:root {
  --bg: #f6f7fb;
  --bg-2: #ffffff;
  --fg: #1c2030;
  --fg-dim: #5b6478;
  --line: #e3e7f0;
  --accent: #da251d;      /* ベトナム国旗の赤 */
  --accent-2: #ffcd00;    /* 星の黄 */
  --ok: #12a37c;
  --ng: #e0393e;
  --warn: #d98324;
  --shadow: 0 12px 30px rgba(24, 32, 60, .10);
  --radius: 18px;
  --pad: clamp(16px, 3vw, 28px);   /* カードの内側余白 */
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #12141c;
    --bg-2: #1b1e29;
    --fg: #eef1f8;
    --fg-dim: #a2abc0;
    --line: #2b3040;
    --shadow: 0 12px 30px rgba(0, 0, 0, .45);
  }
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }
/* 入力欄やボタンにも本文のフォントを効かせる（既定だと OS のフォームフォントになる） */
input, button, select, textarea { font-family: inherit; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--fg);
  /* ベトナム語は Be Vietnam Pro（声調記号の設計が丁寧）、日本語は以降にフォールバック */
  font-family: "Be Vietnam Pro", "Hiragino Sans", "Noto Sans JP", "Yu Gothic UI", system-ui, -apple-system, "Segoe UI", sans-serif;
  line-height: 1.6;
}

/* 国旗マーク（絵文字の国旗は Windows で表示されないため CSS で描く） */
.flag {
  display: inline-flex; align-items: center; justify-content: center;
  background: var(--accent); color: var(--accent-2); line-height: 1;
}
.gate-mark { width: 68px; height: 46px; border-radius: 10px; font-size: 28px; }

.icon-btn {
  border: 1px solid var(--line); background: transparent; color: inherit;
  width: 30px; height: 26px; border-radius: 8px; font-size: 13px; cursor: pointer;
  display: inline-flex; align-items: center; justify-content: center;
}
.icon-btn:hover { background: var(--bg); }

.progress-track { height: 4px; background: var(--line); position: sticky; top: 0; z-index: 19; }
.progress-bar { height: 100%; width: 0; background: linear-gradient(90deg, var(--accent), var(--accent-2)); transition: width .4s ease; }

/* 404 ページ（すぐトップへ飛ぶので、ちらっと見えるだけ） */
.notfound { text-align: center; margin-top: 10vh; }
.notfound h1 { font-size: 20px; margin: 12px 0 8px; }
.notfound p { margin: 6px 0; color: var(--fg-dim); font-size: 14px; }
.notfound a { text-decoration: none; display: inline-block; margin-top: 10px; }

/* JS 無しのときだけ表示される案内 */
.noscript {
  max-width: 720px; margin: 0 auto; padding: 24px 16px;
  font-size: 14px; line-height: 1.7;
}
.noscript h2 { font-size: 18px; margin: 0 0 10px; }
.noscript ol { padding-inline-start: 22px; }
.noscript li { margin-bottom: 6px; }
.ns-keys {
  font-family: ui-monospace, "SFMono-Regular", Consolas, monospace;
  font-size: 12px; color: var(--fg-dim);
}

/* ---------- カード ---------- */
/* 下余白を 0 にすると、最下部まで送っても貼り付いた入力欄の位置がずれない */
.stage { padding: clamp(16px, 4vw, 36px) 16px 0; display: flex; justify-content: center; }
.card {
  width: min(720px, 100%);
  background: var(--bg-2);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: var(--pad);
}
.card.success { box-shadow: 0 0 0 3px rgba(18, 163, 124, .35), var(--shadow); }

