/* kids-shelf site. Colors come from the app icon: cream, shelf wood and the
   four book spines. No web fonts and nothing loaded from other sites. */
:root {
  --cream: #fff3d6;
  --cream-2: #fff9ec;
  --edge: #f2c46d;
  --wood: #a0652e;
  --wood-dark: #7a4a1e;
  --red: #e8543f;
  --green: #2f9e6e;
  --blue: #3b7dd8;
  --yellow: #f5b82e;
  --ink: #2b2118;
  --muted: #6b5a48;
  --radius: 18px;
  color-scheme: light;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font: 17px/1.55 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  color: var(--ink);
  background: var(--cream-2);
}

h1, h2, h3, .brand span {
  font-family: ui-rounded, "SF Pro Rounded", "Nunito", system-ui, sans-serif;
  line-height: 1.15;
  letter-spacing: -0.01em;
}

a { color: var(--blue); }
a:hover { color: #2459a6; }

code {
  font: 0.92em ui-monospace, "SF Mono", Consolas, monospace;
  background: var(--cream);
  border: 1px solid var(--edge);
  border-radius: 6px;
  padding: 0.05em 0.35em;
  white-space: nowrap;
}

q { quotes: "\201C" "\201D"; font-weight: 600; }

.small { font-size: 0.9rem; color: var(--muted); }
.hidden { display: none !important; }

/* header */

.top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  max-width: 1160px;
  margin: 0 auto;
  padding: 1rem 1.25rem;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  text-decoration: none;
  color: var(--ink);
  font-size: 1.45rem;
  font-weight: 800;
}

.top nav { display: flex; gap: 1.2rem; flex-wrap: wrap; }
.top nav a { color: var(--ink); text-decoration: none; font-weight: 600; }
.top nav a:hover { color: var(--wood); }

main { max-width: 1160px; margin: 0 auto; padding: 0 1.25rem; }

/* hero */

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.25fr);
  gap: 3rem;
  align-items: center;
  padding: 2.5rem 0 3rem;
}

.hero h1 { font-size: clamp(2.2rem, 4.6vw, 3.6rem); margin: 0 0 1rem; }
.lead { font-size: 1.2rem; margin: 0 0 1.75rem; }

.btn {
  display: inline-block;
  background: var(--green);
  color: #fff;
  text-decoration: none;
  font-weight: 700;
  border-radius: 999px;
  padding: 0.7rem 1.4rem;
  box-shadow: 0 3px 0 #22744f;
}
.btn:hover { background: #2a8c62; color: #fff; }
.btn:active { transform: translateY(2px); box-shadow: 0 1px 0 #22744f; }
.btn.big { font-size: 1.25rem; padding: 0.95rem 1.9rem; }

.get-note { margin: 0.7rem 0 0; color: var(--muted); font-size: 0.95rem; }
.get-note a { white-space: nowrap; }

.phone-note {
  background: var(--cream);
  border: 2px solid var(--edge);
  border-radius: var(--radius);
  padding: 1rem 1.2rem;
  margin: 0;
}

.hero-shots { position: relative; padding-bottom: 2.5rem; }

.shot {
  display: block;
  width: 100%;
  height: auto;
  border-radius: 12px;
  border: 1px solid #e4d3b0;
  box-shadow: 0 18px 40px -18px rgba(74, 46, 18, 0.45);
  background: #fff;
}

.hero .shot.phone {
  position: absolute;
  right: -0.75rem;
  bottom: 0;
  width: 27%;
  border-radius: 22px;
  border: 6px solid var(--ink);
}
.hero .shot.desk { width: 92%; }

/* the four short points */

.points {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1rem;
  margin: 0 0 3.5rem;
}
.points div {
  background: var(--cream);
  border: 2px solid var(--edge);
  border-radius: var(--radius);
  padding: 0.9rem 1.1rem;
}
.points b { display: block; font-size: 1.1rem; }
.points span { color: var(--muted); font-size: 0.95rem; }
.points div:nth-child(1) { border-color: var(--red); }
.points div:nth-child(2) { border-color: var(--green); }
.points div:nth-child(3) { border-color: var(--blue); }
.points div:nth-child(4) { border-color: var(--yellow); }

