: flex; align-items: center; gap: 10px; }
@media (max-width: 820px) { .nav-links { display: none; } }

/* ---------- buttons ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  font-family: var(--sans); font-size: 14px; font-weight: 500;
  padding: 10px 16px; border-radius: 9px;
  border: 1px solid var(--line); background: var(--panel); color: var(--ink);
  cursor: pointer; white-space: nowrap;
  transition: border-color .15s, background .15s, transform .1s;
}
.btn:hover { border-color: var(--accent-dim); background: var(--panel-2); }
.btn:active { transform: translateY(1px); }
.btn.primary {
  background: var(--accent); border-color: var(--accent); color: #06231f; font-weight: 600;
}
.btn.primary:hover { background: #5fe0ce; border-color: #5fe0ce; }
.btn.ghost { background: transparent; }
.btn.lg { padding: 13px 22px; font-size: 15px; }
.btn.block { width: 100%; }
.btn[disabled] { opacity: .5; cursor: not-allowed; }

/* ---------- hero ---------- */
.hero { position: relative; padding: 84px 0 72px; overflow: hidden; }
.hero::before {
  content: ""; position: absolute; inset: -40% 0 auto 50%;
  width: 900px; height: 700px; transform: translateX(-50%);
  background: radial-gradient(closest-side, rgba(76, 210, 192, .12), transparent 70%);
  pointer-events: none;
}
.hero-inner { position: relative; display: grid; gap: 52px; align-items: center; }
@media (min-width: 940px) { .hero-inner { grid-template-columns: 1.05fr 1fr; } }

.eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: var(--mono); font-size: 11px; letter-spacing: .08em; text-transform: uppercase;
  color: var(--accent); background: rgba(76, 210, 192, .08);
  border: 1px solid rgba(76, 210, 192, .22);
  padding: 5px 11px; border-radius: 100px; margin-bottom: 20px;
}
.hero h1 { font-size: clamp(34px, 5vw, 54px); font-weight: 700; }
.hero h1 em { font-style: normal; color: var(--accent); }
.hero-sub {
  margin-top: 20px; font-size: 17px; color: var(--ink-dim); max-width: 46ch;
}
.hero-cta { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 30px; }
.hero-note {
  margin-top: 16px; font-family: var(--mono); font-size: 12px; color: var(--ink-faint);
}

/* the SVG graph card */
.hero-visual {
  background: linear-gradient(180deg, var(--panel), #12171f);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 18px;
  box-shadow: 0 30px 70px -40px #000, 0 0 60px -30px var(--accent-dim);
}
.visual-head {
  display: flex; align-items: baseline; justify-content: space-between;
  padding: 0 4px 14px; border-bottom: 1px solid var(--line-soft); margin-bottom: 14px;
}
.visual-title { font-size: 13px; font-weight: 600; }
.visual-meta { font-family: var(--mono); font-size: 11px; color: var(--ink-faint); }
.hero-visual svg { display: block; width: 100%; height: auto; }
.visual-stats {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px;
  margin-top: 14px; background: var(--line-soft);
  border: 1px solid var(--line-soft); border-radius: 8px; overflow: hidden;
}
.stat { background: var(--panel); padding: 10px 12px; }
.stat-k { font-size: 10px; text-transform: uppercase; letter-spacing: .07em; color: var(--ink-faint); }
.stat-v { font-family: var(--mono); font-size: 17px; font-weight: 500; margin-top: 2px; }
.stat-v.accent { color: var(--accent); }

/* ---------- section frame ---------- */
.section { padding: 80px 0; border-top: 1px solid var(--line-soft); }
.section.alt { background: var(--bg-2); }
.section-head { max-width: 60ch; margin-bottom: 44px; }
.section-kicker {
  font-family: var(--mono); font-size: 11px; letter-spacing: .1em;
  text-transform: uppercase; color: var(--accent); margin-bottom: 12px;
}
.section-head h2 { font-size: clamp(26px, 3.4vw, 36px); font-weight: 700; }
.section-head p { margin-top: 14px; color: var(--ink-dim); font-size: 16px; }

