:root {
  --bg: #0a1d33;
  --bg-2: #0f2845;
  --card: #14365e;
  --card-2: #1b4373;
  --text: #ecf3ff;
  --muted: #9bb3d4;
  --accent: #5fc9ff;
  --warn: #ffb86c;
  --bad: #ff7e7e;
  --good: #82e5b0;
  --line: rgba(255, 255, 255, 0.08);
  --shadow: 0 4px 16px rgba(0, 0, 0, 0.35);
  --safe-top: env(safe-area-inset-top, 0px);
  --safe-bottom: env(safe-area-inset-bottom, 0px);
  font-size: 16px;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: linear-gradient(180deg, var(--bg) 0%, var(--bg-2) 100%);
  background-attachment: fixed;
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Yu Gothic", system-ui, sans-serif;
  min-height: 100%;
  -webkit-font-smoothing: antialiased;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: calc(8px + var(--safe-top)) 14px 8px;
  background: rgba(10, 29, 51, 0.85);
  backdrop-filter: blur(10px);
  position: sticky;
  top: 0;
  z-index: 50;
  border-bottom: 1px solid var(--line);
}
.topbar h1 {
  font-size: 1.1rem;
  margin: 0;
  letter-spacing: 0.04em;
}
.topbar-sub {
  display: block;
  font-size: 0.78rem;
  color: var(--muted);
  margin-top: 2px;
}
.topbar-right { display: flex; gap: 6px; }
.icon-btn {
  width: 38px;
  height: 38px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--line);
  color: var(--text);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  font-size: 18px;
  -webkit-tap-highlight-color: transparent;
}
.icon-btn:active { background: rgba(255, 255, 255, 0.16); }

.day-tabs {
  display: flex;
  overflow-x: auto;
  gap: 6px;
  padding: 8px 12px;
  scrollbar-width: none;
}
.day-tabs::-webkit-scrollbar { display: none; }
.day-tab {
  flex: 0 0 auto;
  padding: 8px 12px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--line);
  border-radius: 12px;
  color: var(--text);
  font-size: 0.85rem;
  text-align: center;
  min-width: 64px;
  cursor: pointer;
  transition: background 0.15s;
}
.day-tab .day-num { font-size: 1.05rem; font-weight: 600; display: block; }
.day-tab .day-week { font-size: 0.7rem; color: var(--muted); display: block; }
.day-tab .day-tide { font-size: 0.65rem; color: var(--accent); display: block; margin-top: 2px; }
.day-tab.active {
  background: var(--accent);
  color: #0a1d33;
  border-color: var(--accent);
}
.day-tab.active .day-week,
.day-tab.active .day-tide { color: #0a1d33; opacity: 0.8; }
.day-tab.holiday .day-num { color: var(--bad); }
.day-tab.active.holiday .day-num { color: #0a1d33; }

main { padding: 0 12px calc(40px + var(--safe-bottom)); }

.card {
  background: linear-gradient(180deg, var(--card) 0%, var(--card-2) 100%);
  border-radius: 16px;
  padding: 14px;
  margin-bottom: 14px;
  box-shadow: var(--shadow);
  border: 1px solid var(--line);
}
.card-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  margin-bottom: 10px;
}
.card-head h2 {
  font-size: 0.95rem;
  margin: 0;
  font-weight: 600;
  letter-spacing: 0.03em;
}
.card-sub { font-size: 0.75rem; color: var(--muted); }

.summary-card {
  background: linear-gradient(180deg, var(--card) 0%, var(--card-2) 100%);
  border-radius: 16px;
  padding: 14px;
  margin: 6px 0 14px;
  box-shadow: var(--shadow);
  border: 1px solid var(--line);
}
.summary-loading {
  text-align: center;
  color: var(--muted);
  padding: 18px 0;
}
.summary-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 10px;
}
.summary-cell {
  background: rgba(0, 0, 0, 0.2);
  border-radius: 10px;
  padding: 10px;
}
.summary-cell .label { font-size: 0.7rem; color: var(--muted); display: block; }
.summary-cell .value { font-size: 1.05rem; font-weight: 600; margin-top: 2px; }
.summary-cell .sub { font-size: 0.75rem; color: var(--muted); }
.summary-cell.tide-ohshio .value { color: var(--accent); }
.summary-cell.tide-koshio .value { color: var(--warn); }

#tideChart {
  width: 100%;
  height: 200px;
  display: block;
  background: rgba(0, 0, 0, 0.18);
  border-radius: 10px;
}
.tide-extrema {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 10px;
  font-size: 0.78rem;
}
.tide-pill {
  background: rgba(0, 0, 0, 0.25);
  padding: 4px 8px;
  border-radius: 999px;
}
.tide-pill.high { color: var(--accent); }
.tide-pill.low { color: var(--warn); }

.score-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 8px;
}
.score-row {
  background: rgba(0, 0, 0, 0.22);
  padding: 10px 12px;
  border-radius: 10px;
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 4px 12px;
  align-items: center;
}
.score-row .name { font-size: 0.9rem; font-weight: 600; }
.score-row .method { font-size: 0.7rem; color: var(--muted); display: block; }
.score-row .stars {
  font-size: 1rem;
  font-weight: 600;
  letter-spacing: 0.05em;
}
.score-row .stars.s5 { color: var(--good); }
.score-row .stars.s4 { color: #c0e6a8; }
.score-row .stars.s3 { color: var(--warn); }
.score-row .stars.s2 { color: #f99; }
.score-row .stars.s1 { color: var(--bad); opacity: 0.85; }
.score-row .reason {
  grid-column: 1 / -1;
  font-size: 0.72rem;
  color: var(--muted);
  margin-top: 2px;
}
.score-row .best-window {
  grid-column: 1 / -1;
  font-size: 0.72rem;
  color: var(--accent);
}

