:root {
  --bg: #FEF9ED;
  --surface: #FFFFFF;
  --surface-2: #F7F0E0;
  --ink: #2B2622;
  --ink-soft: #5D524B;
  --ink-faint: #8A7D73;
  --line: #E8DFCC;
  --accent: #B45309;
  --accent-soft: #FBE9D0;
  --accent-ink: #7C3A00;
  --danger: #B3261E;
  --danger-soft: #FDE8E7;
  --ok: #1E7A46;
  --mono: "DM Mono", ui-monospace, monospace;
  --serif: "Source Serif 4", Georgia, serif;
  --sans: "Inter", system-ui, -apple-system, sans-serif;
  --shadow: 0 1px 2px rgba(59,35,14,.06), 0 4px 12px rgba(59,35,14,.08);
  --radius: 14px;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #1F1F1F;
    --surface: #2A2A2A;
    --surface-2: #242424;
    --ink: #F5F0E8;
    --ink-soft: #C4BBAE;
    --ink-faint: #8F867A;
    --line: #3A3A3A;
    --accent: #F5B263;
    --accent-soft: #3A2C1C;
    --accent-ink: #F5B263;
    --danger: #FF8A80;
    --danger-soft: #3D2321;
    --ok: #7FDCA0;
    --shadow: 0 1px 2px rgba(0,0,0,.4), 0 6px 16px rgba(0,0,0,.35);
  }
}
* { box-sizing: border-box; margin: 0; padding: 0; }
html, body { height: 100%; }
body {
  font-family: var(--sans);
  background: var(--bg);
  color: var(--ink);
  font-size: 15px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}
button { font-family: inherit; cursor: pointer; }

/* ---------- Layout ---------- */
.app { display: flex; height: 100dvh; overflow: hidden; }

/* Sidebar */
.sidebar {
  width: 300px; min-width: 300px;
  background: var(--surface-2);
  border-right: 1px solid var(--line);
  display: flex; flex-direction: column;
  transition: transform .2s ease;
}
.side-head { padding: 18px 16px 12px; display: flex; align-items: center; gap: 10px; }
.side-head .logo {
  width: 30px; height: 30px; border-radius: 8px;
  background: var(--ink); color: var(--bg);
  display: grid; place-items: center;
  font-family: var(--serif); font-weight: 700; font-size: 15px;
}
.side-head h1 { font-family: var(--serif); font-size: 17px; font-weight: 700; letter-spacing: -.01em; }
.side-head .sub { font-family: var(--mono); font-size: 10px; color: var(--ink-faint); text-transform: uppercase; letter-spacing: .08em; }
.side-actions { padding: 0 12px 12px; display: flex; gap: 8px; }
.side-actions button { flex: 1; }
.chat-list { flex: 1; overflow-y: auto; padding: 4px 8px 12px; }
.chat-item {
  display: flex; align-items: center; gap: 8px;
  padding: 10px 10px 10px 12px; margin-bottom: 2px;
  border-radius: 10px; border: 1px solid transparent;
  background: transparent; width: 100%; text-align: left;
  color: var(--ink-soft); font-size: 13.5px;
}
.chat-item:hover { background: var(--surface); }
.chat-item.active { background: var(--surface); border-color: var(--line); color: var(--ink); box-shadow: var(--shadow); }
.chat-item .t { flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.chat-item .meta { font-family: var(--mono); font-size: 10px; color: var(--ink-faint); }
.chat-item .del {
  opacity: 0; border: none; background: none; color: var(--ink-faint);
  font-size: 15px; padding: 2px 6px; border-radius: 6px; line-height: 1;
}
.chat-item:hover .del, .chat-item.active .del { opacity: 1; }
.chat-item .del:hover { color: var(--danger); background: var(--danger-soft); }
.empty-list { padding: 28px 20px; text-align: center; color: var(--ink-faint); font-size: 13px; }
.side-foot { padding: 10px 16px 14px; border-top: 1px solid var(--line); font-family: var(--mono); font-size: 10.5px; color: var(--ink-faint); }

/* Main */
.main { flex: 1; display: flex; flex-direction: column; min-width: 0; }
.topbar {
  display: flex; align-items: center; gap: 12px;
  padding: 14px 22px; border-bottom: 1px solid var(--line);
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: blur(8px);
}
.burger { display: none; border: 1px solid var(--line); background: var(--surface); border-radius: 8px; padding: 6px 9px; font-size: 16px; color: var(--ink); }
.topbar .crumb { font-family: var(--mono); font-size: 11px; color: var(--ink-faint); text-transform: uppercase; letter-spacing: .1em; }
.topbar .chat-title { font-family: var(--serif); font-size: 18px; font-weight: 600; flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.topbar .spacer { flex: 1; }
.icon-btn {
  border: 1px solid var(--line); background: var(--surface); color: var(--ink-soft);
  border-radius: 9px; padding: 8px 12px; font-size: 13px; font-weight: 500;
  display: inline-flex; align-items: center; gap: 6px; transition: all .15s;
  white-space: nowrap;
}
.icon-btn:hover { border-color: var(--ink-faint); color: var(--ink); }
.icon-btn.danger:hover { border-color: var(--danger); color: var(--danger); background: var(--danger-soft); }
.icon-btn:disabled { opacity: .45; cursor: not-allowed; }

