/*
  設計語彙：一張朦朧的照片當底，所有介面都是浮在上面、有厚度的霧面玻璃。
  玻璃＝半透明 + 背景模糊 + 上緣高光（厚度）+ 落下的陰影（浮空）+ 細微紙紋。
  文字一律深墨色，玻璃夠白、背景夠糊，所以永遠讀得清楚。
*/

:root {
  --bg-image: url("/backgrounds/canopy.jpg");
  --bg-blur: 10px;

  --ink: #1f1d1a;
  --ink-soft: #4f4841;
  --ink-faint: #7b7369;

  --glass: rgba(255, 255, 255, 0.5);
  --glass-strong: rgba(255, 255, 255, 0.72);
  --glass-quiet: rgba(255, 255, 255, 0.34);
  --glass-line: rgba(255, 255, 255, 0.58);
  --glass-line-soft: rgba(255, 255, 255, 0.34);
  /*
    頂條／底條：對話會從它們底下捲過去。backdrop-filter 在部分瀏覽器
    只糊得到背景、糊不掉上層元素，所以可讀性不能靠它 —— 底色本身要夠實，
    模糊只當加分。卡片和泡泡不會有東西從底下經過，就可以放心地透。
  */
  --glass-chrome: rgba(255, 255, 255, 0.6);
  --blur-chrome: saturate(1.7) blur(30px);
  --hairline: rgba(80, 92, 88, 0.16);

  /* 厚度：上緣一道高光、下緣一道暗邊 */
  --thickness: inset 0 1px 0 rgba(255, 255, 255, 0.9),
    inset 0 -1px 0 rgba(120, 130, 130, 0.14);
  --lift: 0 10px 30px rgba(28, 42, 50, 0.16), 0 2px 8px rgba(28, 42, 50, 0.1);
  --lift-lg: 0 24px 60px rgba(28, 42, 50, 0.26), 0 4px 14px rgba(28, 42, 50, 0.14);
  --blur: saturate(1.6) blur(20px);

  /*
    ── 專屬色 ──────────────────────────────────────────────
    整個介面只有一個顏色：綠。
    綠出現＝這裡要你注意（糾正、提示、進行中、主要按鈕）。
    其他一律是墨色與白玻璃。破壞性的動作刻意不給綠 —— 綠是「來」，不是「毀」。
  */
  --green: #1e7d51; /* 招牌綠：填色、主要按鈕、麥克風 */
  --green-ink: #1a5c3d; /* 綠色的字與圖示（放在淺玻璃上讀得清楚） */
  --green-deep: #123a28; /* 漸層的暗端 */
  --green-live: #2fa36a; /* 正在發生：聆聽、波形、呼吸 */
  --green-line: rgba(30, 125, 81, 0.34);
  --green-wash: rgba(30, 125, 81, 0.09);
  --green-paper: rgba(228, 243, 234, 0.6); /* 霧面綠紙：糾正卡 */
  --green-solid: linear-gradient(165deg, #24895a, var(--green-deep));

  --paper: rgba(255, 255, 255, 0.56); /* 中性霧面紙：說法卡 */

  --serif: "Iowan Old Style", "Palatino Linotype", Palatino, Georgia,
    "Times New Roman", serif;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang TC",
    "Noto Sans TC", "Microsoft JhengHei", sans-serif;

  --r-lg: 22px;
  --r-md: 16px;
  --r-sm: 11px;

  --topbar-h: 66px;
  --controls-h: 150px;

  /* 霧面紙的顆粒 */
  --grain: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='140' height='140'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='140' height='140' filter='url(%23n)' opacity='0.38'/%3E%3C/svg%3E");
}

* {
  box-sizing: border-box;
}

[hidden] {
  display: none !important;
}

html,
body {
  margin: 0;
  height: 100%;
}

body {
  background: #d7ded8; /* 照片載入前的底色，也是綠的 */
  color: var(--ink);
  font-family: var(--sans);
  -webkit-font-smoothing: antialiased;
  overscroll-behavior: none;
}

