:root {
  --background: #ffffff;
  --foreground: #09090b;
  --card: #ffffff;
  --muted: #f4f4f5;
  --muted-foreground: #71717a;
  --border: #e4e4e7;
  --primary: #18181b;
  --primary-foreground: #fafafa;
  --ring: #18181b;
  --radius: 0.5rem;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; min-width: 320px; font-family: Inter, "Noto Sans JP", system-ui, sans-serif; letter-spacing: 0; }
button, input, select { font: inherit; }
.material-symbols-outlined { font-size: 20px; font-variation-settings: "FILL" 0, "wght" 400, "GRAD" 0, "opsz" 20; }

.brand { text-decoration: none; }
.brand .material-symbols-outlined { font-size: 22px; }
.nav-link { color: var(--muted-foreground); font-size: 0.875rem; font-weight: 500; text-decoration: none; transition: color 150ms ease; }
.nav-link:hover, .nav-link.is-current { color: var(--foreground); }
.icon-button { display: inline-flex; width: 36px; height: 36px; align-items: center; justify-content: center; border: 0; border-radius: 6px; background: transparent; color: var(--foreground); cursor: pointer; }
.icon-button:hover { background: var(--muted); }

.intro { position: relative; overflow: hidden; background: var(--background); }
.dot-grid { background-image: radial-gradient(#e4e4e7 1px, transparent 1px); background-size: 24px 24px; }
.intro-fade { background: linear-gradient(to top, var(--background), rgba(255,255,255,.45), rgba(255,255,255,.7)); }
.badge { display: inline-flex; align-items: center; gap: 8px; border: 1px solid var(--border); border-radius: 9999px; background: var(--muted); padding: 5px 11px; color: var(--muted-foreground); font-size: 0.75rem; font-weight: 600; }
.badge .material-symbols-outlined { font-size: 16px; }
.notice { display: flex; width: 100%; align-items: flex-start; gap: 10px; border: 1px solid var(--border); border-radius: var(--radius); background: rgba(255,255,255,.84); padding: 12px 14px; box-shadow: 0 1px 2px rgba(0,0,0,.03); color: var(--muted-foreground); font-size: 0.875rem; line-height: 1.6; }
.notice p { margin: 0; }
.notice .material-symbols-outlined { flex: none; margin-top: 2px; color: var(--foreground); font-size: 18px; }

.section-heading { display: flex; align-items: flex-end; justify-content: space-between; gap: 24px; margin-bottom: 24px; }
.section-kicker { margin: 0 0 4px; color: var(--muted-foreground); font-size: 0.7rem; font-weight: 700; letter-spacing: .12em; }
.section-heading h2 { margin: 0; font-size: 1.5rem; font-weight: 700; letter-spacing: 0; }
.section-meta { display: flex; align-items: center; gap: 7px; color: var(--muted-foreground); font-size: 0.875rem; }

.search-panel { display: grid; grid-template-columns: minmax(260px, 1fr) minmax(150px, 210px) auto; gap: 14px; align-items: end; border: 1px solid var(--border); border-radius: 8px; background: var(--card); padding: 18px; box-shadow: 0 1px 3px rgba(0,0,0,.06); }
.field { display: grid; gap: 7px; }
.field label { color: var(--foreground); font-size: 0.8125rem; font-weight: 600; }
.input-wrap { position: relative; }
.input-wrap .material-symbols-outlined { position: absolute; top: 50%; left: 11px; color: var(--muted-foreground); transform: translateY(-50%); pointer-events: none; }
.field input, .field select { width: 100%; height: 40px; border: 1px solid var(--border); border-radius: 6px; background: var(--background); color: var(--foreground); font-size: 0.875rem; box-shadow: 0 1px 2px rgba(0,0,0,.03); outline: none; }
.field input { padding: 8px 12px 8px 38px; }
.field select { padding: 8px 34px 8px 12px; }
.field input::placeholder { color: #a1a1aa; }
.field input:focus, .field select:focus, button:focus-visible, a:focus-visible, summary:focus-visible { outline: 2px solid var(--ring); outline-offset: 2px; }
.button-group { display: flex; gap: 8px; }
.button { display: inline-flex; height: 40px; align-items: center; justify-content: center; gap: 7px; border-radius: 6px; padding: 0 13px; cursor: pointer; font-size: 0.8125rem; font-weight: 600; white-space: nowrap; transition: background 150ms ease, transform 100ms ease; }
.button:active { transform: scale(.98); }
.button-primary { border: 1px solid var(--primary); background: var(--primary); color: var(--primary-foreground); }
.button-primary:hover { background: #27272a; }
.button-secondary { border: 1px solid var(--border); background: var(--background); color: var(--foreground); box-shadow: 0 1px 2px rgba(0,0,0,.04); }
.button-secondary:hover { background: var(--muted); }

