/* =========================================================
   ベトナム語の森｜デザインシステム "Cờ Đỏ Sao Vàng"
   赤=旅行 / 緑=学習 / 金=達成（面で使わない）
   指示書v1 11章のトークンに準拠
   ========================================================= */

:root {
  --do: #DA251D;          /* 国旗の赤＝旅行 */
  --do-dam: #A81B15;      /* 赤の影（ボタン底面） */
  --do-nhat: #FBEAE9;     /* 赤の薄地 */
  --vang: #FFCD00;        /* 金星イエロー＝達成アクセント限定 */
  --giay: #FDF9F5;        /* ページ背景 */
  --muc: #2A2430;         /* テキスト */
  --muc-nhat: #6E6575;    /* サブテキスト */
  --rung: #157A55;        /* 森の緑＝学習 */
  --rung-dam: #0E5A3E;
  --line: #F0E3DD;        /* ボーダー */
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--giay);
  color: var(--muc);
  font-family: "Noto Sans JP", "Be Vietnam Pro", sans-serif;
  font-weight: 400;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, .btn, .brand-name, .door-title {
  font-family: "M PLUS Rounded 1c", "Be Vietnam Pro", sans-serif;
  font-weight: 800;
  line-height: 1.35;
}

/* ベトナム語表記（声調記号の描画を優先） */
.vn {
  font-family: "Be Vietnam Pro", "Noto Sans JP", sans-serif;
  font-weight: 600;
}

a { color: inherit; text-decoration: none; }

.container {
  max-width: 1040px;
  margin: 0 auto;
  padding: 0 20px;
}

/* ---------- ヘッダー ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(253, 249, 245, 0.92);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 12px 20px;
  max-width: 1040px;
  margin: 0 auto;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
}

/* 国旗チップ：赤地に金星 */
.brand-flag {
  width: 34px;
  height: 24px;
  border-radius: 6px;
  background: var(--do);
  display: grid;
  place-items: center;
  color: var(--vang);
  font-size: 13px;
  line-height: 1;
  box-shadow: 0 1px 0 var(--do-dam);
  flex-shrink: 0;
}

.brand-name { font-size: 18px; }

.global-nav {
  display: flex;
  gap: 4px;
  font-family: "M PLUS Rounded 1c", sans-serif;
  font-weight: 700;
  font-size: 14px;
}

.global-nav a {
  padding: 8px 12px;
  border-radius: 999px;
  transition: background-color .15s ease;
}

.global-nav a.nav-do:hover { background: var(--do-nhat); color: var(--do); }
.global-nav a.nav-rung:hover { background: #E7F2ED; color: var(--rung); }
.global-nav a.nav-plain:hover { background: #F3EDE8; }

/* ---------- 押し込みボタン ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 26px;
  border-radius: 16px;
  border: none;
  font-size: 16px;
  font-weight: 800;
  cursor: pointer;
  transition: transform .08s ease, box-shadow .08s ease;
}

.btn-do {
  background: var(--do);
  color: #fff;
  box-shadow: 0 4px 0 var(--do-dam);
}

.btn-rung {
  background: var(--rung);
  color: #fff;
  box-shadow: 0 4px 0 var(--rung-dam);
}

.btn-ghost {
  background: #fff;
  color: var(--muc);
  box-shadow: 0 4px 0 var(--line);
  border: 1px solid var(--line);
}

.btn:hover { filter: brightness(1.05); }

.btn:active {
  transform: translateY(4px);
  box-shadow: 0 0 0 transparent;
}

.btn:focus-visible,
a:focus-visible {
  outline: 3px solid var(--rung);
  outline-offset: 2px;
}

/* ---------- ヒーロー「金星カード」 ---------- */
.hero { padding: 40px 0 56px; }

.hero-card {
  border-radius: 24px;
  overflow: hidden;
  box-shadow: 0 10px 30px rgba(42, 36, 48, 0.10);
  border: 1px solid var(--line);
  background: #fff;
}