/* ---------- 背景：滿版照片 + 模糊 + 一層薄霧 ---------- */

.bg-photo,
.bg-scrim {
  position: fixed;
  inset: 0;
  pointer-events: none;
}

.bg-photo {
  z-index: -3;
  background-image: var(--bg-image);
  background-size: cover;
  background-position: center;
  filter: blur(var(--bg-blur)) brightness(1.05) saturate(1.06);
  /* 放大一點，模糊才不會在邊緣露出底色 */
  transform: scale(1.15);
}

/* 薄霧：只要壓一點點就好，還要看得出是樹 */
.bg-scrim {
  z-index: -2;
  background:
    radial-gradient(120% 90% at 50% 0%, rgba(255, 255, 255, 0.15), transparent 62%),
    linear-gradient(180deg, rgba(246, 249, 251, 0.09), rgba(238, 242, 245, 0.2));
}

/* 一層極淡的顆粒，讓整體不像塑膠 */
.bg-scrim::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image: var(--grain);
  opacity: 0.5;
  mix-blend-mode: soft-light;
}

/* ---------- 玻璃 ---------- */

.glass {
  background: var(--glass);
  -webkit-backdrop-filter: var(--blur);
  backdrop-filter: var(--blur);
  border: 1px solid var(--glass-line);
  box-shadow: var(--lift), var(--thickness);
}

/* 霧面紙的質地，疊在每一塊玻璃上 */
.glass::before,
.paper::before {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  background-image: var(--grain);
  opacity: 0.35;
  mix-blend-mode: soft-light;
  pointer-events: none;
}

.paper {
  position: relative;
  background: var(--glass);
  border: 1px solid var(--glass-line);
  box-shadow: var(--lift), var(--thickness);
}

svg {
  width: 100%;
  height: 100%;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.6;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.sprite {
  display: none;
}

/* ---------- 外框 ---------- */

.app {
  position: relative;
  height: 100dvh;
  max-width: 660px;
  margin: 0 auto;
}

/* ---------- 頂部（浮空玻璃條） ---------- */

.topbar {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  z-index: 5;
  margin: max(10px, env(safe-area-inset-top)) 12px 0;
  padding: 11px 14px 11px 12px;
  border-radius: var(--r-lg);
  display: flex;
  align-items: center;
  justify-content: space-between;

  background: var(--glass-chrome);
  -webkit-backdrop-filter: var(--blur-chrome);
  backdrop-filter: var(--blur-chrome);
  border: 1px solid var(--glass-line);
  box-shadow: var(--lift), var(--thickness);
}

.topbar::before {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  background-image: var(--grain);
  opacity: 0.32;
  mix-blend-mode: soft-light;
  pointer-events: none;
}

.who {
  display: flex;
  align-items: center;
  gap: 11px;
  position: relative;
}

.mark {
  width: 38px;
  height: 38px;
  border-radius: 13px;
  display: grid;
  place-items: center;
  font-family: var(--serif);
  font-size: 19px;
  color: #fff;
  background: var(--green-solid);
  box-shadow: var(--thickness), 0 3px 10px rgba(28, 42, 50, 0.24);
  transition: background 0.7s ease;
  flex: none;
}

/*
  情緒不換顏色，只換同一個綠的深淺 —— 開心亮、生氣沉、認真收斂。
  一個顏色也能有表情。
*/
.mark[data-emotion="playful"],
.mark[data-emotion="teasing"],
.mark[data-emotion="amused"],
.mark[data-emotion="excited"],
.mark[data-emotion="curious"] {
  background: var(--green-live);
}
.mark[data-emotion="flirty"],
.mark[data-emotion="tender"] {
  background: #4a9070;
}
.mark[data-emotion="serious"],
.mark[data-emotion="apologetic"] {
  background: #4a6357;
}
.mark[data-emotion="annoyed"],
.mark[data-emotion="hurt"] {
  background: #153c2a;
}