/* ---------- feature grid ---------- */
.grid { display: grid; gap: 18px; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); }
.card {
  background: var(--panel); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 22px;
  transition: border-color .18s, transform .18s;
}
.card:hover { border-color: var(--accent-dim); transform: translateY(-2px); }
.card-icon {
  width: 34px; height: 34px; border-radius: 8px; margin-bottom: 14px;
  display: grid; place-items: center;
  background: rgba(76, 210, 192, .1); border: 1px solid rgba(76, 210, 192, .2);
  color: var(--accent);
}
.card h3 { font-size: 16px; font-weight: 600; margin-bottom: 8px; }
.card p { color: var(--ink-dim); font-size: 14px; }

/* ---------- steps ---------- */
.steps { display: grid; gap: 20px; grid-template-columns: repeat(auto-fit, minmax(230px, 1fr)); counter-reset: step; }
.step { position: relative; padding-top: 42px; }
.step::before {
  counter-increment: step; content: counter(step);
  position: absolute; top: 0; left: 0;
  width: 30px; height: 30px; border-radius: 50%;
  display: grid; place-items: center;
  font-family: var(--mono); font-size: 13px; font-weight: 700;
  color: var(--accent); background: rgba(76, 210, 192, .1);
  border: 1px solid rgba(76, 210, 192, .3);
}
.step h3 { font-size: 15px; font-weight: 600; margin-bottom: 6px; }
.step p { color: var(--ink-dim); font-size: 14px; }

/* ---------- Claude / MCP block ---------- */
.split { display: grid; gap: 44px; align-items: start; }
@media (min-width: 940px) { .split { grid-template-columns: 1fr 1fr; } }

.chat {
  background: var(--panel); border: 1px solid var(--line);
  border-radius: var(--radius-lg); overflow: hidden;
}
.chat-head {
  display: flex; align-items: center; gap: 8px;
  padding: 12px 16px; border-bottom: 1px solid var(--line-soft);
  background: var(--panel-2);
  font-family: var(--mono); font-size: 11px; color: var(--ink-faint);
}
.dot { width: 9px; height: 9px; border-radius: 50%; background: var(--line); }
.dot.live { background: var(--accent); box-shadow: 0 0 8px var(--accent-dim); }
.chat-body { padding: 18px; display: flex; flex-direction: column; gap: 14px; }
.msg { max-width: 88%; padding: 11px 14px; border-radius: 12px; font-size: 14px; }
.msg.user { align-self: flex-end; background: var(--panel-2); border: 1px solid var(--line); }
.msg.bot { align-self: flex-start; background: rgba(76, 210, 192, .07); border: 1px solid rgba(76, 210, 192, .18); }
.msg .tool {
  display: inline-flex; align-items: center; gap: 6px;
  font-family: var(--mono); font-size: 11px; color: var(--accent);
  background: rgba(76, 210, 192, .1); border-radius: 5px; padding: 2px 7px;
  margin-bottom: 8px;
}

.toolchips { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 22px; }
.chip {
  font-family: var(--mono); font-size: 12px;
  padding: 5px 10px; border-radius: 6px;
  background: var(--panel-2); border: 1px solid var(--line); color: var(--ink-dim);
}
.chip.write { border-color: rgba(224, 179, 65, .3); color: var(--warn); }

.callout {
  margin-top: 26px; padding: 16px 18px;
  border-left: 2px solid var(--accent); background: rgba(76, 210, 192, .05);
  border-radius: 0 8px 8px 0; font-size: 14px; color: var(--ink-dim);
}
.callout code {
  font-family: var(--mono); font-size: 13px; color: var(--accent);
  background: rgba(76, 210, 192, .1); padding: 2px 6px; border-radius: 4px;
}

/* ---------- roles table ---------- */
.roles { display: grid; gap: 18px; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); }
.role { background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); padding: 22px; }
.role-tag {
  display: inline-block; font-family: var(--mono); font-size: 10px;
  letter-spacing: .08em; text-transform: uppercase;
  padding: 3px 9px; border-radius: 100px; margin-bottom: 14px;
}
.role-tag.user  { color: var(--accent); background: rgba(76, 210, 192, .1); }
.role-tag.coach { color: var(--violet); background: rgba(106, 123, 216, .12); }
.role-tag.admin { color: var(--warn);   background: rgba(224, 179, 65, .1); }
.role ul { margin: 0; padding-left: 18px; color: var(--ink-dim); font-size: 14px; }
.role li { margin-bottom: 6px; }