.hourly-wrap {
  margin: 0 -14px;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}
table.hourly {
  width: 100%;
  min-width: 540px;
  border-collapse: collapse;
  font-size: 0.78rem;
}
table.hourly th, table.hourly td {
  padding: 6px 8px;
  border-bottom: 1px solid var(--line);
  text-align: center;
  white-space: nowrap;
}
table.hourly th {
  font-weight: 500;
  color: var(--muted);
  font-size: 0.7rem;
  text-align: center;
  position: sticky;
  top: 0;
  background: var(--card-2);
}
table.hourly td.t-hour { font-weight: 600; }
table.hourly tr.row-night { background: rgba(0, 0, 0, 0.18); }
table.hourly tr.row-twilight { background: rgba(255, 184, 108, 0.07); }
.weather-cell { font-size: 1rem; }
.wind-cell .arr {
  display: inline-block;
  transform-origin: center;
  font-size: 0.85rem;
  margin-right: 2px;
}
.wave-cell { color: var(--accent); }
.tide-cell { color: var(--warn); }

.moon-card .moon-row {
  display: flex;
  align-items: center;
  gap: 16px;
}
.moon-visual {
  width: 88px;
  height: 88px;
  flex: 0 0 auto;
}
.moon-meta { font-size: 0.85rem; line-height: 1.5; }
.moon-meta .age { font-size: 1.2rem; font-weight: 600; }

.footer-note {
  font-size: 0.7rem;
  color: var(--muted);
  text-align: center;
  margin-top: 18px;
  line-height: 1.6;
}
.footer-note a { color: var(--accent); }

/* modal */
.modal {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.6);
  z-index: 1000;
  display: flex;
  flex-direction: column;
}
.modal[hidden] { display: none; }
.modal-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: calc(10px + var(--safe-top)) 14px 10px;
  background: var(--bg);
  border-bottom: 1px solid var(--line);
}
.modal-head h2 { margin: 0; font-size: 1rem; }
.modal-tabs {
  display: flex;
  background: var(--bg);
  border-bottom: 1px solid var(--line);
}
.modal-tab {
  flex: 1;
  background: transparent;
  border: none;
  color: var(--muted);
  padding: 10px;
  font-size: 0.85rem;
  cursor: pointer;
  border-bottom: 2px solid transparent;
}
.modal-tab.active {
  color: var(--text);
  border-bottom-color: var(--accent);
}
.modal-body {
  flex: 1;
  background: var(--bg-2);
  overflow-y: auto;
  padding: 12px;
  -webkit-overflow-scrolling: touch;
}
.tabpanel { display: none; height: 100%; }
.tabpanel.active { display: block; }
.preset-list {
  display: grid;
  gap: 6px;
}
.preset-item {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--line);
  padding: 10px 12px;
  border-radius: 10px;
  display: flex;
  justify-content: space-between;
  gap: 8px;
  align-items: center;
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
}
.preset-item:active { background: rgba(255, 255, 255, 0.1); }
.preset-item .pname { font-weight: 600; font-size: 0.9rem; }
.preset-item .pmeta { font-size: 0.72rem; color: var(--muted); }
.preset-item .ptype {
  background: rgba(95, 201, 255, 0.15);
  color: var(--accent);
  font-size: 0.68rem;
  padding: 2px 6px;
  border-radius: 999px;
}
.preset-item.surf .ptype { background: rgba(255, 184, 108, 0.15); color: var(--warn); }
.preset-area-head {
  font-size: 0.75rem;
  color: var(--muted);
  margin: 12px 0 4px;
  letter-spacing: 0.06em;
}
.preset-item .del-btn {
  background: rgba(255, 126, 126, 0.15);
  color: var(--bad);
  border: none;
  border-radius: 6px;
  padding: 4px 8px;
  font-size: 0.7rem;
  cursor: pointer;
}

#map {
  height: calc(100vh - 230px);
  min-height: 320px;
  border-radius: 12px;
  overflow: hidden;
}
.map-pick {
  display: flex;
  gap: 8px;
  align-items: center;
  margin-top: 10px;
  font-size: 0.85rem;
}
.map-pick input {
  flex: 1;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid var(--line);
  color: var(--text);
  padding: 8px 10px;
  border-radius: 8px;
  font-size: 0.9rem;
}
.map-pick button {
  background: var(--accent);
  color: #0a1d33;
  border: none;
  font-weight: 600;
  padding: 8px 14px;
  border-radius: 8px;
  cursor: pointer;
}
.map-pick button:disabled { opacity: 0.4; }
.hint { font-size: 0.78rem; color: var(--muted); margin: 0 0 8px; }

.toast {
  position: fixed;
  bottom: calc(20px + var(--safe-bottom));
  left: 50%;
  transform: translateX(-50%);
  background: rgba(0, 0, 0, 0.85);
  color: var(--text);
  padding: 10px 16px;
  border-radius: 999px;
  font-size: 0.85rem;
  z-index: 2000;
  box-shadow: var(--shadow);
  pointer-events: none;
}

@media (min-width: 720px) {
  main { max-width: 760px; margin: 0 auto; }
  .day-tabs { max-width: 760px; margin: 0 auto; }
  .score-grid { grid-template-columns: 1fr 1fr; }
  .summary-grid { grid-template-columns: repeat(4, 1fr); }
}