.mark.speaking {
  animation: breathe 2.2s ease-in-out infinite;
}

@keyframes breathe {
  0%,
  100% {
    box-shadow: var(--thickness), 0 3px 10px rgba(28, 42, 50, 0.24),
      0 0 0 0 rgba(47, 163, 106, 0.4);
  }
  50% {
    box-shadow: var(--thickness), 0 3px 10px rgba(28, 42, 50, 0.24),
      0 0 0 8px rgba(47, 163, 106, 0);
  }
}

.name {
  font-family: var(--serif);
  font-size: 19px;
  line-height: 1.15;
}

.status {
  font-size: 12px;
  color: var(--ink-soft);
  margin-top: 3px;
  letter-spacing: 0.3px;
}

.topbar-actions {
  display: flex;
  gap: 2px;
  position: relative;
}

.icon-btn {
  position: relative;
  background: none;
  border: 0;
  color: var(--ink-soft);
  width: 38px;
  height: 38px;
  padding: 9px;
  border-radius: var(--r-sm);
  cursor: pointer;
  transition: background 0.15s, color 0.15s;
}

.icon-btn:hover {
  background: rgba(255, 255, 255, 0.5);
  color: var(--ink);
}

/* ---------- 對話（在玻璃底下捲動） ---------- */

.stream {
  position: absolute;
  inset: 0;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
  padding: calc(var(--topbar-h) + 26px) 16px calc(var(--controls-h) + 24px);
  display: flex;
  flex-direction: column;
  gap: 20px;
  scroll-behavior: smooth;
  /*
    內容滑進玻璃條的範圍時就淡掉。這比把玻璃調實更好：底下根本沒有東西，
    自然不會有文字隱隱透出來，玻璃也就能維持通透。
  */
  -webkit-mask-image: linear-gradient(
    to bottom,
    transparent 0,
    transparent calc(var(--topbar-h) * 0.5),
    #000 calc(var(--topbar-h) + 24px),
    #000 calc(100% - var(--controls-h) - 20px),
    transparent calc(100% - var(--controls-h) * 0.5),
    transparent 100%
  );
  mask-image: linear-gradient(
    to bottom,
    transparent 0,
    transparent calc(var(--topbar-h) * 0.5),
    #000 calc(var(--topbar-h) + 24px),
    #000 calc(100% - var(--controls-h) - 20px),
    transparent calc(100% - var(--controls-h) * 0.5),
    transparent 100%
  );
}

.turn {
  display: flex;
  flex-direction: column;
  gap: 7px;
  animation: rise 0.42s cubic-bezier(0.2, 0.7, 0.3, 1) both;
}

@keyframes rise {
  from {
    opacity: 0;
    transform: translateY(8px);
  }
}

.turn.me {
  align-items: flex-end;
}

.bubble {
  position: relative;
  max-width: 86%;
  padding: 14px 17px;
  border-radius: var(--r-lg);
  border: 1px solid var(--glass-line);
  box-shadow: var(--lift), var(--thickness);
}

.bubble::before {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  background-image: var(--grain);
  opacity: 0.34;
  mix-blend-mode: soft-light;
  pointer-events: none;
}

.turn.lafe .bubble {
  background: var(--glass-strong);
  border-bottom-left-radius: 8px;
}

.turn.me .bubble {
  background: rgba(252, 246, 236, 0.52);
  border-color: rgba(255, 255, 255, 0.5);
  border-bottom-right-radius: 8px;
}

.en {
  position: relative;
  font-family: var(--serif);
  font-size: 18px;
  line-height: 1.52;
}

.turn.me .en {
  font-size: 17px;
}

.zh {
  position: relative;
  margin-top: 10px;
  padding-top: 10px;
  border-top: 1px solid var(--hairline);
  font-size: 14px;
  color: var(--ink-soft);
  line-height: 1.75;
}

.speak-btn {
  background: none;
  border: 0;
  color: var(--ink-soft);
  cursor: pointer;
  font: inherit;
  font-size: 12px;
  letter-spacing: 0.3px;
  padding: 4px 9px 4px 6px;
  border-radius: 999px;
  display: inline-flex;
  align-items: center;
  gap: 5px;
  align-self: flex-start;
  position: relative;
  transition: background 0.15s, color 0.15s;
}

