/* Bookalyze landing page. Colours match the app (docs/BRAND.md). */
:root {
  --bg: #fbfcfd;
  --bg-tint: #f4f4f9;
  --card: #ffffff;
  --ink: #14151f;
  --muted: #696b78;
  --border: #e6e6ea;
  --primary: #4c55ca;
  --primary-ink: #ffffff;
  --primary-soft: #eceffe;
  --grad-a: #606cdd;
  --grad-b: #373ba7;
  --success: #02985f;
  --radius: 18px;
  --shadow: 0 1px 2px rgb(20 21 31 / 0.04), 0 8px 24px -12px rgb(20 21 31 / 0.12);
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0e0f15;
    --bg-tint: #121319;
    --card: #16171e;
    --ink: #f1f1f5;
    --muted: #9c9ea8;
    --border: #2a2b32;
    --primary: #7e8ef4;
    --primary-ink: #0e0f15;
    --primary-soft: #23264a;
    --grad-a: #7e8ef4;
    --grad-b: #606cdd;
    --shadow: 0 1px 2px rgb(0 0 0 / 0.3), 0 12px 32px -12px rgb(0 0 0 / 0.5);
    color-scheme: dark;
  }
}

* {
  box-sizing: border-box;
}
html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}
body {
  margin: 0;
  font-family: "Geist", ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--ink);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
img {
  max-width: 100%;
  display: block;
}
a {
  color: inherit;
}
h1,
h2,
h3 {
  line-height: 1.15;
  letter-spacing: -0.025em;
  margin: 0;
  text-wrap: balance;
}
p {
  margin: 0;
}
.container {
  width: min(1160px, 100% - 40px);
  margin-inline: auto;
}
.narrow {
  width: min(780px, 100% - 40px);
}
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}
.skip {
  position: absolute;
  left: -999px;
  top: 8px;
  background: var(--card);
  padding: 8px 12px;
  border-radius: 8px;
  z-index: 100;
}
.skip:focus {
  left: 8px;
}

.logo-dark {
  display: none;
}
@media (prefers-color-scheme: dark) {
  .logo-light {
    display: none;
  }
  .logo-dark {
    display: block;
  }
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  height: 48px;
  padding: 0 22px;
  border-radius: 12px;
  border: 0;
  cursor: pointer;
  font: 600 15px / 1 inherit;
  font-family: inherit;
  text-decoration: none;
  white-space: nowrap;
  transition:
    transform 0.15s ease,
    box-shadow 0.2s ease,
    background-color 0.2s ease;
}
.btn:active {
  transform: scale(0.98);
}
.btn:focus-visible,
input:focus-visible,
summary:focus-visible,
.nav-links a:focus-visible {
  outline: 3px solid color-mix(in srgb, var(--primary) 40%, transparent);
  outline-offset: 2px;
}
.btn-primary {
  background: var(--primary);
  color: var(--primary-ink);
  box-shadow:
    0 1px 2px rgb(0 0 0 / 0.1),
    inset 0 1px 0 rgb(255 255 255 / 0.15);
}
.btn-primary:hover {
  box-shadow: 0 10px 24px -8px color-mix(in srgb, var(--primary) 60%, transparent);
}
.btn-light {
  background: #fff;
  color: #2b2d89;
}
.btn-light:hover {
  box-shadow: 0 10px 24px -8px rgb(0 0 0 / 0.35);
}
.btn-sm {
  height: 40px;
  padding: 0 16px;
  font-size: 14px;
  border-radius: 10px;
}

/* Nav */
.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  background: color-mix(in srgb, var(--bg) 82%, transparent);
  backdrop-filter: saturate(1.6) blur(14px);
  -webkit-backdrop-filter: saturate(1.6) blur(14px);
  border-bottom: 1px solid transparent;
  transition: border-color 0.2s ease;
}
.nav.scrolled {
  border-bottom-color: var(--border);
}
.nav-inner {
  display: flex;
  align-items: center;
  gap: 24px;
  height: 68px;
}
.brand img {
  height: 28px;
  width: auto;
}
.nav-links {
  display: flex;
  gap: 28px;
  margin-left: auto;
  font-size: 15px;
  color: var(--muted);
}
.nav-links a {
  text-decoration: none;
  transition: color 0.15s;
  border-radius: 6px;
}
.nav-links a:hover {
  color: var(--ink);
}
@media (max-width: 820px) {
  .nav-links {
    display: none;
  }
  .nav .btn {
    margin-left: auto;
  }
}

