:root {
  --bg: #f6efe3;
  --surface: #fffaf2;
  --surface-2: #efe5d4;
  --ink: #1d1b1f;
  --ink-2: #6b6460;
  --line: #e2d6c2;
  --accent: #d99a2b;
  --accent-ink: #1d1b1f;
  --user-bubble: #1d1b1f;
  --user-ink: #fbf5ea;
  --danger: #c2453d;
  --code-bg: #f0e7d8;
  --shadow: 0 6px 24px rgba(60, 40, 10, .10);
  --safe-b: env(safe-area-inset-bottom, 0px);
  --safe-t: env(safe-area-inset-top, 0px);
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #141316;
    --surface: #1d1c20;
    --surface-2: #26242a;
    --ink: #f1ece4;
    --ink-2: #a19a92;
    --line: #322f36;
    --accent: #ecb240;
    --accent-ink: #141316;
    --user-bubble: #ecb240;
    --user-ink: #141316;
    --code-bg: #26242a;
    --shadow: 0 6px 24px rgba(0, 0, 0, .4);
  }
}

* { box-sizing: border-box; -webkit-tap-highlight-color: transparent; }
html, body { height: 100%; }
body {
  margin: 0; background: var(--bg); color: var(--ink);
  font: 16px/1.6 -apple-system, BlinkMacSystemFont, "PingFang TC", "Noto Sans TC", "Microsoft JhengHei", sans-serif;
  -webkit-font-smoothing: antialiased; overscroll-behavior: none;
}
[hidden] { display: none !important; }
button { font: inherit; color: inherit; }

/* ---------- 登入 ---------- */
.login {
  min-height: 100dvh; display: flex; flex-direction: column; align-items: center; justify-content: center;
  padding: 24px 24px calc(24px + var(--safe-b)); text-align: center;
}
.login-cat { width: 128px; height: 128px; border-radius: 30px; box-shadow: var(--shadow); }
.login h1 { margin: 20px 0 2px; font-size: 28px; letter-spacing: .04em; }
.login-sub { margin: 0 0 24px; color: var(--ink-2); }
.login form { width: 100%; max-width: 320px; display: grid; gap: 12px; }
.login input {
  font-size: 17px; padding: 14px 16px; border-radius: 14px; border: 1px solid var(--line);
  background: var(--surface); color: var(--ink); outline: none;
}
.login input:focus { border-color: var(--accent); }
.login button[type=submit] {
  padding: 14px; border: 0; border-radius: 14px; background: var(--ink); color: var(--bg); font-weight: 600; font-size: 17px;
}
.err { color: var(--danger); min-height: 1.4em; margin: 0; font-size: 14px; }

/* ---------- 主框架 ---------- */
.app { height: 100dvh; display: flex; flex-direction: column; }
.top {
  display: flex; align-items: center; justify-content: space-between;
  padding: calc(6px + var(--safe-t)) 8px 4px; background: var(--bg);
}
.title { display: flex; align-items: center; gap: 8px; font-weight: 700; font-size: 17px; letter-spacing: .03em; }
.title img { width: 28px; height: 28px; border-radius: 8px; }
.icon-btn {
  width: 44px; height: 44px; display: inline-grid; place-items: center; border: 0; background: transparent;
  border-radius: 12px; cursor: pointer; color: var(--ink);
}
.icon-btn:active { background: var(--surface-2); }

.modes { display: flex; align-items: center; gap: 6px; padding: 4px 14px 8px; width: 100%; max-width: 788px; margin: 0 auto; overflow-x: auto; scrollbar-width: none; }
.modes::-webkit-scrollbar { display: none; }
.mode {
  border: 1px solid var(--line); background: var(--surface); padding: 5px 14px; border-radius: 999px;
  font-size: 14px; color: var(--ink-2); cursor: pointer; white-space: nowrap;
}
.mode.active { background: var(--ink); color: var(--bg); border-color: var(--ink); }
.lang {
  margin-left: auto; font: inherit; font-size: 14px; padding: 5px 10px; border-radius: 999px;
  border: 1px solid var(--accent); background: var(--surface); color: var(--ink);
}