/* ---------- final CTA ---------- */
.cta { text-align: center; padding: 90px 0; border-top: 1px solid var(--line-soft); }
.cta h2 { font-size: clamp(26px, 3.6vw, 38px); font-weight: 700; }
.cta p { margin: 16px auto 0; max-width: 52ch; color: var(--ink-dim); font-size: 16px; }
.cta .hero-cta { justify-content: center; }

/* ---------- footer ---------- */
.footer {
  border-top: 1px solid var(--line-soft); padding: 34px 0;
  color: var(--ink-faint); font-size: 13px;
}
.footer-inner { display: flex; flex-wrap: wrap; gap: 16px; align-items: center; justify-content: space-between; }
.footer a:hover { color: var(--ink-dim); }
.footer-links { display: flex; gap: 20px; }

/* =========================================================================
   Auth pages
   ========================================================================= */
.auth-page { min-height: 100vh; display: grid; place-items: center; padding: 40px 24px; }
.auth-card {
  width: 100%; max-width: 420px;
  background: var(--panel); border: 1px solid var(--line);
  border-radius: var(--radius-lg); padding: 32px;
  box-shadow: 0 30px 80px -50px #000;
}
.auth-card .brand { justify-content: center; margin-bottom: 22px; }
.auth-card h1 { font-size: 22px; text-align: center; font-weight: 600; }
.auth-card .sub { text-align: center; color: var(--ink-dim); font-size: 14px; margin-top: 8px; }

.provider-list { display: flex; flex-direction: column; gap: 10px; margin-top: 26px; }
.provider-btn {
  display: flex; align-items: center; gap: 12px;
  padding: 12px 16px; border-radius: 9px;
  border: 1px solid var(--line); background: var(--panel-2); color: var(--ink);
  font-family: var(--sans); font-size: 14px; font-weight: 500; cursor: pointer;
  transition: border-color .15s, background .15s;
}
.provider-btn:hover { border-color: var(--ink-faint); background: #222938; }
.provider-btn svg { flex: none; }
.provider-btn .grow { flex: 1; text-align: left; }
.provider-btn .hint { font-family: var(--mono); font-size: 10px; color: var(--ink-faint); }
/* Intervals.icu is the recommended path — it logs in and links in one step. */
.provider-btn.featured {
  border-color: var(--accent-dim);
  background: linear-gradient(180deg, rgba(76,210,192,.1), rgba(76,210,192,.04));
}
.provider-btn.featured:hover { border-color: var(--accent); }
.provider-btn.featured .hint { color: var(--accent); }

.divider {
  display: flex; align-items: center; gap: 14px;
  margin: 24px 0 20px; color: var(--ink-faint);
  font-family: var(--mono); font-size: 11px; text-transform: uppercase; letter-spacing: .08em;
}
.divider::before, .divider::after { content: ""; flex: 1; height: 1px; background: var(--line-soft); }

.field { margin-bottom: 14px; }
.field label { display: block; font-size: 13px; color: var(--ink-dim); margin-bottom: 6px; }
.field input {
  width: 100%; padding: 11px 13px;
  background: var(--bg); border: 1px solid var(--line); border-radius: 8px;
  color: var(--ink); font-family: var(--sans); font-size: 14px;
}
.field input:focus { outline: none; border-color: var(--accent-dim); background: #0b0f14; }
.field .help { font-size: 12px; color: var(--ink-faint); margin-top: 6px; }

.auth-switch { text-align: center; font-size: 13px; color: var(--ink-dim); margin-top: 20px; }
.auth-switch a { color: var(--accent); }

.alert {
  padding: 11px 14px; border-radius: 8px; font-size: 13px; margin-bottom: 16px;
  border: 1px solid transparent;
}
.alert.error { color: #f0a58c; background: rgba(224, 106, 74, .1); border-color: rgba(224, 106, 74, .3); }
.alert.ok    { color: var(--accent); background: rgba(76, 210, 192, .08); border-color: rgba(76, 210, 192, .25); }
.alert[hidden] { display: none; }

