:root {
  --bg: #f4efe7;
  --ink: #1c1f2a;
  --muted: #5a6272;
  --accent: #2a9d8f;
  --accent-dark: #1e7f73;
  --sun: #f4c95d;
  --card: rgba(255, 255, 255, 0.88);
  --shadow: 0 20px 50px rgba(20, 24, 34, 0.15);
  --border: rgba(28, 31, 42, 0.08);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Zen Kaku Gothic New", sans-serif;
  color: var(--ink);
  background: radial-gradient(circle at top left, #fcefd6 0%, #f4efe7 35%, #e9f1f3 100%);
}

.ambient {
  position: fixed;
  inset: 0;
  background: radial-gradient(circle at 80% 20%, rgba(42, 157, 143, 0.15), transparent 45%),
    radial-gradient(circle at 20% 80%, rgba(244, 201, 93, 0.2), transparent 45%);
  pointer-events: none;
  z-index: 0;
}

.hero {
  position: relative;
  z-index: 1;
  padding: 48px 20px 32px;
  text-align: center;
}

.badge {
  display: inline-block;
  padding: 6px 14px;
  border-radius: 999px;
  background: rgba(42, 157, 143, 0.15);
  color: var(--accent-dark);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.02em;
  margin-bottom: 12px;
}

.hero h1 {
  margin: 0;
  font-family: "Shippori Mincho", serif;
  font-size: clamp(24px, 6vw, 38px);
  letter-spacing: 0.02em;
}

.hero p {
  margin: 12px 0 18px;
  color: var(--muted);
  line-height: 1.7;
}

.hero-actions {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
}

.container {
  position: relative;
  z-index: 1;
  max-width: 900px;
  margin: 0 auto 60px;
  padding: 0 20px 40px;
  display: grid;
  gap: 18px;
}

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 18px;
  padding: 20px;
  box-shadow: var(--shadow);
  backdrop-filter: blur(6px);
  animation: fadeUp 0.6s ease both;
}

.card:nth-child(2) { animation-delay: 0.08s; }
.card:nth-child(3) { animation-delay: 0.16s; }
.card:nth-child(4) { animation-delay: 0.24s; }
.card:nth-child(5) { animation-delay: 0.32s; }

.card-head h2 {
  margin: 0 0 6px;
  font-size: 20px;
}

.card-head .sub {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
}

.options {
  display: grid;
  gap: 10px;
  margin-top: 14px;
}

.phrase-row {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 10px;
  align-items: center;
}

.option-btn {
  padding: 12px 14px;
  border-radius: 12px;
  border: 1px solid transparent;
  background: #fff;
  box-shadow: 0 10px 20px rgba(28, 31, 42, 0.08);
  font-weight: 600;
  cursor: pointer;
  transition: transform 0.2s ease, box-shadow 0.2s ease, border 0.2s ease;
  text-align: left;
}

.option-btn:hover {
  transform: translateY(-1px);
  box-shadow: 0 14px 22px rgba(28, 31, 42, 0.12);
}

.option-btn.selected {
  border-color: var(--accent);
  background: rgba(42, 157, 143, 0.08);
}

.volume {
  display: flex;
  align-items: center;
  gap: 14px;
  flex-wrap: wrap;
  margin-top: 12px;
}

.volume-bar {
  flex: 1;
  min-width: 180px;
  height: 12px;
  border-radius: 999px;
  background: rgba(28, 31, 42, 0.1);
  overflow: hidden;
}

.volume-fill {
  display: block;
  height: 100%;
  width: 65%;
  background: linear-gradient(90deg, rgba(42, 157, 143, 0.6), rgba(244, 201, 93, 0.8));
  border-radius: inherit;
}

.controls {
  display: flex;
  gap: 12px;
  margin-top: 16px;
  flex-wrap: wrap;
}

.btn {
  border: none;
  border-radius: 999px;
  padding: 12px 20px;
  font-weight: 700;
  cursor: pointer;
  background: #fff;
  color: var(--ink);
  box-shadow: 0 12px 22px rgba(28, 31, 42, 0.12);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.btn.small {
  padding: 10px 16px;
  font-size: 13px;
}

.btn:hover {
  transform: translateY(-1px);
  box-shadow: 0 16px 24px rgba(28, 31, 42, 0.16);
}

.btn.primary {
  background: linear-gradient(120deg, var(--accent), #3bc6b6);
  color: #fff;
}

.btn.ghost {
  background: rgba(28, 31, 42, 0.05);
}

.status {
  margin-top: 12px;
  font-weight: 600;
  color: var(--accent-dark);
}

.error {
  margin-top: 10px;
  color: #c0392b;
  font-weight: 600;
  min-height: 22px;
}

.note {
  margin: 12px 0 0;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.6;
}

.subtle {
  background: rgba(255, 255, 255, 0.6);
}

.list {
  margin: 12px 0 0;
  padding-left: 18px;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.6;
}

.footer {
  text-align: center;
  padding: 20px;
  color: var(--muted);
  font-size: 12px;
}

@keyframes fadeUp {
  from {
    opacity: 0;
    transform: translateY(12px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (min-width: 720px) {
  .options {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .hero h1 {
    font-size: 46px;
  }
}