:root {
  --bg: #f4fbf8;
  --bg-soft: #edf5ff;
  --ink: #17201d;
  --muted: #65736f;
  --line: rgba(24, 42, 37, 0.12);
  --panel: rgba(255, 255, 255, 0.72);
  --panel-strong: rgba(255, 255, 255, 0.9);
  --green: #9be06b;
  --green-dark: #4f9d37;
  --blue: #7fd1f4;
  --mint: #c7f4de;
  --lavender: #e2ddff;
  --peach: #ffe8d5;
  --shadow: 0 24px 70px rgba(45, 65, 60, 0.18);
  --radius: 26px;
}

* {
  box-sizing: border-box;
}

html {
  min-height: 100%;
  background: var(--bg);
}

body {
  min-height: 100%;
  margin: 0;
  color: var(--ink);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.5;
  background:
    radial-gradient(circle at 10% 10%, rgba(199, 244, 222, 0.9), transparent 34rem),
    radial-gradient(circle at 86% 0%, rgba(226, 221, 255, 0.95), transparent 34rem),
    radial-gradient(circle at 72% 78%, rgba(255, 232, 213, 0.95), transparent 32rem),
    linear-gradient(135deg, #f7fff9 0%, #edf5ff 48%, #fff4ea 100%);
}

img {
  display: block;
  max-width: 100%;
}

a {
  color: inherit;
  text-decoration: none;
}

.site-header {
  width: min(1180px, calc(100% - 40px));
  margin: 0 auto;
  padding: 24px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.site-header--plain {
  border-bottom: 1px solid var(--line);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-weight: 800;
  letter-spacing: -0.02em;
}

.brand__icon {
  width: 42px;
  height: 42px;
  border-radius: 11px;
  box-shadow: 0 10px 24px rgba(24, 42, 37, 0.16);
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.55);
  backdrop-filter: blur(20px);
}

.site-nav a {
  padding: 9px 13px;
  border-radius: 999px;
  color: var(--muted);
  font-size: 0.92rem;
  font-weight: 700;
}

.site-nav a:hover,
.site-nav a[aria-current="page"] {
  color: var(--ink);
  background: var(--panel-strong);
}

.hero {
  width: min(1180px, calc(100% - 40px));
  min-height: calc(100vh - 92px);
  margin: 0 auto;
  padding: 52px 0 76px;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(360px, 0.86fr);
  align-items: center;
  gap: 64px;
}

.hero__copy {
  max-width: 670px;
}

.hero h1 {
  margin: 0;
  font-size: clamp(4rem, 10vw, 8.25rem);
  line-height: 0.88;
  letter-spacing: -0.07em;
}

.hero__lede {
  margin: 28px 0 0;
  font-size: clamp(1.55rem, 3vw, 2.65rem);
  line-height: 1.03;
  letter-spacing: -0.045em;
  font-weight: 800;
}

.hero__body {
  max-width: 35rem;
  margin: 20px 0 0;
  color: var(--muted);
  font-size: 1.08rem;
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px;
  margin: 34px 0 0;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 52px;
  padding: 12px 22px;
  border-radius: 18px;
  font-weight: 800;
  box-shadow: 0 14px 34px rgba(41, 73, 64, 0.16);
}

.button--primary {
  gap: 12px;
  min-width: 174px;
  color: #fff;
  background: #101513;
}

.button--primary:hover {
  background: #26342f;
}

.button--secondary {
  color: var(--ink);
  background: var(--panel-strong);
  border: 1px solid var(--line);
}

.button--secondary:hover {
  background: #fff;
}

.button__small {
  font-size: 0.72rem;
  line-height: 1;
  opacity: 0.72;
}

.button__icon {
  width: 24px;
  height: 24px;
  flex: 0 0 24px;
}

.button__label {
  display: grid;
  gap: 2px;
  text-align: left;
  line-height: 1.1;
}

.radical-strip {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 36px 0 0;
  padding: 0;
  list-style: none;
}

.radical-strip li {
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.7);
  border: 1px solid var(--line);
  color: #24342f;
  font-family: "Noto Serif SC", serif;
  font-size: 1.3rem;
  box-shadow: 0 10px 26px rgba(45, 65, 60, 0.1);
}

.phone-stack {
  position: relative;
  min-height: 640px;
}

.phone {
  position: absolute;
  width: min(100%, 315px);
  margin: 0;
  padding: 10px;
  border-radius: 38px;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.95), rgba(255, 255, 255, 0.58));
  border: 1px solid rgba(255, 255, 255, 0.78);
  box-shadow: var(--shadow);
}