.turn.me .speak-btn {
  align-self: flex-end;
}

.speak-btn svg {
  width: 15px;
  height: 15px;
  flex: none;
}

.speak-btn:hover {
  color: var(--green-ink);
  background: rgba(255, 255, 255, 0.55);
}

/* ---------- 教學卡片 ---------- */

.card {
  position: relative;
  max-width: 92%;
  align-self: flex-end;
  border-radius: var(--r-md);
  padding: 15px 17px;
  border: 1px solid var(--glass-line);
  box-shadow: var(--lift), var(--thickness);
  animation: rise 0.46s 0.08s cubic-bezier(0.2, 0.7, 0.3, 1) both;
}

.card::before {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  background-image: var(--grain);
  opacity: 0.34;
  mix-blend-mode: soft-light;
  pointer-events: none;
}

.card > * {
  position: relative;
}

.card-head {
  display: flex;
  align-items: center;
  gap: 9px;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 1.4px;
  margin-bottom: 11px;
}

.chip {
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.4px;
  padding: 2px 8px;
  border-radius: 999px;
  border: 1px solid currentColor;
  opacity: 0.7;
}

/* 糾正卡：唯一有綠底、有綠邊的卡片 —— 全畫面最醒目的東西 */
.card.correction {
  background: var(--green-paper);
  border-color: var(--green-line);
  box-shadow: var(--lift), var(--thickness), inset 3px 0 0 var(--green);
}

.card.correction .card-head {
  color: var(--green-ink);
}

.was {
  font-family: var(--serif);
  font-size: 15px;
  color: var(--ink-soft);
  text-decoration: line-through;
  text-decoration-color: rgba(90, 100, 94, 0.5);
  text-decoration-thickness: 1px;
}

.now {
  font-family: var(--serif);
  font-size: 18px;
  line-height: 1.45;
  margin: 6px 0 9px;
  color: var(--green-ink);
}

.why {
  font-size: 13.5px;
  color: var(--ink-soft);
  line-height: 1.75;
}

/* 說法卡：中性的紙，只有標題是綠 —— 比糾正低一階 */
.card.options {
  background: var(--paper);
}

.card.options .card-head {
  color: var(--green-ink);
}

.option {
  padding: 12px 0 4px;
  border-top: 1px solid var(--hairline);
}

.option:first-of-type {
  border-top: 0;
  padding-top: 0;
}

.option-en {
  font-family: var(--serif);
  font-size: 17px;
  line-height: 1.45;
}

.option-en .chip {
  font-family: var(--sans);
  color: var(--green-ink);
  margin-left: 8px;
  vertical-align: 2px;
  white-space: nowrap;
}

.option-note {
  color: var(--ink-soft);
  font-size: 13px;
  line-height: 1.7;
  margin-top: 5px;
}

.typing .en {
  color: var(--ink-soft);
  letter-spacing: 3px;
}

.system-note {
  align-self: center;
  text-align: center;
  color: var(--ink-soft);
  font-size: 13px;
  line-height: 1.8;
  max-width: 82%;
  padding: 12px 16px;
  border-radius: var(--r-md);
  background: var(--glass-quiet);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  border: 1px solid var(--glass-line-soft);
}

/* 要你注意的系統訊息（用量、額度）：綠字 + 綠邊，不用第二個顏色 */
.system-note.warn {
  color: var(--green-ink);
  border-color: var(--green-line);
  background: var(--green-wash);
}

/* ---------- 底部（浮空玻璃條） ---------- */

.controls {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 5;
  margin: 0 12px max(10px, env(safe-area-inset-bottom));
  padding: 13px 14px 15px;
  border-radius: var(--r-lg);

  background: var(--glass-chrome);
  -webkit-backdrop-filter: var(--blur-chrome);
  backdrop-filter: var(--blur-chrome);
  border: 1px solid var(--glass-line);
  box-shadow: var(--lift), var(--thickness);
}