/* Content */
.content { flex: 1; overflow-y: auto; padding: 26px 22px 40px; }
.content-inner { max-width: 860px; margin: 0 auto; }

/* Hero */
.hero { text-align: center; padding: 26px 10px 8px; }
.hero .kicker { font-family: var(--mono); font-size: 11px; letter-spacing: .14em; text-transform: uppercase; color: var(--accent); font-weight: 500; }
.hero h2 { font-family: var(--serif); font-size: clamp(30px, 5vw, 44px); font-weight: 700; letter-spacing: -.02em; line-height: 1.1; margin: 10px 0 10px; }
.hero p { color: var(--ink-soft); max-width: 560px; margin: 0 auto; font-size: 15px; }
.hero .model-chip {
  display: inline-flex; align-items: center; gap: 7px;
  margin-top: 16px; padding: 7px 14px; border-radius: 999px;
  background: var(--accent-soft); color: var(--accent-ink);
  font-family: var(--mono); font-size: 12px;
  border: 1px solid color-mix(in srgb, var(--accent) 30%, transparent);
}
.hero .model-chip .dot { width: 7px; height: 7px; border-radius: 50%; background: var(--ok); box-shadow: 0 0 0 3px color-mix(in srgb, var(--ok) 25%, transparent); }

/* Input card */
.input-card {
  margin-top: 26px; background: var(--surface); border: 1px solid var(--line);
  border-radius: var(--radius); box-shadow: var(--shadow); overflow: hidden;
}
.input-card .drop {
  padding: 34px 24px; text-align: center; cursor: pointer;
  transition: background .15s;
}
.input-card .drop:hover, .input-card .drop.dragover { background: var(--accent-soft); }
.input-card .drop .big { font-size: 34px; }
.input-card .drop .lbl { font-weight: 600; margin-top: 8px; }
.input-card .drop .hint { font-family: var(--mono); font-size: 11.5px; color: var(--ink-faint); margin-top: 4px; }
.input-card .rec-row { display: flex; gap: 8px; padding: 10px 16px; border-top: 1px dashed var(--line); align-items: center; justify-content: center; flex-wrap: wrap; }
.rec-btn {
  display: inline-flex; align-items: center; gap: 8px;
  border: 1px solid var(--line); background: var(--bg); color: var(--ink);
  padding: 10px 18px; border-radius: 999px; font-weight: 600; font-size: 14px;
}
.rec-btn .dot { width: 10px; height: 10px; border-radius: 50%; background: var(--danger); }
.rec-btn.recording { background: var(--danger-soft); border-color: var(--danger); color: var(--danger); }
.rec-btn.recording .dot { animation: pulse 1.1s infinite; }
@keyframes pulse { 0%,100% { box-shadow: 0 0 0 0 rgba(179,38,30,.45);} 50% { box-shadow: 0 0 0 8px rgba(179,38,30,0);} }
.rec-timer { font-family: var(--mono); font-size: 13px; color: var(--danger); min-width: 90px; text-align: center; }
.rec-time { font-family: var(--mono); font-size: 12px; color: var(--ink-soft); min-width: 52px; text-align: center; }

/* Options */
.opts { display: flex; gap: 14px; padding: 12px 16px 14px; border-top: 1px solid var(--line); flex-wrap: wrap; align-items: center; }
.opt { display: flex; align-items: center; gap: 7px; font-size: 13px; color: var(--ink-soft); }
.opt input[type=checkbox] { width: 16px; height: 16px; accent-color: var(--accent); }
.opt select, .opt input[type=text] {
  font-family: inherit; font-size: 13px; color: var(--ink);
  background: var(--bg); border: 1px solid var(--line); border-radius: 8px; padding: 6px 10px;
}
.opt label { display: flex; align-items: center; gap: 7px; cursor: pointer; }
.transcribe-btn {
  margin-left: auto;
  background: var(--ink); color: var(--bg); border: none;
  padding: 11px 22px; border-radius: 10px; font-weight: 600; font-size: 14px;
  display: inline-flex; align-items: center; gap: 8px; transition: opacity .15s;
}
.transcribe-btn:hover { opacity: .88; }
.transcribe-btn:disabled { opacity: .45; cursor: not-allowed; }
.transcribe-btn .spin {
  width: 14px; height: 14px; border: 2px solid color-mix(in srgb, var(--bg) 40%, transparent);
  border-top-color: var(--bg); border-radius: 50%; animation: rot .8s linear infinite;
}
@keyframes rot { to { transform: rotate(360deg); } }

