:root {
  --lagoon: #0c3d3a;
  --lagoon-mid: #14635e;
  --lagoon-light: #1f8a82;
  --sand: #f2e6d4;
  --sand-deep: #e4d2b5;
  --sunset: #e36b2c;
  --sunset-hot: #f08a3a;
  --ink: #14201f;
  --muted: #4a5c59;
  --paper: #fffaf3;
  --line: rgba(20, 32, 31, 0.12);
  --shadow: 0 24px 60px rgba(12, 61, 58, 0.18);
  --radius: 18px;
  --font-display: "Syne", sans-serif;
  --font-body: "Figtree", sans-serif;
  --max: 1080px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  font-family: var(--font-body);
  background:
    radial-gradient(1200px 500px at 10% -10%, rgba(240, 138, 58, 0.18), transparent 55%),
    radial-gradient(900px 600px at 100% 0%, rgba(31, 138, 130, 0.16), transparent 50%),
    linear-gradient(180deg, #f7efe2 0%, var(--paper) 28%, #f4ebe0 100%);
  line-height: 1.55;
}

img {
  max-width: 100%;
}

a {
  color: var(--lagoon-mid);
  text-underline-offset: 0.18em;
}

a:hover {
  color: var(--sunset);
}

.skip {
  position: absolute;
  left: -999px;
  top: 0;
  background: var(--ink);
  color: white;
  padding: 0.6rem 1rem;
  z-index: 100;
}

.skip:focus {
  left: 1rem;
  top: 1rem;
}

.site-nav {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 0.85rem clamp(1rem, 4vw, 2rem);
  backdrop-filter: blur(14px);
  background: rgba(255, 250, 243, 0.82);
  border-bottom: 1px solid var(--line);
  transition: box-shadow 0.25s ease, background 0.25s ease;
}

.site-nav.is-scrolled {
  background: rgba(255, 250, 243, 0.94);
  box-shadow: 0 10px 30px rgba(12, 61, 58, 0.08);
}

.brand {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.05rem;
  letter-spacing: -0.03em;
  color: var(--ink);
  text-decoration: none;
}

.site-nav nav {
  display: none;
  gap: 1.1rem;
  margin-left: auto;
}

.site-nav nav a {
  text-decoration: none;
  color: var(--muted);
  font-weight: 600;
  font-size: 0.95rem;
}

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

.lang-switch {
  display: inline-flex;
  align-items: center;
  gap: 0.15rem;
  margin-left: auto;
  padding: 0.2rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.55);
}

.lang-switch a {
  text-decoration: none;
  color: var(--muted);
  font-weight: 700;
  font-size: 0.78rem;
  letter-spacing: 0.02em;
  padding: 0.35rem 0.55rem;
  border-radius: 999px;
}

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

.lang-switch a[aria-current="page"] {
  background: var(--lagoon);
  color: var(--sand);
}

.nav-cta {
  text-decoration: none;
  background: var(--lagoon);
  color: var(--sand);
  font-weight: 700;
  font-size: 0.9rem;
  padding: 0.55rem 0.95rem;
  border-radius: 999px;
  white-space: nowrap;
}

.nav-cta:hover {
  background: var(--lagoon-mid);
  color: white;
}

.hero {
  position: relative;
  min-height: min(88vh, 760px);
  display: grid;
  align-items: end;
  overflow: hidden;
  isolation: isolate;
}

.hero-media {
  position: absolute;
  inset: 0;
  z-index: -1;
}

.hero-media picture,
.hero-media img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 35%;
}

.hero-media::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(105deg, rgba(8, 32, 30, 0.82) 0%, rgba(12, 61, 58, 0.55) 42%, rgba(10, 35, 33, 0.35) 70%, rgba(10, 35, 33, 0.55) 100%),
    linear-gradient(180deg, rgba(8, 32, 30, 0.35) 0%, transparent 28%, rgba(8, 32, 30, 0.78) 100%);
}

.hero-atmosphere {
  display: none;
}

.hero-copy {
  width: min(var(--max), calc(100% - 2rem));
  margin: 0 auto 3.5rem;
  padding: 5.5rem 0 0;
  color: var(--sand);
  animation: rise 0.9s ease both;
}

@keyframes rise {
  from { opacity: 0; transform: translateY(18px); }
  to { opacity: 1; transform: translateY(0); }
}

.eyebrow {
  display: inline-block;
  margin: 0 0 0.85rem;
  font-weight: 700;
  font-size: 0.85rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--sunset-hot);
}

.hero h1 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(2.6rem, 8vw, 4.8rem);
  line-height: 0.98;
  letter-spacing: -0.045em;
  max-width: 10ch;
}

.lede {
  margin: 1.1rem 0 0;
  max-width: 34ch;
  font-size: clamp(1.05rem, 2.4vw, 1.25rem);
  color: rgba(242, 230, 212, 0.9);
}

.cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.6rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 2.9rem;
  padding: 0.7rem 1.2rem;
  border-radius: 999px;
  font-weight: 700;
  text-decoration: none;
  transition: transform 0.2s ease, background 0.2s ease, color 0.2s ease;
}

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

.btn-primary {
  background: var(--sunset);
  color: #1a120c;
}

.btn-primary:hover {
  background: var(--sunset-hot);
  color: #1a120c;
}

.btn-ghost {
  background: rgba(255, 250, 243, 0.12);
  color: var(--sand);
  border: 1px solid rgba(242, 230, 212, 0.35);
}

.btn-ghost:hover {
  background: rgba(255, 250, 243, 0.2);
  color: white;
}

.strip {
  background: var(--ink);
  color: var(--sand);
  text-align: center;
  padding: 0.85rem 1.2rem;
  font-size: 0.95rem;
  font-weight: 600;
}

.strip p {
  margin: 0;
}

.section {
  width: min(var(--max), calc(100% - 2rem));
  margin: 0 auto;
  padding: 4.2rem 0 0;
}

.section-head {
  max-width: 38rem;
  margin-bottom: 2rem;
}

.section-head h2 {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 4vw, 2.5rem);
  letter-spacing: -0.03em;
  line-height: 1.1;
}

.section-head p {
  margin: 0.7rem 0 0;
  color: var(--muted);
  font-size: 1.05rem;
}

.feature-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1rem;
}

.feature-list li {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 1rem;
  align-items: start;
  padding: 1.2rem 0;
  border-top: 1px solid var(--line);
}

.feature-list li:last-child {
  border-bottom: 1px solid var(--line);
}

.mark {
  font-family: var(--font-display);
  font-weight: 700;
  color: var(--sunset);
  font-size: 0.95rem;
  padding-top: 0.2rem;
}

.feature-list h3,
.step-list h3,
.system-grid h3,
.tips-split h3 {
  margin: 0 0 0.35rem;
  font-family: var(--font-display);
  font-size: 1.2rem;
  letter-spacing: -0.02em;
}

.feature-list p,
.step-list p,
.system-grid p {
  margin: 0;
  color: var(--muted);
}

.step-list {
  list-style: none;
  margin: 0;
  padding: 0;
  counter-reset: step;
  display: grid;
  gap: 1rem;
}

.step-list li {
  position: relative;
  padding: 1.35rem 1.35rem 1.35rem 4.2rem;
  background: rgba(255, 255, 255, 0.55);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  counter-increment: step;
  transition: border-color 0.2s ease, transform 0.2s ease;
}

.step-list li:hover {
  border-color: rgba(20, 99, 94, 0.35);
  transform: translateY(-2px);
}

.step-list li::before {
  content: counter(step);
  position: absolute;
  left: 1.1rem;
  top: 1.25rem;
  width: 2.1rem;
  height: 2.1rem;
  border-radius: 50%;
  display: grid;
  place-items: center;
  background: var(--lagoon);
  color: var(--sand);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.95rem;
}

.system-grid {
  display: grid;
  gap: 1rem;
}

.system-grid article {
  padding: 1.35rem;
  border-radius: var(--radius);
  background:
    linear-gradient(145deg, rgba(255, 255, 255, 0.7), rgba(242, 230, 212, 0.35));
  border: 1px solid var(--line);
}

.toc {
  display: grid;
  gap: 0.55rem 1.25rem;
  padding: 1.25rem 1.35rem;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.55);
  margin-bottom: 0.5rem;
}

.toc a {
  text-decoration: none;
  font-weight: 600;
  color: var(--lagoon-mid);
}

.toc a:hover {
  color: var(--sunset);
}

.prose {
  color: var(--muted);
  font-size: 1.05rem;
  max-width: 46rem;
}

.prose p {
  margin: 0 0 1rem;
}

.prose p:last-child {
  margin-bottom: 0;
}

.guide-block {
  display: grid;
  gap: 1rem;
  margin-top: 0.5rem;
}

.guide-block article {
  padding: 1.4rem 1.45rem;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.55);
}

.guide-block h3 {
  margin: 0 0 0.55rem;
  font-family: var(--font-display);
  font-size: 1.2rem;
  letter-spacing: -0.02em;
}

.guide-block p,
.guide-block li {
  color: var(--muted);
}

.guide-block ul,
.checklist {
  margin: 0.55rem 0 0;
  padding-left: 1.15rem;
}

.guide-block li + li,
.checklist li + li {
  margin-top: 0.4rem;
}

.checklist {
  list-style: none;
  padding-left: 0;
}

.checklist li {
  position: relative;
  padding-left: 1.6rem;
}

.checklist li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.45rem;
  width: 0.7rem;
  height: 0.7rem;
  border: 2px solid var(--lagoon-mid);
  border-radius: 0.2rem;
}