/* ---------- 對話 ---------- */
.chat { flex: 1; overflow-y: auto; -webkit-overflow-scrolling: touch; padding: 8px 14px 16px; }
#msgs { max-width: 760px; margin: 0 auto; display: flex; flex-direction: column; gap: 14px; }
.empty { height: 100%; display: flex; flex-direction: column; align-items: center; justify-content: center; text-align: center; color: var(--ink-2); padding-bottom: 40px; }
.empty img { width: 72px; height: 72px; border-radius: 18px; opacity: .95; }
.empty p { margin: 14px 0 18px; font-size: 17px; }
.chips { display: flex; flex-wrap: wrap; justify-content: center; gap: 8px; max-width: 420px; }
.chip {
  border: 1px solid var(--line); background: var(--surface); border-radius: 14px; padding: 8px 12px;
  font-size: 14px; color: var(--ink); cursor: pointer; text-align: left;
}

.msg { display: flex; flex-direction: column; }
.msg.user { align-items: flex-end; }
.msg.user .bubble {
  background: var(--user-bubble); color: var(--user-ink); padding: 9px 14px; border-radius: 18px 18px 6px 18px;
  max-width: 85%; white-space: pre-wrap; word-break: break-word;
}
.msg.assistant .bubble { max-width: 100%; word-break: break-word; }
.msg .files { display: flex; flex-wrap: wrap; gap: 6px; justify-content: flex-end; margin-bottom: 6px; max-width: 85%; }
.msg .files img { width: 96px; height: 96px; object-fit: cover; border-radius: 12px; border: 1px solid var(--line); }
.file-pill {
  display: inline-flex; align-items: center; gap: 6px; padding: 6px 10px; border-radius: 10px;
  background: var(--surface); border: 1px solid var(--line); font-size: 13px; max-width: 220px; color: var(--ink);
}
.file-pill span { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

.bubble p { margin: 0 0 .7em; }
.bubble p:last-child { margin-bottom: 0; }
.bubble h1, .bubble h2, .bubble h3 { font-size: 1.05em; margin: 1em 0 .4em; }
.bubble ul, .bubble ol { padding-left: 1.3em; margin: .3em 0 .7em; }
.bubble li { margin: .15em 0; }
.bubble code { background: var(--code-bg); padding: .1em .35em; border-radius: 5px; font-size: .9em; }
.bubble pre { background: var(--code-bg); padding: 12px; border-radius: 12px; overflow-x: auto; font-size: 13.5px; line-height: 1.5; }
.bubble pre code { background: none; padding: 0; }
.bubble table { border-collapse: collapse; display: block; overflow-x: auto; font-size: 14px; margin: .5em 0; }
.bubble th, .bubble td { border: 1px solid var(--line); padding: 5px 9px; }
.bubble blockquote { margin: .5em 0; padding-left: 12px; border-left: 3px solid var(--accent); color: var(--ink-2); }
.bubble a { color: var(--accent); }

.meta { display: flex; gap: 4px; margin-top: 4px; color: var(--ink-2); font-size: 12px; align-items: center; }
.meta button { border: 0; background: transparent; color: var(--ink-2); padding: 4px 6px; border-radius: 8px; font-size: 12px; cursor: pointer; }
.meta button:active { background: var(--surface-2); }
.error-box { color: var(--danger); background: color-mix(in srgb, var(--danger) 10%, transparent); padding: 10px 12px; border-radius: 12px; font-size: 14px; }

.typing { display: inline-flex; gap: 4px; padding: 6px 0; }
.typing i { width: 7px; height: 7px; border-radius: 50%; background: var(--ink-2); animation: blink 1.2s infinite; }
.typing i:nth-child(2) { animation-delay: .2s; } .typing i:nth-child(3) { animation-delay: .4s; }
@keyframes blink { 0%, 80%, 100% { opacity: .25; } 40% { opacity: 1; } }