.status { margin: 12px 2px 18px; color: var(--muted-foreground); font-size: 0.75rem; }
.empty { border: 1px dashed var(--border); border-radius: 8px; padding: 40px 20px; color: var(--muted-foreground); text-align: center; }

.prefecture-list { display: grid; gap: 10px; }
.prefecture { overflow: clip; border: 1px solid var(--border); border-radius: 8px; background: var(--card); transition: box-shadow 150ms ease; }
.prefecture[open] { box-shadow: 0 3px 12px rgba(0,0,0,.06); }
.prefecture summary { position: relative; display: grid; grid-template-columns: minmax(180px, 1fr) auto; gap: 5px 16px; align-items: center; padding: 15px 48px 15px 18px; cursor: pointer; list-style: none; }
.prefecture summary::-webkit-details-marker { display: none; }
.prefecture summary:hover { background: #fafafa; }
.prefecture summary::after { content: "expand_more"; position: absolute; right: 17px; top: 50%; font-family: "Material Symbols Outlined"; font-size: 20px; color: var(--muted-foreground); transform: translateY(-50%); transition: transform 150ms ease; }
.prefecture[open] summary::after { transform: translateY(-50%) rotate(180deg); }
.summary-main { grid-column: 1; font-size: 0.9375rem; font-weight: 650; }
.summary-meta { grid-column: 1; color: var(--muted-foreground); font-size: 0.75rem; }
.speed-tags { display: flex; grid-column: 2; grid-row: 1 / span 2; flex-wrap: wrap; justify-content: flex-end; gap: 5px; }
.speed-tag { border: 1px solid var(--border); border-radius: 9999px; background: var(--muted); padding: 2px 8px; color: var(--foreground); font-family: "JetBrains Mono", monospace; font-size: 0.7rem; font-weight: 500; white-space: nowrap; }
.table-wrap { overflow-x: auto; border-top: 1px solid var(--border); }
table { width: 100%; min-width: 760px; border-collapse: collapse; font-size: 0.8125rem; }
thead th { background: #fafafa; color: var(--muted-foreground); font-size: 0.72rem; font-weight: 600; text-align: left; }
th, td { border-bottom: 1px solid var(--border); padding: 11px 14px; vertical-align: top; overflow-wrap: anywhere; }
tbody tr:hover { background: #fafafa; }
tbody tr:last-child td { border-bottom: 0; }
.wind-speed { color: var(--foreground); font-family: "JetBrains Mono", monospace; font-weight: 600; text-align: center; white-space: nowrap; }
.footer-link { color: var(--muted-foreground); text-decoration: underline; text-underline-offset: 4px; transition: color 150ms ease; }
.footer-link:hover { color: var(--foreground); }

@media (max-width: 860px) {
  .search-panel { grid-template-columns: 1fr 180px; }
  .button-group { grid-column: 1 / -1; }
  .button { flex: 1 1 0; }
}

@media (max-width: 640px) {
  .site-nav .brand span:last-child { display: none; }
  .section-heading { align-items: flex-start; flex-direction: column; gap: 8px; }
  .search-panel { grid-template-columns: 1fr; padding: 14px; }
  .button-group { grid-column: auto; }
  .prefecture summary { grid-template-columns: 1fr; padding-right: 44px; }
  .speed-tags { grid-column: 1; grid-row: auto; justify-content: flex-start; margin-top: 4px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { scroll-behavior: auto !important; transition-duration: .01ms !important; }
}