/* ---------- イメージ画像 ---------- */
.art { margin: 0 0 18px; }
.art-scene {
  position: relative;
  height: clamp(140px, 26vw, 190px);
  border-radius: 14px;
  background: linear-gradient(140deg, var(--c1, #ddd), var(--c2, #999));
  display: flex; align-items: center; justify-content: center;
  overflow: hidden;
}
.art-scene::after {
  content: ""; position: absolute; inset: 0;
  background: radial-gradient(circle at 30% 20%, rgba(255, 255, 255, .45), transparent 55%);
}
.art-main { font-size: clamp(56px, 12vw, 84px); filter: drop-shadow(0 6px 10px rgba(0, 0, 0, .2)); z-index: 1; }
.art-sub { position: absolute; font-size: clamp(24px, 5vw, 34px); opacity: .75; }
.art-sub-a { top: 14%; left: 12%; animation: float 5s ease-in-out infinite; }
.art-sub-b { bottom: 14%; right: 12%; animation: float 6s ease-in-out infinite reverse; }
@keyframes float { 50% { transform: translateY(-10px); } }
.art-caption { margin: 8px 2px 0; font-size: 11px; color: var(--fg-dim); letter-spacing: .08em; text-transform: uppercase; }

/* ---------- リコール & フレーズ ---------- */
.phrase-zone { min-height: 96px; display: flex; flex-direction: column; justify-content: center; }
.recall {
  display: flex; align-items: center; gap: 14px;
  border: 1px dashed var(--line); border-radius: 14px; padding: 14px 16px;
  background: linear-gradient(180deg, rgba(218, 37, 29, .05), transparent);
}
.recall-ring { position: relative; width: 48px; height: 48px; flex: none; }
.recall-ring svg { width: 48px; height: 48px; transform: rotate(-90deg); }
.ring-bg { fill: none; stroke: var(--line); stroke-width: 4; }
.ring-fg { fill: none; stroke: var(--accent); stroke-width: 4; stroke-linecap: round; }
.recall-count {
  position: absolute; inset: 0; display: flex; align-items: center; justify-content: center;
  font-size: 15px; font-weight: 700; font-variant-numeric: tabular-nums;
}
.recall-text { display: flex; flex-direction: column; flex: 1; }
.recall-text strong { font-size: 15px; }
.recall-text span { font-size: 12px; color: var(--fg-dim); }

.phrase {
  margin: 0; font-size: clamp(26px, 6vw, 40px); font-weight: 700; letter-spacing: .01em;
  white-space: pre-wrap; word-break: break-word; text-align: center;
}
.card.revealed .phrase { animation: pop .45s ease; }
@keyframes pop { from { opacity: 0; transform: translateY(10px) scale(.96); } }
.phrase .pending { color: var(--fg-dim); opacity: .55; }
.phrase .ok { color: var(--ok); }
.phrase .ng { color: var(--ng); text-decoration: underline wavy var(--ng) 1px; }
/* 記号だけが違うとき: 文字全体を赤で描き、合っている部分を緑で重ねて記号だけ赤く見せる */
.phrase .mark-ng { display: inline-block; position: relative; color: var(--ng); }
.phrase .mark-ng::after {
  content: attr(data-base);
  position: absolute; left: 0; top: 0;
  color: var(--ok);
}
.phrase.correct { color: var(--ok); }
.phrase-ipa { text-align: center; color: var(--fg-dim); margin: 4px 0 0; }

/* ---------- 入力 ---------- */
/* スクロール中はフッターのすぐ上に貼り付き、カード末尾まで来ると本来の位置に戻る */
.input-dock {
  position: sticky; bottom: 0; z-index: 15;
  margin: 18px calc(-1 * var(--pad)) calc(-1 * var(--pad));
  padding: 10px var(--pad);
  border-radius: 0 0 var(--radius) var(--radius);
  background: var(--bg-2);
  box-shadow: 0 -12px 16px -12px rgba(0, 0, 0, .35);
}
.input-row { display: flex; gap: 10px; }
.answer {
  flex: 1; padding: 14px 16px; font-size: 19px;
  border: 2px solid var(--line); border-radius: 14px;
  background: var(--bg); color: var(--fg); outline: none;
}
.answer:focus { border-color: var(--accent); background: var(--bg-2); }
.answer:disabled { opacity: .5; }
.mic-btn {
  width: 56px; flex: none; font-size: 22px; cursor: pointer;
  border: 2px solid var(--line); border-radius: 14px; background: var(--bg); color: inherit;
}
.mic-btn.on { border-color: var(--ng); animation: pulse 1.2s infinite; }
@keyframes pulse { 50% { box-shadow: 0 0 0 8px rgba(224, 57, 62, .15); } }

