:root {
  color-scheme: light;
  --ink: #0b1635;
  --muted: #52617c;
  --blue: #1d62e8;
  --blue-dark: #1041a5;
  --teal: #09b6aa;
  --teal-soft: #d9fbf6;
  --sky-soft: #e8f1ff;
  --line: rgba(25, 70, 148, 0.14);
  --surface: rgba(255, 255, 255, 0.88);
  --shadow: 0 24px 70px rgba(20, 69, 146, 0.13);
  --shadow-soft: 0 14px 40px rgba(24, 65, 133, 0.09);
  --radius: 28px;
}

* { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  background: #f8fbff;
}

body {
  margin: 0;
  min-width: 320px;
  overflow-x: hidden;
  color: var(--ink);
  background:
    radial-gradient(circle at 8% 4%, rgba(86, 145, 255, 0.17), transparent 32rem),
    radial-gradient(circle at 92% 14%, rgba(42, 220, 192, 0.14), transparent 30rem),
    linear-gradient(180deg, #fbfdff 0%, #f7faff 62%, #f3f9fc 100%);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--blue-dark); text-underline-offset: 0.18em; }
a:hover { color: var(--blue); }

.skip-link {
  position: fixed;
  top: 12px;
  left: 12px;
  z-index: 100;
  padding: 10px 16px;
  border-radius: 12px;
  background: #fff;
  transform: translateY(-160%);
}
.skip-link:focus { transform: translateY(0); }

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  border-bottom: 1px solid rgba(25, 70, 148, 0.09);
  background: rgba(249, 252, 255, 0.82);
  backdrop-filter: blur(20px) saturate(145%);
  -webkit-backdrop-filter: blur(20px) saturate(145%);
}

.nav,
.shell {
  width: min(1160px, calc(100% - 40px));
  margin: 0 auto;
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 76px;
  gap: 24px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  color: var(--ink);
  font-size: 1.13rem;
  font-weight: 820;
  letter-spacing: -0.02em;
  text-decoration: none;
}

.brand img {
  width: 46px;
  height: 46px;
  border-radius: 13px;
  box-shadow: 0 9px 24px rgba(20, 72, 172, 0.2);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 24px;
  font-weight: 680;
}

.nav-links a { text-decoration: none; }
.nav-links a:focus-visible,
.brand:focus-visible,
.button:focus-visible,
.footer-links a:focus-visible {
  outline: 3px solid rgba(29, 98, 232, 0.28);
  outline-offset: 5px;
  border-radius: 8px;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.04fr) minmax(390px, 0.96fr);
  align-items: center;
  gap: clamp(44px, 6vw, 84px);
  min-height: 670px;
  padding: clamp(58px, 7vw, 86px) 0 66px;
}

.hero-content { position: relative; z-index: 2; }

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  margin: 0 0 18px;
  color: #0b716f;
  font-size: 0.82rem;
  font-weight: 820;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.eyebrow::before {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--teal);
  box-shadow: 0 0 0 7px rgba(9, 182, 170, 0.12);
  content: "";
}

h1,
h2,
h3 { line-height: 1.13; letter-spacing: -0.035em; }

h1 {
  max-width: 690px;
  margin: 0;
  font-size: clamp(3.1rem, 6.3vw, 5.45rem);
}

.app-name {
  display: block;
  margin-bottom: 12px;
  color: var(--blue-dark);
  font-size: clamp(1.65rem, 3vw, 2.25rem);
  font-weight: 850;
  letter-spacing: -0.025em;
}

.gradient-text {
  color: transparent;
  background: linear-gradient(105deg, #1559d5 4%, #008f98 86%);
  background-clip: text;
  -webkit-background-clip: text;
}

.hero-copy {
  max-width: 690px;
  margin: 24px 0 0;
  color: var(--muted);
  font-size: clamp(1.08rem, 2.2vw, 1.32rem);
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 13px;
  margin-top: 30px;
}

.button {
  display: inline-flex;
  min-height: 52px;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 0 22px;
  border: 1px solid transparent;
  border-radius: 16px;
  font-weight: 800;
  text-decoration: none;
  cursor: pointer;
}

.button-primary {
  color: #fff;
  background: linear-gradient(135deg, #246cea, #0a9caa);
  box-shadow: 0 13px 30px rgba(26, 93, 211, 0.24);
}
.button-primary:hover { color: #fff; transform: translateY(-1px); }