.hero-top {
  position: relative;
  background: linear-gradient(135deg, var(--do) 0%, #C51F17 100%);
  color: #fff;
  padding: 52px 40px 60px;
  overflow: hidden;
}

/* 金星の透かし */
.hero-star {
  position: absolute;
  right: -40px;
  top: -55px;
  font-size: 260px;
  line-height: 1;
  color: var(--vang);
  opacity: 0.16;
  pointer-events: none;
  user-select: none;
  transform: rotate(12deg);
}

.hero-chip {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(255, 255, 255, 0.16);
  border: 1px solid rgba(255, 255, 255, 0.35);
  color: #fff;
  border-radius: 999px;
  padding: 6px 14px;
  font-size: 14px;
  font-weight: 700;
  margin-bottom: 18px;
}

.hero-chip .star { color: var(--vang); }

.hero-title {
  margin: 0 0 12px;
  font-size: clamp(28px, 5vw, 44px);
  position: relative;
  z-index: 1;
}

.hero-lead {
  margin: 0;
  max-width: 560px;
  font-size: 16px;
  opacity: 0.94;
  position: relative;
  z-index: 1;
}

.hero-bottom {
  background: #fff;
  padding: 26px 40px 30px;
}

.hero-bottom-label {
  margin: 0 0 14px;
  font-size: 14px;
  font-weight: 700;
  color: var(--muc-nhat);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

/* ---------- カード共通 ---------- */
.card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 20px;
  padding: 26px;
  transition: transform .15s ease, box-shadow .15s ease;
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 24px rgba(42, 36, 48, 0.08);
}

/* ---------- セクション ---------- */
.section { padding: 28px 0 44px; }

.section-chip {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  border-radius: 999px;
  padding: 6px 14px;
  font-size: 13px;
  font-weight: 800;
  margin-bottom: 14px;
}

.section-chip.chip-do { background: var(--do-nhat); color: var(--do); }
.section-chip.chip-rung { background: #E7F2ED; color: var(--rung); }
.section-chip.chip-vang { background: #FFF6D6; color: #8A6D00; }

.section-title {
  margin: 0 0 8px;
  font-size: clamp(22px, 3.4vw, 30px);
}

.section-lead {
  margin: 0 0 24px;
  color: var(--muc-nhat);
  font-size: 15px;
}

/* ---------- 二枚扉 ---------- */
.doors {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.door { border-top: 6px solid; }

.door-do { border-top-color: var(--do); }
.door-rung { border-top-color: var(--rung); }

.door-emoji { font-size: 34px; line-height: 1; }

.door-title {
  font-size: 21px;
  margin: 12px 0 4px;
}

.door-for {
  font-size: 13px;
  font-weight: 700;
  margin: 0 0 10px;
}

.door-do .door-for { color: var(--do); }
.door-rung .door-for { color: var(--rung); }

.door-text {
  margin: 0 0 18px;
  font-size: 14.5px;
  color: var(--muc-nhat);
}

/* ---------- 声調ミニ体験 ---------- */
.tone-strip {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 18px 0 20px;
}

.tone-badge {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 14px 18px;
  text-align: center;
  min-width: 108px;
  flex: 1;
}

.tone-badge .tone-word {
  display: block;
  font-family: "Be Vietnam Pro", sans-serif;
  font-size: 26px;
  font-weight: 700;
  line-height: 1.2;
}

.tone-badge .tone-name {
  display: block;
  font-size: 11px;
  font-weight: 700;
  color: var(--muc-nhat);
  margin-top: 2px;
}

.tone-badge .tone-mean {
  display: block;
  font-size: 13px;
  margin-top: 6px;
}

.tone-badge.is-merged { border-color: var(--vang); background: #FFFBEB; }

.tone-note {
  font-size: 13px;
  color: var(--muc-nhat);
  margin: 0 0 20px;
}

.tool-card {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.tool-card .tool-head { margin: 0 0 4px; font-size: 18px; }