.phone img {
  width: 100%;
  border-radius: 30px;
}

.phone--front {
  z-index: 2;
  right: 0;
  top: 0;
}

.phone--back {
  z-index: 1;
  left: 0;
  top: 112px;
  transform: scale(0.88) rotate(-5deg);
  opacity: 0.88;
}

.feature-band {
  width: min(1180px, calc(100% - 40px));
  margin: 0 auto 80px;
  padding: 42px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
  box-shadow: var(--shadow);
  backdrop-filter: blur(24px);
}

.feature-band h2 {
  max-width: 760px;
  margin: 0;
  font-size: clamp(2rem, 5vw, 4.5rem);
  line-height: 0.94;
  letter-spacing: -0.06em;
}

.feature-band > div > p {
  max-width: 50rem;
  margin: 18px 0 0;
  color: var(--muted);
  font-size: 1.05rem;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin: 34px 0 0;
}

.feature-grid article {
  padding: 22px;
  border-radius: 20px;
  background: rgba(255, 255, 255, 0.7);
  border: 1px solid var(--line);
}

.feature-grid h3 {
  margin: 0;
  font-size: 1.15rem;
  letter-spacing: -0.025em;
}

.feature-grid p {
  margin: 8px 0 0;
  color: var(--muted);
}

.doc {
  width: min(820px, calc(100% - 40px));
  margin: 0 auto;
  padding: 58px 0 76px;
}

.doc h1 {
  margin: 0;
  font-size: clamp(3rem, 8vw, 5.5rem);
  line-height: 0.92;
  letter-spacing: -0.065em;
}

.doc .doc__lede {
  max-width: 68rem;
  margin: 42px 0 34px;
  padding: 0;
  color: var(--ink);
  font-size: 1.16rem;
  font-weight: 700;
}

.doc h2 {
  margin: 34px 0 10px;
  font-size: 1.4rem;
  letter-spacing: -0.03em;
}

.doc p,
.doc li {
  color: var(--muted);
  font-size: 1.02rem;
}

.doc p {
  margin: 0 0 14px;
}

.doc ul {
  margin: 0 0 14px;
  padding-left: 22px;
}

.doc li + li {
  margin-top: 6px;
}

.doc a {
  color: var(--green-dark);
  font-weight: 800;
  border-bottom: 1px solid rgba(79, 157, 55, 0.38);
}

.doc code {
  padding: 2px 6px;
  border-radius: 7px;
  color: var(--ink);
  background: rgba(255, 255, 255, 0.78);
  border: 1px solid var(--line);
  font-size: 0.92em;
}

.doc__button {
  color: #fff !important;
  border-bottom: 0 !important;
}

.site-footer {
  width: min(1180px, calc(100% - 40px));
  margin: 0 auto;
  padding: 28px 0 46px;
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.94rem;
  font-weight: 700;
}

.site-footer a:hover {
  color: var(--ink);
}

@media (max-width: 940px) {
  .hero {
    grid-template-columns: 1fr;
    min-height: 0;
    padding-top: 34px;
    gap: 40px;
  }

  .phone-stack {
    min-height: 620px;
    max-width: 560px;
  }

  .phone--front {
    right: 4%;
  }

  .phone--back {
    left: 4%;
  }

  .feature-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 700px) {
  .site-header {
    align-items: flex-start;
    flex-direction: column;
  }

  .site-nav {
    width: 100%;
    justify-content: space-between;
    overflow-x: auto;
  }

  .hero h1 {
    font-size: clamp(3.4rem, 18vw, 5.4rem);
  }

  .hero__actions .button {
    width: 100%;
  }

  .phone-stack {
    min-height: 0;
    display: grid;
    justify-items: center;
    gap: 22px;
  }

  .phone,
  .phone--front,
  .phone--back {
    position: relative;
    inset: auto;
    width: min(84vw, 315px);
    transform: none;
    opacity: 1;
  }

  .feature-band {
    padding: 26px;
  }
}

@media (max-width: 430px) {
  .site-header,
  .hero,
  .feature-band,
  .doc,
  .site-footer {
    width: min(100% - 28px, 1180px);
  }

  .site-nav {
    gap: 2px;
    padding: 4px;
  }

  .site-nav a {
    padding: 8px 9px;
    font-size: 0.84rem;
  }

  .radical-strip li {
    width: 38px;
    height: 38px;
  }
}