.button-secondary {
  color: var(--ink);
  border-color: var(--line);
  background: rgba(255, 255, 255, 0.72);
}

.button-secondary:hover {
  color: var(--ink);
  border-color: rgba(29, 98, 232, 0.3);
  background: #fff;
  transform: translateY(-1px);
}

.hero-note {
  display: flex;
  align-items: center;
  gap: 9px;
  margin: 18px 0 0;
  color: #65728b;
  font-size: 0.92rem;
}

.hero-note::before {
  width: 17px;
  height: 17px;
  flex: 0 0 auto;
  border: 2px solid var(--teal);
  border-radius: 50%;
  box-shadow: inset 0 0 0 4px #f8fbff;
  background: var(--teal);
  content: "";
}

.hero-art {
  position: relative;
  display: grid;
  min-height: 470px;
  place-items: center;
}

.product-stage {
  position: relative;
  display: flex;
  width: min(100%, 470px);
  min-height: 470px;
  overflow: hidden;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 58px 34px 28px;
  border: 1px solid rgba(69, 131, 231, 0.2);
  border-radius: 40px;
  background:
    radial-gradient(circle at 78% 18%, rgba(51, 223, 198, 0.22), transparent 13rem),
    radial-gradient(circle at 15% 90%, rgba(71, 127, 255, 0.22), transparent 14rem),
    linear-gradient(150deg, rgba(255, 255, 255, 0.94), rgba(238, 246, 255, 0.88));
  box-shadow: 0 34px 80px rgba(25, 71, 148, 0.17);
  isolation: isolate;
}

.product-stage::before {
  position: absolute;
  inset: 14px;
  z-index: -1;
  border: 1px solid rgba(255, 255, 255, 0.85);
  border-radius: 30px;
  content: "";
}

.stage-glow {
  position: absolute;
  top: 88px;
  width: 235px;
  height: 235px;
  border-radius: 42%;
  background: linear-gradient(145deg, rgba(61, 127, 255, 0.3), rgba(30, 219, 185, 0.25));
  filter: blur(2px);
  transform: rotate(7deg);
}

.stage-label {
  position: absolute;
  top: 27px;
  left: 29px;
  display: flex;
  align-items: center;
  gap: 8px;
  color: #344767;
  font-size: 0.82rem;
  font-weight: 750;
}

.live-dot {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--teal);
  box-shadow: 0 0 0 5px rgba(9, 182, 170, 0.12);
}

.app-icon {
  position: relative;
  z-index: 2;
  width: min(54%, 210px);
  height: auto;
  border-radius: 28%;
  box-shadow: 0 32px 62px rgba(6, 39, 102, 0.27);
}

.stage-copy {
  position: relative;
  z-index: 2;
  display: grid;
  gap: 2px;
  margin-top: 20px;
  text-align: center;
}

.stage-copy strong { font-size: 1.18rem; }
.stage-copy span { color: var(--muted); font-size: 0.9rem; }

.stage-metrics {
  position: relative;
  z-index: 2;
  display: grid;
  width: 100%;
  grid-template-columns: repeat(3, 1fr);
  gap: 6px;
  margin-top: 22px;
  padding-top: 18px;
  border-top: 1px solid rgba(31, 89, 181, 0.12);
  color: #61708a;
  font-size: 0.72rem;
  line-height: 1.35;
  text-align: center;
}

.stage-metrics strong {
  display: block;
  color: var(--ink);
  font-size: 0.9rem;
}

.proof-strip {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  overflow: hidden;
  margin: 0 0 92px;
  border: 1px solid var(--line);
  border-radius: 24px;
  background: var(--line);
  box-shadow: 0 16px 45px rgba(35, 78, 149, 0.08);
}

.proof-item {
  padding: 26px;
  background: rgba(255, 255, 255, 0.86);
}

.proof-item strong { display: block; font-size: 1.2rem; }
.proof-item span { color: var(--muted); }

.section { padding: 34px 0 100px; }

.section-heading { max-width: 720px; margin-bottom: 34px; }
.section-heading h2 { margin: 0; font-size: clamp(2rem, 4vw, 3.25rem); }
.section-heading p { color: var(--muted); font-size: 1.08rem; }