.tool-card .tool-text {
  margin: 0;
  font-size: 14px;
  color: var(--muc-nhat);
}

.badge-vang {
  display: inline-block;
  background: var(--vang);
  color: var(--muc);
  border-radius: 999px;
  font-size: 11px;
  font-weight: 800;
  padding: 3px 10px;
  margin-left: 8px;
  vertical-align: middle;
}

/* ---------- フッター ---------- */
.site-footer {
  border-top: 1px solid var(--line);
  margin-top: 40px;
  padding: 28px 0 40px;
  font-size: 13px;
  color: var(--muc-nhat);
}

.footer-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.footer-nav { display: flex; gap: 16px; }

.footer-nav a:hover { color: var(--muc); text-decoration: underline; }

/* ---------- 準備中ページ ---------- */
.coming {
  text-align: center;
  padding: 80px 20px;
}

.coming h1 { font-size: 26px; margin: 0 0 10px; }

.coming p { color: var(--muc-nhat); margin: 0 0 26px; }

/* ---------- レスポンシブ ---------- */
@media (max-width: 760px) {
  .doors { grid-template-columns: 1fr; }
  .hero-top { padding: 40px 24px 48px; }
  .hero-bottom { padding: 22px 24px 26px; }
  .hero-actions .btn { flex: 1; }
  .global-nav { font-size: 13px; }
  .global-nav a { padding: 8px 8px; }
  .hero-star { font-size: 190px; right: -50px; top: -40px; }
}

/* ---------- モーション配慮 ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .card, .btn { transition: none; }
  .card:hover { transform: none; }
}

/* =========================================================
   v2追加：発音基礎コース（/pronunciation）
   ========================================================= */

/* ---------- 汎用 ---------- */
.audio-btn {
  border: 1px solid var(--line);
  background: #fff;
  border-radius: 999px;
  padding: 6px 12px;
  font-size: 14px;
  cursor: pointer;
  transition: transform .08s ease;
}
.audio-btn:active { transform: scale(0.92); }

.callout-rung, .callout-do {
  border-radius: 16px;
  padding: 18px 20px;
  font-size: 14.5px;
  margin: 22px 0;
}
.callout-rung { background: #E7F2ED; border-left: 5px solid var(--rung); }
.callout-do { background: var(--do-nhat); border-left: 5px solid var(--do); }

/* ---------- sticky進捗バー ---------- */
.ear-sticky {
  position: sticky;
  top: 49px; /* ヘッダーの下 */
  z-index: 40;
  background: var(--rung);
  color: #fff;
}
.ear-sticky-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 8px 20px;
}
.ear-sticky-label {
  font-family: "M PLUS Rounded 1c", sans-serif;
  font-weight: 800;
  font-size: 14px;
}
.ear-continue {
  border: 1px solid rgba(255,255,255,.5);
  background: rgba(255,255,255,.12);
  color: #fff;
  border-radius: 999px;
  padding: 5px 14px;
  font-size: 12.5px;
  font-weight: 700;
  cursor: pointer;
}
.ear-continue:hover { background: rgba(255,255,255,.22); }

/* ---------- ページ全体 ---------- */
.pron-page { padding: 34px 0 60px; max-width: 820px; }
.pron-hero h1 {
  font-size: clamp(26px, 4.5vw, 38px);
  margin: 10px 0 14px;
}
.pron-hero-sub {
  display: block;
  font-size: .55em;
  color: var(--rung);
  margin-top: 6px;
}
.pron-lead { font-size: 16px; color: var(--muc-nhat); }

.pron-section { margin: 48px 0; }
.pron-section h2 {
  font-size: clamp(20px, 3.4vw, 27px);
  border-bottom: 3px solid var(--rung);
  padding-bottom: 8px;
  margin: 0 0 18px;
}
.pron-swamps { margin: 20px 0; }
.pron-swamps h3 { margin: 0 0 8px; font-size: 17px; }
.pron-swamps p { margin: 0; font-size: 14px; color: var(--muc-nhat); }