/* ---------- 輸入列 ---------- */
.composer { padding: 6px 10px calc(8px + var(--safe-b)); background: var(--bg); }
.attachments { display: flex; gap: 8px; overflow-x: auto; padding: 4px 4px 8px; max-width: 760px; margin: 0 auto; }
.att { position: relative; flex: none; }
.att img { width: 64px; height: 64px; object-fit: cover; border-radius: 12px; border: 1px solid var(--line); display: block; }
.att .file-pill { height: 64px; }
.att .rm {
  position: absolute; top: -6px; right: -6px; width: 22px; height: 22px; border-radius: 50%; border: 0;
  background: var(--ink); color: var(--bg); font-size: 14px; line-height: 22px; padding: 0; cursor: pointer;
}
.bar {
  display: flex; align-items: flex-end; gap: 4px; max-width: 760px; margin: 0 auto;
  background: var(--surface); border: 1px solid var(--line); border-radius: 24px; padding: 4px; box-shadow: var(--shadow);
}
.attach { cursor: pointer; flex: none; color: var(--ink-2); }
.mic { flex: none; color: var(--ink-2); }
.mic.on { color: var(--danger); animation: pulse 1.2s infinite; }
@keyframes pulse { 50% { opacity: .45; } }
#input {
  flex: 1; border: 0; outline: none; resize: none; background: transparent; color: var(--ink);
  font: inherit; font-size: 16px; line-height: 1.45; padding: 10px 4px; max-height: 160px;
}
.send {
  flex: none; width: 40px; height: 40px; margin: 2px; border-radius: 50%; border: 0; display: grid; place-items: center;
  background: var(--accent); color: var(--accent-ink); cursor: pointer; transition: opacity .15s;
}
.send:disabled { opacity: .35; }
.send .i-stop { display: none; }
.send.stop { background: var(--ink); color: var(--bg); }
.send.stop .i-stop { display: block; }
.send.stop .i-send { display: none; }

/* ---------- 側邊欄 ---------- */
.scrim { position: fixed; inset: 0; background: rgba(0, 0, 0, .35); z-index: 10; }
.drawer {
  position: fixed; top: 0; bottom: 0; left: 0; width: min(84vw, 340px); background: var(--surface); z-index: 11;
  transform: translateX(-102%); transition: transform .22s ease; display: flex; flex-direction: column;
  padding-top: var(--safe-t); box-shadow: var(--shadow);
}
.drawer.open { transform: none; }
.drawer-head { display: flex; justify-content: space-between; align-items: center; padding: 8px 8px 8px 18px; }
.conv-list { list-style: none; margin: 0; padding: 0 8px; flex: 1; overflow-y: auto; }
.conv-list li { display: flex; align-items: center; border-radius: 12px; }
.conv-list li.active { background: var(--surface-2); }
.conv-list .open-conv {
  flex: 1; text-align: left; border: 0; background: transparent; padding: 10px 10px; cursor: pointer; min-width: 0;
}
.conv-list .open-conv b { display: block; font-weight: 500; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.conv-list .open-conv small { color: var(--ink-2); font-size: 12px; }
.conv-list .del { color: var(--ink-2); }
.conv-empty { color: var(--ink-2); padding: 12px 10px; font-size: 14px; }
.drawer-foot { border-top: 1px solid var(--line); padding: 14px 18px calc(14px + var(--safe-b)); display: grid; gap: 12px; }
.usage-row { display: flex; justify-content: space-between; font-size: 14px; }
.meter { height: 6px; border-radius: 3px; background: var(--surface-2); overflow: hidden; margin: 6px 0 4px; }
.meter div { height: 100%; width: 0; background: var(--accent); transition: width .3s; }
.usage-note { font-size: 12px; color: var(--ink-2); }
.text-btn { border: 1px solid var(--line); background: transparent; border-radius: 12px; padding: 10px; cursor: pointer; color: var(--ink-2); }