.feature-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
}

.feature-card {
  min-height: 220px;
  padding: 25px;
  border: 1px solid var(--line);
  border-radius: 24px;
  background: var(--surface);
  box-shadow: var(--shadow-soft);
}

.feature-icon {
  display: grid;
  width: 48px;
  height: 48px;
  place-items: center;
  border-radius: 15px;
  color: #074e63;
  font-size: 1.35rem;
  font-weight: 850;
}

.feature-icon-words { background: linear-gradient(145deg, #e4efff, #dffaff); }
.feature-icon-review { color: #0a726c; background: linear-gradient(145deg, #d7faf4, #e9fff8); }
.feature-icon-practice { color: #5e42c9; background: linear-gradient(145deg, #eee8ff, #e0edff); }
.feature-icon-progress { color: #ad5a0a; background: linear-gradient(145deg, #fff1d7, #fff9eb); }

.feature-card h3 { margin: 20px 0 8px; font-size: 1.2rem; }
.feature-card p { margin: 0; color: var(--muted); }

.showcase {
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(300px, 0.65fr);
  overflow: hidden;
  align-items: center;
  margin: 0 0 100px;
  border: 1px solid rgba(35, 87, 178, 0.2);
  border-radius: 34px;
  background: #061b58;
  box-shadow: 0 32px 85px rgba(6, 32, 91, 0.22);
}

.showcase > img {
  display: block;
  width: 100%;
  height: 100%;
  min-height: 390px;
  object-fit: cover;
  object-position: 48% center;
}

.showcase-copy {
  align-self: stretch;
  padding: clamp(32px, 5vw, 58px);
  color: #fff;
  background:
    radial-gradient(circle at 100% 0%, rgba(0, 231, 231, 0.2), transparent 17rem),
    linear-gradient(145deg, rgba(5, 29, 88, 0.96), rgba(7, 45, 121, 0.98));
}

.showcase-copy .eyebrow { color: #75f4e9; }
.showcase-copy h2 { margin: 0; font-size: clamp(2rem, 3.6vw, 3.1rem); }
.showcase-copy > p:not(.eyebrow) { color: #c9d8f6; }

.learning-steps {
  display: grid;
  gap: 10px;
  margin-top: 28px;
}

.learning-steps span {
  display: flex;
  align-items: center;
  gap: 13px;
  padding: 11px 14px;
  border: 1px solid rgba(255, 255, 255, 0.13);
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.07);
}

.learning-steps strong { color: #62e7dc; font-size: 0.78rem; letter-spacing: 0.08em; }

.cta {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: 28px;
  margin: 18px 0 90px;
  padding: clamp(30px, 5vw, 58px);
  border: 1px solid rgba(28, 98, 232, 0.15);
  border-radius: var(--radius);
  background:
    radial-gradient(circle at 90% 10%, rgba(25, 218, 189, 0.24), transparent 17rem),
    linear-gradient(135deg, rgba(226, 238, 255, 0.92), rgba(236, 255, 251, 0.92));
  box-shadow: var(--shadow);
}

.cta h2 { margin: 0; font-size: clamp(1.8rem, 4vw, 2.8rem); }
.cta p { margin: 10px 0 0; color: var(--muted); }

.legal-hero { padding: 66px 0 28px; }
.legal-hero h1 { max-width: 900px; font-size: clamp(2.7rem, 6vw, 4.8rem); }
.legal-hero p { max-width: 700px; color: var(--muted); font-size: 1.12rem; }

.legal-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 250px;
  gap: 64px;
  align-items: start;
  padding: 24px 0 100px;
}

.legal-content {
  padding: clamp(24px, 5vw, 54px);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.9);
  box-shadow: var(--shadow);
}

.legal-content h2 { margin: 2.2em 0 0.45em; font-size: 1.55rem; }
.legal-content h2:first-child { margin-top: 0; }
.legal-content h3 { margin: 1.5em 0 0.35em; font-size: 1.08rem; letter-spacing: -0.01em; }
.legal-content p,
.legal-content li { color: #35435d; }
.legal-content li + li { margin-top: 0.45rem; }

.legal-nav {
  position: sticky;
  top: 104px;
  padding: 20px;
  border: 1px solid var(--line);
  border-radius: 20px;
  background: rgba(255, 255, 255, 0.75);
}
.legal-nav strong { display: block; margin-bottom: 10px; }
.legal-nav a { display: block; padding: 6px 0; text-decoration: none; }

