/* ─── Hajime — design system ─── */

:root {
  /* Palette — warm rice paper + sumi black + Kyokushin red */
  --bg: #F5EFE6;
  --bg-alt: #FAF7F2;
  --bg-paper: #ECE3D2;
  --ink: #0C0C0C;
  --ink-soft: #3A3A37;
  --ink-muted: #7A766E;
  --hi: #C8102E;
  --hi-dark: #9A0C24;
  --line: #1A1A1A;
  --line-soft: #DDD2BE;

  /* Typography */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, system-ui, sans-serif;
  --font-jp: 'Noto Serif JP', 'Hiragino Mincho ProN', 'Yu Mincho', serif;

  --max: 1200px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font-sans);
  font-feature-settings: "ss01", "cv11";
  background: var(--bg);
  color: var(--ink);
  line-height: 1.6;
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

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

a {
  color: var(--ink);
  text-decoration: none;
  border-bottom: 1px solid currentColor;
  transition: color 0.18s ease, border-color 0.18s ease;
}
a:hover { color: var(--hi); }

p { margin: 0 0 16px; }
ul { margin: 0 0 16px; padding-left: 22px; }
li { margin-bottom: 6px; }

.container {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 32px;
}

/* ─── Header ─── */
header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(245, 239, 230, 0.85);
  backdrop-filter: saturate(160%) blur(20px);
  -webkit-backdrop-filter: saturate(160%) blur(20px);
  border-bottom: 1px solid var(--line-soft);
}
header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 17px;
  font-weight: 700;
  letter-spacing: -0.015em;
  border: 0;
}
.brand:hover { color: var(--ink); }
.brand-mark {
  width: 32px;
  height: 32px;
  border-radius: 7px;
}
nav {
  display: flex;
  gap: 32px;
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.06em;
}
nav a {
  border: 0;
  color: var(--ink-soft);
  text-transform: uppercase;
}
nav a:hover { color: var(--hi); border: 0; }

/* ─── Hero ─── */
.hero {
  position: relative;
  padding: 120px 0 80px;
  overflow: hidden;
}
.hero::before {
  content: "始";
  position: absolute;
  font-family: var(--font-jp);
  font-weight: 900;
  font-size: 720px;
  line-height: 0.85;
  color: var(--ink);
  top: 50%;
  right: -80px;
  transform: translateY(-50%);
  z-index: 0;
  opacity: 0.04;
  pointer-events: none;
  user-select: none;
}
.hero-grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1.15fr 1fr;
  gap: 80px;
  align-items: center;
}
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 14px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--hi);
  margin-bottom: 36px;
}
.eyebrow::before {
  content: "";
  display: block;
  width: 36px;
  height: 1px;
  background: var(--hi);
}
.eyebrow .jp {
  font-family: var(--font-jp);
  font-weight: 700;
  font-size: 14px;
  letter-spacing: 0;
  color: var(--hi);
}
.hero-title {
  font-family: var(--font-sans);
  font-size: clamp(64px, 9.5vw, 128px);
  line-height: 0.95;
  letter-spacing: -0.045em;
  font-weight: 800;
  margin: 0;
}
.hero-jp {
  font-family: var(--font-jp);
  font-weight: 900;
  font-size: clamp(28px, 3.5vw, 40px);
  color: var(--hi);
  margin: 8px 0 28px;
  letter-spacing: 0.04em;
}
.hero-lede {
  font-size: 21px;
  line-height: 1.45;
  color: var(--ink-soft);
  margin: 0 0 40px;
  max-width: 540px;
}
.hero-cta {
  display: inline-flex;
  align-items: center;
  gap: 16px;
  font-size: 13px;
  font-weight: 500;
  color: var(--ink-soft);
  letter-spacing: 0.05em;
  text-transform: uppercase;
}
.hero-cta strong { color: var(--ink); font-weight: 700; }
.hero-cta .sep {
  display: inline-block;
  width: 24px;
  height: 1px;
  background: var(--ink-muted);
}
.hero-image {
  width: 100%;
  max-width: 380px;
  justify-self: end;
  position: relative;
}
.hero-image img {
  border-radius: 44px;
  box-shadow:
    0 80px 120px -50px rgba(12, 12, 12, 0.4),
    0 24px 40px -12px rgba(12, 12, 12, 0.16);
}
.hero-image::after {
  content: "";
  position: absolute;
  inset: -12px;
  border: 1px solid var(--ink);
  border-radius: 56px;
  opacity: 0.06;
  pointer-events: none;
}

