@import url('https://fonts.googleapis.com/css2?family=Source+Serif+4:opsz,wght@8..60,600;8..60,700&family=IBM+Plex+Sans:wght@400;500;600;700&family=IBM+Plex+Mono:wght@400;500;600&display=swap');

:root{
  --bg:#EDF0EA;
  --surface:#FFFFFF;
  --surface-alt:#EEF1EC;
  --ink:#1E2B26;
  --ink-soft:#55645D;
  --ink-faint:#8B978F;
  --border:#DFE4DC;
  --accent:#2F6B63;
  --accent-strong:#1F4F49;
  --accent-soft:#DCEAE6;
  --chart:#0E8A76;
  --left:#B15E4C;
  --left-soft:#F3E1DB;
  --right:#2E6FA8;
  --right-soft:#DEEAF2;
  --warn:#9A6A22;
  --warn-soft:#F3E7D2;
  --danger:#B33A3A;
  --danger-soft:#F5DFDD;
  --shadow: 0 1px 2px rgba(30,43,38,0.06), 0 10px 28px -14px rgba(30,43,38,0.20);
}
@media (prefers-color-scheme: dark){
  :root:not([data-theme="light"]){
    --bg:#0E1412;
    --surface:#171F1C;
    --surface-alt:#1D2622;
    --ink:#E9EEEA;
    --ink-soft:#9FB0A8;
    --ink-faint:#6C7A73;
    --border:#2B3630;
    --accent:#7FC2B4;
    --accent-strong:#A6DCCF;
    --accent-soft:#1E322C;
    --chart:#4FC3AC;
    --left:#E08B76;
    --left-soft:#33221C;
    --right:#8FBFE0;
    --right-soft:#1B2A36;
    --warn:#D9A54D;
    --warn-soft:#332510;
    --danger:#E08585;
    --danger-soft:#3A1F1E;
    --shadow: 0 1px 2px rgba(0,0,0,0.35), 0 10px 28px -14px rgba(0,0,0,0.6);
  }
}
:root[data-theme="dark"]{
  --bg:#0E1412; --surface:#171F1C; --surface-alt:#1D2622; --ink:#E9EEEA; --ink-soft:#9FB0A8; --ink-faint:#6C7A73;
  --border:#2B3630; --accent:#7FC2B4; --accent-strong:#A6DCCF; --accent-soft:#1E322C; --chart:#4FC3AC;
  --left:#E08B76; --left-soft:#33221C; --right:#8FBFE0; --right-soft:#1B2A36;
  --warn:#D9A54D; --warn-soft:#332510; --danger:#E08585; --danger-soft:#3A1F1E;
  --shadow: 0 1px 2px rgba(0,0,0,0.35), 0 10px 28px -14px rgba(0,0,0,0.6);
}

*{ box-sizing:border-box; -webkit-tap-highlight-color:transparent; }
html,body{ height:100%; }
body{
  margin:0; background:var(--bg); color:var(--ink);
  font-family:'IBM Plex Sans', -apple-system,'Segoe UI',sans-serif;
  font-size:15.5px; line-height:1.55; -webkit-font-smoothing:antialiased;
}
button, input, textarea, select{ font-family:inherit; color:inherit; }
.mono{ font-family:'IBM Plex Mono',ui-monospace,SFMono-Regular,monospace; }
.tab-num{ font-variant-numeric:tabular-nums; }
h1,h2,h3{ margin:0; text-wrap:balance; }

.stage{ min-height:100%; display:flex; justify-content:center; padding:0; }
@media (min-width:560px){ .stage{ padding:28px 16px; } }

.phone{
  width:100%; max-width:440px; min-height:100vh; background:var(--surface);
  display:flex; flex-direction:column; position:relative; overflow:hidden;
}
@media (min-width:560px){
  .phone{ min-height:auto; height:min(860px, calc(100vh - 56px)); border-radius:28px; box-shadow:var(--shadow); border:1px solid var(--border); }
}