/* Status */
.status { display: none; margin-top: 14px; padding: 12px 16px; border-radius: 10px; font-size: 13.5px; }
.status.show { display: block; }
.status.err { background: var(--danger-soft); color: var(--danger); border: 1px solid color-mix(in srgb, var(--danger) 30%, transparent); }
.status.info { background: var(--accent-soft); color: var(--accent-ink); border: 1px solid color-mix(in srgb, var(--accent) 30%, transparent); }

/* Transcript */
.transcript { margin-top: 26px; display: none; }
.transcript.show { display: block; }
.t-head { display: flex; align-items: baseline; gap: 12px; flex-wrap: wrap; margin-bottom: 14px; }
.t-head h3 { font-family: var(--serif); font-size: 22px; font-weight: 700; }
.t-head .meta { font-family: var(--mono); font-size: 11.5px; color: var(--ink-faint); }
.t-actions { margin-left: auto; display: flex; gap: 8px; }
.t-body {
  background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius);
  box-shadow: var(--shadow); overflow: hidden;
}
.t-audio { padding: 14px 18px; border-bottom: 1px solid var(--line); background: var(--surface-2); }
.t-audio audio { width: 100%; height: 40px; }
.t-segments { padding: 6px 0; max-height: 60vh; overflow-y: auto; }
.seg {
  display: flex; gap: 14px; padding: 12px 18px;
  border-bottom: 1px solid color-mix(in srgb, var(--line) 55%, transparent);
}
.seg:last-child { border-bottom: none; }
.seg .time {
  font-family: var(--mono); font-size: 11px; color: var(--ink-faint);
  padding-top: 3px; min-width: 92px; user-select: none; cursor: pointer; flex-shrink: 0;
}
.seg .time:hover { color: var(--accent); text-decoration: underline; }
.seg .txt { flex: 1; font-size: 15px; line-height: 1.6; }
.seg .badge {
  display: inline-block; font-family: var(--mono); font-size: 10px; font-weight: 500;
  background: var(--accent-soft); color: var(--accent-ink);
  border-radius: 6px; padding: 1px 7px; margin-right: 8px; vertical-align: 2px;
  border: 1px solid color-mix(in srgb, var(--accent) 25%, transparent);
}
.seg .badge.spk-1 { background: var(--danger-soft); color: var(--danger); border-color: color-mix(in srgb, var(--danger) 25%, transparent); }
.seg .badge.spk-2 { background: color-mix(in srgb, var(--ok) 14%, transparent); color: var(--ok); border-color: color-mix(in srgb, var(--ok) 30%, transparent); }
.seg .badge.spk-3 { background: color-mix(in srgb, #2563EB 12%, transparent); color: #2563EB; border-color: color-mix(in srgb, #2563EB 30%, transparent); }

/* Modal */
.modal-backdrop[hidden] { display: none; }
.modal-backdrop {
  position: fixed; inset: 0; z-index: 100;
  background: rgba(20,15,8,.45); backdrop-filter: blur(3px);
  display: grid; place-items: center; padding: 20px;
}
.modal {
  background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius);
  box-shadow: 0 12px 40px rgba(0,0,0,.25); padding: 24px; max-width: 420px; width: 100%;
}
.modal h3 { font-family: var(--serif); font-size: 19px; margin-bottom: 8px; }
.modal p { color: var(--ink-soft); font-size: 14px; margin-bottom: 18px; }
.modal-actions { display: flex; justify-content: flex-end; gap: 8px; }
.modal-actions .danger {
  background: var(--danger); color: #fff; border-color: var(--danger);
}
.modal-actions .danger:hover { background: color-mix(in srgb, var(--danger) 88%, black); color: #fff; }

/* Mobile */
@media (max-width: 860px) {
  .sidebar {
    position: fixed; top: 0; bottom: 0; left: 0; z-index: 50;
    transform: translateX(-100%);
    box-shadow: 4px 0 24px rgba(0,0,0,.18);
  }
  .sidebar.open { transform: translateX(0); }
  .burger { display: inline-block; }
  .content { padding: 18px 14px 32px; }
  .topbar { padding: 12px 14px; }
  .icon-btn { padding: 8px 10px; }
  .topbar .icon-btn span { display: none; }
  .transcribe-btn { margin-left: 0; width: 100%; justify-content: center; }
  .opts { justify-content: center; }
  .seg { flex-direction: column; gap: 4px; }
  .seg .time { min-width: 0; }
  .t-actions { margin-left: 0; }
}