:root {
  --bg: #ffffff;
  --text: #000000;
  --muted: #888888;
  --line: #e8e8e8;
  --container: 720px;
  --wide: 960px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  font-family: "DM Sans", system-ui, sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.6;
  font-weight: 400;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }
a:hover { opacity: 0.6; }

.container {
  width: 100%;
  max-width: var(--wide);
  margin: 0 auto;
  padding: 0 32px;
}

.narrow { max-width: var(--container); }

/* Typography */
.label {
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 24px;
}

.en-line {
  font-size: 0.95rem;
  color: var(--muted);
  margin-top: -8px;
  margin-bottom: 32px;
}

.en-sub {
  display: block;
  font-size: 0.8rem;
  color: var(--muted);
  font-weight: 400;
  letter-spacing: 0.02em;
}

.lead-en {
  font-size: 0.9rem;
  color: var(--muted);
  margin-top: 16px;
  max-width: 540px;
}

h1, h2, h3 {
  font-weight: 500;
  line-height: 1.15;
  letter-spacing: -0.02em;
}

h1 { font-size: clamp(2rem, 5vw, 3rem); margin-bottom: 8px; }
h2 { font-size: clamp(1.5rem, 3vw, 2rem); margin-bottom: 16px; }
h3 { font-size: 1rem; font-weight: 500; margin-bottom: 4px; }

p { color: var(--text); }

/* Button */
.btn {
  display: inline-block;
  padding: 14px 32px;
  font-size: 0.85rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  border: 1px solid var(--text);
  background: var(--text);
  color: var(--bg);
  cursor: pointer;
  transition: opacity 0.2s;
  font-family: inherit;
}
.btn:hover { opacity: 0.75; }
.btn-block { width: 100%; text-align: center; }

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: var(--bg);
  border-bottom: 1px solid var(--line);
}
.nav {
  display: flex;
  align-items: center;
  height: 64px;
  gap: 32px;
}
.brand {
  font-size: 0.9rem;
  font-weight: 500;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}
.nav-links {
  display: flex;
  gap: 32px;
  margin-left: auto;
}
.nav-links a {
  font-size: 0.85rem;
  color: var(--muted);
  letter-spacing: 0.02em;
}
.nav-links a:hover { color: var(--text); opacity: 1; }
.nav-cta { margin-left: 0; padding: 10px 20px; font-size: 0.75rem; }
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 6px;
  background: none;
  border: 0;
  cursor: pointer;
  padding: 8px;
  margin-left: auto;
}
.nav-toggle span {
  display: block;
  width: 20px;
  height: 1px;
  background: var(--text);
}

/* Hero */
.hero { padding: 120px 0 100px; }
.hero-inner { max-width: var(--container); }
.lead {
  font-size: 1.05rem;
  max-width: 540px;
  margin: 32px 0;
  line-height: 1.7;
}

/* Stats */
.stats { border-block: 1px solid var(--line); }
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
  padding: 64px 32px;
  max-width: var(--wide);
  margin: 0 auto;
}
.stat strong {
  display: block;
  font-size: 2.5rem;
  font-weight: 500;
  letter-spacing: -0.03em;
  margin-bottom: 8px;
}
.stat > span:first-of-type {
  display: block;
  font-size: 0.85rem;
  margin-bottom: 2px;
}
.stat .en-sub { font-size: 0.75rem; }

/* Sections */
.section { padding: 100px 0; }
.section-alt { background: #fafafa; }
.section-head { margin-bottom: 64px; max-width: var(--container); }

/* List grid */
.list-grid { display: grid; gap: 0; border-top: 1px solid var(--line); }
.list-item {
  display: grid;
  grid-template-columns: 48px 1fr;
  gap: 24px;
  padding: 32px 0;
  border-bottom: 1px solid var(--line);
  align-items: start;
}
.list-item .num {
  font-size: 0.75rem;
  color: var(--muted);
  letter-spacing: 0.06em;
  padding-top: 2px;
}
.list-item p:not(.en-sub) {
  font-size: 0.9rem;
  color: var(--muted);
  margin-top: 8px;
  max-width: 480px;
}

/* About */
.plain-list {
  list-style: none;
  margin-top: 40px;
  display: grid;
  gap: 12px;
}
.plain-list li {
  font-size: 0.95rem;
  padding-left: 20px;
  position: relative;
}
.plain-list li::before {
  content: "—";
  position: absolute;
  left: 0;
  color: var(--muted);
}

/* Three col */
.three-col {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 48px;
  border-top: 1px solid var(--line);
  padding-top: 48px;
}
.three-col p:not(.en-sub) {
  font-size: 0.9rem;
  color: var(--muted);
  margin-top: 12px;
}

/* Contact */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: start;
}
.contact-desc { margin: 24px 0 8px; max-width: 360px; }
.contact-info {
  font-style: normal;
  margin-top: 40px;
  font-size: 0.9rem;
  line-height: 1.8;
}
.contact-info a { border-bottom: 1px solid var(--line); }
.contact-form { display: grid; gap: 24px; }
.field label {
  display: block;
  font-size: 0.8rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  margin-bottom: 8px;
  color: var(--muted);
}
.field label .en-sub {
  display: inline;
  text-transform: none;
  letter-spacing: 0;
  margin-left: 4px;
}
.field input,
.field textarea {
  width: 100%;
  padding: 12px 0;
  border: none;
  border-bottom: 1px solid var(--line);
  background: transparent;
  font: inherit;
  color: var(--text);
  resize: vertical;
  border-radius: 0;
}
.field input:focus,
.field textarea:focus {
  outline: none;
  border-bottom-color: var(--text);
}
.form-status {
  min-height: 20px;
  font-size: 0.85rem;
  color: var(--muted);
}

/* Footer */
.site-footer {
  border-top: 1px solid var(--line);
  padding: 48px 0;
}
.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
}
.footer-brand {
  font-size: 0.85rem;
  font-weight: 500;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}
.footer-copy {
  font-size: 0.8rem;
  color: var(--muted);
}

/* Reveal */
.reveal {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.reveal.in { opacity: 1; transform: none; }

/* Responsive */
@media (max-width: 768px) {
  .nav-links, .nav-cta { display: none; }
  .nav-toggle { display: flex; }
  .nav-links.open {
    display: flex;
    flex-direction: column;
    gap: 0;
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    background: var(--bg);
    border-bottom: 1px solid var(--line);
    padding: 16px 32px 24px;
  }
  .nav-links.open a { padding: 12px 0; border-bottom: 1px solid var(--line); }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .three-col { grid-template-columns: 1fr; gap: 40px; }
  .contact-grid { grid-template-columns: 1fr; gap: 48px; }
  .hero { padding: 80px 0 64px; }
  .section { padding: 64px 0; }
  .footer-inner { flex-direction: column; align-items: flex-start; }
}