/* ChartBook website: the app's own palette (purple and black) */
:root {
  --bg: #0b0a10;
  --panel: #15131f;
  --border: #26215c;
  --purple: #7f77dd;
  --purple-strong: #534ab7;
  --book: #9d96ea;
  --text: #eceaf6;
  --muted: #9b97b8;
  --green: #5dcaa5;
  --red: #e5484d;
  color-scheme: dark;
}

* {
  box-sizing: border-box;
}

[hidden] {
  display: none !important;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font:
    17px/1.55 'Inter',
    'Segoe UI',
    system-ui,
    sans-serif;
}

a {
  color: var(--book);
}

img,
video {
  max-width: 100%;
  display: block;
}

.wrap {
  width: min(1120px, 100% - 32px);
  margin: 0 auto;
}

/* Top bar */
.top {
  position: sticky;
  top: 0;
  z-index: 5;
  background: rgba(11, 10, 16, 0.86);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}

.top .wrap {
  display: flex;
  align-items: center;
  gap: 18px;
  height: 60px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 20px;
  letter-spacing: -0.02em;
  color: var(--text);
  text-decoration: none;
}

.brand img {
  width: 28px;
  height: 28px;
}

.brand span {
  color: var(--book);
}

.top nav {
  margin-left: auto;
  display: flex;
  gap: 20px;
  align-items: center;
}

.top nav a {
  color: var(--muted);
  text-decoration: none;
  font-size: 15px;
}

.top nav a:hover {
  color: var(--text);
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 22px;
  border-radius: 12px;
  background: var(--purple-strong);
  color: #fff !important;
  font-weight: 600;
  text-decoration: none;
  border: 1px solid var(--purple);
  transition: background 0.15s;
}

.btn:hover {
  background: var(--purple);
}

.btn.small {
  padding: 7px 14px;
  font-size: 14px;
  border-radius: 10px;
}

.btn.ghost {
  background: transparent;
}

/* Hero */
.hero {
  padding: 84px 0 40px;
  text-align: center;
  background:
    radial-gradient(900px 500px at 70% 0%, rgba(83, 74, 183, 0.3), transparent 70%),
    radial-gradient(700px 400px at 10% 30%, rgba(127, 119, 221, 0.12), transparent 70%);
}

.hero h1 {
  font-size: clamp(36px, 6vw, 64px);
  line-height: 1.05;
  letter-spacing: -0.03em;
  margin: 0 auto 18px;
  max-width: 820px;
}

.hero h1 em {
  font-style: normal;
  color: var(--book);
}

.hero p.lead {
  color: var(--muted);
  font-size: clamp(18px, 2.2vw, 21px);
  max-width: 680px;
  margin: 0 auto 30px;
}

.hero .ctas {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
}

.hero .note {
  margin-top: 14px;
  color: var(--muted);
  font-size: 14px;
}

.video {
  margin: 48px auto 0;
  border-radius: 18px;
  overflow: hidden;
  border: 1px solid var(--border);
  box-shadow: 0 40px 120px rgba(0, 0, 0, 0.55);
}

/* Sections */
section {
  padding: 72px 0;
}

.kicker {
  color: var(--purple);
  font-weight: 700;
  font-size: 13px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin-bottom: 10px;
}

h2 {
  font-size: clamp(28px, 4vw, 42px);
  letter-spacing: -0.02em;
  line-height: 1.1;
  margin: 0 0 14px;
}

.sub {
  color: var(--muted);
  max-width: 640px;
  margin: 0 0 36px;
}

.center {
  text-align: center;
}

.center .sub {
  margin-left: auto;
  margin-right: auto;
}

/* A step of the day: copy next to a shot of the panel */
.step {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
  margin-bottom: 64px;
}

.step:nth-child(even) .shot {
  order: -1;
}

.step h3 {
  font-size: 28px;
  margin: 0 0 10px;
  letter-spacing: -0.01em;
}

.step p {
  color: var(--muted);
  margin: 0;
}

.shot {
  border-radius: 14px;
  overflow: hidden;
  border: 1px solid var(--border);
  background: var(--panel);
  box-shadow: 0 24px 80px rgba(0, 0, 0, 0.5);
}

.shot.narrow {
  max-width: 420px;
  justify-self: center;
}

/* Results: a gallery of the journal window */
.results {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.results figure {
  margin: 0;
}

.results figcaption {
  margin-top: 10px;
  color: var(--muted);
  font-size: 15px;
}

.results figcaption b {
  color: var(--text);
}

/* Feature tiles */
.tiles {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}

.tile {
  padding: 24px;
  border-radius: 16px;
  background: var(--panel);
  border: 1px solid var(--border);
}

.tile .icon {
  font-size: 28px;
}

.tile h3 {
  margin: 8px 0 6px;
  font-size: 19px;
}

.tile p {
  margin: 0;
  color: var(--muted);
  font-size: 15px;
}

/* Comparison */
.compare {
  max-width: 860px;
  margin: 0 auto;
  display: grid;
  gap: 10px;
}

.compare .row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  padding: 16px 22px;
  border-radius: 14px;
  background: var(--panel);
  border: 1px solid var(--border);
}

