:root {
  --bg: #0f1020;
  --panel: rgba(255,255,255,.085);
  --panel-strong: rgba(255,255,255,.13);
  --line: rgba(255,255,255,.14);
  --text: #f7f7ff;
  --muted: #b9bad2;
  --primary: #7a6cff;
  --primary-2: #5de0ff;
  --good: #4be28c;
  --warning: #ffd166;
  --radius: 22px;
  --shadow: 0 18px 50px rgba(0,0,0,.33);
}

* { box-sizing: border-box; -webkit-tap-highlight-color: transparent; }
html { color-scheme: dark; }
body {
  margin: 0;
  min-height: 100dvh;
  color: var(--text);
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background:
    radial-gradient(circle at 15% 10%, rgba(122,108,255,.28), transparent 35%),
    radial-gradient(circle at 88% 25%, rgba(93,224,255,.18), transparent 30%),
    linear-gradient(160deg, #111226 0%, #090a15 100%);
}
a { color: var(--primary-2); }
button, input, textarea, select { font: inherit; }

.page-shell {
  width: min(calc(100% - 28px), 760px);
  margin: 0 auto;
  padding: max(14px, env(safe-area-inset-top)) 0 max(24px, env(safe-area-inset-bottom));
}

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 4px 2px 14px;
}
.brand-link {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--text);
  text-decoration: none;
  min-width: 0;
}
.mini-logo {
  width: 44px;
  height: 44px;
  flex: 0 0 auto;
  border-radius: 15px;
  display: grid;
  place-items: center;
  font-weight: 900;
  background: linear-gradient(135deg, var(--primary), var(--primary-2));
  box-shadow: 0 10px 30px rgba(122,108,255,.35);
}
.brand-copy strong { display:block; font-size:1.06rem; letter-spacing:.03em; }
.brand-copy span { display:block; margin-top:2px; color:var(--muted); font-size:.72rem; }
.back-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 42px;
  padding: 9px 13px;
  border: 1px solid var(--line);
  border-radius: 14px;
  color: var(--text);
  background: var(--panel);
  text-decoration: none;
  font-weight: 750;
  white-space: nowrap;
}

.page-card {
  padding: clamp(20px, 5vw, 34px);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: linear-gradient(180deg, rgba(255,255,255,.105), rgba(255,255,255,.06));
  box-shadow: var(--shadow);
  backdrop-filter: blur(18px);
}
.eyebrow {
  color: var(--primary-2);
  font-size: .72rem;
  font-weight: 850;
  letter-spacing: .13em;
}
h1 { margin: 8px 0 12px; font-size: clamp(1.75rem, 7vw, 2.55rem); line-height:1.16; letter-spacing:-.03em; }
h2 { margin: 30px 0 10px; font-size:1.25rem; }
h3 { margin: 22px 0 8px; font-size:1.03rem; }
p, li { color: var(--muted); line-height: 1.82; }
p { margin: 8px 0 14px; }
ul, ol { padding-left: 1.35rem; }
li + li { margin-top: 6px; }
.lead { color: var(--text); font-size:1.02rem; }

.info-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
  margin-top: 18px;
}
.info-box {
  padding: 15px;
  border: 1px solid var(--line);
  border-radius: 17px;
  background: rgba(255,255,255,.045);
}
.info-box strong { display:block; margin-bottom:5px; }
.info-box p { margin:0; font-size:.87rem; }

.note {
  margin: 20px 0;
  padding: 15px 16px;
  border: 1px solid rgba(93,224,255,.3);
  border-radius: 16px;
  background: rgba(93,224,255,.075);
}
.note.warning { border-color: rgba(255,209,102,.35); background: rgba(255,209,102,.075); }
.note p { margin:0; }

.version-block {
  margin-top: 13px;
  padding: 16px;
  border: 1px solid var(--line);
  border-radius: 17px;
  background: rgba(255,255,255,.045);
}
.version-block h2 { margin:0 0 6px; font-size:1.08rem; }
.version-block time { color:var(--primary-2); font-size:.77rem; }
.version-block ul { margin-bottom:0; }

.link-grid {
  display:grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap:9px;
  margin-top:24px;
}
.page-link {
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:10px;
  min-height:52px;
  padding:11px 13px;
  border:1px solid var(--line);
  border-radius:15px;
  background:rgba(255,255,255,.045);
  color:var(--text);
  text-decoration:none;
  font-weight:750;
}
.page-link span:last-child { color:var(--primary-2); font-size:1.15rem; }

.contact-form { display:grid; gap:14px; margin-top:20px; }
.form-field { display:grid; gap:7px; }
.form-field label { font-weight:750; }
.form-field small { color:var(--muted); }
.form-field input, .form-field textarea, .form-field select {
  width:100%;
  border:1px solid var(--line);
  border-radius:14px;
  padding:12px 13px;
  background:rgba(255,255,255,.06);
  color:var(--text);
  outline:none;
}
.form-field input:focus, .form-field textarea:focus, .form-field select:focus { border-color:var(--primary-2); }
.form-field textarea { min-height:150px; resize:vertical; }
.primary-btn, .secondary-btn {
  min-height:50px;
  border-radius:16px;
  padding:12px 16px;
  font-weight:850;
  cursor:pointer;
}
.primary-btn { border:0; color:#0b0b15; background:linear-gradient(135deg,#8d82ff,#5de0ff); }
.secondary-btn { border:1px solid var(--line); color:var(--text); background:rgba(255,255,255,.06); }
.primary-btn[disabled] { opacity:.5; cursor:not-allowed; }
.contact-actions { display:grid; grid-template-columns:1fr 1.5fr; gap:9px; }
.status-message { color:var(--muted); font-size:.84rem; min-height:1.4em; }

