:root {
  color-scheme: light;
  --ink: #123e68;
  --paper: #fffdf8;
  --turquoise: #16a4b7;
  --turquoise-soft: #e2f7fa;
  --orange: #f39417;
  --orange-soft: #fff2dc;
  --purple: #7541b3;
  --purple-soft: #f3eafb;
  --green-soft: #eef7e8;
  --line: #c8d9e5;
  --shadow: 0 22px 55px rgba(15, 55, 86, 0.14);
  font-family: "Segoe UI", system-ui, sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  padding: 20px;
  background: #172027;
  color: var(--ink);
}

.page-shell {
  width: min(1180px, 100%);
  margin: 0 auto;
  overflow: hidden;
  border: 3px solid #9aabb5;
  border-radius: 42px;
  background: var(--paper);
  box-shadow: var(--shadow);
}

.site-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 24px;
  padding: 24px 38px;
  border-bottom: 3px dashed var(--line);
}

.brand, .site-header nav, h1, h2, .door-action, footer {
  font-family: "Comic Sans MS", "Segoe Print", cursive;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 14px;
  color: var(--ink);
  font-size: 1.25rem;
  text-decoration: none;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 54px;
  aspect-ratio: 1;
  border: 4px solid var(--turquoise);
  border-radius: 50%;
}

.brand-mark::before, .brand-mark::after, .brand-mark span {
  content: "";
  display: block;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--turquoise);
}

.brand-mark { grid-template-columns: repeat(3, auto); gap: 7px; }
.brand-mark span { width: 22px; height: 3px; }

.site-header nav { display: flex; gap: 12px; align-items: center; font-size: 1.1rem; }
.site-header nav a { color: var(--ink); text-decoration: none; border-bottom: 3px solid var(--turquoise); padding-bottom: 6px; }

.hero img { display: block; width: 100%; height: auto; }

.doors { padding: 44px 40px 52px; }
.doors h1, .shared-way h2 { margin: 0; font-weight: 500; letter-spacing: 0.01em; }
.doors h1 { text-align: center; font-size: clamp(2rem, 4vw, 3.1rem); }
.section-intro { margin: 6px 0 36px; text-align: center; font-size: 1.25rem; }

.door-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.door {
  position: relative;
  display: flex;
  flex-direction: column;
  min-height: 310px;
  padding: 34px 30px 28px;
  overflow: hidden;
  border: 4px solid currentColor;
  border-radius: 42px;
  color: var(--ink);
  text-decoration: none;
  box-shadow: 0 8px 0 transparent;
  transition: transform 180ms ease, box-shadow 180ms ease, background-color 180ms ease;
}
.door::after {
  content: "";
  position: absolute;
  right: -35px;
  bottom: -40px;
  width: 120px;
  height: 120px;
  border: 3px dashed currentColor;
  border-radius: 50%;
  opacity: 0.08;
  transition: transform 220ms ease;
}
.door:hover, .door:focus-visible { transform: translateY(-9px) rotate(-0.35deg); box-shadow: 0 15px 0 rgba(18, 62, 104, 0.12); outline: none; }
.door:hover::after, .door:focus-visible::after { transform: scale(1.25) rotate(20deg); }
.door-understand { border-color: var(--turquoise); background: var(--turquoise-soft); }
.door-status { border-color: var(--orange); background: var(--orange-soft); }
.door-join { border-color: var(--purple); background: var(--purple-soft); }
.door-understand:hover, .door-understand:focus-visible { background: #cef2f6; }
.door-status:hover, .door-status:focus-visible { background: #ffe7bf; }
.door-join:hover, .door-join:focus-visible { background: #eadbfa; }

.door-icon {
  display: grid;
  place-items: center;
  width: 66px;
  height: 66px;
  margin-bottom: 24px;
  border: 3px dashed currentColor;
  border-radius: 50%;
  font: 700 1.6rem system-ui, sans-serif;
  transition: transform 180ms ease, background-color 180ms ease;
}
.door:hover .door-icon, .door:focus-visible .door-icon { transform: rotate(7deg) scale(1.08); background: rgba(255,255,255,.7); }
.door h2 { margin: 0 0 12px; font-size: 1.5rem; font-weight: 500; }
.door p { margin: 0; font-size: 1.08rem; line-height: 1.45; }
.door-action { margin-top: auto; padding-top: 24px; font-size: 1rem; font-weight: 700; opacity: 0; transform: translateY(8px); transition: opacity 180ms ease, transform 180ms ease; }
.door:hover .door-action, .door:focus-visible .door-action { opacity: 1; transform: translateY(0); }

.shared-way {
  margin: 0 40px 54px;
  padding: 34px 38px;
  border: 3px dashed var(--line);
  border-radius: 44px;
  background: #fff;
}
.shared-way h2 { font-size: clamp(1.8rem, 3vw, 2.5rem); }
.shared-way > p { max-width: 970px; margin: 6px 0 28px; font-size: 1.12rem; line-height: 1.5; }
.way-steps { display: grid; grid-template-columns: 1fr auto 1fr auto 1fr; gap: 18px; align-items: center; text-align: center; }
.way-steps span { padding: 20px; border-radius: 32px; background: var(--green-soft); font-size: 1.08rem; }
.way-steps b { color: var(--orange); font-size: 1.4rem; }

footer {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 30px;
  padding: 24px;
  border-top: 3px dashed var(--line);
  background: linear-gradient(90deg, #eef9ec, #fff8e8, #f5ecfb);
  font-size: 1.05rem;
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition: none !important; }
}

@media (max-width: 820px) {
  body { padding: 8px; }
  .page-shell { border-radius: 28px; }
  .site-header { align-items: flex-start; padding: 20px; }
  .site-header nav { display: none; }
  .doors { padding: 34px 20px; }
  .door-grid { grid-template-columns: 1fr; }
  .door { min-height: 240px; }
  .door-action { opacity: 1; transform: none; }
  .shared-way { margin: 0 20px 34px; padding: 28px 24px; }
  .way-steps { grid-template-columns: 1fr; }
  .way-steps b { transform: rotate(90deg); }
}