.compare .head {
  background: none;
  border: none;
  padding: 0 22px;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--muted);
}

.compare .head span:last-child {
  color: var(--purple);
}

.compare .them {
  color: var(--muted);
}

.compare .us::before {
  content: '✓ ';
  color: var(--green);
}

/* Download */
.download {
  text-align: center;
  padding: 64px 24px;
  border-radius: 24px;
  border: 1px solid var(--border);
  background:
    radial-gradient(600px 300px at 50% 0%, rgba(83, 74, 183, 0.35), transparent 70%),
    var(--panel);
}

.download p {
  color: var(--muted);
  max-width: 560px;
  margin: 0 auto 26px;
}

.download .fine {
  margin-top: 18px;
  font-size: 14px;
}

/* Footer */
footer {
  border-top: 1px solid var(--border);
  padding: 28px 0 40px;
  color: var(--muted);
  font-size: 14px;
}

footer .wrap {
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
  align-items: center;
}

footer .spacer {
  flex: 1;
}

/* Text pages (privacy) */
.page {
  max-width: 760px;
  padding: 56px 0;
}

.page h1 {
  font-size: 40px;
  letter-spacing: -0.02em;
}

.page h2 {
  font-size: 24px;
  margin-top: 36px;
}

.page p,
.page li {
  color: #cfcbe6;
}

@media (max-width: 820px) {
  .step,
  .results {
    grid-template-columns: 1fr;
  }

  .step:nth-child(even) .shot {
    order: 0;
  }

  .tiles {
    grid-template-columns: 1fr;
  }

  .compare .row {
    grid-template-columns: 1fr;
    gap: 4px;
  }

  .compare .head {
    display: none;
  }

  .top nav a:not(.btn) {
    display: none;
  }

  section {
    padding: 52px 0;
  }
}

/* The strip is a long thin bar: its step runs full width, copy above */
.step.wide {
  grid-template-columns: 1fr;
  gap: 24px;
}

.step.wide p {
  max-width: 760px;
}

.step.wide .shot {
  order: 0;
}

/* Beta waitlist form */
.join {
  display: grid;
  gap: 16px;
  max-width: 620px;
  margin: 0 auto;
  text-align: left;
}

.join-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.join label {
  display: grid;
  gap: 6px;
  font-size: 15px;
  color: var(--muted);
}

.join input:not([type='radio']):not([type='checkbox']),
.join textarea {
  width: 100%;
  padding: 11px 13px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--text);
  font: inherit;
}

.join input:focus-visible,
.join textarea:focus-visible {
  outline: 2px solid var(--purple);
  outline-offset: 1px;
}

.join fieldset {
  border: 0;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.join legend {
  width: 100%;
  margin-bottom: 8px;
  color: var(--muted);
  font-size: 15px;
}

.join .chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 7px 12px;
  border-radius: 999px;
  border: 1px solid var(--border);
  color: var(--text);
  cursor: pointer;
}

.join .chip:has(input:checked) {
  border-color: var(--purple);
  background: rgba(83, 74, 183, 0.3);
}

.join .chip input {
  accent-color: var(--purple);
  margin: 0;
}

.join .consent {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 14px;
}

.join .consent input {
  margin-top: 4px;
  accent-color: var(--purple);
}

.join .btn {
  justify-self: start;
  font: inherit;
  font-weight: 600;
  cursor: pointer;
}

.join .btn:disabled {
  opacity: 0.6;
  cursor: default;
}

.join .hp {
  position: absolute;
  left: -10000px;
  width: 1px;
  height: 1px;
  overflow: hidden;
}

.download .join-msg {
  margin: 0;
  min-height: 1.5em;
  font-size: 15px;
}

.download .join-msg.ok {
  color: var(--green);
}

.download .join-msg.error {
  color: var(--red);
}

@media (max-width: 620px) {
  .join-row {
    grid-template-columns: 1fr;
  }

  .download {
    padding: 40px 16px;
  }
}

/* Beta admin (admin.html) */
.admin .muted {
  color: var(--muted);
}

.admin .small {
  font-size: 14px;
}

.admin-sign-in {
  margin: 0;
}

.admin-tabs {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 18px;
}

.admin-tabs button {
  padding: 8px 14px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--muted);
  font: inherit;
  cursor: pointer;
}

.admin-tabs button.on {
  border-color: var(--purple);
  color: var(--text);
  background: rgba(83, 74, 183, 0.3);
}

.admin-tabs span {
  margin-left: 4px;
  opacity: 0.8;
}

.admin-people {
  display: grid;
  gap: 12px;
}

.admin-person {
  display: grid;
  gap: 6px;
  padding: 16px;
  border-radius: 14px;
  border: 1px solid var(--border);
  background: var(--panel);
}

.admin-head {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  align-items: baseline;
  overflow-wrap: anywhere;
}

.admin-note {
  margin: 4px 0 0;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
}

.admin-actions {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-top: 6px;
}

.admin-actions .btn {
  font: inherit;
  font-size: 14px;
  cursor: pointer;
}

.join-msg.ok {
  color: var(--green);
}

.join-msg.error {
  color: var(--red);
}