/* 入力欄の下に出す TELEX の打ち方 */
.telex-hint {
  display: flex; align-items: center; gap: 8px; flex-wrap: wrap;
  margin-top: 8px; animation: hintin .25s ease;
}
@keyframes hintin { from { opacity: 0; transform: translateY(-4px); } }
.telex-hint-label {
  font-size: 10px; letter-spacing: .1em; color: var(--fg-dim);
  border: 1px solid var(--line); border-radius: 999px; padding: 1px 8px;
}
.telex-seq {
  flex: 1; min-width: 0;
  font-family: ui-monospace, "SFMono-Regular", Consolas, monospace; font-size: 14px; letter-spacing: .02em;
  background: var(--bg); border: 1px solid var(--line); border-radius: 8px; padding: 4px 10px;
  white-space: pre-wrap; word-break: break-word;
}
.telex-seq .done { color: var(--ok); font-weight: 700; }
.telex-seq .rest { color: var(--fg-dim); }

.input-foot { display: flex; align-items: center; gap: 10px; }
.input-status { flex: 1; min-width: 0; min-height: 22px; font-size: 13px; color: var(--fg-dim); }
.input-status.is-ok { color: var(--ok); }
.input-status.is-ng, .input-status.is-warn { color: var(--warn); }
.input-status.is-listening { color: var(--ng); }
.input-status.is-speaking { color: var(--fg-dim); }

.ghost-btn {
  border: 1px solid var(--line); background: transparent; color: inherit;
  padding: 8px 12px; border-radius: 999px; font-size: 13px; cursor: pointer;
}
.ghost-btn:hover { background: var(--bg); border-color: var(--fg-dim); }
.primary-btn {
  border: none; background: var(--accent); color: #fff;
  padding: 10px 18px; border-radius: 999px; font-size: 14px; font-weight: 700; cursor: pointer;
}
.primary-btn.big { padding: 14px 28px; font-size: 16px; }
.primary-btn:hover { filter: brightness(1.08); }

/* ---------- 意味・品詞分解 ---------- */
.meaning { margin-top: 8px; }
.ja { margin: 0; font-size: 18px; font-weight: 600; text-align: center; }

.breakdown { margin-top: 16px; transition: filter .3s, opacity .3s; }
.breakdown.blurred { filter: blur(7px); opacity: .5; pointer-events: none; user-select: none; }
.words { list-style: none; margin: 0 0 14px; padding: 0; display: flex; flex-direction: column; gap: 8px; }
.word {
  display: grid; grid-template-columns: minmax(90px, auto) auto 1fr; align-items: baseline; gap: 6px 10px;
  padding: 8px 12px; border: 1px solid var(--line); border-radius: 12px; background: var(--bg);
}
.word-vi { font-size: 16px; font-weight: 700; }
.word-pos { font-size: 10px; color: var(--fg-dim); border: 1px solid var(--line); border-radius: 999px; padding: 1px 8px; background: var(--bg-2); }
.word-ja { font-size: 14px; }
.word-note { grid-column: 1 / -1; font-size: 12px; color: var(--fg-dim); }
.note { margin: 0; font-size: 13px; color: var(--fg-dim); background: var(--bg); border-inline-start: 3px solid var(--accent-2); padding: 10px 12px; border-radius: 0 10px 10px 0; }