.toast {
  position: fixed; left: 50%; bottom: calc(96px + var(--safe-b)); transform: translateX(-50%);
  background: var(--ink); color: var(--bg); padding: 8px 14px; border-radius: 12px; font-size: 14px; z-index: 20;
}

.att.uploading img, .att.uploading .file-pill { opacity: .45; }
.att.uploading::after {
  content: ""; position: absolute; left: 50%; top: 50%; width: 20px; height: 20px; margin: -10px 0 0 -10px;
  border: 2.5px solid var(--ink-2); border-top-color: transparent; border-radius: 50%; animation: spin .8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

.usage-pill {
  border: 1px solid var(--line); background: var(--surface); color: var(--ink-2); border-radius: 999px;
  padding: 1px 9px; font-size: 12px; font-weight: 500; letter-spacing: 0; cursor: pointer; font-variant-numeric: tabular-nums;
}
.usage-pill.low { border-color: var(--danger); color: var(--danger); }

/* ---------- 通話 ---------- */
.top-actions { display: flex; }
.call {
  position: fixed; inset: 0; z-index: 15; background: var(--bg); display: flex; flex-direction: column;
  align-items: center; justify-content: center; gap: 14px; text-align: center;
  padding: calc(24px + var(--safe-t)) 24px calc(32px + var(--safe-b)); cursor: pointer;
}
.call-cat { width: 168px; height: 168px; border-radius: 40px; box-shadow: var(--shadow); transition: transform .2s; }
.call[data-state="listen"] .call-cat { animation: breathe 1.6s ease-in-out infinite; }
.call[data-state="think"] .call-cat { opacity: .75; }
.call[data-state="speak"] .call-cat { animation: talk .45s ease-in-out infinite alternate; }
.call[data-state="pause"] .call-cat { filter: grayscale(.6); }
@keyframes breathe { 50% { transform: scale(1.06); box-shadow: 0 0 0 16px color-mix(in srgb, var(--accent) 22%, transparent); } }
@keyframes talk { to { transform: scale(1.03) rotate(-1.5deg); } }
.call-state { margin: 8px 0 4px; font-size: 19px; font-weight: 700; }
.call-line { margin: 0; max-width: 560px; width: 100%; color: var(--ink-2); font-size: 15px; display: flex; gap: 8px; text-align: left;
  max-height: 7.5em; overflow: hidden; }
.call-line b { flex: none; color: var(--ink); font-weight: 600; }
.call-line.heiqi b { color: var(--accent); }
.call-end {
  margin-top: 18px; border: 0; background: var(--danger); color: #fff; font-weight: 700; font-size: 17px;
  padding: 14px 40px; border-radius: 999px; cursor: pointer;
}
.bubble .searching { color: var(--ink-2); font-size: 14px; margin: 4px 0 0; }
.heart {
  position: fixed; z-index: 25; pointer-events: none; color: #e0566b; font-size: 22px;
  transform: translate(-50%, -50%); animation: heartUp 1.1s ease-out forwards;
}
@keyframes heartUp { to { transform: translate(-50%, -160%) scale(1.4); opacity: 0; } }

/* ---------- 狀態列與過場 ---------- */
.msg.enter { animation: msgIn .15s ease-out; }
@keyframes msgIn { from { opacity: 0; transform: translateY(6px); } }
.status {
  display: flex; align-items: center; gap: 7px; font-size: 13px; color: var(--ink-2);
  max-height: 0; opacity: 0; overflow: hidden; transition: opacity .2s, max-height .2s, margin .2s;
}
.status.show { max-height: 22px; opacity: 1; margin-bottom: 4px; }
.status::before { content: ""; flex: none; width: 7px; height: 7px; border-radius: 50%; background: var(--accent); animation: blink 1.2s infinite; }
.call-state { transition: opacity .2s; }
@media (prefers-reduced-motion: reduce) {
  .msg.enter, .status::before, .typing i, .call-cat, .mic.on, .heart { animation: none !important; }
  .status { transition: none; }
}