:root {
  --paper: #f4f0e8;
  --ink: #1f2523;
  --muted: #66706c;
  --line: rgba(31, 37, 35, 0.16);
  --green: #255f4b;
  --blue: #2d5f83;
  --ochre: #b36a2e;
  --white: #fffdf8;
  --shadow: 0 24px 80px rgba(34, 41, 38, 0.12);
  --radius: 8px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background:
    linear-gradient(120deg, rgba(37, 95, 75, 0.08), transparent 32rem),
    linear-gradient(180deg, rgba(45, 95, 131, 0.07), transparent 38rem),
    var(--paper);
  color: var(--ink);
  font-family: Avenir Next, Helvetica Neue, Helvetica, sans-serif;
  letter-spacing: 0;
}

a {
  color: inherit;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.2rem;
  min-height: 72px;
  padding: 0 5vw;
  border-bottom: 1px solid var(--line);
  background: rgba(244, 240, 232, 0.86);
  backdrop-filter: blur(18px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
  font-weight: 700;
}

.brand-mark {
  display: grid;
  width: 42px;
  height: 42px;
  place-items: center;
  border: 1px solid var(--ink);
  border-radius: 50%;
  font-family: Georgia, Times New Roman, serif;
  font-size: 0.9rem;
}

.brand-text {
  font-size: 0.98rem;
}

.nav {
  display: flex;
  align-items: center;
  gap: clamp(0.9rem, 2vw, 1.8rem);
  color: var(--muted);
  font-size: 0.95rem;
}

.nav a {
  text-decoration: none;
}

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

.language-switch {
  display: inline-flex;
  align-items: center;
  gap: 0.2rem;
  padding: 0.2rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(255, 253, 248, 0.56);
}

.language-option {
  min-width: 44px;
  min-height: 32px;
  padding: 0 0.7rem;
  border: 0;
  border-radius: 999px;
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  font: inherit;
  font-size: 0.82rem;
  font-weight: 800;
}

.language-option.is-active {
  background: var(--ink);
  color: var(--white);
}

.language-option:focus-visible,
a:focus-visible,
.button:focus-visible {
  outline: 3px solid rgba(45, 95, 131, 0.34);
  outline-offset: 3px;
}

main {
  width: min(1180px, 90vw);
  margin: 0 auto;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(340px, 0.82fr);
  gap: clamp(2.5rem, 6vw, 6rem);
  align-items: center;
  min-height: calc(100vh - 72px);
  padding: clamp(3rem, 6vw, 6.5rem) 0;
}

.eyebrow,
.section-label,
.focus-index {
  margin: 0;
  color: var(--green);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  margin-bottom: 1rem;
  font-family: Georgia, Times New Roman, serif;
  font-size: clamp(4rem, 14vw, 9.5rem);
  font-weight: 500;
  line-height: 0.88;
}

.hero-lead {
  max-width: 650px;
  margin-bottom: 2rem;
  color: #3d4642;
  font-family: Georgia, Times New Roman, serif;
  font-size: clamp(1.35rem, 2.6vw, 2.2rem);
  line-height: 1.22;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0 1.2rem;
  border: 1px solid var(--ink);
  border-radius: 999px;
  text-decoration: none;
  font-weight: 700;
}

.button.primary {
  background: var(--ink);
  color: var(--white);
}

.button.secondary {
  background: transparent;
}

.button:hover {
  transform: translateY(-1px);
}

.signal-panel {
  position: relative;
  overflow: hidden;
  min-height: 420px;
  border: 1px solid rgba(31, 37, 35, 0.22);
  border-radius: var(--radius);
  background:
    linear-gradient(135deg, rgba(255, 253, 248, 0.92), rgba(242, 236, 224, 0.76)),
    repeating-linear-gradient(90deg, transparent, transparent 38px, rgba(31, 37, 35, 0.04) 39px);
  box-shadow: var(--shadow);
}

#signalCanvas {
  display: block;
  width: 100%;
  height: 100%;
  min-height: 420px;
}

.signal-caption {
  position: absolute;
  right: 1rem;
  bottom: 1rem;
  left: 1rem;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.5rem;
}

.signal-caption span {
  padding: 0.65rem 0.7rem;
  border: 1px solid rgba(31, 37, 35, 0.14);
  border-radius: 999px;
  background: rgba(255, 253, 248, 0.72);
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 700;
  text-align: center;
}