/* ---------- toast ---------- */
.toasts {
  position: fixed; top: 16px; inset-inline-end: 16px; z-index: 60;
  display: flex; flex-direction: column; gap: 10px; width: min(300px, calc(100vw - 32px));
}
.toast {
  background: var(--bg-2); border: 1px solid var(--line); border-inline-start: 4px solid var(--fg-dim);
  border-radius: 12px; box-shadow: var(--shadow); padding: 12px 14px;
  animation: slidein .3s ease; transition: opacity .35s, transform .35s;
}
.toast.out { opacity: 0; transform: translateX(20px); }
@keyframes slidein { from { opacity: 0; transform: translateX(24px); } }
.toast-success { border-inline-start-color: var(--ok); }
.toast-error { border-inline-start-color: var(--ng); }
.toast-info { border-inline-start-color: #4a6cf7; }
.toast-head { display: flex; align-items: center; gap: 8px; }
.toast-icon { font-size: 16px; }
.toast-title { font-weight: 700; font-size: 14px; }
.toast-body { font-size: 13px; color: var(--fg-dim); margin-top: 6px; white-space: pre-line; overflow-wrap: anywhere; }
.toast-foot { font-size: 11px; color: var(--fg-dim); margin-top: 8px; }

/* ---------- 起動ゲート ---------- */
.gate {
  position: fixed; inset: 0; z-index: 80;
  background: rgba(12, 14, 22, .78); backdrop-filter: blur(6px);
  display: flex; align-items: center; justify-content: center; padding: 20px;
  transition: opacity .3s;
}
.gate.hidden { opacity: 0; pointer-events: none; }
.gate-inner {
  background: var(--bg-2); border-radius: var(--radius); padding: clamp(22px, 5vw, 36px);
  width: min(480px, 100%); text-align: center; box-shadow: var(--shadow);
}
.gate-inner h1 { margin: 12px 0 16px; font-size: 20px; }
.gate-steps { text-align: left; font-size: 13px; color: var(--fg-dim); margin: 0 0 22px; padding-left: 20px; display: flex; flex-direction: column; gap: 6px; }
.gate-steps strong { color: var(--fg); }
.gate-steps code {
  font-family: ui-monospace, "SFMono-Regular", Consolas, monospace;
  background: var(--bg); border: 1px solid var(--line); border-radius: 5px; padding: 0 5px; color: var(--fg);
}
.gate-note { font-size: 11px; color: var(--fg-dim); margin: 14px 0 0; }
.gate-source {
  display: inline-flex; align-items: center; gap: 6px; margin-top: 14px;
  font-size: 12px; color: var(--fg-dim); text-decoration: none;
  border: 1px solid var(--line); border-radius: 999px; padding: 5px 12px;
}
.gate-source:hover { color: var(--fg); border-color: var(--fg-dim); background: var(--bg); }
.gate-source svg { flex: none; }
.gate-lang {
  display: flex; align-items: center; justify-content: center; gap: 8px;
  font-size: 12px; color: var(--fg-dim); margin: 0 0 18px;
}
.gate-lang select {
  padding: 6px 10px; border-radius: 10px; border: 1px solid var(--line);
  background: var(--bg); color: var(--fg); font-size: 13px;
}

/* ---------- 設定 ---------- */
.sheet {
  border: 1px solid var(--line); border-radius: var(--radius); padding: 0;
  background: var(--bg-2); color: var(--fg); width: min(420px, calc(100vw - 32px)); box-shadow: var(--shadow);
}
.sheet::backdrop { background: rgba(12, 14, 22, .6); }
.sheet form { padding: 22px; display: flex; flex-direction: column; gap: 14px; }
.sheet h2 { margin: 0; font-size: 17px; }
.field { display: flex; flex-direction: column; gap: 6px; font-size: 13px; }
.field em { font-style: normal; color: var(--accent); font-weight: 700; margin-left: 8px; }
.field input[type=range] { width: 100%; accent-color: var(--accent); }
.field select { padding: 8px; border-radius: 10px; border: 1px solid var(--line); background: var(--bg); color: var(--fg); }
.check { display: flex; align-items: center; gap: 8px; font-size: 13px; }
.check input { accent-color: var(--accent); width: 16px; height: 16px; }
.sheet-actions { display: flex; justify-content: space-between; gap: 10px; margin-top: 6px; }

@media (max-width: 560px) {
  .toasts { top: 12px; right: 12px; left: 12px; width: auto; }
  .word { grid-template-columns: 1fr; }
}