/* ===== 基本設定 ===== */
:root {
  --bg-0: #050f25;
  --bg-1: #0b1e3f;
  --bg-2: #13305e;
  --bg-card: rgba(255, 255, 255, 0.06);
  --bg-card-hover: rgba(255, 255, 255, 0.1);
  --border: rgba(255, 255, 255, 0.08);
  --text-0: #ffffff;
  --text-1: #cbd8ee;
  --text-2: #8fa3c4;
  --accent: #4fc3f7;
  --accent-2: #81d4fa;
  --warn: #ffb74d;
  --star: #ffd54f;
  --star-dim: rgba(255, 213, 79, 0.25);
  --radius: 14px;
  --shadow: 0 4px 16px rgba(0, 0, 0, 0.35);
}

* {
  box-sizing: border-box;
  -webkit-tap-highlight-color: transparent;
}

html, body {
  margin: 0;
  padding: 0;
  background: linear-gradient(180deg, var(--bg-0) 0%, var(--bg-1) 60%, var(--bg-2) 100%);
  background-attachment: fixed;
  color: var(--text-0);
  font-family: "Noto Sans JP", system-ui, -apple-system, "Hiragino Sans", "Yu Gothic", sans-serif;
  font-size: 15px;
  line-height: 1.5;
  min-height: 100vh;
  min-height: 100dvh;
}

body {
  max-width: 480px;
  margin: 0 auto;
  padding: 0 14px 40px;
  padding-top: env(safe-area-inset-top, 0);
  padding-bottom: max(40px, env(safe-area-inset-bottom));
}

h1, h2, h3 {
  margin: 0;
  font-weight: 700;
}

/* ===== ヘッダー ===== */
.app-header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: linear-gradient(180deg, rgba(5, 15, 37, 0.95), rgba(5, 15, 37, 0.7));
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  padding: 14px 0 10px;
  margin: 0 -14px 12px;
  padding-left: 14px;
  padding-right: 14px;
  border-bottom: 1px solid var(--border);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.title-group h1 {
  font-size: 20px;
  letter-spacing: 0.02em;
}

.subtitle {
  display: block;
  font-size: 11px;
  color: var(--text-2);
  margin-top: 2px;
}

.refresh-btn {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  border: 1px solid var(--border);
  background: var(--bg-card);
  color: var(--text-0);
  font-size: 18px;
  cursor: pointer;
  transition: transform 0.6s ease, background 0.2s;
}

.refresh-btn:active,
.refresh-btn.spinning {
  background: var(--bg-card-hover);
}

.refresh-btn.spinning {
  animation: spin 1s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

.last-updated {
  font-size: 11px;
  color: var(--text-2);
  margin-top: 6px;
}

/* ===== サマリーカード ===== */
.summary-card {
  background: linear-gradient(135deg, rgba(79, 195, 247, 0.12), rgba(19, 48, 94, 0.6));
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px;
  margin-bottom: 18px;
  box-shadow: var(--shadow);
}

.summary-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 12px;
}

.summary-header .label {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.15em;
  color: var(--accent);
  background: rgba(79, 195, 247, 0.15);
  padding: 3px 8px;
  border-radius: 6px;
}

.summary-time {
  font-size: 13px;
  color: var(--text-1);
}

.summary-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.summary-item {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 12px;
  min-height: 82px;
}

.item-label {
  font-size: 11px;
  color: var(--text-2);
  letter-spacing: 0.05em;
  margin-bottom: 4px;
}

.item-value {
  font-size: 24px;
  font-weight: 700;
  color: var(--text-0);
  display: flex;
  align-items: baseline;
  gap: 4px;
}

.item-value .unit {
  font-size: 13px;
  font-weight: 500;
  color: var(--text-1);
}

.item-sub {
  font-size: 12px;
  color: var(--text-2);
  margin-top: 2px;
}

.wind-arrow {
  display: inline-block;
  font-size: 20px;
  color: var(--accent-2);
  transform-origin: center;
  transition: transform 0.3s ease;
}

.weather-icon {
  font-size: 28px;
}

/* ===== 潮汐 ===== */
.tide-today {
  margin-top: 14px;
  padding-top: 12px;
  border-top: 1px dashed var(--border);
}

.tide-title {
  font-size: 11px;
  color: var(--text-2);
  letter-spacing: 0.1em;
  margin-bottom: 8px;
}