.updated { margin-top:28px; color:var(--muted); font-size:.78rem; }
.site-footer {
  padding:20px 10px 4px;
  text-align:center;
  color:var(--muted);
  font-size:.72rem;
  line-height:1.75;
}
.footer-links { display:flex; justify-content:center; flex-wrap:wrap; gap:4px 11px; margin-top:5px; }
.footer-links a { color:var(--muted); text-decoration:none; }

@media (max-width: 560px) {
  .site-header { align-items:flex-start; }
  .brand-copy span { display:none; }
  .back-btn { padding:8px 10px; font-size:.78rem; }
  .info-grid, .link-grid { grid-template-columns:1fr; }
  .contact-actions { grid-template-columns:1fr; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior:auto !important; transition:none !important; }
}

/* v1.5.1 月間ランキング */
.ranking-setup {
  display: grid;
  gap: 13px;
  margin: 18px 0 24px;
  padding: 16px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: rgba(255,255,255,.045);
}
.ranking-setup-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 9px;
  align-items: end;
}
.ranking-setup label { display: grid; gap: 7px; font-weight: 750; }
.ranking-setup input[type="text"],
.ranking-controls input[type="month"] {
  width: 100%;
  min-height: 46px;
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 10px 12px;
  color: var(--text);
  background: rgba(255,255,255,.06);
  outline: none;
}
.ranking-setup input:focus,
.ranking-controls input:focus { border-color: var(--primary-2); }
.ranking-optin {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
}
.ranking-optin p { margin: 3px 0 0; font-size: .78rem; }
.toggle-input {
  width: 52px;
  height: 30px;
  appearance: none;
  border-radius: 999px;
  background: rgba(255,255,255,.14);
  border: 1px solid var(--line);
  position: relative;
  cursor: pointer;
  flex: 0 0 auto;
}
.toggle-input::after {
  content: "";
  position: absolute;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  top: 3px;
  left: 4px;
  background: #fff;
  transition: transform .18s ease;
}
.toggle-input:checked { background: linear-gradient(135deg, var(--primary), var(--primary-2)); }
.toggle-input:checked::after { transform: translateX(21px); }
.ranking-controls {
  display: grid;
  grid-template-columns: 1fr 150px;
  gap: 10px;
  margin: 18px 0 12px;
}
.mode-tabs {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 7px;
}
.mode-tab {
  min-height: 44px;
  border: 1px solid var(--line);
  border-radius: 13px;
  padding: 8px 5px;
  color: var(--text);
  background: rgba(255,255,255,.045);
  cursor: pointer;
  font-size: .78rem;
  font-weight: 800;
}
.mode-tab.active {
  border-color: rgba(93,224,255,.65);
  background: linear-gradient(135deg, rgba(122,108,255,.32), rgba(93,224,255,.14));
}
.own-rank-card {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 12px;
  margin: 12px 0;
  padding: 14px;
  border: 1px solid rgba(93,224,255,.28);
  border-radius: 17px;
  background: rgba(93,224,255,.07);
}
.own-rank-position {
  min-width: 58px;
  font-size: 1.3rem;
  font-weight: 950;
  color: var(--primary-2);
  text-align: center;
}
.own-rank-main strong { display: block; }
.own-rank-main span { display: block; margin-top: 3px; color: var(--muted); font-size: .76rem; }
.own-rank-value { font-weight: 950; font-variant-numeric: tabular-nums; white-space: nowrap; }
.ranking-table-wrap { overflow-x: auto; margin-top: 12px; }
.ranking-table {
  width: 100%;
  border-collapse: collapse;
  min-width: 520px;
}
.ranking-table th,
.ranking-table td {
  padding: 11px 9px;
  border-bottom: 1px solid var(--line);
  text-align: left;
}
.ranking-table th { color: var(--muted); font-size: .72rem; font-weight: 750; }
.ranking-table td { font-size: .87rem; }
.ranking-table td:first-child { width: 64px; text-align: center; font-weight: 950; }
.ranking-table td:nth-child(3),
.ranking-table th:nth-child(3) { text-align: right; }
.ranking-table td:last-child,
.ranking-table th:last-child { text-align: right; color: var(--muted); }
.ranking-table tr.is-me { background: rgba(93,224,255,.075); }
.ranking-medal { font-size: 1.05rem; }
.ranking-state {
  padding: 25px 12px;
  color: var(--muted);
  text-align: center;
  line-height: 1.7;
}
.ranking-summary { color: var(--muted); font-size: .78rem; }
.ranking-summary strong { color: var(--text); }

@media (max-width: 620px) {
  .ranking-setup-row, .ranking-controls { grid-template-columns: 1fr; }
  .mode-tabs { grid-template-columns: repeat(2, 1fr); }
  .own-rank-card { grid-template-columns: auto 1fr; }
  .own-rank-value { grid-column: 1 / -1; text-align: right; }
}