:root {
  --bg: #faf4ea;      /* 温かいアイボリー */
  --ink: #3b302a;     /* 温かいダークブラウン */
  --ink-soft: #8a7b6d;
  --line: #ece0cf;
  --card: #fffdf7;
  --a: #5f9b86;       /* あなた = やわらかいセージグリーン */
  --a-soft: #e8f1ec;
  --b: #cf7e63;       /* 相手 = 温かいテラコッタ */
  --b-soft: #f8ebe4;
  --accent: #c98a4a;  /* メイン = 温かいハニー */
  --danger: #b2503f;
  --radius: 20px;
  --shadow: 0 12px 34px rgba(120, 84, 52, 0.12);  /* 温かい影 */
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html, body { height: 100%; }

body {
  font-family: "Zen Maru Gothic", -apple-system, BlinkMacSystemFont, "Hiragino Maru Gothic ProN", "Hiragino Sans", "Noto Sans JP", system-ui, sans-serif;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}

/* 二つの色が中央で出会う背景 = "あいだ" のモチーフ */
.bridge-bg {
  position: fixed;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(60% 50% at 0% 0%, rgba(95, 155, 134, 0.12), transparent 60%),
    radial-gradient(70% 55% at 100% 100%, rgba(207, 126, 99, 0.14), transparent 60%),
    radial-gradient(80% 60% at 50% 50%, rgba(201, 138, 74, 0.06), transparent 70%);
}

#app { max-width: 640px; margin: 0 auto; padding: 28px 20px 64px; }

.screen { display: none; animation: fade 0.4s ease; }
.screen.active { display: block; }
@keyframes fade { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: none; } }

/* ヒーロー */
.hero { text-align: center; padding: 26px 6px 18px; }
.logo {
  font-size: 2.6rem;
  letter-spacing: 0.16em;
  font-weight: 700;
  background: linear-gradient(100deg, var(--a), var(--b));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.tagline { color: var(--ink-soft); margin-top: 14px; font-size: 0.98rem; }
.tagline em { font-style: normal; color: var(--accent); font-weight: 600; }

/* カード */
.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 22px 18px;
  margin-top: 22px;
}
.card-title { font-size: 1.05rem; margin-bottom: 14px; }

/* 関係の選択 */
.relations { display: grid; grid-template-columns: repeat(2, 1fr); gap: 10px; }
.rel {
  border: 1.5px solid var(--line);
  background: #fff;
  border-radius: 14px;
  padding: 14px 10px;
  text-align: center;
  cursor: pointer;
  transition: all 0.18s ease;
  font-size: 0.95rem;
}
.rel:hover { border-color: var(--accent); }
.rel.selected {
  border-color: var(--accent);
  background: var(--a-soft);
  box-shadow: inset 0 0 0 1px var(--accent);
}
.rel .emo { display: block; font-size: 1.5rem; margin-bottom: 4px; }

/* ボタン */
.actions { margin-top: 20px; }
.actions.sticky {
  position: sticky;
  bottom: 0;
  background: linear-gradient(to top, var(--bg) 70%, transparent);
  padding-top: 14px;
  padding-bottom: max(10px, env(safe-area-inset-bottom));
}
.btn {
  font: inherit;
  border: none;
  border-radius: 999px;
  padding: 14px 22px;
  cursor: pointer;
  font-weight: 600;
  transition: transform 0.1s ease, opacity 0.2s ease, background 0.2s;
  width: 100%;
}
.btn:active { transform: scale(0.98); }
.btn.primary { background: var(--accent); color: #fff; }
.btn.primary:disabled { background: #c9cdcb; cursor: not-allowed; }
.btn.ghost { background: #fff; color: var(--ink); border: 1.5px solid var(--line); }
.btn.tiny { width: auto; padding: 6px 12px; font-size: 0.8rem; background: rgba(255,255,255,0.7); color: var(--ink); }

.divider { text-align: center; color: var(--ink-soft); margin: 16px 0; position: relative; font-size: 0.85rem; }
.divider::before, .divider::after {
  content: ""; position: absolute; top: 50%; width: 38%; height: 1px; background: var(--line);
}
.divider::before { left: 0; } .divider::after { right: 0; }

.join-row { display: flex; gap: 8px; }
.join-row input {
  flex: 1; font: inherit; padding: 13px 14px; border: 1.5px solid var(--line);
  border-radius: 12px; text-transform: uppercase; letter-spacing: 0.2em; text-align: center;
}
.join-row .btn { width: auto; padding: 13px 18px; }

.hint { color: var(--ink-soft); font-size: 0.85rem; margin-top: 10px; min-height: 1.2em; text-align: center; }
.hint.error { color: var(--danger); }
.note { text-align: center; color: var(--ink-soft); font-size: 0.8rem; margin-top: 22px; }