/* =========================================================================
   Account / consent / admin
   ========================================================================= */
.page { max-width: 780px; margin: 0 auto; padding: 48px 24px 80px; }
.page h1 { font-size: 26px; font-weight: 700; margin-bottom: 8px; }
.page > p.lede { color: var(--ink-dim); margin-bottom: 34px; }

.panel {
  background: var(--panel); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 22px; margin-bottom: 20px;
}
.panel h2 { font-size: 16px; font-weight: 600; margin-bottom: 6px; }
.panel .desc { color: var(--ink-dim); font-size: 14px; margin-bottom: 18px; }

.row {
  display: flex; align-items: center; gap: 14px;
  padding: 12px 0; border-top: 1px solid var(--line-soft);
}
.row:first-of-type { border-top: none; }
.row .grow { flex: 1; min-width: 0; }
.row .name { font-size: 14px; font-weight: 500; }
.row .meta { font-family: var(--mono); font-size: 11px; color: var(--ink-faint); }

.pill {
  font-family: var(--mono); font-size: 10px; text-transform: uppercase; letter-spacing: .06em;
  padding: 3px 8px; border-radius: 100px;
  background: var(--panel-2); border: 1px solid var(--line); color: var(--ink-dim);
}
.pill.on { color: var(--accent); border-color: rgba(76,210,192,.3); background: rgba(76,210,192,.08); }
.pill.warn { color: var(--warn); border-color: rgba(224,179,65,.3); background: rgba(224,179,65,.08); }

.codebox {
  display: flex; align-items: center; gap: 10px;
  background: var(--bg); border: 1px solid var(--line); border-radius: 8px;
  padding: 10px 12px; margin: 14px 0;
}
.codebox code {
  flex: 1; font-family: var(--mono); font-size: 13px; color: var(--accent);
  overflow-x: auto; white-space: nowrap;
}

table.data { width: 100%; border-collapse: collapse; font-size: 14px; }
table.data th, table.data td { text-align: left; padding: 10px 8px; border-bottom: 1px solid var(--line-soft); }
table.data th { font-size: 11px; text-transform: uppercase; letter-spacing: .06em; color: var(--ink-faint); font-weight: 500; }
table.data td.mono { font-family: var(--mono); font-size: 12px; color: var(--ink-dim); }
table.data select {
  background: var(--bg); border: 1px solid var(--line); border-radius: 6px;
  color: var(--ink); font-family: var(--sans); font-size: 13px; padding: 5px 8px;
}

/* ---------- prose links ----------
   The global rule strips link styling so nav and cards stay clean; inside
   running text a link has to be visible again. */
.page a:not(.btn), .panel .desc a, .auth-card .sub a, .footer-inner a:hover {
  color: var(--accent); text-decoration: underline; text-underline-offset: 2px;
}
.page a:not(.btn):hover, .panel .desc a:hover { color: #5fe0ce; }

/* ---------- collapsible fallback (API-key linking) ---------- */
.fallback { margin-top: 18px; border-top: 1px solid var(--line-soft); padding-top: 16px; }
.fallback[hidden] { display: none; }
.fallback > summary {
  cursor: pointer; list-style: none; font-size: 13px; color: var(--ink-dim);
  display: flex; align-items: center; gap: 8px; user-select: none;
}
.fallback > summary::-webkit-details-marker { display: none; }
.fallback > summary::before {
  content: ""; width: 6px; height: 6px; flex: none;
  border-right: 1.5px solid currentColor; border-bottom: 1.5px solid currentColor;
  transform: rotate(-45deg); transition: transform .15s ease;
}
.fallback[open] > summary::before { transform: rotate(45deg); }
.fallback > summary:hover { color: var(--ink); }
.fallback > summary:focus-visible { outline: 2px solid var(--accent-dim); outline-offset: 3px; border-radius: 4px; }

@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; transition: none !important; }
  html { scroll-behavior: auto; }
}