:root {
  --sky: #c9dcf6;
  --cloud: #ffffff;
  --cloud-shade: #dfe6f2;
  --ink: #1d1d1f;
  --ink-soft: #5d6270;
  --page: #ffffff;
  --camera: #34c759;
  --tasks: #ff9500;
  --pen: #ff3b30;
  --timer: #af52de;
  --clipboard: #007aff;
  --focus: #007aff;

  --step--1: 0.875rem;
  --step-0: 1.0625rem;
  --step-1: 1.3125rem;
  --step-2: clamp(1.5rem, 1.1rem + 1.6vw, 2.125rem);

  font-family: "Figtree", system-ui, -apple-system, sans-serif;
  color: var(--ink);
  background: var(--page);
  -webkit-font-smoothing: antialiased;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --sky: #0e1524;
    --cloud: #dfe6f2;
    --cloud-shade: #8d99b3;
    --ink: #f2f3f7;
    --ink-soft: #a3a9b8;
    --page: #0a0f1a;
    --focus: #5aa9ff;
  }
}
:root[data-theme="dark"] {
  --sky: #0e1524;
  --cloud: #dfe6f2;
  --cloud-shade: #8d99b3;
  --ink: #f2f3f7;
  --ink-soft: #a3a9b8;
  --page: #0a0f1a;
  --focus: #5aa9ff;
}

* { box-sizing: border-box; }
body { margin: 0; background: var(--page); line-height: 1.5; font-size: var(--step-0); }
a { color: inherit; text-underline-offset: 0.2em; text-decoration-thickness: 1px; }
a:hover { text-decoration-thickness: 2px; }
:focus-visible { outline: 2px solid var(--focus); outline-offset: 3px; border-radius: 6px; }

/* The welcome, as the app plays it: clouds come down, then the dots, one by one. */
.welcome {
  position: relative;
  min-height: 100svh;
  display: grid;
  place-items: center;
  overflow: hidden;
  background: linear-gradient(var(--sky) 20%, var(--page) 95%);
  padding: 96px 16px 72px;
}
.clouds {
  position: absolute;
  inset: -12% -10% auto;
  height: 62%;
  width: 120%;
  pointer-events: none;
  animation: descend 1.6s cubic-bezier(0.2, 0.7, 0.2, 1) both;
}
.clouds .puff { fill: var(--cloud); }
.clouds .shade { fill: var(--cloud-shade); }
.clouds .drift { animation: drift 60s linear infinite alternate; }
@keyframes descend { from { transform: translateY(-45%); opacity: 0; } }
@keyframes drift { to { transform: translateX(-4%); } }

.stage {
  position: relative;
  z-index: 1;
  width: min(100%, 640px);
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}

.brand { display: flex; align-items: center; gap: 10px; font-weight: 500; font-size: var(--step-0); margin: 0 0 56px; }
.brand img { width: 32px; height: 32px; }

/* The card for the clicked dot sits above the row, in a slot that keeps its height. */
.preview-slot { min-height: 150px; width: 100%; display: flex; align-items: flex-end; justify-content: center; margin-bottom: 28px; }
.preview {
  width: min(100%, 360px);
  text-align: left;
  background: var(--page);
  border-radius: 20px;
  padding: 18px 20px;
  box-shadow: 0 18px 40px -18px rgb(20 30 60 / 0.35), 0 0 0 1px rgb(20 30 60 / 0.06);
  transition: opacity 0.2s ease, transform 0.3s cubic-bezier(0.2, 0.8, 0.2, 1);
}
.preview[hidden] { display: block; visibility: hidden; opacity: 0; transform: translateY(8px) scale(0.98); }
.preview h2 { font-size: var(--step-1); font-weight: 500; margin: 0 0 4px; display: flex; justify-content: space-between; gap: 12px; align-items: baseline; }
.preview p { margin: 0; color: var(--ink-soft); font-size: var(--step--1); line-height: 1.45; }

kbd {
  font: 500 0.8125rem/1 "Figtree", system-ui, sans-serif;
  color: var(--ink-soft);
  border: 1px solid color-mix(in srgb, var(--ink) 18%, transparent);
  border-radius: 999px;
  padding: 4px 8px;
  white-space: nowrap;
}