/* Hero */
.hero {
  position: relative;
  overflow: hidden;
  padding: 72px 0 40px;
  text-align: center;
}
.hero-glow {
  position: absolute;
  inset: -20% -10% auto;
  height: 720px;
  pointer-events: none;
  background:
    radial-gradient(
      40% 50% at 30% 30%,
      color-mix(in srgb, var(--grad-a) 22%, transparent),
      transparent 70%
    ),
    radial-gradient(
      35% 45% at 72% 20%,
      color-mix(in srgb, #955be3 18%, transparent),
      transparent 70%
    );
}
.hero-inner {
  position: relative;
}
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  border-radius: 999px;
  background: var(--card);
  border: 1px solid var(--border);
  font-size: 13.5px;
  font-weight: 500;
  color: var(--muted);
  box-shadow: var(--shadow);
}
.dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--success);
  box-shadow: 0 0 0 4px color-mix(in srgb, var(--success) 20%, transparent);
}
.hero h1 {
  margin: 22px auto 0;
  max-width: 900px;
  font-size: clamp(36px, 6vw, 64px);
  font-weight: 700;
}
.grad {
  background: linear-gradient(120deg, var(--grad-a), var(--grad-b) 70%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.lead {
  margin: 22px auto 0;
  max-width: 680px;
  font-size: clamp(17px, 2vw, 19px);
  color: var(--muted);
}

/* Waitlist form */
.waitlist {
  margin: 32px auto 0;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px;
  max-width: 520px;
}
.waitlist input {
  flex: 1 1 260px;
  height: 48px;
  padding: 0 16px;
  border-radius: 12px;
  font: inherit;
  font-size: 15px;
  border: 1px solid var(--border);
  background: var(--card);
  color: var(--ink);
  box-shadow: var(--shadow);
  transition:
    border-color 0.15s,
    box-shadow 0.15s;
}
.waitlist input::placeholder {
  color: color-mix(in srgb, var(--muted) 80%, transparent);
}
.waitlist input:focus {
  border-color: var(--primary);
  outline: none;
  box-shadow: 0 0 0 4px color-mix(in srgb, var(--primary) 18%, transparent);
}
.form-note {
  flex-basis: 100%;
  font-size: 13.5px;
  color: var(--muted);
}
.form-note.ok {
  color: var(--success);
  font-weight: 500;
}
.form-note.err {
  color: #db2b33;
}
.waitlist.done input,
.waitlist.done button {
  display: none;
}

/* Product preview */
.preview {
  margin: 64px auto 0;
  max-width: 1020px;
  text-align: left;
  border-radius: 22px;
  overflow: hidden;
  background: var(--card);
  border: 1px solid var(--border);
  box-shadow:
    0 40px 80px -30px rgb(40 40 120 / 0.35),
    var(--shadow);
}
.preview-bar {
  display: flex;
  align-items: center;
  gap: 7px;
  padding: 12px 16px;
  border-bottom: 1px solid var(--border);
  background: var(--bg-tint);
}
.preview-bar span {
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--border);
}
.preview-bar em {
  margin: 0 auto;
  font-style: normal;
  font-size: 12.5px;
  color: var(--muted);
  background: var(--card);
  padding: 3px 14px;
  border-radius: 8px;
  border: 1px solid var(--border);
}
.preview-body {
  display: grid;
  grid-template-columns: 210px 1fr;
  min-height: 340px;
}
.preview-side {
  border-right: 1px solid var(--border);
  background: var(--bg-tint);
  padding: 16px 12px;
  display: flex;
  flex-direction: column;
  gap: 4px;
  font-size: 13.5px;
  color: var(--muted);
}
.preview-side i {
  font-style: normal;
  padding: 7px 10px;
  border-radius: 8px;
}
.preview-side i.active {
  background: var(--card);
  color: var(--ink);
  font-weight: 600;
  box-shadow: var(--shadow);
}
.pv-org {
  display: flex;
  gap: 10px;
  align-items: center;
  padding: 8px;
  margin-bottom: 10px;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--card);
}
.pv-org b {
  width: 30px;
  height: 30px;
  border-radius: 8px;
  display: grid;
  place-items: center;
  font-size: 11px;
  background: var(--primary-soft);
  color: var(--primary);
}
.pv-org strong {
  display: block;
  font-size: 13px;
  color: var(--ink);
  line-height: 1.2;
}
.pv-org small {
  font-size: 11.5px;
}
.preview-main {
  padding: 22px 24px;
}
.pv-hello {
  font-size: 13px;
  color: var(--muted);
  font-weight: 500;
}
.pv-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin-top: 12px;
}
.pv-cards div {
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 14px;
}
.pv-cards small {
  display: block;
  font-size: 12px;
  color: var(--muted);
}
.pv-cards strong {
  display: block;
  font-size: 22px;
  letter-spacing: -0.02em;
  margin: 4px 0 2px;
  font-variant-numeric: tabular-nums;
}
.pv-cards span {
  font-size: 12px;
  color: var(--muted);
}
.pv-cards .up,
.pv-cards .ok {
  color: var(--success);
  font-weight: 500;
}
.pv-chart {
  margin-top: 12px;
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 14px;
}
.pv-chart small {
  font-size: 12px;
  color: var(--muted);
}
.bars {
  display: flex;
  align-items: flex-end;
  gap: 8px;
  height: 120px;
  margin-top: 10px;
}
.bars i {
  flex: 1;
  height: var(--h);
  border-radius: 6px 6px 2px 2px;
  background: linear-gradient(
    to top,
    color-mix(in srgb, var(--grad-a) 35%, transparent),
    var(--grad-a)
  );
  transform-origin: bottom;
}
.preview.in .bars i {
  animation: grow 0.8s cubic-bezier(0.2, 0.8, 0.2, 1) both;
}
.preview.in .bars i:nth-child(n) {
  animation-delay: calc(var(--i, 0) * 50ms + 200ms);
}
@keyframes grow {
  from {
    transform: scaleY(0);
  }
  to {
    transform: scaleY(1);
  }
}
@media (max-width: 760px) {
  .preview-body {
    grid-template-columns: 1fr;
  }
  .preview-side {
    display: none;
  }
  .pv-cards {
    grid-template-columns: 1fr 1fr;
  }
  .pv-cards div:last-child {
    grid-column: span 2;
  }
}

