/* ChartBook website, "Precision": near-black, hairline borders, Inter for words, a monospace for
   numbers and labels, purple only where it matters. Fonts are served from this site (no Google). */
@font-face {
  font-family: 'Inter';
  src: url('assets/fonts/Inter.woff2') format('woff2');
  font-weight: 400 800;
  font-display: swap;
}

@font-face {
  font-family: 'JetBrains Mono';
  src: url('assets/fonts/JetBrainsMono.woff2') format('woff2');
  font-weight: 400 700;
  font-display: swap;
}

:root {
  --bg: #09090c;
  --panel: #111116;
  --panel-2: #17171e;
  --border: #23232c;
  --border-strong: #2f2f3a;
  --purple: #7f77dd;
  --purple-strong: #534ab7;
  --book: #9d96ea;
  --text: #ededf2;
  --muted: #8b8b98;
  --green: #3ecf8e;
  --red: #f26d6d;
  --mono: 'JetBrains Mono', 'Cascadia Mono', Consolas, monospace;
  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:
    16px/1.6 'Inter',
    'Segoe UI',
    system-ui,
    sans-serif;
  font-feature-settings: 'cv11', 'ss01';
  -webkit-font-smoothing: antialiased;
}

:focus-visible {
  outline: 2px solid var(--purple);
  outline-offset: 2px;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
}

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(9, 9, 12, 0.8);
  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: 11px 18px;
  border-radius: 8px;
  background: var(--text);
  color: #09090c !important;
  font-weight: 600;
  font-size: 15px;
  text-decoration: none;
  border: 1px solid var(--text);
  transition:
    background 0.15s ease,
    border-color 0.15s ease;
}

.btn:hover {
  background: #fff;
}

.btn.small {
  padding: 7px 13px;
  font-size: 14px;
}

.btn.ghost {
  background: transparent;
  color: var(--text) !important;
  border-color: var(--border-strong);
}

.btn.ghost:hover {
  border-color: var(--muted);
  background: var(--panel);
}

.btn svg {
  width: 16px;
  height: 16px;
}

/* Hero */
.hero {
  padding: 96px 0 40px;
  text-align: center;
  background: radial-gradient(900px 360px at 50% -10%, rgba(127, 119, 221, 0.16), transparent 70%);
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 22px;
  padding: 6px 12px;
  border: 1px solid var(--border);
  border-radius: 999px;
  font: 500 12px/1 var(--mono);
  color: var(--book);
}

.eyebrow i {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--green);
}

.hero h1 {
  font-size: clamp(38px, 6.4vw, 68px);
  font-weight: 700;
  line-height: 1.02;
  letter-spacing: -0.045em;
  margin: 0 auto 20px;
  max-width: 880px;
  text-wrap: balance;
}

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

.hero p.lead {
  color: var(--muted);
  font-size: clamp(17px, 2vw, 19px);
  max-width: 620px;
  margin: 0 auto 30px;
  text-wrap: pretty;
}

.hero .ctas {
  display: flex;
  gap: 10px;
  justify-content: center;
  flex-wrap: wrap;
}

.hero .note {
  margin-top: 16px;
  color: var(--muted);
  font: 400 12.5px/1.5 var(--mono);
}

.video {
  margin: 56px auto 0;
  border-radius: 12px;
  overflow: hidden;
  border: 1px solid var(--border-strong);
  box-shadow:
    0 0 0 6px rgba(255, 255, 255, 0.02),
    0 40px 120px rgba(0, 0, 0, 0.6);
}

/* Sections */
section {
  padding: 88px 0;
  border-top: 1px solid var(--border);
}

.kicker {
  color: var(--book);
  font: 500 12px/1 var(--mono);
  letter-spacing: 0.04em;
  margin-bottom: 14px;
}

.kicker::before {
  content: '// ';
  color: var(--muted);
}

h2 {
  font-size: clamp(28px, 4vw, 44px);
  font-weight: 700;
  letter-spacing: -0.035em;
  line-height: 1.08;
  margin: 0 0 14px;
  text-wrap: balance;
}

.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: 26px;
  font-weight: 650;
  margin: 0 0 10px;
  letter-spacing: -0.03em;
}

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

.shot {
  border-radius: 10px;
  overflow: hidden;
  border: 1px solid var(--border-strong);
  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: 22px;
  border-radius: 10px;
  background: var(--panel);
  border: 1px solid var(--border);
  transition: border-color 0.15s ease;
}

.tile:hover {
  border-color: var(--border-strong);
}

.tile .icon {
  width: 34px;
  height: 34px;
  display: grid;
  place-items: center;
  border-radius: 8px;
  border: 1px solid var(--border-strong);
  color: var(--book);
}

.tile .icon svg {
  width: 18px;
  height: 18px;
}

.tile h3 {
  margin: 14px 0 6px;
  font-size: 17px;
  font-weight: 650;
  letter-spacing: -0.02em;
}

.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: 15px 22px;
  border-radius: 10px;
  background: var(--panel);
  border: 1px solid var(--border);
}

.compare .head {
  background: none;
  border: none;
  padding: 0 22px;
  font: 500 12px/1 var(--mono);
  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: 14px;
  border: 1px solid var(--border);
  background:
    radial-gradient(600px 260px at 50% 0%, rgba(127, 119, 221, 0.14), 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: 8px;
  border: 1px solid var(--border-strong);
  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: 8px;
  border: 1px solid var(--border-strong);
  color: var(--text);
  cursor: pointer;
}

.join .chip:has(input:checked) {
  border-color: var(--purple);
  background: rgba(127, 119, 221, 0.12);
}

.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);
}

/* Download page (download.html): where approved testers land from the welcome email */
.dl-page {
  max-width: 720px;
  padding: 88px 0 72px;
  text-align: center;
}

.dl-page h1 {
  margin: 0 0 12px;
  font-size: clamp(36px, 6vw, 56px);
  font-weight: 700;
  letter-spacing: -0.045em;
  line-height: 1.04;
}

.dl-page .lead {
  margin: 0 auto 32px;
  color: var(--muted);
  font-size: 18px;
}

.dl-btn {
  padding: 14px 26px;
  font-size: 16px;
}

.dl-btn svg {
  width: 18px;
  height: 18px;
}

.dl-meta {
  margin: 14px 0 0;
  color: var(--muted);
  font: 400 12.5px/1.5 var(--mono);
}

.dl-steps {
  margin: 56px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 12px;
  text-align: left;
}

.dl-steps li {
  display: flex;
  gap: 16px;
  padding: 20px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--panel);
}

.dl-steps .n {
  flex: none;
  width: 28px;
  height: 28px;
  display: grid;
  place-items: center;
  border-radius: 7px;
  border: 1px solid var(--border-strong);
  color: var(--book);
  font: 500 13px/1 var(--mono);
}

.dl-steps h3,
.dl-help h3 {
  margin: 2px 0 4px;
  font-size: 16px;
  font-weight: 650;
  letter-spacing: -0.02em;
}

.dl-steps p,
.dl-help p {
  margin: 0;
  color: var(--muted);
  font-size: 15px;
}

.dl-steps code {
  font: 500 13px var(--mono);
  color: var(--text);
}

.dl-steps b {
  color: var(--text);
}

.dl-help {
  margin-top: 32px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  text-align: left;
  padding-top: 28px;
  border-top: 1px solid var(--border);
}

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

  .dl-page {
    padding-top: 56px;
  }
}