header.app-head{
  padding:16px 20px 14px; border-bottom:1px solid var(--border);
  display:flex; align-items:center; justify-content:space-between; gap:10px; flex:0 0 auto;
}
.brand{ display:flex; align-items:baseline; gap:8px; }
.brand .name{ font-family:'Source Serif 4',serif; font-weight:700; font-size:1.18rem; }
.brand .ver{ font-size:10.5px; color:var(--ink-faint); font-family:'IBM Plex Mono',monospace; }
.today-pill{
  font-family:'IBM Plex Mono',monospace; font-size:12px; color:var(--ink-soft);
  background:var(--surface-alt); border:1px solid var(--border); border-radius:100px; padding:5px 10px;
  display:flex; align-items:center; gap:6px; white-space:nowrap;
}
.sync-dot{ width:6px; height:6px; border-radius:50%; background:var(--ink-faint); flex:0 0 auto; cursor:pointer; }
.sync-dot.on{ background:var(--chart); }
.sync-dot.local{ background:var(--warn); }
.sync-dot.connecting{ background:var(--warn); animation:pulse 1.2s ease-in-out infinite; }
@keyframes pulse{ 0%,100%{ opacity:1; } 50%{ opacity:.35; } }

main.app-main{ flex:1 1 auto; overflow-y:auto; padding:20px 20px 28px; -webkit-overflow-scrolling:touch; }
main.app-main::-webkit-scrollbar{ width:0; }

nav.tabbar{
  flex:0 0 auto; display:flex; border-top:1px solid var(--border); background:var(--surface);
  padding-bottom:env(safe-area-inset-bottom,0);
}
nav.tabbar button{
  flex:1; background:none; border:none; padding:11px 4px 10px; display:flex; flex-direction:column;
  align-items:center; gap:3px; cursor:pointer; color:var(--ink-faint); font-size:11.5px;
}
nav.tabbar button .ic{ width:20px; height:20px; }
nav.tabbar button.active{ color:var(--accent-strong); }
nav.tabbar button.active .ic{ color:var(--accent); }

/* ---- generic pieces ---- */
.section-title{ font-size:12px; text-transform:uppercase; letter-spacing:.07em; color:var(--ink-faint); font-weight:600; margin:0 0 10px; }
.card{ background:var(--surface); border:1px solid var(--border); border-radius:14px; padding:16px 18px; }
.stack{ display:flex; flex-direction:column; gap:12px; }
.row{ display:flex; align-items:center; gap:10px; }
.between{ justify-content:space-between; }

.btn{
  appearance:none; border:1px solid var(--border); background:var(--surface-alt); color:var(--ink);
  border-radius:12px; padding:13px 16px; font-size:14.5px; font-weight:600; cursor:pointer;
  display:flex; align-items:center; justify-content:center; gap:8px; width:100%;
}
.btn:active{ transform:scale(0.98); }
.btn.primary{ background:var(--accent); border-color:var(--accent); color:#fff; }
.btn.ghost{ background:transparent; border-color:var(--border); }
.btn.danger{ background:var(--danger-soft); border-color:var(--danger); color:var(--danger); }
.btn.sm{ padding:9px 12px; font-size:13px; width:auto; }
.btn[disabled]{ opacity:.45; pointer-events:none; }

.side-grid{ display:grid; grid-template-columns:1fr 1fr; gap:10px; }
.side-btn{
  border-radius:14px; padding:20px 10px; text-align:center; cursor:pointer; border:1.5px solid var(--border);
  background:var(--surface-alt); display:flex; flex-direction:column; align-items:center; gap:6px;
}
.side-btn .dot{ width:10px; height:10px; border-radius:50%; }
.side-btn .lbl{ font-weight:700; font-size:15px; }
.side-btn.left{ border-color:var(--left); }
.side-btn.left .dot{ background:var(--left); }
.side-btn.left .lbl{ color:var(--left); }
.side-btn.right{ border-color:var(--right); }
.side-btn.right .dot{ background:var(--right); }
.side-btn.right .lbl{ color:var(--right); }
.side-btn.both{ grid-column:1 / -1; border-color:var(--accent); }
.side-btn.both .dot{ background:var(--accent); }
.side-btn.both .lbl{ color:var(--accent-strong); }
.side-btn:active{ transform:scale(0.97); }

