:root {
  color-scheme: light dark;
  --bg: #f5f5f7;
  --surface: rgba(255, 255, 255, 0.82);
  --text: #1d1d1f;
  --secondary: #6e6e73;
  --line: rgba(0, 0, 0, 0.1);
  --accent: #0071e3;
  --code: rgba(0, 0, 0, 0.06);
}

* { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  scroll-padding-top: 5rem;
}

body {
  margin: 0;
  background:
    radial-gradient(circle at 50% -10%, rgba(0, 113, 227, 0.12), transparent 32rem),
    var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "PingFang SC", "Helvetica Neue", Arial, sans-serif;
  font-size: 17px;
  line-height: 1.68;
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--accent);
  text-decoration-thickness: 0.08em;
  text-underline-offset: 0.16em;
}

a:hover { text-decoration-thickness: 0.12em; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  border-bottom: 1px solid var(--line);
  background: color-mix(in srgb, var(--bg) 78%, transparent);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
}

.header-inner {
  width: min(100% - 2rem, 1120px);
  min-height: 3.5rem;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  color: var(--text);
  font-weight: 650;
  text-decoration: none;
}

.brand-icon {
  width: 2rem;
  height: 2rem;
  border-radius: 0.48rem;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.14);
}

nav { display: flex; gap: 1.1rem; }
nav a {
  color: var(--secondary);
  font-size: 0.92rem;
  text-decoration: none;
  transition: color 180ms ease, transform 180ms cubic-bezier(.2, .8, .2, 1);
}
nav a:hover { color: var(--accent); }
nav a:active { transform: scale(0.97); transition-duration: 80ms; }

main {
  width: min(100% - 2rem, 920px);
  margin: 0 auto;
  padding: 4.5rem 0 3rem;
}

.hero {
  padding: 2.5rem 0 4rem;
  text-align: center;
}

.eyebrow {
  margin: 0 0 0.6rem;
  color: var(--accent);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.14em;
}

h1 {
  margin: 0;
  font-size: clamp(2.25rem, 7vw, 4.5rem);
  line-height: 1.06;
  letter-spacing: -0.045em;
}

.hero > p:last-child { color: var(--secondary); }

article {
  padding: clamp(1.4rem, 4vw, 3.5rem);
  border: 1px solid var(--line);
  border-radius: 28px;
  background: var(--surface);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.06);
}

h2 {
  margin: 0 0 2rem;
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  line-height: 1.15;
  letter-spacing: -0.025em;
}

h3 {
  margin: 2.4rem 0 0.7rem;
  font-size: 1.2rem;
  line-height: 1.3;
}

p { margin: 0.7rem 0; }
ul { margin: 0.7rem 0; padding-left: 1.35rem; }
li + li { margin-top: 0.45rem; }

code {
  padding: 0.12rem 0.35rem;
  border-radius: 0.4rem;
  background: var(--code);
  font-family: "SFMono-Regular", Consolas, monospace;
  font-size: 0.88em;
}

hr {
  width: 4rem;
  margin: 4rem auto;
  border: 0;
  border-top: 2px solid var(--line);
}

.external-links { list-style: none; padding-left: 0; }

.support-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
  margin: 1.4rem 0 0;
}

.support-card {
  padding: 1.25rem;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: color-mix(in srgb, var(--surface) 88%, transparent);
}

.support-card h3 { margin-top: 0; }

.action-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.4rem;
}

.button-link {
  display: inline-flex;
  min-height: 2.75rem;
  align-items: center;
  justify-content: center;
  padding: 0.55rem 1rem;
  border-radius: 999px;
  background: var(--accent);
  color: #fff;
  font-weight: 650;
  text-decoration: none;
}

.button-link.secondary {
  border: 1px solid var(--line);
  background: transparent;
  color: var(--accent);
}

.muted { color: var(--secondary); }

footer {
  padding: 0 1rem 3rem;
  color: var(--secondary);
  text-align: center;
  font-size: 0.9rem;
}

/* Homepage */
.landing-page {
  background:
    radial-gradient(circle at 84% 12%, rgba(255, 91, 66, 0.16), transparent 25rem),
    radial-gradient(circle at 14% 46%, rgba(255, 196, 76, 0.12), transparent 28rem),
    var(--bg);
}

.landing-main {
  width: min(100% - 2rem, 1120px);
  padding-top: 2rem;
}

.landing-page .header-inner,
.landing-footer {
  width: min(100% - 2rem, 1120px);
}

.landing-hero {
  min-height: 670px;
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(380px, 0.95fr);
  align-items: center;
  gap: clamp(2rem, 6vw, 6rem);
  padding: 5rem 0 7rem;
}