/* features */

.feature {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr);
  gap: 3rem;
  align-items: center;
  margin: 0 0 4.5rem;
}
.feature.flip > img { order: 2; }
.feature h2 { font-size: clamp(1.6rem, 3vw, 2.2rem); margin: 0 0 0.8rem; }
.feature p { margin: 0 0 0.9rem; }

/* download */

.download, .install, .questions {
  background: #fff;
  border: 2px solid var(--edge);
  border-radius: 28px;
  padding: 2rem clamp(1.1rem, 4vw, 2.75rem);
  margin: 0 0 2.5rem;
}
.download h2, .install h2, .questions h2 { font-size: 2rem; margin: 0 0 0.5rem; }

.release { margin: 0 0 1.25rem; }

.files {
  list-style: none;
  margin: 0 0 1.25rem;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 0.75rem;
}
.files a {
  display: grid;
  grid-template-columns: 1fr auto;
  grid-template-rows: auto auto;
  column-gap: 0.75rem;
  padding: 0.85rem 1.1rem;
  border: 2px solid var(--edge);
  border-radius: 14px;
  text-decoration: none;
  color: var(--ink);
  background: var(--cream-2);
}
.files a:hover { border-color: var(--green); background: #f3fbf6; }
.files b { grid-column: 1; }
.files span { grid-column: 1; color: var(--muted); font-size: 0.9rem; }
.files i {
  grid-column: 2;
  grid-row: 1 / span 2;
  align-self: center;
  font-style: normal;
  color: var(--muted);
  font-size: 0.9rem;
  white-space: nowrap;
}
.files li.mine a { border-color: var(--green); background: #f3fbf6; }
.files li.mine b::after {
  content: "Your computer";
  margin-left: 0.5rem;
  font-size: 0.75rem;
  font-weight: 700;
  color: #fff;
  background: var(--green);
  border-radius: 999px;
  padding: 0.1rem 0.5rem;
  vertical-align: 0.15em;
}

/* install */

.install details, .questions details {
  border-top: 2px solid var(--cream);
  padding: 0.25rem 0;
}
.install summary, .questions summary {
  cursor: pointer;
  font-weight: 700;
  font-size: 1.15rem;
  padding: 0.75rem 0;
}
.install details[open] summary { color: var(--wood); }
.install ol { padding-left: 1.4rem; }
.install li { margin: 0 0 0.7rem; }
.install h3 { font-size: 1.35rem; margin: 2rem 0 0.5rem; }

.step {
  display: block;
  width: 100%;
  max-width: 480px;
  height: auto;
  margin: 0.75rem 0 0.25rem;
  border-radius: 10px;
  border: 1px solid #e4d3b0;
}

.warn {
  background: #fdecea;
  border-left: 5px solid var(--red);
  border-radius: 8px;
  padding: 0.75rem 1rem;
}

.questions p { margin: 0 0 1rem; }

/* footer */

footer {
  max-width: 1160px;
  margin: 0 auto;
  padding: 1rem 1.25rem 3rem;
  color: var(--muted);
}
footer img { vertical-align: -4px; }

/* narrow screens */

@media (max-width: 860px) {
  .hero { grid-template-columns: 1fr; gap: 2rem; padding-top: 1.25rem; }
  .feature, .feature.flip { grid-template-columns: 1fr; gap: 1.25rem; margin-bottom: 3rem; }
  .feature.flip > img { order: 0; }
  .points { grid-template-columns: repeat(2, 1fr); }
  .top nav a:not(:last-child) { display: none; }
}

@media (max-width: 480px) {
  body { font-size: 16px; }
  .points { grid-template-columns: 1fr; }
  .btn.big { display: block; text-align: center; }
}