/* Sections */
.section {
  padding: 96px 0;
}
.section-tint {
  background: var(--bg-tint);
  border-block: 1px solid var(--border);
}
.section-head {
  max-width: 680px;
  margin: 0 auto 48px;
  text-align: center;
}
.kicker {
  font-size: 14px;
  font-weight: 600;
  color: var(--primary);
  margin-bottom: 10px;
}
.section h2 {
  font-size: clamp(28px, 4vw, 42px);
  font-weight: 700;
}
.section-head p:not(.kicker) {
  margin-top: 14px;
  color: var(--muted);
  font-size: 17px;
}
.body-lg {
  margin-top: 16px;
  font-size: 17px;
  color: var(--muted);
}

.grid {
  display: grid;
  gap: 18px;
}
.features {
  grid-template-columns: repeat(3, 1fr);
}
@media (max-width: 960px) {
  .features {
    grid-template-columns: repeat(2, 1fr);
  }
}
@media (max-width: 620px) {
  .features {
    grid-template-columns: 1fr;
  }
  .section {
    padding: 72px 0;
  }
}
.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 26px;
  box-shadow: var(--shadow);
  transition:
    transform 0.25s ease,
    box-shadow 0.25s ease,
    border-color 0.25s ease;
}
.card:hover {
  transform: translateY(-3px);
  border-color: color-mix(in srgb, var(--primary) 30%, var(--border));
  box-shadow: 0 18px 40px -18px color-mix(in srgb, var(--primary) 35%, transparent);
}
.card h3 {
  font-size: 18px;
  margin-top: 16px;
}
.card p {
  margin-top: 8px;
  color: var(--muted);
  font-size: 15px;
}
.icon {
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: var(--primary-soft);
  color: var(--primary);
}
.icon svg {
  width: 22px;
  height: 22px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.8;
  stroke-linecap: round;
  stroke-linejoin: round;
}

/* Split section */
.split {
  display: grid;
  grid-template-columns: 1.05fr 1fr;
  gap: 56px;
  align-items: center;
}
@media (max-width: 900px) {
  .split {
    grid-template-columns: 1fr;
    gap: 40px;
  }
}
.checks {
  list-style: none;
  padding: 0;
  margin: 24px 0 0;
  display: grid;
  gap: 12px;
}
.checks li {
  position: relative;
  padding-left: 32px;
  font-size: 15.5px;
}
.checks li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 2px;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background:
    var(--primary-soft)
    url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%234C55CA' stroke-width='3' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='m5 12 5 5L20 7'/%3E%3C/svg%3E")
    center / 12px no-repeat;
}
.stack {
  display: grid;
  gap: 12px;
}
.co {
  display: flex;
  align-items: center;
  gap: 14px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 14px 16px;
  box-shadow: var(--shadow);
}
.co:nth-child(2) {
  margin-left: 28px;
}
.co:nth-child(3) {
  margin-left: 56px;
}
@media (max-width: 520px) {
  .co:nth-child(2),
  .co:nth-child(3) {
    margin-left: 0;
  }
}
.co b {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  display: grid;
  place-items: center;
  background: var(--c);
  color: var(--t);
  font-size: 13px;
}
.co div {
  flex: 1;
  min-width: 0;
}
.co strong {
  display: block;
  font-size: 15px;
}
.co small {
  color: var(--muted);
  font-size: 13px;
}
.pill {
  font-size: 12px;
  padding: 3px 10px;
  border-radius: 999px;
  background: var(--primary-soft);
  color: var(--primary);
  font-weight: 500;
}
.channels {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 8px;
}
.channels span {
  font-size: 13px;
  padding: 6px 12px;
  border-radius: 999px;
  border: 1px dashed var(--border);
  color: var(--muted);
  background: var(--card);
}