/* ---------- 声調カード ---------- */
.tone-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin: 20px 0 14px;
}
.tone-card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 14px;
  text-align: center;
  position: relative;
}
.tone-card .audio-btn { position: absolute; top: 8px; right: 8px; }
.tone-card-word { display: block; font-size: 30px; line-height: 1.2; }
.tone-card-name { display: block; font-weight: 800; color: var(--rung); font-size: 13px; margin-top: 2px; }
.tone-card-jp { display: block; font-size: 13px; margin-top: 4px; }
.tone-card-hint { display: block; font-size: 11.5px; color: var(--muc-nhat); margin-top: 2px; }

/* ---------- 一覧テーブル ---------- */
.table-wrap { overflow-x: auto; margin: 18px 0; }
.pron-table {
  width: 100%;
  border-collapse: collapse;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 14px;
  overflow: hidden;
  font-size: 14px;
}
.pron-table th {
  background: #F6EFE9;
  text-align: left;
  padding: 10px 12px;
  font-size: 12.5px;
}
.pron-table td { padding: 10px 12px; border-top: 1px solid var(--line); vertical-align: middle; }
.pron-table .pron-letter { font-size: 19px; white-space: nowrap; }
.pron-table .pron-note { display: block; font-size: 12px; color: var(--muc-nhat); }
.pron-table tr.is-muted { opacity: .48; }
.sort-badge {
  display: inline-block;
  border-radius: 999px;
  padding: 3px 10px;
  font-size: 11.5px;
  font-weight: 800;
  white-space: nowrap;
}
.sort-g { background: #EDF3EE; color: #4A6B52; }
.sort-y { background: #FFF6D6; color: #8A6D00; }
.sort-r { background: var(--do-nhat); color: var(--do); }

/* ---------- 個別解説カード ---------- */
.pron-focus-head { margin: 26px 0 12px; font-size: 18px; }
.pron-focus-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 12px;
  margin-bottom: 20px;
}
.pron-focus { padding: 16px; }
.pron-focus p { margin: 6px 0 0; font-size: 13.5px; }
.pron-focus-letter { font-size: 26px; color: var(--do); }
.pron-focus-ex { color: var(--muc-nhat); }

/* ---------- クイズユニット ---------- */
.ear-unit {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 20px;
  padding: 22px;
  margin: 20px 0;
}
.ear-unit h3 { margin: 0 0 6px; font-size: 17px; }
.ear-unit-desc { margin: 0 0 14px; font-size: 13.5px; color: var(--muc-nhat); }
.ear-unit-chip { display: inline-block; min-width: 1.4em; }
.ear-unit-chip.is-none { color: var(--muc-nhat); }

.ear-box { display: none; margin-top: 16px; border-top: 1px dashed var(--line); padding-top: 16px; }
.ear-box.is-open { display: block; }

.ear-progress { font-size: 12.5px; font-weight: 800; color: var(--muc-nhat); margin-bottom: 10px; }
.ear-play { margin-bottom: 14px; padding: 10px 18px; font-size: 14px; }

.ear-choices { display: grid; grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: 10px; }
.ear-choice {
  border: 2px solid var(--line);
  background: #fff;
  border-radius: 14px;
  padding: 13px 10px;
  font-size: 15px;
  font-weight: 700;
  font-family: "M PLUS Rounded 1c", "Be Vietnam Pro", sans-serif;
  cursor: pointer;
  transition: transform .08s ease, border-color .1s ease;
}
.ear-choice:hover:not(:disabled) { border-color: var(--rung); }
.ear-choice:active { transform: translateY(2px); }
.ear-choice.is-correct { border-color: var(--rung); background: #E7F2ED; }
.ear-choice.is-wrong { border-color: var(--do); background: var(--do-nhat); }