.landing-copy h1 {
  max-width: 740px;
  font-size: clamp(2.6rem, 5.2vw, 4.6rem);
}

.landing-lede {
  max-width: 650px;
  margin-top: 1.6rem;
  color: var(--secondary);
  font-size: clamp(1.08rem, 2vw, 1.35rem);
  line-height: 1.65;
}

.landing-actions { margin-top: 2rem; }

.landing-visual {
  position: relative;
  min-height: 460px;
  display: grid;
  place-items: center;
  isolation: isolate;
}

.icon-glow {
  position: absolute;
  z-index: -1;
  width: 390px;
  height: 390px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(255, 114, 67, 0.34), rgba(255, 189, 77, 0.08) 55%, transparent 72%);
  filter: blur(8px);
}

.hero-app-icon {
  width: min(56vw, 250px);
  height: auto;
  border-radius: 24%;
  filter: drop-shadow(0 28px 34px rgba(140, 62, 20, 0.2));
}

.deadline-card {
  position: absolute;
  min-width: 185px;
  padding: 0.9rem 1.05rem;
  border: 1px solid rgba(255, 255, 255, 0.55);
  border-radius: 18px;
  background: color-mix(in srgb, var(--surface) 88%, transparent);
  box-shadow: 0 14px 38px rgba(62, 31, 15, 0.13);
  backdrop-filter: blur(22px) saturate(160%);
  -webkit-backdrop-filter: blur(22px) saturate(160%);
}

.deadline-card span,
.deadline-card strong { display: block; }
.deadline-card span { font-size: 0.88rem; color: var(--secondary); }
.deadline-card strong { margin-top: 0.18rem; font-size: 1.05rem; }
.deadline-card-primary { top: 12%; right: 0; }
.deadline-card-secondary { bottom: 10%; left: 0; }

.feature-section { padding: 5rem 0 7rem; }
.section-heading { max-width: 720px; margin-bottom: 2.5rem; }
.section-heading h2,
.privacy-callout h2 { margin-bottom: 0; font-size: clamp(2.3rem, 5vw, 4rem); }

.feature-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1.2rem;
}

.feature-card {
  min-height: 230px;
  display: flex;
  flex-direction: column;
  padding: 1.5rem;
  border-radius: 26px;
}

.feature-card h3 {
  min-height: 3.2rem;
  margin: 2.8rem 0 0.55rem;
  display: flex;
  align-items: flex-start;
  font-size: 1.38rem;
}

.feature-card p {
  min-height: 3.9rem;
  margin-top: 0;
  color: var(--secondary);
}
.feature-number { color: #ff6045; font-size: 0.82rem; font-weight: 750; letter-spacing: 0.12em; }

.privacy-callout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 0.8fr);
  gap: clamp(2rem, 7vw, 6rem);
  align-items: end;
  margin-bottom: 7rem;
  padding: clamp(2rem, 5vw, 4rem);
  border: 1px solid var(--line);
  border-radius: 32px;
  background: var(--surface);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.06);
}

.privacy-callout p { color: var(--secondary); }
.text-link { display: inline-block; margin-top: 0.8rem; font-weight: 650; text-decoration: none; }

.landing-footer {
  margin: 0 auto;
  padding: 0 0 3rem;
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  color: var(--secondary);
  font-size: 0.9rem;
}

.landing-footer div { display: flex; gap: 1.2rem; }

/* Download */
.download-page {
  background:
    radial-gradient(circle at 76% 18%, rgba(255, 101, 69, 0.16), transparent 26rem),
    radial-gradient(circle at 22% 54%, rgba(255, 196, 76, 0.11), transparent 30rem),
    var(--bg);
}

.download-main {
  width: min(100% - 2rem, 1120px);
  padding-top: 3rem;
}

.download-hero {
  min-height: 650px;
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(360px, 0.95fr);
  align-items: center;
  gap: clamp(2rem, 7vw, 6rem);
  padding: 4rem 0 6rem;
}

.download-copy h1 {
  max-width: 700px;
  font-size: clamp(2.7rem, 5.5vw, 4.8rem);
}

.download-copy > p:not(.eyebrow) {
  max-width: 650px;
  margin-top: 1.5rem;
  color: var(--secondary);
  font-size: clamp(1.05rem, 2vw, 1.3rem);
}

.download-button { min-width: 11rem; }

.download-note {
  margin-top: 1rem !important;
  font-size: 0.86rem !important;
}

.download-steps {
  padding: 34px;
  border: 1px solid var(--line);
  border-radius: 26px;
  background: #fff;
}