.dots { list-style: none; display: flex; gap: clamp(14px, 4vw, 40px); margin: 0; padding: 0; }
.dot {
  --size: clamp(52px, 13vw, 88px);
  width: var(--size);
  height: var(--size);
  border-radius: 50%;
  border: 0;
  background: var(--tint);
  color: #fff;
  display: grid;
  place-items: center;
  cursor: pointer;
  box-shadow: 0 12px 28px -10px color-mix(in srgb, var(--tint) 75%, transparent);
  transition: transform 0.25s cubic-bezier(0.3, 1.6, 0.5, 1);
  animation: emerge 0.9s ease-out both;
  animation-delay: calc(0.8s + var(--i) * 0.35s);
}
.dot svg { width: 42%; height: 42%; }
.dot:hover { transform: scale(1.06); }
.dot[aria-pressed="true"] { outline: 2.5px solid var(--tint); outline-offset: 6px; }
@keyframes emerge { from { opacity: 0; transform: scale(0.8); filter: blur(14px); } }

.message {
  font-weight: 300;
  font-size: var(--step-2);
  line-height: 1.25;
  letter-spacing: -0.01em;
  max-width: 26ch;
  margin: 48px 0 12px;
  text-wrap: balance;
  animation: appear 0.6s ease-out both 3s;
}
.hint { margin: 0; color: var(--ink-soft); font-size: var(--step-0); font-weight: 300; animation: appear 0.6s ease-out both 3.6s; }
@keyframes appear { from { opacity: 0; transform: translateY(10px); } }

.download {
  display: inline-block;
  margin-top: 32px;
  padding: 13px 30px;
  border-radius: 999px;
  background: var(--ink);
  color: var(--page);
  font-weight: 500;
  text-decoration: none;
  animation: appear 0.6s ease-out both 3.6s;
}
.download[aria-disabled="true"] { cursor: default; }
.requirement { margin: 12px 0 0; color: var(--ink-soft); font-size: var(--step--1); animation: appear 0.6s ease-out both 3.6s; }

/* Below the welcome: the same five, plainly. */
.tools { width: min(100% - 32px, 600px); margin: 24px auto 0; padding: 0; list-style: none; }
.tools li { display: grid; grid-template-columns: 14px 1fr auto; gap: 6px 16px; padding: 20px 0; border-top: 1px solid color-mix(in srgb, var(--ink) 10%, transparent); }
.tools li::before { content: ""; width: 14px; height: 14px; border-radius: 50%; background: var(--tint); margin-top: 6px; }
.tools h3 { margin: 0; font-size: var(--step-1); font-weight: 500; }
.tools p { grid-column: 2 / 4; margin: 0; color: var(--ink-soft); max-width: 60ch; }
.tools kbd { align-self: center; }

.promise { width: min(100% - 32px, 600px); margin: 72px auto 0; font-weight: 300; font-size: var(--step-1); line-height: 1.4; }

footer { width: min(100% - 32px, 600px); margin: 72px auto 0; padding: 24px 0 48px; display: flex; flex-wrap: wrap; gap: 8px 24px; color: var(--ink-soft); font-size: var(--step--1); border-top: 1px solid color-mix(in srgb, var(--ink) 10%, transparent); }
footer .spacer { flex: 1; }

/* Privacy and Support: one readable column. */
.page { width: min(100% - 32px, 640px); margin: 0 auto; padding: 56px 0 0; }
.page .brand { margin-bottom: 48px; text-decoration: none; }
.page h1 { font-weight: 300; font-size: var(--step-2); line-height: 1.2; margin: 0 0 8px; }
.page h2 { font-size: var(--step-1); font-weight: 500; margin: 40px 0 8px; }
.page p, .page li { max-width: 64ch; }
.page .updated { color: var(--ink-soft); margin: 0 0 32px; }
.page footer { width: 100%; }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; }
}
@media (max-width: 520px) {
  .preview-slot { min-height: 170px; }
  .tools li { grid-template-columns: 14px 1fr; }
  .tools kbd { grid-column: 2; justify-self: start; }
}