:root {
  --bg: #f3efe8;
  --bg-alt: #fbf9f3;
  --ink: #1f1c18;
  --muted: #5f5951;
  --accent: #1f6f6b;
  --accent-2: #d46a43;
  --line: #ddd3c7;
  --card: rgba(255, 255, 255, 0.82);
  --shadow: 0 18px 48px rgba(31, 28, 24, 0.12);
  --radius: 22px;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Zen Kaku Gothic New", "Hiragino Kaku Gothic ProN", "Hiragino Sans", sans-serif;
  color: var(--ink);
  background: radial-gradient(circle at top left, #fbeee1 0%, transparent 45%),
    radial-gradient(circle at 80% 20%, #e8f3f0 0%, transparent 50%),
    var(--bg);
  min-height: 100vh;
}

a {
  color: inherit;
  text-decoration: none;
}

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

.container {
  width: min(1120px, 92vw);
  margin: 0 auto;
}

.ambient {
  position: fixed;
  inset: 0;
  z-index: -1;
  background: radial-gradient(500px 300px at 10% 20%, rgba(212, 106, 67, 0.08), transparent),
    radial-gradient(600px 400px at 90% 10%, rgba(31, 111, 107, 0.08), transparent),
    radial-gradient(600px 420px at 50% 90%, rgba(210, 198, 179, 0.2), transparent);
}

.site-header {
  position: sticky;
  top: 0;
  backdrop-filter: blur(10px);
  background: rgba(243, 239, 232, 0.86);
  border-bottom: 1px solid rgba(221, 211, 199, 0.6);
  z-index: 10;
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 0;
  gap: 20px;
}

.logo {
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-size: 0.9rem;
}

.nav {
  display: flex;
  gap: 18px;
  font-size: 0.9rem;
  color: var(--muted);
}

.nav a {
  padding: 6px 10px;
  border-radius: 999px;
  transition: all 0.2s ease;
}

.nav a:hover {
  background: rgba(31, 111, 107, 0.12);
  color: var(--ink);
}

.main {
  padding-bottom: 80px;
}

.hero {
  padding: 80px 0 40px;
}

.hero h1 {
  font-family: "Shippori Mincho B1", serif;
  font-size: clamp(2.4rem, 4vw, 3.6rem);
  margin: 10px 0 18px;
  letter-spacing: 0.02em;
}

.eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.16em;
  font-size: 0.72rem;
  color: var(--accent);
  font-weight: 600;
}

.lead {
  font-size: 1.1rem;
  max-width: 640px;
  color: var(--muted);
}

.hero-actions {
  margin-top: 28px;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 22px;
  border-radius: 999px;
  font-weight: 600;
  border: 1px solid transparent;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.btn.primary {
  background: var(--accent);
  color: #fff;
  box-shadow: 0 12px 20px rgba(31, 111, 107, 0.2);
}

.btn.ghost {
  border-color: var(--line);
  color: var(--ink);
  background: rgba(255, 255, 255, 0.6);
}

.btn:hover {
  transform: translateY(-2px);
}

.hero-meta {
  list-style: none;
  padding: 0;
  margin: 32px 0 0;
  display: grid;
  gap: 10px;
  color: var(--muted);
}

.panel {
  padding: 48px 0;
}

.panel:nth-of-type(even) {
  background: var(--bg-alt);
}

.section-header {
  max-width: 720px;
}

.section-header h2 {
  font-family: "Shippori Mincho B1", serif;
  font-size: 2rem;
  margin-bottom: 12px;
}

.section-header p {
  color: var(--muted);
}

.about-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 18px;
  margin-top: 28px;
}

.about-card {
  padding: 22px;
  border-radius: var(--radius);
  background: var(--card);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
}

.about-card h3 {
  margin-top: 0;
  font-size: 1rem;
}

.contest-grid {
  margin-top: 26px;
  display: grid;
  gap: 20px;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
}

.card {
  background: var(--card);
  border-radius: var(--radius);
  padding: 22px;
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.card h3 {
  margin: 12px 0 6px;
}

.card-top {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.tag {
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 4px 10px;
  border-radius: 999px;
  background: rgba(31, 111, 107, 0.14);
  color: var(--accent);
  font-weight: 700;
}

.tag-muted {
  background: rgba(212, 106, 67, 0.12);
  color: var(--accent-2);
}

.contest-name {
  margin: 0;
  color: var(--muted);
  font-size: 0.95rem;
}

.card dl {
  margin: 0;
  display: grid;
  gap: 12px;
}

.card dl div {
  display: grid;
  gap: 6px;
}

.card dt {
  font-weight: 700;
  font-size: 0.8rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
}

.card dd {
  margin: 0;
}

.link {
  margin-top: auto;
  font-weight: 600;
  color: var(--accent);
  display: inline-flex;
  gap: 6px;
  align-items: center;
}

.link::after {
  content: "→";
}

.attention {
  background: linear-gradient(120deg, rgba(31, 111, 107, 0.06), rgba(212, 106, 67, 0.06));
}

.notes {
  list-style: none;
  padding: 0;
  margin: 20px 0 0;
  display: grid;
  gap: 12px;
  color: var(--muted);
}

.cta {
  margin-top: 20px;
  padding: 20px 24px;
  border-radius: var(--radius);
  border: 1px dashed var(--line);
  background: rgba(255, 255, 255, 0.6);
  color: var(--muted);
}

.site-footer {
  border-top: 1px solid var(--line);
  padding: 32px 0 40px;
  background: rgba(243, 239, 232, 0.9);
  color: var(--muted);
  font-size: 0.9rem;
}

@media (max-width: 720px) {
  .site-header .container {
    flex-direction: column;
    align-items: flex-start;
  }

  .nav {
    flex-wrap: wrap;
    gap: 8px;
  }

  .hero {
    padding-top: 60px;
  }
}

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