.controls::before {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  background-image: var(--grain);
  opacity: 0.32;
  mix-blend-mode: soft-light;
  pointer-events: none;
}

.controls > * {
  position: relative;
}

.live-bar {
  display: flex;
  align-items: center;
  gap: 11px;
  padding: 9px 15px;
  margin-bottom: 12px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.55);
  border: 1px solid var(--glass-line);
  box-shadow: var(--thickness);
  color: var(--ink-soft);
  font-size: 14px;
  line-height: 1.4;
}

.wave {
  display: flex;
  align-items: center;
  gap: 2px;
  height: 14px;
  flex: none;
}

.wave i {
  width: 2px;
  height: 100%;
  background: var(--green-live);
  border-radius: 1px;
  animation: wave 1s ease-in-out infinite;
}

.wave i:nth-child(2) {
  animation-delay: 0.15s;
}
.wave i:nth-child(3) {
  animation-delay: 0.3s;
}
.wave i:nth-child(4) {
  animation-delay: 0.45s;
}

@keyframes wave {
  0%,
  100% {
    transform: scaleY(0.3);
  }
  50% {
    transform: scaleY(1);
  }
}

.mic-row {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 26px;
}

.mic {
  width: 68px;
  height: 68px;
  border-radius: 50%;
  border: 1px solid rgba(255, 255, 255, 0.35);
  cursor: pointer;
  position: relative;
  background: var(--green-solid);
  color: #fff;
  padding: 20px;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.35),
    inset 0 -2px 4px rgba(0, 0, 0, 0.2), 0 10px 22px rgba(28, 42, 50, 0.3),
    0 2px 6px rgba(28, 42, 50, 0.2);
  transition: transform 0.15s ease, filter 0.25s ease;
  -webkit-tap-highlight-color: transparent;
}

.mic svg {
  stroke-width: 1.5;
}

.mic:active {
  transform: scale(0.94);
}

.mic.listening {
  background: linear-gradient(165deg, #b45a45, #8d3d2c);
}

.mic.listening .mic-ring {
  position: absolute;
  inset: -6px;
  border-radius: 50%;
  border: 1.5px solid rgba(47, 163, 106, 0.6);
  animation: ring 1.6s ease-out infinite;
}

@keyframes ring {
  from {
    transform: scale(0.92);
    opacity: 1;
  }
  to {
    transform: scale(1.32);
    opacity: 0;
  }
}

.mic:disabled {
  background: rgba(255, 255, 255, 0.4);
  color: var(--ink-faint);
  cursor: not-allowed;
  box-shadow: var(--thickness);
}

.side-btn {
  background: rgba(255, 255, 255, 0.42);
  border: 1px solid var(--glass-line);
  box-shadow: var(--thickness), 0 3px 10px rgba(28, 42, 50, 0.1);
  color: var(--ink-soft);
  border-radius: var(--r-md);
  padding: 9px 13px;
  cursor: pointer;
  display: grid;
  justify-items: center;
  gap: 4px;
  min-width: 64px;
  font: inherit;
  transition: background 0.15s, color 0.15s, transform 0.12s;
  -webkit-tap-highlight-color: transparent;
}

.side-btn:hover {
  background: rgba(255, 255, 255, 0.62);
  color: var(--ink);
}

.side-btn:active {
  transform: scale(0.96);
}

.side-btn.listening {
  border-color: var(--green-line);
  color: var(--green-ink);
  background: var(--green-paper);
}

.glyph {
  font-family: var(--serif);
  font-size: 17px;
  line-height: 1;
}

.glyph-icon {
  width: 19px;
  height: 19px;
}

.side-label {
  font-size: 11px;
  letter-spacing: 0.5px;
}

.hint {
  text-align: center;
  color: var(--ink-soft);
  font-size: 12px;
  letter-spacing: 0.3px;
  margin-top: 12px;
  min-height: 16px;
}

.hint.warn {
  color: var(--green-ink);
  font-weight: 500;
}

.composer {
  display: flex;
  gap: 9px;
  margin-bottom: 13px;
  align-items: flex-end;
}