/* Steps */
.steps {
  grid-template-columns: repeat(3, 1fr);
  list-style: none;
  padding: 0;
  margin: 0;
  counter-reset: s;
}
@media (max-width: 860px) {
  .steps {
    grid-template-columns: 1fr;
  }
}
.num {
  display: grid;
  place-items: center;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--grad-a), var(--grad-b));
  color: #fff;
  font-weight: 700;
  font-size: 15px;
}

/* FAQ */
.faq {
  display: grid;
  gap: 10px;
}
.faq details {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 0 20px;
  box-shadow: var(--shadow);
}
.faq summary {
  cursor: pointer;
  list-style: none;
  padding: 18px 0;
  font-weight: 600;
  display: flex;
  justify-content: space-between;
  gap: 16px;
  border-radius: 8px;
}
.faq summary::-webkit-details-marker {
  display: none;
}
.faq summary::after {
  content: "+";
  font-size: 22px;
  line-height: 1;
  color: var(--muted);
  transition: transform 0.2s ease;
}
.faq details[open] summary::after {
  transform: rotate(45deg);
}
.faq details p {
  padding: 0 0 18px;
  color: var(--muted);
}

/* Final CTA */
.cta-wrap {
  padding-top: 24px;
}
.cta {
  position: relative;
  overflow: hidden;
  text-align: center;
  color: #fff;
  border-radius: 28px;
  padding: 64px 24px;
  background:
    radial-gradient(60% 80% at 85% 0%, rgb(149 91 227 / 0.55), transparent 60%),
    radial-gradient(50% 80% at 10% 100%, rgb(0 121 206 / 0.45), transparent 60%), #2b2d89;
}
.cta img {
  margin: 0 auto 22px;
  height: 40px;
  width: auto;
  opacity: 0.95;
}
.cta h2 {
  color: #fff;
}
.cta > p {
  margin-top: 10px;
  color: rgb(255 255 255 / 0.75);
  font-size: 17px;
}
.waitlist-inverse input {
  background: rgb(255 255 255 / 0.1);
  border-color: rgb(255 255 255 / 0.25);
  color: #fff;
  box-shadow: none;
}
.waitlist-inverse input::placeholder {
  color: rgb(255 255 255 / 0.6);
}
.waitlist-inverse input:focus {
  border-color: #fff;
  box-shadow: 0 0 0 4px rgb(255 255 255 / 0.2);
}
.waitlist-inverse .form-note {
  color: rgb(255 255 255 / 0.7);
}
.waitlist-inverse .form-note.ok {
  color: #9ff0c9;
}

/* Footer */
.footer {
  padding: 48px 0 56px;
}
.footer-inner {
  display: grid;
  gap: 10px;
  justify-items: center;
  text-align: center;
  color: var(--muted);
  font-size: 14px;
}
.footer-inner img {
  height: 24px;
  width: auto;
  margin-bottom: 6px;
}
.copy {
  font-size: 12.5px;
}

/* Scroll reveal (only when JS runs; respects reduced motion) */
.js .reveal {
  opacity: 0;
  transform: translateY(14px);
  transition:
    opacity 0.7s ease,
    transform 0.7s cubic-bezier(0.2, 0.8, 0.2, 1);
}
.js .reveal.in {
  opacity: 1;
  transform: none;
}
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  .js .reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }
  .preview.in .bars i,
  .card {
    animation: none;
    transition: none;
  }
}

/* Honeypot field for spam bots (hidden from people and screen readers) */
.waitlist .hp {
  position: absolute;
  left: -10000px;
  flex: none;
  width: 1px;
  height: 1px;
  padding: 0;
  border: 0;
  opacity: 0;
}