/* ============================
   common.css — 共通スタイル
   create.html / listen.html 共用
   ============================ */

:root {
  color-scheme: light;
  --bg: #f5efe6;
  --panel: #fffdf9;
  --panel-soft: #fff3e3;
  --ink: #1f1913;
  --muted: #6f6156;
  --primary: #e07b43;
  --secondary: #2c6f6f;
  --accent: #f2c36b;
  --stroke: #e6d7c7;
  --shadow: 0 20px 44px rgba(42, 33, 25, 0.14);
  --radius: 22px;
  --font-body: "M PLUS 1", "Hiragino Sans", "Yu Gothic", "Meiryo", sans-serif;
  --font-display: "Kaisei Opti", "Hiragino Mincho ProN", "Yu Mincho", serif;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: var(--font-body);
  color: var(--ink);
  min-height: 100vh;
}

/* --- Layout --- */

.frame {
  max-width: 1240px;
  margin: 0 auto;
  padding: 24px 24px 60px;
  position: relative;
  z-index: 1;
}

.layout {
  display: grid;
  gap: 24px;
  margin-top: 24px;
}

/* --- Header / Nav --- */

header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 16px 20px;
  background: rgba(255, 253, 249, 0.9);
  border: 1px solid var(--stroke);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  backdrop-filter: blur(6px);
}

.brand {
  display: flex;
  align-items: center;
  gap: 14px;
}

.logo {
  width: 46px;
  height: 46px;
  border-radius: 14px;
  background: conic-gradient(from 140deg, #e07b43, #2c6f6f, #f2c36b, #e07b43);
  display: grid;
  place-items: center;
  color: #fff;
  font-weight: 700;
  letter-spacing: 1px;
}

.brand-title {
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 700;
}

.brand-sub {
  font-size: 12px;
  color: var(--muted);
}

.nav {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.nav a {
  text-decoration: none;
  font-size: 12px;
  font-weight: 700;
  padding: 6px 10px;
  border-radius: 999px;
  border: 1px solid rgba(44, 111, 111, 0.35);
  color: var(--secondary);
  background: rgba(44, 111, 111, 0.12);
}

.nav a.is-active {
  border-color: rgba(224, 123, 67, 0.6);
  color: var(--primary);
  background: rgba(224, 123, 67, 0.15);
}

/* --- Card --- */

.card {
  background: var(--panel);
  border-radius: 24px;
  border: 1px solid var(--stroke);
  padding: 20px;
  box-shadow: var(--shadow);
  display: grid;
  gap: 14px;
  position: relative;
  overflow: hidden;
  animation: float-in 0.8s ease both;
}

/* --- Button --- */

.btn {
  border-radius: 12px;
  padding: 10px 12px;
  border: 1px solid var(--stroke);
  background: #fff;
  font-weight: 700;
  cursor: pointer;
  font-size: 12px;
}

.btn.primary {
  background: var(--secondary);
  color: #f7f1ea;
  border-color: var(--secondary);
  box-shadow: 0 8px 18px rgba(44, 111, 111, 0.25);
}

.btn.warn {
  background: rgba(224, 123, 67, 0.18);
  color: var(--primary);
  border-color: rgba(224, 123, 67, 0.45);
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

/* --- Utilities --- */

.status {
  font-size: 12px;
  color: var(--muted);
}

.status strong {
  color: var(--secondary);
}

.side {
  display: grid;
  gap: 16px;
}

/* --- Keyframes --- */

@keyframes float-in {
  from { opacity: 0; transform: translateY(14px) scale(0.98); }
  to { opacity: 1; transform: translateY(0) scale(1); }
}

/* --- Footer --- */

.site-footer {
  margin-top: 40px;
  padding: 20px 0;
  border-top: 1px solid var(--stroke);
  text-align: center;
  font-size: 12px;
  color: var(--muted);
}

.site-footer a {
  color: var(--secondary);
  text-decoration: none;
}

.site-footer a:hover {
  text-decoration: underline;
}

.footer-links {
  display: flex;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}

/* --- Notes Section --- */

.notes {
  background: var(--panel-soft);
  border-radius: 16px;
  padding: 16px 20px;
  font-size: 13px;
  color: var(--muted);
  line-height: 1.8;
}

.notes-title {
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 8px;
  font-size: 14px;
}

.notes ul {
  margin: 0;
  padding-left: 1.2em;
}

.notes li {
  margin-bottom: 4px;
}

/* --- Disclaimer --- */

.disclaimer {
  background: rgba(44, 111, 111, 0.06);
  border: 1px solid rgba(44, 111, 111, 0.15);
  border-radius: 12px;
  padding: 14px 18px;
  font-size: 13px;
  color: var(--muted);
  line-height: 1.7;
}

.disclaimer strong {
  color: var(--secondary);
}