.section {
  display: grid;
  grid-template-columns: 180px minmax(0, 1fr);
  gap: clamp(1.5rem, 5vw, 4rem);
  padding: clamp(3rem, 7vw, 6.5rem) 0;
  border-top: 1px solid var(--line);
}

.section h2 {
  max-width: 860px;
  margin-bottom: 1rem;
  font-family: Georgia, Times New Roman, serif;
  font-size: clamp(2rem, 5vw, 4.2rem);
  font-weight: 500;
  line-height: 1.02;
}

.section p {
  max-width: 760px;
  color: var(--muted);
  font-size: clamp(1rem, 1.6vw, 1.18rem);
  line-height: 1.75;
}

.focus-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  margin-top: 2rem;
  border: 1px solid var(--line);
  background: var(--line);
}

.note-list {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.7rem;
  margin-top: 2rem;
}

.note-list span {
  display: flex;
  align-items: center;
  min-height: 64px;
  padding: 0.9rem 1rem;
  border: 1px solid var(--line);
  border-left: 4px solid var(--blue);
  border-radius: var(--radius);
  background: rgba(255, 253, 248, 0.58);
  color: #3d4642;
  font-weight: 800;
  line-height: 1.35;
}

.focus-item {
  min-height: 250px;
  padding: clamp(1.15rem, 3vw, 2rem);
  background: rgba(255, 253, 248, 0.62);
}

.focus-item h3 {
  margin: 2.4rem 0 0.8rem;
  font-family: Georgia, Times New Roman, serif;
  font-size: clamp(1.45rem, 2vw, 2rem);
  font-weight: 500;
}

.focus-item p {
  font-size: 0.98rem;
  line-height: 1.6;
}

.contact-body {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(320px, 0.5fr);
  gap: 2rem;
  align-items: start;
}

.contact-panel {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
  align-items: start;
}

.contact-links {
  display: grid;
  gap: 0.8rem;
  padding-top: 0.3rem;
}

.contact-links a,
.contact-links span {
  display: block;
  padding: 1rem 1.1rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(255, 253, 248, 0.58);
  text-decoration: none;
  font-weight: 700;
}

.qr-block {
  margin: 0;
  padding: 0.8rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(255, 253, 248, 0.72);
  width: min(220px, 100%);
}

.qr-block img {
  display: block;
  width: 100%;
  aspect-ratio: 1;
  border-radius: 4px;
}

.qr-block figcaption {
  margin-top: 0.65rem;
  color: var(--muted);
  font-size: 0.82rem;
  font-weight: 700;
  line-height: 1.35;
}

.site-footer {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  width: min(1180px, 90vw);
  margin: 0 auto;
  padding: 2rem 0 3rem;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.9rem;
}

@media (max-width: 860px) {
  .site-header {
    min-height: 64px;
  }

  .nav {
    gap: 0.8rem;
    font-size: 0.86rem;
  }

  .language-switch {
    margin-left: auto;
  }

  .brand-text {
    display: none;
  }

  .hero {
    grid-template-columns: 1fr;
    min-height: auto;
  }

  .signal-panel,
  #signalCanvas {
    min-height: 320px;
  }

  .signal-panel {
    padding-bottom: 1rem;
  }

  .signal-caption {
    position: static;
    padding: 0 0.85rem;
  }

  .section,
  .contact-body {
    grid-template-columns: 1fr;
  }

  .section-label {
    margin-bottom: -0.5rem;
  }

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

  .note-list,
  .contact-panel {
    grid-template-columns: 1fr;
  }

  .qr-block {
    width: min(260px, 100%);
  }

  .focus-item {
    min-height: 190px;
  }

  .site-footer {
    flex-direction: column;
  }
}

@media (max-width: 520px) {
  main,
  .site-footer {
    width: min(100% - 2rem, 1180px);
  }

  .site-header {
    flex-wrap: wrap;
    align-content: center;
    gap: 0.55rem 0.8rem;
    min-height: 78px;
    padding: 0 1rem;
  }

  .nav {
    order: 3;
    width: 100%;
    justify-content: space-between;
  }

  .hero {
    padding-top: 2.5rem;
  }

  .hero-actions {
    display: grid;
  }

  .button {
    width: 100%;
  }

  .signal-caption {
    grid-template-columns: 1fr;
  }
}

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

  .button:hover {
    transform: none;
  }
}