/* コードバナー */
.code-banner {
  display: flex; align-items: center; gap: 10px; justify-content: center;
  background: var(--a-soft); border: 1px dashed var(--a);
  border-radius: 12px; padding: 12px; margin-bottom: 18px; flex-wrap: wrap;
}
.code-banner span { font-size: 0.82rem; color: var(--ink-soft); }
.code-banner strong { font-size: 1.4rem; letter-spacing: 0.3em; color: var(--a); }
.code-banner.inline { margin-top: 18px; }

/* 質問 */
.q-header { margin-bottom: 18px; }
.q-header h2 { font-size: 1.3rem; }
.q-sub { color: var(--ink-soft); font-size: 0.9rem; margin-top: 6px; }
.q-form { display: flex; flex-direction: column; gap: 16px; }
.q-item {
  background: var(--card); border: 1px solid var(--line);
  border-radius: 14px; padding: 16px;
}
.q-item label { display: block; font-weight: 600; margin-bottom: 10px; font-size: 0.98rem; }
.q-item textarea {
  width: 100%; font: inherit; border: 1.5px solid var(--line); border-radius: 10px;
  padding: 12px; resize: vertical; min-height: 76px; background: #fff; line-height: 1.6;
}
.q-item textarea:focus { outline: none; border-color: var(--accent); }

/* 待機 */
.waiting { text-align: center; padding: 56px 12px; }
.waiting h2 { font-size: 1.25rem; margin-top: 18px; }
.pulse { display: flex; gap: 10px; justify-content: center; }
.pulse span {
  width: 12px; height: 12px; border-radius: 50%; background: var(--accent);
  animation: bob 1.2s infinite ease-in-out;
}
.pulse span:nth-child(2) { background: var(--b); animation-delay: 0.2s; }
.pulse span:nth-child(3) { animation-delay: 0.4s; }
@keyframes bob { 0%, 100% { transform: translateY(0); opacity: 0.4; } 50% { transform: translateY(-10px); opacity: 1; } }

/* 結果 */
.r-header { text-align: center; margin: 8px 0 20px; }
.r-header h2 {
  font-size: 1.5rem; letter-spacing: 0.06em;
  background: linear-gradient(100deg, var(--a), var(--b));
  -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent;
}
.r-header .r-sub { color: var(--ink-soft); font-size: 0.88rem; margin-top: 8px; }
.result { display: flex; flex-direction: column; gap: 14px; }

/* 問いごとの対話カード */
.exchanges { display: flex; flex-direction: column; gap: 14px; }
.exchange {
  background: var(--card); border: 1px solid var(--line);
  border-radius: 16px; padding: 16px; box-shadow: var(--shadow);
}
.exchange .q { font-weight: 700; font-size: 0.98rem; margin-bottom: 12px; line-height: 1.5; }
.exchange .ans {
  border-radius: 12px; padding: 10px 12px; margin-bottom: 8px;
}
.exchange .ans .who {
  display: inline-block; font-size: 0.72rem; font-weight: 700;
  padding: 2px 8px; border-radius: 999px; margin-bottom: 6px;
}
.exchange .ans .a-text { font-size: 0.94rem; line-height: 1.6; }
.exchange .ans.you { background: var(--a-soft); }
.exchange .ans.you .who { background: var(--a); color: #fff; }
.exchange .ans.them { background: var(--b-soft); }
.exchange .ans.them .who { background: var(--b); color: #fff; }
.exchange .bridge {
  margin-top: 12px; padding: 12px;
  border-left: 3px solid var(--accent);
  background: linear-gradient(100deg, var(--a-soft), var(--b-soft));
  border-radius: 8px;
}
.exchange .bridge .label {
  display: inline-block; font-size: 0.72rem; font-weight: 700; letter-spacing: 0.12em;
  color: var(--accent); margin-bottom: 6px;
}
.exchange .bridge .b-text { font-size: 0.95rem; line-height: 1.7; }
.r-block.closing { border-left: 4px solid var(--b); }
.r-block {
  background: var(--card); border: 1px solid var(--line);
  border-radius: 16px; padding: 18px; box-shadow: var(--shadow);
}
.r-block h3 { font-size: 1rem; margin-bottom: 10px; }
.r-block.common { border-left: 4px solid var(--accent); }
.r-block.common ul { list-style: none; display: flex; flex-direction: column; gap: 10px; }
.r-block.common li { position: relative; padding-left: 22px; }
.r-block.common li::before { content: "✦"; position: absolute; left: 0; color: var(--accent); }
.r-twin { display: grid; grid-template-columns: 1fr; gap: 14px; }
.r-block.heart#r-a { border-top: 3px solid var(--a); }
.r-block.heart#r-b { border-top: 3px solid var(--b); }
.r-block.step { border-left: 4px solid var(--b); }

.safety {
  background: #fff4f3; border: 1px solid var(--danger); color: #7a2630;
  border-radius: 14px; padding: 16px; margin-bottom: 16px; font-size: 0.92rem;
}

@media (min-width: 560px) {
  .r-twin { grid-template-columns: 1fr 1fr; }
}