.composer textarea {
  flex: 1;
  resize: none;
  background: rgba(255, 255, 255, 0.62);
  border: 1px solid var(--glass-line);
  box-shadow: var(--thickness);
  border-radius: var(--r-md);
  color: var(--ink);
  padding: 12px 14px;
  font: inherit;
  font-size: 16px;
  line-height: 1.45;
  max-height: 140px;
}

.composer textarea:focus {
  outline: none;
  border-color: var(--green-line);
  background: rgba(255, 255, 255, 0.78);
}

.send-btn {
  background: var(--green-solid);
  color: #fff;
  border: 1px solid rgba(255, 255, 255, 0.3);
  border-radius: var(--r-md);
  width: 46px;
  height: 46px;
  padding: 12px;
  cursor: pointer;
  flex: none;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.3),
    0 6px 14px rgba(28, 42, 50, 0.22);
}

/* ---------- 面板 ---------- */

.sheet {
  position: fixed;
  inset: 0;
  background: rgba(30, 42, 48, 0.24);
  -webkit-backdrop-filter: blur(6px);
  backdrop-filter: blur(6px);
  z-index: 20;
  display: flex;
  align-items: flex-end;
  justify-content: center;
  animation: fade 0.2s ease;
}

@keyframes fade {
  from {
    opacity: 0;
  }
}

.sheet-inner {
  position: relative;
  background: rgba(255, 255, 255, 0.88);
  -webkit-backdrop-filter: saturate(1.5) blur(30px);
  backdrop-filter: saturate(1.5) blur(30px);
  border: 1px solid var(--glass-line);
  border-bottom: 0;
  box-shadow: var(--lift-lg), var(--thickness);
  border-radius: 26px 26px 0 0;
  width: 100%;
  max-width: 640px;
  max-height: 90dvh;
  overflow-y: auto;
  padding: 20px 22px calc(28px + env(safe-area-inset-bottom));
  animation: slide 0.28s cubic-bezier(0.2, 0.7, 0.3, 1);
}

@keyframes slide {
  from {
    transform: translateY(24px);
  }
}

.sheet-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 20px;
}

.sheet-head h2 {
  margin: 0;
  font-family: var(--serif);
  font-size: 21px;
  font-weight: 400;
}

.field {
  display: block;
  margin-bottom: 22px;
}

.field-label {
  display: block;
  font-size: 12px;
  color: var(--ink-soft);
  letter-spacing: 1.2px;
  margin-bottom: 9px;
}

.field-label b {
  color: var(--ink);
  font-variant-numeric: tabular-nums;
  font-weight: 500;
}

.field-note.warn-note {
  color: var(--green-ink);
}

.field-note {
  margin: 9px 0 0;
  font-size: 12.5px;
  color: var(--ink-faint);
  line-height: 1.7;
}

.field input[type="text"],
.field select,
.gate input {
  width: 100%;
  background: rgba(255, 255, 255, 0.6);
  border: 1px solid var(--glass-line);
  box-shadow: var(--thickness);
  border-radius: var(--r-md);
  color: var(--ink);
  padding: 12px 14px;
  font: inherit;
  font-size: 16px;
}

.field input[type="text"]:focus,
.field select:focus,
.gate input:focus {
  outline: none;
  border-color: var(--green-line);
  background: rgba(255, 255, 255, 0.8);
}

.field select {
  appearance: none;
  background-image: linear-gradient(45deg, transparent 50%, var(--ink-soft) 50%),
    linear-gradient(135deg, var(--ink-soft) 50%, transparent 50%);
  background-position: calc(100% - 19px) 21px, calc(100% - 14px) 21px;
  background-size: 5px 5px, 5px 5px;
  background-repeat: no-repeat;
}

.field input[type="range"] {
  width: 100%;
  accent-color: var(--green-ink);
}

.segmented {
  display: flex;
  background: rgba(255, 255, 255, 0.4);
  border: 1px solid var(--glass-line);
  box-shadow: var(--thickness);
  border-radius: var(--r-md);
  padding: 3px;
  gap: 3px;
}