.notice {
  padding: 18px 20px;
  border-left: 4px solid var(--teal);
  border-radius: 8px 18px 18px 8px;
  background: var(--teal-soft);
}

.site-footer {
  border-top: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.65);
}

.footer-inner {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 30px;
  padding: 38px 0 44px;
}

.footer-inner p { max-width: 520px; margin: 8px 0 0; color: var(--muted); }
.footer-links { display: flex; flex-wrap: wrap; gap: 18px; }
.studio-mark {
  width: 112px;
  height: 112px;
  border-radius: 24px;
  object-fit: cover;
  box-shadow: 0 12px 32px rgba(28, 51, 100, 0.1);
}

@media (max-width: 940px) {
  .hero { grid-template-columns: 1fr; min-height: auto; padding-top: 62px; }
  .hero-content { max-width: 760px; }
  .hero-art { min-height: 470px; }
  .product-stage { width: min(100%, 620px); }
  .feature-grid { grid-template-columns: repeat(2, 1fr); }
  .showcase { grid-template-columns: 1fr; }
  .showcase > img { min-height: 0; aspect-ratio: 2 / 1; object-position: center; }
  .showcase-copy { display: grid; grid-template-columns: minmax(0, 1fr) minmax(230px, 0.65fr); gap: 8px 28px; }
  .showcase-copy .eyebrow { grid-column: 1 / -1; }
  .showcase-copy > p:not(.eyebrow) { margin-bottom: 0; }
  .learning-steps { grid-column: 2; grid-row: 2 / span 2; margin-top: 0; }
  .legal-layout { grid-template-columns: 1fr; gap: 24px; }
  .legal-nav { position: static; order: -1; }
}

@media (max-width: 660px) {
  .nav, .shell { width: min(100% - 28px, 1160px); }
  .nav { min-height: 68px; }
  .brand { gap: 9px; font-size: 1rem; }
  .brand img { width: 40px; height: 40px; border-radius: 11px; }
  .nav-links { gap: 13px; font-size: 0.82rem; }
  .hero { gap: 38px; padding: 50px 0 58px; }
  .hero-art { min-height: 410px; }
  .product-stage { min-height: 410px; padding: 54px 20px 24px; border-radius: 30px; }
  .stage-glow { top: 84px; width: 205px; height: 205px; }
  .app-icon { width: min(54%, 185px); }
  .stage-copy { margin-top: 16px; }
  .stage-copy strong { font-size: 1.06rem; }
  .stage-metrics { margin-top: 18px; }
  .hero-note { align-items: flex-start; }
  .proof-strip { grid-template-columns: 1fr; }
  .proof-item { padding: 20px; }
  .feature-grid { grid-template-columns: 1fr; }
  .showcase { border-radius: 26px; }
  .showcase > img { aspect-ratio: 2 / 1; }
  .showcase-copy { display: block; }
  .learning-steps { margin-top: 24px; }
  .cta { grid-template-columns: 1fr; }
  .legal-hero { padding-top: 50px; }
  .legal-nav {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 7px;
    padding: 18px;
  }
  .legal-nav strong { grid-column: 1 / -1; }
  .legal-nav a {
    min-width: 0;
    padding: 8px 10px;
    border-radius: 10px;
    background: rgba(232, 241, 255, 0.62);
  }
  .footer-inner { flex-direction: column; }
  .studio-mark { width: 92px; height: 92px; }
}

@media (max-width: 430px) {
  h1 { font-size: clamp(2.75rem, 14vw, 3.65rem); }
  .nav-links { gap: 10px; }
  .nav-links a:first-child { display: none; }
  .actions { display: grid; }
  .button { width: 100%; }
  .stage-metrics { grid-template-columns: 1fr 1fr; }
  .stage-metrics span:last-child { grid-column: 1 / -1; }
}

@media (prefers-reduced-motion: no-preference) {
  .button,
  .feature-card { transition: transform 180ms ease, box-shadow 180ms ease, border-color 180ms ease; }
  .feature-card:hover { transform: translateY(-4px); border-color: rgba(29, 98, 232, 0.23); box-shadow: 0 22px 54px rgba(24, 65, 133, 0.13); }
  .app-icon { animation: float 5s ease-in-out infinite; }
  @keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
  }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; }
}