.glossary {
  display: grid;
  gap: 0.85rem;
}

.glossary dt {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.05rem;
}

.glossary dd {
  margin: 0.2rem 0 0;
  color: var(--muted);
}

.official-box {
  margin-top: 1.25rem;
  padding: 1.25rem 1.35rem;
  border-radius: var(--radius);
  border: 1px solid rgba(20, 99, 94, 0.28);
  background: linear-gradient(145deg, rgba(31, 138, 130, 0.1), rgba(255, 255, 255, 0.65));
}

.official-box h3 {
  margin: 0 0 0.5rem;
  font-family: var(--font-display);
  font-size: 1.1rem;
}

.official-box ul {
  margin: 0.5rem 0 0;
  padding-left: 1.15rem;
  color: var(--muted);
}

.official-box li + li {
  margin-top: 0.35rem;
}

.tips-split {
  display: grid;
  gap: 1.25rem;
}

.tips-split > div {
  padding: 1.4rem;
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.55);
  border: 1px solid var(--line);
}

.tips-split ul {
  margin: 0.6rem 0 0;
  padding-left: 1.15rem;
  color: var(--muted);
}

.tips-split li + li {
  margin-top: 0.45rem;
}

.safety {
  background:
    linear-gradient(160deg, rgba(227, 107, 44, 0.12), rgba(255, 255, 255, 0.65)) !important;
  border-color: rgba(227, 107, 44, 0.28) !important;
}

.faq-list {
  display: grid;
  gap: 0.75rem;
}

details {
  border: 1px solid var(--line);
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.55);
  padding: 0.2rem 1rem 0.2rem;
}

summary {
  cursor: pointer;
  list-style: none;
  font-weight: 700;
  font-family: var(--font-display);
  padding: 0.95rem 0;
}

summary::-webkit-details-marker {
  display: none;
}

summary::after {
  content: "+";
  float: right;
  color: var(--lagoon-mid);
  font-weight: 700;
}

details[open] summary::after {
  content: "–";
}

details p {
  margin: 0 0 1rem;
  color: var(--muted);
}

.cta-final {
  text-align: center;
  padding-bottom: 1rem;
}

.cta-final h2 {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 4vw, 2.4rem);
  letter-spacing: -0.03em;
}

.cta-final p {
  margin: 0.75rem auto 1.4rem;
  max-width: 34rem;
  color: var(--muted);
}

.site-footer {
  margin-top: 4rem;
  padding: 2rem clamp(1rem, 4vw, 2rem) 2.5rem;
  border-top: 1px solid var(--line);
  display: flex;
  flex-direction: column;
  gap: 1rem;
  color: var(--muted);
  font-size: 0.95rem;
}

.site-footer strong {
  color: var(--ink);
  font-family: var(--font-display);
}

.site-footer p {
  margin: 0.25rem 0 0;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.9rem 1.2rem;
}

.footer-links a {
  text-decoration: none;
  font-weight: 600;
}

@media (min-width: 720px) {
  .site-nav nav {
    display: flex;
  }

  .lang-switch {
    margin-left: 0;
  }

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

  .guide-block {
    grid-template-columns: 1fr 1fr;
  }

  .glossary {
    grid-template-columns: 1fr 1fr;
    gap: 1rem 1.5rem;
  }

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

  .feature-list li {
    border: 1px solid var(--line);
    border-radius: var(--radius);
    padding: 1.25rem;
    background: rgba(255, 255, 255, 0.45);
  }

  .feature-list li:last-child {
    border-bottom: 1px solid var(--line);
  }

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

  .tips-split {
    grid-template-columns: 1fr 1fr;
  }

  .site-footer {
    flex-direction: row;
    justify-content: space-between;
    align-items: end;
  }
}

@media (min-width: 960px) {
  .system-grid {
    grid-template-columns: 1fr 1fr 1fr;
  }

  .hero-copy {
    margin-bottom: 4.5rem;
  }
}

.lang-tip {
  position: fixed;
  right: 1rem;
  bottom: 1rem;
  z-index: 40;
  display: flex;
  align-items: center;
  gap: 0.65rem;
  padding: 0.75rem 0.9rem;
  border-radius: 14px;
  background: var(--ink);
  color: var(--sand);
  box-shadow: var(--shadow);
  font-size: 0.92rem;
  font-weight: 600;
  animation: rise 0.45s ease both;
}

.lang-tip a {
  color: var(--sunset-hot);
  font-weight: 700;
}

.lang-tip button {
  border: 0;
  background: transparent;
  color: rgba(242, 230, 212, 0.75);
  font-size: 1.1rem;
  line-height: 1;
  cursor: pointer;
  padding: 0 0.15rem;
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .lang-tip {
    animation: none;
  }
  .hero-copy,
  .btn,
  .step-list li {
    animation: none;
    transition: none;
  }
}