.tide-items {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.tide-chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 10px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 20px;
  font-size: 13px;
}

.tide-chip.high { border-color: rgba(79, 195, 247, 0.4); }
.tide-chip.low  { border-color: rgba(255, 183, 77, 0.4); }

.tide-chip .tide-type {
  font-weight: 700;
  font-size: 11px;
  letter-spacing: 0.08em;
}
.tide-chip.high .tide-type { color: var(--accent-2); }
.tide-chip.low .tide-type  { color: var(--warn); }

.tide-loading, .tide-error {
  font-size: 12px;
  color: var(--text-2);
}

/* ===== セクションタイトル ===== */
.section-title {
  font-size: 14px;
  letter-spacing: 0.08em;
  color: var(--text-1);
  margin: 4px 4px 10px;
}

/* ===== 10日間予報 ===== */
.forecast-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.loading {
  text-align: center;
  padding: 30px 0;
  color: var(--text-2);
  font-size: 13px;
}

.forecast-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: background 0.15s;
}

.forecast-card.today {
  border-color: rgba(79, 195, 247, 0.4);
  background: rgba(79, 195, 247, 0.06);
}

.forecast-summary {
  display: grid;
  grid-template-columns: 62px 46px 1fr auto;
  align-items: center;
  gap: 10px;
  padding: 12px;
  cursor: pointer;
  user-select: none;
}

.forecast-summary:active {
  background: var(--bg-card-hover);
}

.day-col .date {
  font-size: 15px;
  font-weight: 700;
}

.day-col .dow {
  font-size: 11px;
  color: var(--text-2);
  margin-top: 2px;
}

.day-col .dow.sat { color: #64b5f6; }
.day-col .dow.sun { color: #ef5350; }

.weather-col {
  font-size: 26px;
  text-align: center;
}

.data-col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4px 10px;
  font-size: 12px;
}

.data-col .data-row {
  display: flex;
  gap: 4px;
  align-items: baseline;
  color: var(--text-1);
}

.data-col .data-row .data-label {
  font-size: 10px;
  color: var(--text-2);
}

.stars-col {
  text-align: right;
  min-width: 62px;
}

.stars {
  font-size: 13px;
  letter-spacing: 1px;
  color: var(--star-dim);
  white-space: nowrap;
}

.stars .star-on {
  color: var(--star);
}

.chevron {
  display: inline-block;
  margin-left: 4px;
  color: var(--text-2);
  font-size: 12px;
  transition: transform 0.25s;
}

.forecast-card.expanded .chevron {
  transform: rotate(180deg);
}

/* ===== 時間別詳細 ===== */
.hourly-detail {
  display: none;
  border-top: 1px solid var(--border);
  background: rgba(0, 0, 0, 0.2);
  padding: 10px 12px 14px;
}

.forecast-card.expanded .hourly-detail {
  display: block;
}

.hourly-row {
  display: grid;
  grid-template-columns: 48px 30px 1fr 1fr;
  align-items: center;
  gap: 8px;
  padding: 8px 0;
  font-size: 12px;
  border-bottom: 1px dashed rgba(255, 255, 255, 0.05);
}

.hourly-row:last-child { border-bottom: none; }

.hourly-row .h-time {
  color: var(--text-1);
  font-weight: 700;
  font-size: 13px;
}

.hourly-row .h-weather {
  font-size: 18px;
  text-align: center;
}

.hourly-row .h-wave,
.hourly-row .h-wind {
  color: var(--text-1);
}

.hourly-row .h-wave .h-label,
.hourly-row .h-wind .h-label {
  color: var(--text-2);
  font-size: 10px;
  margin-right: 3px;
}

/* ===== フッター ===== */
.app-footer {
  margin-top: 24px;
  text-align: center;
  font-size: 11px;
  color: var(--text-2);
}

.app-footer p { margin: 0; }

/* ===== エラー ===== */
.error-inline {
  color: var(--warn);
  font-size: 12px;
}

/* ===== スクロールバー調整 ===== */
@media (max-width: 380px) {
  .summary-grid { gap: 8px; }
  .item-value { font-size: 20px; }
  .forecast-summary { grid-template-columns: 54px 40px 1fr auto; gap: 8px; padding: 10px; }
}