.ear-feedback { margin-top: 14px; font-weight: 700; }
.ear-reveal { display: block; font-weight: 400; font-size: 14px; margin: 6px 0 12px; color: var(--muc-nhat); }
.ear-next { padding: 11px 22px; font-size: 15px; }

.ear-result-head { font-size: 18px; font-weight: 800; margin: 0 0 10px; }
.ear-missed-label { font-size: 13px; color: var(--muc-nhat); margin: 0 0 4px; }
.ear-missed { margin: 0 0 14px; padding-left: 20px; font-size: 13.5px; }
.ear-missed li { margin: 3px 0; }

/* ---------- 折りたたみ ---------- */
.pron-details {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 16px;
}
.pron-details summary {
  cursor: pointer;
  padding: 16px 20px;
  font-weight: 800;
  font-family: "M PLUS Rounded 1c", sans-serif;
}
.pron-details-body { padding: 0 20px 18px; font-size: 14.5px; }

/* ---------- 卒業セクション ---------- */
.grad {
  border-radius: 24px;
  padding: 36px 28px;
  text-align: center;
  border: 2px dashed var(--line);
  background: #fff;
}
.grad-badge { font-size: 46px; display: block; margin-bottom: 8px; filter: grayscale(1); opacity: .45; }
.grad h2 { margin: 0 0 10px; }
.grad p { font-size: 14.5px; }
.grad .grad-open-msg { display: none; }
.grad.is-unlocked {
  border: 2px solid var(--vang);
  background: #FFFBEB;
  box-shadow: 0 10px 30px rgba(255, 205, 0, .18);
}
.grad.is-unlocked .grad-badge { filter: none; opacity: 1; }
.grad.is-unlocked .grad-locked-msg { display: none; }
.grad.is-unlocked .grad-open-msg { display: block; }

@media (max-width: 640px) {
  .tone-cards { grid-template-columns: repeat(2, 1fr); }
  .ear-sticky { top: 0; }
}

/* =========================================================
   読み上げツール（/tools/reader）
   ========================================================= */
.reader-page { padding: 34px 20px 60px; max-width: 720px; }
.reader-hero h1 { font-size: clamp(24px, 4.5vw, 34px); margin: 10px 0 12px; }
.reader-card { margin: 22px 0 14px; }
.reader-label { display: block; font-weight: 800; font-size: 13.5px; margin-bottom: 8px; }
.reader-textarea {
  width: 100%;
  border: 2px solid var(--line);
  border-radius: 14px;
  padding: 14px;
  font-family: "Be Vietnam Pro", "Noto Sans JP", sans-serif;
  font-size: 16px;
  line-height: 1.7;
  resize: vertical;
  box-sizing: border-box;
}
.reader-textarea:focus { outline: none; border-color: var(--rung); }
.reader-controls { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 14px; }
.reader-controls .btn { padding: 12px 20px; font-size: 15px; }
.reader-controls .btn:disabled { opacity: .45; cursor: default; }
.reader-rate-row {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 16px;
  font-size: 13.5px;
  font-weight: 700;
}
.reader-rate-row input[type="range"] { flex: 1; min-width: 140px; accent-color: var(--rung); }
.reader-rate-hint { color: var(--muc-nhat); font-weight: 400; font-size: 12px; }
.reader-status { margin: 12px 0 0; font-weight: 800; font-size: 13.5px; color: var(--rung); min-height: 1.2em; }
.reader-novoice { margin: 10px 0 0; font-size: 13px; color: var(--do); }
.reader-samples { margin: 18px 0 6px; }
.reader-samples-label { font-size: 13px; font-weight: 700; color: var(--muc-nhat); margin: 0 0 8px; }
.reader-sample-btn { padding: 9px 14px; font-size: 13.5px; margin: 0 8px 8px 0; }
.callout-rung a { color: var(--rung); font-weight: 800; text-decoration: underline; }