:root {
  --ink: #1e1b4b;
  --muted: #5f6791;
  --indigo: #4f46e5;
  --pink: #ec4899;
  --line: rgba(99, 102, 241, 0.18);
  --card: rgba(255, 255, 255, 0.78);
  color-scheme: light;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--ink);
  font-family: ui-rounded, 'SF Pro Rounded', system-ui, -apple-system, 'Segoe UI', sans-serif;
  line-height: 1.55;
  background:
    radial-gradient(1100px 650px at 10% -10%, #c7d2fe 0%, transparent 62%),
    radial-gradient(900px 600px at 105% 0%, #fbcfe8 0%, transparent 55%),
    linear-gradient(165deg, #eef2ff 0%, #e0f2fe 100%);
  background-attachment: fixed;
  -webkit-font-smoothing: antialiased;
}

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

.topbar {
  position: sticky;
  top: 0;
  z-index: 30;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 12px clamp(16px, 4vw, 48px);
  background: rgba(238, 242, 255, 0.82);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(12px);
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--ink);
  font-weight: 800;
  text-decoration: none;
  letter-spacing: -0.01em;
}

.brand img {
  border-radius: 9px;
  box-shadow: 0 6px 14px -8px rgba(49, 46, 129, 0.8);
}

.topbar nav {
  display: flex;
  gap: clamp(10px, 2.4vw, 24px);
  font-size: 0.92rem;
  font-weight: 600;
}

.topbar nav a {
  color: var(--muted);
  text-decoration: none;
}

.topbar nav a:hover {
  color: var(--indigo);
}

main {
  width: min(1080px, 100%);
  margin: 0 auto;
  padding: 0 clamp(16px, 4vw, 32px) 40px;
}

/* ---------- hero ---------- */

.hero {
  text-align: center;
  padding: clamp(36px, 7vw, 76px) 0 clamp(20px, 4vw, 40px);
}

.badge {
  display: inline-block;
  margin: 0 0 18px;
  padding: 6px 14px;
  border-radius: 999px;
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: #4338ca;
  background: rgba(255, 255, 255, 0.72);
  border: 1px solid var(--line);
}

.hero-icon {
  width: clamp(96px, 16vw, 144px);
  height: auto;
  border-radius: 26px;
  box-shadow: 0 34px 60px -30px rgba(49, 46, 129, 0.75);
}

.hero h1 {
  margin: 18px 0 8px;
  font-size: clamp(2.6rem, 8vw, 4.6rem);
  line-height: 1;
  letter-spacing: -0.045em;
  background: linear-gradient(120deg, #4338ca 0%, #6366f1 45%, #db2777 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.lede {
  width: min(600px, 100%);
  margin: 0 auto 26px;
  font-size: clamp(1rem, 2.2vw, 1.18rem);
  color: var(--muted);
}

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

.button {
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 1px;
  min-width: 190px;
  padding: 11px 22px;
  border-radius: 16px;
  font: inherit;
  font-size: 0.98rem;
  font-weight: 700;
  text-decoration: none;
  color: #3730a3;
  background: rgba(255, 255, 255, 0.82);
  border: 1px solid var(--line);
  box-shadow: 0 12px 24px -18px rgba(49, 46, 129, 0.8);
  transition: transform 0.12s ease, box-shadow 0.12s ease, background 0.12s ease;
}

.button small {
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--muted);
}

.button:hover {
  transform: translateY(-2px);
  box-shadow: 0 18px 28px -18px rgba(49, 46, 129, 0.9);
}

.button.primary {
  color: #fff;
  background: linear-gradient(135deg, #4f46e5, #7c3aed);
  border-color: transparent;
  box-shadow: 0 16px 30px -16px rgba(79, 70, 229, 0.9);
}

.button.primary small {
  color: rgba(255, 255, 255, 0.78);
}

.button[aria-disabled='true'] {
  cursor: not-allowed;
  opacity: 0.6;
  transform: none;
}

.meta {
  margin: 16px 0 0;
  font-size: 0.85rem;
  color: var(--muted);
}

/* ---------- demo sheet ---------- */

.demo {
  width: min(620px, 100%);
  margin: 34px auto 0;
}

.demo-sheet {
  --gap: clamp(5px, 1.2vw, 10px);
  --pad: clamp(12px, 2.4vw, 22px);
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: var(--gap);
  padding: var(--pad);
  border-radius: 26px;
  background: linear-gradient(150deg, #ffffff 0%, #eef1ff 100%);
  box-shadow:
    0 34px 60px -30px rgba(49, 46, 129, 0.6),
    inset 0 2px 0 #ffffff,
    inset 0 -10px 26px rgba(99, 102, 241, 0.14);
}