/* ─── Sections ─── */
section.section {
  padding: 110px 0;
  border-top: 1px solid var(--line);
  position: relative;
}
.section-header {
  display: grid;
  grid-template-columns: 96px 1fr;
  gap: 40px;
  align-items: baseline;
  margin-bottom: 64px;
}
.section-num {
  font-family: var(--font-jp);
  font-weight: 900;
  font-size: 56px;
  line-height: 1;
  color: var(--hi);
  letter-spacing: -0.03em;
}
.section-title {
  font-size: clamp(40px, 5.5vw, 64px);
  line-height: 1.02;
  font-weight: 800;
  letter-spacing: -0.025em;
  margin: 0;
}
.section-content { margin-left: 136px; max-width: 920px; }

/* ─── Features (stats + copy) ─── */
.features {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 56px;
}
.feature {
  border-top: 2px solid var(--ink);
  padding-top: 24px;
}
.feature-stat {
  font-family: var(--font-jp);
  font-weight: 900;
  font-size: 64px;
  line-height: 1;
  color: var(--hi);
  display: block;
  margin-bottom: 20px;
  letter-spacing: -0.04em;
}
.feature h3 {
  font-size: 21px;
  font-weight: 700;
  letter-spacing: -0.015em;
  margin: 0 0 12px;
}
.feature p {
  font-size: 16px;
  line-height: 1.6;
  color: var(--ink-soft);
  margin: 0;
}

/* ─── Lead text ─── */
.lead-text p {
  font-size: 22px;
  line-height: 1.55;
  color: var(--ink);
  margin: 0 0 28px;
  font-weight: 400;
}
.lead-text p:last-child { margin-bottom: 0; }
.lead-text strong {
  font-weight: 700;
  background: linear-gradient(transparent 62%, rgba(200, 16, 46, 0.18) 62%);
  padding: 0 4px;
}
.lead-text em {
  font-style: italic;
  font-weight: 600;
  color: var(--hi);
  font-feature-settings: "ss01";
}

/* ─── Screenshots ─── */
.screenshots {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.screenshots img {
  border-radius: 28px;
  box-shadow:
    0 50px 80px -40px rgba(12, 12, 12, 0.35),
    0 12px 24px -8px rgba(12, 12, 12, 0.12);
  transition: transform 0.4s cubic-bezier(0.2, 0.8, 0.2, 1);
}
.screenshots img:hover {
  transform: translateY(-6px);
}

/* ─── Audience ─── */
.audience {
  border-top: 2px solid var(--ink);
  display: grid;
  grid-template-columns: 1fr 1fr;
}
.audience-item {
  padding: 32px 0;
  border-bottom: 1px solid var(--line);
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 32px;
  align-items: baseline;
}
.audience-item:nth-child(odd) {
  border-right: 1px solid var(--line);
  padding-right: 48px;
}
.audience-item:nth-child(even) { padding-left: 48px; }
.audience-item:nth-last-child(-n+2) { border-bottom: 2px solid var(--ink); }
.audience-item strong {
  font-size: 18px;
  font-weight: 700;
  letter-spacing: -0.015em;
}
.audience-item span {
  color: var(--ink-soft);
  font-size: 16px;
  line-height: 1.55;
}

/* ─── Footer ─── */
footer {
  padding: 72px 0 56px;
  border-top: 2px solid var(--ink);
  position: relative;
  margin-top: 0;
  overflow: hidden;
}
footer::before {
  content: "押忍";
  position: absolute;
  font-family: var(--font-jp);
  font-weight: 900;
  font-size: 240px;
  line-height: 0.8;
  color: var(--ink);
  bottom: -50px;
  right: 32px;
  z-index: 0;
  opacity: 0.05;
  pointer-events: none;
  user-select: none;
}
footer .container {
  position: relative;
  z-index: 1;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 16px;
  font-size: 13px;
  color: var(--ink-soft);
  letter-spacing: 0.02em;
}
footer a {
  border-bottom: 1px solid var(--line-soft);
  color: var(--ink-soft);
}
footer a:hover { color: var(--hi); border-color: var(--hi); }

