:root {
  --bg: #f5f0e8;
  --paper: rgba(255, 252, 247, 0.76);
  --ink: #171412;
  --muted: #655b53;
  --line: rgba(23, 20, 18, 0.12);
  --accent: #b35c2e;
  --shadow: 0 20px 60px rgba(23, 20, 18, 0.08);
  --serif: "Iowan Old Style", "Palatino Linotype", "Book Antiqua", Georgia, serif;
  --sans: "Avenir Next", "Helvetica Neue", Helvetica, sans-serif;
  --mono: "SFMono-Regular", Menlo, Monaco, Consolas, "Liberation Mono", monospace;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--ink);
  background:
    radial-gradient(circle at top left, rgba(179, 92, 46, 0.14), transparent 32%),
    radial-gradient(circle at bottom right, rgba(23, 20, 18, 0.06), transparent 28%),
    linear-gradient(180deg, #fbf8f3 0%, var(--bg) 100%);
  font-family: var(--sans);
  line-height: 1.55;
}

a {
  color: inherit;
  text-decoration-color: rgba(179, 92, 46, 0.55);
  text-underline-offset: 0.18em;
}

a:hover {
  text-decoration-color: var(--accent);
}

a:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 4px;
}

.page-shell {
  width: min(100%, 74rem);
  margin: 0 auto;
  padding: 1.2rem;
}

.hardset-main {
  min-height: calc(100vh - 2.4rem);
  display: grid;
  align-items: center;
}

.site-header,
.site-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.site-header {
  padding: 0.4rem 0 2rem;
}

.site-footer {
  padding: 2rem 0 0.5rem;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.95rem;
}

.site-footer p {
  margin: 0;
}

.brand,
.mono {
  font-family: var(--mono);
  letter-spacing: 0.04em;
}

.brand {
  font-size: 0.95rem;
  text-decoration: none;
}

.site-nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 1rem;
  font-size: 0.95rem;
}

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

main {
  display: grid;
  gap: 1.5rem;
}

section {
  position: relative;
  overflow: hidden;
  padding: clamp(1.5rem, 3vw, 2.5rem);
  border: 1px solid var(--line);
  border-radius: 1.6rem;
  background: var(--paper);
  backdrop-filter: blur(12px);
  box-shadow: var(--shadow);
}

.hero {
  padding-top: clamp(2rem, 5vw, 4rem);
}

.hero::after,
.story::after,
.app-section::after {
  content: "";
  position: absolute;
  inset: auto auto -3.5rem -3rem;
  width: 10rem;
  height: 10rem;
  border-radius: 50%;
  background: rgba(179, 92, 46, 0.08);
  filter: blur(4px);
}

.eyebrow {
  margin: 0 0 0.8rem;
  color: var(--accent);
  font-family: var(--mono);
  font-size: 0.8rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.hero-grid,
.story-grid {
  display: grid;
  gap: 1.5rem;
}

h1,
h2 {
  margin: 0;
  font-family: var(--serif);
  font-weight: 600;
  line-height: 0.95;
  letter-spacing: -0.03em;
}

h1 {
  font-size: clamp(3.4rem, 10vw, 7.2rem);
  max-width: 10ch;
}

h2 {
  font-size: clamp(2.2rem, 7vw, 4.4rem);
}

.lead,
.story-grid p,
.app-summary,
.app-meta dd,
.kanji-note {
  max-width: 36rem;
  margin: 0;
  font-size: clamp(1.05rem, 2vw, 1.22rem);
  color: var(--muted);
}

.lead {
  margin-top: 1.2rem;
}

.kanji-card,
.app-card {
  border: 1px solid var(--line);
  border-radius: 1.2rem;
  background: rgba(255, 255, 255, 0.45);
}

.kanji-card {
  display: grid;
  align-content: start;
  gap: 0.7rem;
  padding: 1.2rem;
}

.kanji {
  margin: 0;
  font-family: var(--serif);
  font-size: clamp(3rem, 9vw, 5.4rem);
  line-height: 1;
}

.section-intro {
  display: grid;
  gap: 0.25rem;
  margin-bottom: 1.8rem;
}

.story-grid p + p {
  border-top: 1px solid var(--line);
  padding-top: 1rem;
}

.app-card {
  display: grid;
  gap: 1.5rem;
  padding: 1.4rem;
}

.app-meta {
  display: grid;
  gap: 1rem;
  margin: 0;
}

.app-meta div {
  padding-top: 1rem;
  border-top: 1px solid var(--line);
}

.app-meta dt {
  margin-bottom: 0.4rem;
  font-family: var(--mono);
  font-size: 0.86rem;
  color: var(--accent);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.app-meta dd {
  margin: 0;
}

.hardset-page {
  max-width: 46rem;
  margin: 0 auto;
}

.hardset-block {
  display: grid;
  gap: 1rem;
  margin-top: 2rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--line);
}

.hardset-block h2 {
  font-size: clamp(1.6rem, 4vw, 2.3rem);
}

.hardset-block p,
.hardset-meta p {
  margin: 0;
  color: var(--muted);
  font-size: clamp(1rem, 1.8vw, 1.12rem);
}

.hardset-meta {
  display: grid;
  gap: 0.7rem;
  margin-top: 2rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--line);
}

.reveal {
  opacity: 0;
  transform: translateY(14px);
  animation: rise 0.75s ease forwards;
}

.story.reveal {
  animation-delay: 0.12s;
}

.app-section.reveal {
  animation-delay: 0.24s;
}

@keyframes rise {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (min-width: 46rem) {
  .page-shell {
    padding: 1.8rem;
  }

  .hero-grid {
    grid-template-columns: minmax(0, 1.6fr) minmax(16rem, 0.9fr);
    align-items: start;
  }

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

  .story-grid p + p {
    border-top: 0;
    border-left: 1px solid var(--line);
    padding-top: 0;
    padding-left: 2rem;
  }

  .app-card {
    grid-template-columns: minmax(0, 1.3fr) minmax(0, 1fr);
    align-items: start;
  }

  .app-meta div:first-child {
    padding-top: 0;
    border-top: 0;
  }
}

@media (max-width: 38rem) {
  .site-header,
  .site-footer {
    align-items: flex-start;
    flex-direction: column;
  }

  .site-nav {
    justify-content: flex-start;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  .reveal {
    opacity: 1;
    transform: none;
    animation: none;
  }
}