.segmented button {
  flex: 1;
  background: none;
  border: 0;
  color: var(--ink-soft);
  padding: 9px;
  border-radius: 12px;
  cursor: pointer;
  font: inherit;
  font-size: 14px;
  transition: background 0.15s, color 0.15s;
}

.segmented button.on {
  background: rgba(255, 255, 255, 0.95);
  color: var(--green-ink);
  font-weight: 600;
  box-shadow: 0 2px 6px rgba(28, 42, 50, 0.14);
}

.switches {
  display: grid;
  gap: 14px;
  margin-bottom: 24px;
}

.switch {
  display: flex;
  align-items: center;
  gap: 11px;
  font-size: 14.5px;
  cursor: pointer;
}

.switch input {
  width: 19px;
  height: 19px;
  accent-color: var(--green-ink);
  flex: none;
}

.sheet-foot {
  display: flex;
  gap: 10px;
}

.ghost-btn,
.primary-btn {
  background: rgba(255, 255, 255, 0.55);
  border: 1px solid var(--glass-line);
  box-shadow: var(--thickness), 0 3px 10px rgba(28, 42, 50, 0.1);
  color: var(--ink);
  border-radius: var(--r-md);
  padding: 12px 14px;
  cursor: pointer;
  font: inherit;
  font-size: 14px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 7px;
  flex: 1;
  transition: background 0.15s, transform 0.12s;
}

.ghost-btn:hover {
  background: rgba(255, 255, 255, 0.75);
}

.ghost-btn:active,
.primary-btn:active {
  transform: scale(0.98);
}

/*
  破壞性動作（清空對話、全部忘掉）刻意不上綠。
  綠在這個介面裡代表「往前一步」，不該拿去標「刪掉」。
*/
.ghost-btn.danger {
  color: var(--ink-faint);
  background: rgba(255, 255, 255, 0.34);
}

.ghost-btn.danger:hover {
  color: var(--ink);
  background: rgba(255, 255, 255, 0.6);
}

.btn-icon {
  width: 16px;
  height: 16px;
  flex: none;
}

.primary-btn {
  background: var(--green-solid);
  color: #fff;
  border-color: rgba(255, 255, 255, 0.28);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.3),
    0 8px 18px rgba(28, 42, 50, 0.26);
}

.usage-line {
  margin: 18px 0 0;
  text-align: center;
  font-size: 11.5px;
  color: var(--ink-faint);
  letter-spacing: 0.4px;
  font-variant-numeric: tabular-nums;
}

/* ---------- 背景設定 ---------- */

.bg-row {
  display: flex;
  gap: 9px;
}

.bg-preview {
  width: 100%;
  height: 84px;
  border-radius: var(--r-md);
  background-image: var(--bg-image);
  background-size: cover;
  background-position: center;
  border: 1px solid var(--glass-line);
  box-shadow: var(--thickness), 0 3px 10px rgba(28, 42, 50, 0.12);
  margin-bottom: 10px;
}

/* ---------- 記憶清單 ---------- */

.memory-list {
  display: flex;
  flex-direction: column;
  gap: 7px;
  max-height: 230px;
  overflow-y: auto;
}

.memory-item {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 10px 12px;
  border-radius: var(--r-sm);
  background: rgba(255, 255, 255, 0.5);
  border: 1px solid var(--glass-line);
  box-shadow: var(--thickness);
  font-size: 13.5px;
  line-height: 1.6;
}

.memory-item span {
  flex: 1;
}

.memory-item button {
  flex: none;
  background: none;
  border: 0;
  color: var(--ink-faint);
  cursor: pointer;
  width: 22px;
  height: 22px;
  padding: 3px;
  border-radius: 6px;
}

.memory-item button:hover {
  color: var(--ink);
  background: rgba(120, 128, 124, 0.14);
}

.memory-empty {
  color: var(--ink-faint);
  font-size: 13px;
  line-height: 1.8;
  padding: 12px 0;
}