.side-chip{ display:inline-flex; align-items:center; gap:5px; font-size:11.5px; font-family:'IBM Plex Mono',monospace; padding:2px 8px 2px 6px; border-radius:100px; }
.side-chip .dot{ width:6px; height:6px; border-radius:50%; }
.side-chip.left{ background:var(--left-soft); color:var(--left); }
.side-chip.left .dot{ background:var(--left); }
.side-chip.right{ background:var(--right-soft); color:var(--right); }
.side-chip.right .dot{ background:var(--right); }
.side-chip.both{ background:var(--accent-soft); color:var(--accent-strong); }
.side-chip.both .dot{ background:var(--accent); }

/* ---- record: idle ---- */
.hero-stat{ text-align:center; padding:22px 10px 6px; }
.hero-stat .k{ font-size:12.5px; color:var(--ink-faint); margin-bottom:6px; }
.hero-stat .v{ font-family:'IBM Plex Mono',monospace; font-size:1.9rem; font-weight:600; color:var(--ink); }
.hero-stat .v small{ font-size:0.95rem; color:var(--ink-soft); font-weight:500; }

/* ---- record: active ---- */
.timer-wrap{ text-align:center; padding:18px 10px 10px; }
.timer{ font-family:'IBM Plex Mono',monospace; font-size:3rem; font-weight:600; letter-spacing:.01em; }
.timer.paused{ color:var(--warn); }
.timer-note{ font-size:12.5px; color:var(--ink-faint); margin-top:4px; }
.round-list{ display:flex; flex-direction:column; gap:6px; margin-top:14px; }
.round-row{ display:flex; align-items:center; justify-content:space-between; font-size:12.5px; color:var(--ink-soft); background:var(--surface-alt); border-radius:9px; padding:7px 10px; }
.ctrl-grid{ display:grid; grid-template-columns:1fr 1fr; gap:10px; margin-top:16px; }

.banner{ border-radius:12px; padding:12px 14px; font-size:13px; display:flex; gap:10px; align-items:flex-start; margin-bottom:14px; }
.banner.warn{ background:var(--warn-soft); color:var(--warn); }
.banner.info{ background:var(--accent-soft); color:var(--accent-strong); }
.banner .txt{ flex:1; }
.banner .x{ cursor:pointer; font-weight:700; opacity:.7; }
.banner-actions{ display:flex; gap:8px; margin-top:8px; }

/* ---- summary ---- */
.summary-grid{ display:grid; grid-template-columns:1fr 1fr; gap:10px; margin:14px 0; }
.stat-tile{ background:var(--surface-alt); border-radius:12px; padding:12px 14px; }
.stat-tile .k{ font-size:11.5px; color:var(--ink-faint); margin-bottom:3px; }
.stat-tile .v{ font-family:'IBM Plex Mono',monospace; font-size:1.15rem; font-weight:600; }

textarea.note-input, input.field, select.field{
  width:100%; border:1px solid var(--border); background:var(--surface); color:var(--ink);
  border-radius:10px; padding:10px 12px; font-size:14px; resize:vertical;
}
textarea.note-input{ min-height:64px; }
label.field-label{ font-size:12px; color:var(--ink-soft); font-weight:600; display:block; margin-bottom:6px; }

/* ---- history ---- */
.hist-day{ margin-bottom:18px; }
.hist-day .date-lbl{ font-size:12.5px; font-weight:600; color:var(--ink-soft); margin-bottom:8px; }
.hist-card{ border:1px solid var(--border); border-radius:12px; padding:13px 15px; margin-bottom:8px; cursor:pointer; }
.hist-top{ display:flex; justify-content:space-between; align-items:center; }
.hist-time{ font-family:'IBM Plex Mono',monospace; font-size:13px; color:var(--ink-soft); }
.hist-vol{ font-family:'IBM Plex Mono',monospace; font-weight:600; }
.hist-meta{ display:flex; gap:8px; margin-top:6px; align-items:center; flex-wrap:wrap; }
.hist-note{ font-size:12.5px; color:var(--ink-faint); margin-top:6px; }
.hist-detail{ margin-top:12px; padding-top:12px; border-top:1px dashed var(--border); display:flex; flex-direction:column; gap:8px; }
.rr-line{ display:flex; justify-content:space-between; font-size:12.5px; color:var(--ink-soft); }
.empty-note{ text-align:center; color:var(--ink-faint); font-size:13px; padding:30px 10px; }