.download-steps h2 {
  margin: 0 0 12px;
  font-size: 25px;
  letter-spacing: -0.03em;
}
.download-steps ol { margin: 25px 0 0; padding: 0; list-style: none; }
.download-steps li {
  display: grid;
  grid-template-columns: 38px 1fr;
  gap: 14px;
  padding: 20px 0;
  border-top: 1px solid var(--line);
}
.download-steps li > span {
  width: 32px;
  height: 32px;
  display: grid;
  place-items: center;
  border-radius: 10px;
  color: #ff6045;
  background: #fff0eb;
  font-weight: 750;
}
.download-steps p {
  margin: 4px 0 0;
  color: var(--secondary);
  line-height: 1.6;
}

.download-card {
  display: grid;
  justify-items: center;
  gap: 1.4rem;
  padding: clamp(2rem, 5vw, 3.5rem);
  border: 1px solid var(--line);
  border-radius: 32px;
  background: color-mix(in srgb, var(--surface) 90%, transparent);
  box-shadow: 0 24px 70px rgba(107, 53, 24, 0.12);
  text-align: center;
  backdrop-filter: blur(24px) saturate(160%);
  -webkit-backdrop-filter: blur(24px) saturate(160%);
}

.download-card img {
  width: min(48vw, 180px);
  height: auto;
  border-radius: 24%;
  filter: drop-shadow(0 24px 30px rgba(140, 62, 20, 0.2));
}

.download-card h2 {
  margin: 0;
  font-size: clamp(1.8rem, 4vw, 2.6rem);
}

.download-card p {
  margin: -0.7rem 0 0;
  color: var(--secondary);
}

@media (max-width: 820px) {
  .landing-hero { grid-template-columns: 1fr; padding-top: 4rem; }
  .landing-visual { min-height: 400px; }
  .feature-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .feature-card { min-height: 210px; }
  .privacy-callout { grid-template-columns: 1fr; }
  .download-hero { grid-template-columns: 1fr; padding-top: 3rem; }
}

@media (max-width: 600px) {
  body { font-size: 16px; }
  main { padding-top: 2.5rem; }
  .hero { padding: 2rem 0 3rem; }
  article { border-radius: 22px; }
  h1 span { display: none; }
  .support-grid { grid-template-columns: 1fr; }
  .site-header .header-inner {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
    gap: 0.65rem;
    padding: 0.7rem 0;
  }
  .site-header .brand { flex: 0 0 auto; }
  .site-header .brand-icon { width: 1.8rem; height: 1.8rem; }
  .site-header nav { flex: 1 1 auto; justify-content: flex-end; gap: 0.45rem 0.7rem; white-space: nowrap; }
  .site-header nav a { font-size: 0.8rem; }
  .landing-hero { min-height: auto; padding: 3.5rem 0 5rem; }
  .landing-copy h1 { font-size: clamp(2.2rem, 10vw, 3.2rem); }
  .landing-visual { min-height: 340px; }
  .hero-app-icon { width: 190px; }
  .deadline-card { min-width: 160px; padding: 0.72rem 0.85rem; }
  .deadline-card-primary { top: 5%; }
  .deadline-card-secondary { bottom: 4%; }
  .feature-grid { grid-template-columns: 1fr; }
  .feature-card { min-height: 210px; }
  .feature-card h3 { margin-top: 2.4rem; }
  .feature-section { padding: 3rem 0 5rem; }
  .privacy-callout { margin-bottom: 5rem; border-radius: 24px; }
  .landing-footer { flex-direction: column; }
  .download-main { padding-top: 1.5rem; }
  .download-hero { min-height: auto; padding: 2.5rem 0 4rem; }
  .download-card { border-radius: 24px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  nav a { transition: none; }
}

@media (prefers-reduced-transparency: reduce) {
  .site-header,
  .download-steps,
  .download-card { background: var(--bg); backdrop-filter: none; }
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #000;
    --surface: rgba(28, 28, 30, 0.82);
    --text: #f5f5f7;
    --secondary: #a1a1a6;
    --line: rgba(255, 255, 255, 0.14);
    --accent: #2997ff;
    --code: rgba(255, 255, 255, 0.1);
  }

  article { box-shadow: 0 24px 70px rgba(0, 0, 0, 0.34); }
}

@media print {
  .site-header { position: static; backdrop-filter: none; }
  body { background: #fff; color: #000; }
  main { width: 100%; padding: 1rem; }
  article { border: 0; box-shadow: none; padding: 0; break-after: page; }
  a { color: #000; }
}