/* ─── Support page ─── */
.support-intro {
  padding: 0 0 32px;
  max-width: 800px;
}
.intro-lede {
  font-size: 22px;
  line-height: 1.5;
  color: var(--ink);
  margin: 0;
  font-weight: 400;
}
.support-section {
  padding: 24px 0 80px;
}
.support-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}
.support-card {
  border-top: 2px solid var(--ink);
  padding-top: 24px;
  display: flex;
  flex-direction: column;
}
.support-card .num {
  font-family: var(--font-jp);
  font-weight: 900;
  font-size: 56px;
  line-height: 1;
  color: var(--hi);
  margin-bottom: 20px;
  letter-spacing: -0.04em;
}
.support-card h3 {
  font-size: 22px;
  font-weight: 700;
  letter-spacing: -0.015em;
  margin: 0 0 12px;
}
.support-card p {
  font-size: 16px;
  line-height: 1.6;
  color: var(--ink-soft);
  margin: 0 0 24px;
  flex: 1;
}
.support-cta {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 15px;
  font-weight: 600;
  color: var(--ink);
  border-bottom: 2px solid var(--ink);
  padding-bottom: 4px;
  align-self: flex-start;
  letter-spacing: -0.005em;
  transition: color 0.18s ease, border-color 0.18s ease, gap 0.18s ease;
}
.support-cta::after {
  content: "→";
  display: inline-block;
  transition: transform 0.18s ease;
}
.support-cta:hover {
  color: var(--hi);
  border-color: var(--hi);
}
.support-cta:hover::after { transform: translateX(4px); }

/* ─── Privacy page ─── */
.privacy-hero {
  padding: 100px 0 56px;
}
.privacy-hero .eyebrow { margin-bottom: 28px; }
.privacy-hero h1 {
  font-size: clamp(48px, 7vw, 88px);
  line-height: 1.02;
  letter-spacing: -0.035em;
  font-weight: 800;
  margin: 0 0 20px;
}
.privacy-hero .updated {
  font-size: 13px;
  color: var(--ink-muted);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-weight: 500;
}
.privacy-content section {
  padding: 36px 0;
  border-top: 1px solid var(--line-soft);
  display: grid;
  grid-template-columns: 96px 1fr;
  gap: 40px;
  align-items: baseline;
}
.privacy-content section:first-of-type { border-top: 2px solid var(--ink); }
.privacy-content .privacy-num {
  font-family: var(--font-jp);
  font-weight: 900;
  font-size: 32px;
  line-height: 1;
  color: var(--hi);
}
.privacy-content .privacy-body {
  max-width: 720px;
}
.privacy-content h2 {
  font-size: 24px;
  font-weight: 700;
  letter-spacing: -0.015em;
  margin: 0 0 14px;
}
.privacy-content p, .privacy-content ul {
  font-size: 17px;
  line-height: 1.65;
  color: var(--ink);
  margin: 0 0 12px;
}
.privacy-content li { margin-bottom: 8px; }

/* ─── Mobile ─── */
@media (max-width: 880px) {
  .container { padding: 0 20px; }
  header .container { height: 56px; }
  .brand { font-size: 16px; }
  nav { gap: 20px; font-size: 12px; }

  .hero { padding: 64px 0 40px; }
  .hero::before { font-size: 360px; right: -40px; }
  .hero-grid { grid-template-columns: 1fr; gap: 48px; }
  .hero-image { max-width: 280px; margin: 0 auto; justify-self: center; }
  .hero-lede { font-size: 18px; }

  section.section { padding: 64px 0; }
  .section-header { grid-template-columns: 1fr; gap: 12px; margin-bottom: 36px; }
  .section-num { font-size: 36px; }
  .section-content { margin-left: 0; }

  .features { grid-template-columns: 1fr; gap: 36px; }
  .feature-stat { font-size: 56px; }

  .lead-text p { font-size: 19px; }

  .screenshots { grid-template-columns: repeat(2, 1fr); gap: 16px; }

  .audience { grid-template-columns: 1fr; }
  .audience-item {
    grid-template-columns: 1fr;
    gap: 6px;
    padding: 24px 0 !important;
  }
  .audience-item:nth-child(odd) { border-right: 0; padding-right: 0 !important; }
  .audience-item:nth-child(even) { padding-left: 0 !important; }

  footer { padding: 48px 0 32px; }
  footer::before { font-size: 140px; bottom: -25px; }
  footer .container { flex-direction: column; gap: 8px; }

  .privacy-hero { padding: 56px 0 32px; }
  .privacy-content section {
    grid-template-columns: 1fr;
    gap: 12px;
    padding: 28px 0;
  }
  .privacy-content .privacy-num { font-size: 24px; }

  .support-intro { padding: 0 0 24px; }
  .intro-lede { font-size: 19px; }
  .support-grid { grid-template-columns: 1fr; gap: 36px; }
  .support-card .num { font-size: 44px; }
}