.demo-sheet span {
  aspect-ratio: 1;
  border-radius: 50%;
  background:
    radial-gradient(circle at 32% 26%, rgba(255, 255, 255, 0.95) 0 9%, rgba(255, 255, 255, 0.38) 24%, transparent 46%),
    radial-gradient(circle at 50% 58%, #dde5ff 0%, #b7c4ff 55%, #93a7ff 80%, #7d8ff6 100%);
  box-shadow:
    0 5px 9px -5px rgba(30, 41, 99, 0.45),
    inset 0 -5px 9px rgba(40, 50, 120, 0.22),
    inset 0 4px 8px rgba(255, 255, 255, 0.75);
  cursor: pointer;
  transition: transform 0.12s ease, box-shadow 0.12s ease;
}

.demo-sheet span:hover {
  transform: scale(1.05);
}

.demo-sheet span.popped {
  cursor: default;
  background: radial-gradient(circle at 50% 45%, #e7eaf7 0%, #d4d9ef 55%, #c2c9e6 100%);
  box-shadow:
    inset 0 4px 9px rgba(51, 65, 140, 0.34),
    inset 0 -2px 4px rgba(255, 255, 255, 0.9);
}

.demo-hint {
  margin: 12px 0 0;
  font-size: 0.82rem;
  color: var(--muted);
  text-align: center;
}

/* ---------- sections ---------- */

.features,
.ad-slot,
.upgrade,
.install {
  margin-top: clamp(40px, 7vw, 72px);
}

h2 {
  margin: 0 0 8px;
  font-size: clamp(1.4rem, 3.4vw, 1.9rem);
  letter-spacing: -0.025em;
  text-align: center;
}

.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 16px;
  margin-top: 22px;
}

.card {
  padding: 22px;
  border-radius: 22px;
  background: var(--card);
  border: 1px solid rgba(255, 255, 255, 0.9);
  box-shadow: 0 20px 34px -28px rgba(49, 46, 129, 0.6);
  backdrop-filter: blur(8px);
}

.card .icon {
  font-size: 1.5rem;
}

.card h3 {
  margin: 10px 0 6px;
  font-size: 1.02rem;
}

.card p {
  margin: 0;
  font-size: 0.92rem;
  color: var(--muted);
}

/* ---------- ads ---------- */

.ad-slot {
  padding: 14px;
  border-radius: 20px;
  background: rgba(255, 255, 255, 0.5);
  border: 1px dashed rgba(99, 102, 241, 0.35);
  text-align: center;
}

.ad-label {
  margin: 0 0 8px;
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: #8189ad;
}

.ad-fallback {
  margin: 0;
  padding: 10px;
  font-size: 0.88rem;
  color: var(--muted);
}

.ad-fallback a {
  font-weight: 700;
}

/* ---------- upgrade ---------- */

.upgrade {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: clamp(20px, 3.4vw, 30px);
  border-radius: 26px;
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.9), rgba(224, 231, 255, 0.9));
  border: 1px solid rgba(255, 255, 255, 0.95);
  box-shadow: 0 24px 40px -32px rgba(49, 46, 129, 0.7);
}

.upgrade h2 {
  margin: 0 0 6px;
  text-align: left;
  font-size: clamp(1.25rem, 2.8vw, 1.6rem);
}

.upgrade p {
  margin: 0;
  max-width: 56ch;
  color: var(--muted);
  font-size: 0.94rem;
}

.upgrade .button {
  min-width: 210px;
}

/* ---------- install + footer ---------- */

.install {
  padding: clamp(20px, 3.4vw, 30px);
  border-radius: 26px;
  background: rgba(255, 255, 255, 0.6);
  border: 1px solid rgba(255, 255, 255, 0.9);
}

.install h2 {
  text-align: left;
}

.install p {
  margin: 10px 0 0;
  color: var(--muted);
  font-size: 0.93rem;
}

footer {
  padding: 28px 16px 40px;
  text-align: center;
  color: var(--muted);
  font-size: 0.88rem;
  border-top: 1px solid var(--line);
}

footer p {
  margin: 4px 0;
}

footer a {
  font-weight: 700;
  color: var(--indigo);
  text-decoration: none;
}

footer a:hover {
  text-decoration: underline;
}

.fine {
  font-size: 0.8rem;
  color: #7b82a6;
}

pre {
  margin: 10px 0 0;
  padding: 12px 14px;
  border-radius: 14px;
  background: rgba(30, 27, 75, 0.06);
  border: 1px solid var(--line);
  overflow-x: auto;
}

code {
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 0.85em;
}

.install h3 {
  margin: 18px 0 0;
  font-size: 0.95rem;
}

@media (max-width: 600px) {
  .topbar nav a:not(:last-child) {
    display: none;
  }

  .downloads .button {
    width: 100%;
  }

  .upgrade {
    flex-direction: column;
    align-items: stretch;
  }

  .upgrade .button {
    width: 100%;
  }
}

@media (prefers-reduced-motion: reduce) {
  * {
    transition: none !important;
  }
}