/* ---------- 通行碼 ---------- */

.gate {
  position: fixed;
  inset: 0;
  z-index: 40;
  display: grid;
  place-items: center;
  padding: 24px;
}

.gate-card {
  position: relative;
  width: 100%;
  max-width: 340px;
  text-align: center;
  padding: 34px 28px 30px;
  border-radius: 26px;
  background: rgba(255, 255, 255, 0.78);
  -webkit-backdrop-filter: saturate(1.6) blur(26px);
  backdrop-filter: saturate(1.6) blur(26px);
  border: 1px solid var(--glass-line);
  box-shadow: var(--lift-lg), var(--thickness);
}

.gate-card::before {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  background-image: var(--grain);
  opacity: 0.3;
  mix-blend-mode: soft-light;
  pointer-events: none;
}

.gate-card > * {
  position: relative;
}

.gate-mark {
  width: 54px;
  height: 54px;
  margin: 0 auto 20px;
  border-radius: 17px;
  background: var(--green-solid);
  color: #fff;
  display: grid;
  place-items: center;
  font-family: var(--serif);
  font-size: 26px;
  box-shadow: var(--thickness), 0 6px 16px rgba(28, 42, 50, 0.26);
}

.gate-card h1 {
  font-family: var(--serif);
  font-size: 27px;
  font-weight: 400;
  margin: 0 0 6px;
}

.gate-card p {
  color: var(--ink-soft);
  font-size: 13.5px;
  margin: 0 0 22px;
  letter-spacing: 0.4px;
}

.gate form {
  display: grid;
  gap: 10px;
}

.gate-error {
  color: var(--green-ink);
  margin-top: 14px !important;
}

/* ---------- 桌機：背景滿版，介面收成一整片浮空玻璃 ---------- */

@media (min-width: 780px) {
  .app {
    max-width: 820px;
    height: min(90dvh, 960px);
    margin: min(5dvh, 44px) auto;
    border-radius: 30px;
    overflow: hidden;

    /*
      這裡刻意「不」用 backdrop-filter：外框一旦有了它，裡面頂條／底條的
      backdrop-filter 會失效，捲動的文字就會直接透出來。外框只負責淡淡的
      底色和邊框，模糊交給裡面的玻璃條。
    */
    background: rgba(255, 255, 255, 0.26);
    border: 1px solid var(--glass-line);
    box-shadow: var(--lift-lg), var(--thickness);
  }

  .app::before {
    content: "";
    position: absolute;
    inset: 0;
    background-image: var(--grain);
    opacity: 0.3;
    mix-blend-mode: soft-light;
    pointer-events: none;
    z-index: 1;
  }

  /* 大玻璃裡面就不再套小玻璃，改用髮絲線分區 */
  .topbar,
  .controls {
    margin: 0;
    border: 0;
    border-radius: 0;
    background: var(--glass-chrome);
    box-shadow: none;
    padding-left: 22px;
    padding-right: 22px;
  }

  .topbar {
    border-bottom: 1px solid var(--glass-line-soft);
    padding-top: 14px;
    padding-bottom: 14px;
  }

  .controls {
    border-top: 1px solid var(--glass-line-soft);
    padding-bottom: 18px;
  }

  .stream {
    padding: calc(var(--topbar-h) + 30px) 26px calc(var(--controls-h) + 26px);
    gap: 24px;
  }

  .en {
    font-size: 19px;
  }

  .bubble {
    max-width: 76%;
  }

  .card {
    max-width: 82%;
  }

  /* 面板改成置中對話框 */
  .sheet {
    align-items: center;
  }

  .sheet-inner {
    max-width: 540px;
    border-radius: 24px;
    border-bottom: 1px solid var(--glass-line);
    max-height: 84dvh;
    animation: pop 0.24s cubic-bezier(0.2, 0.7, 0.3, 1);
  }

  @keyframes pop {
    from {
      transform: scale(0.97);
      opacity: 0;
    }
  }
}

@media (prefers-reduced-motion: reduce) {
  * {
    animation: none !important;
    transition: none !important;
  }
}