/* ---- stats ---- */
.seg{ display:flex; background:var(--surface-alt); border-radius:11px; padding:3px; margin-bottom:18px; }
.seg button{ flex:1; border:none; background:none; padding:8px; border-radius:9px; font-size:13px; font-weight:600; color:var(--ink-soft); cursor:pointer; }
.seg button.active{ background:var(--surface); color:var(--accent-strong); box-shadow:var(--shadow); }
.stat-grid2{ display:grid; grid-template-columns:1fr 1fr; gap:10px; margin-bottom:18px; }

.ratio-bar{ display:flex; height:14px; border-radius:7px; overflow:hidden; background:var(--surface-alt); }
.ratio-bar .seg-l{ background:var(--left); }
.ratio-bar .seg-r{ background:var(--right); }
.ratio-legend{ display:flex; justify-content:space-between; font-size:12.5px; margin-top:8px; color:var(--ink-soft); }

.chart-wrap{ margin-top:6px; }
.chart-bars{ display:flex; align-items:flex-end; gap:6px; height:120px; padding-top:20px; }
.chart-col{ flex:1; display:flex; flex-direction:column; align-items:center; justify-content:flex-end; height:100%; position:relative; }
.chart-col .bar{ width:100%; max-width:26px; background:var(--chart); border-radius:5px 5px 3px 3px; min-height:2px; position:relative; }
.chart-col .val{ position:absolute; top:-18px; font-size:10px; font-family:'IBM Plex Mono',monospace; color:var(--ink-soft); opacity:0; white-space:nowrap; }
.chart-col.peak .bar{ background:var(--accent-strong); }
.chart-col.peak .val{ opacity:1; }
.chart-col:active .val{ opacity:1; }
.chart-col .lbl{ font-size:10px; color:var(--ink-faint); margin-top:6px; }

/* ---- modal / sheet ---- */
.overlay{ position:absolute; inset:0; background:rgba(10,14,12,0.42); display:flex; align-items:flex-end; z-index:40; }
@media (min-width:560px){ .overlay{ align-items:center; justify-content:center; } }
.sheet{ width:100%; background:var(--surface); border-radius:20px 20px 0 0; padding:20px 20px calc(20px + env(safe-area-inset-bottom,0)); max-height:88%; overflow-y:auto; }
@media (min-width:560px){ .sheet{ border-radius:18px; max-width:380px; padding:22px; } }
.sheet h3{ font-size:1.05rem; margin-bottom:14px; }
.sheet .close{ float:right; font-size:20px; color:var(--ink-faint); cursor:pointer; line-height:1; }
.mode-toggle{ display:flex; gap:8px; margin-bottom:14px; }
.mode-toggle button{ flex:1; padding:7px; border-radius:9px; border:1px solid var(--border); background:var(--surface-alt); font-size:12px; color:var(--ink-soft); cursor:pointer; }
.mode-toggle button.active{ background:var(--accent-soft); border-color:var(--accent); color:var(--accent-strong); font-weight:600; }
.vol-field{ margin-bottom:12px; }
.vol-field .side-chip{ margin-bottom:6px; }
.sheet-actions{ display:flex; gap:10px; margin-top:16px; }
.toast{
  position:absolute; left:50%; bottom:88px; transform:translateX(-50%); background:var(--ink); color:var(--bg);
  padding:9px 16px; border-radius:100px; font-size:12.5px; z-index:60; white-space:nowrap; box-shadow:var(--shadow);
}

.manual-round{ border:1px solid var(--border); border-radius:10px; padding:10px 12px; margin-bottom:8px; }
.manual-round-head{ display:flex; justify-content:space-between; align-items:center; margin-bottom:8px; }
.grid2{ display:grid; grid-template-columns:1fr 1fr; gap:8px; }
.link-btn{ background:none; border:none; color:var(--accent-strong); font-size:12.5px; font-weight:600; cursor:pointer; padding:4px 0; }

.icon-btn{ background:none; border:none; cursor:pointer; color:var(--ink-faint); padding:4px; display:flex; }

/* ---- auth / sync sheet ---- */
.sync-status-row{ font-size:12.5px; color:var(--ink-soft); display:flex; align-items:center; gap:8px; margin-bottom:14px; padding:10px 12px; background:var(--surface-alt); border-radius:10px; }
.auth-error{ font-size:12.5px; color:var(--danger); margin:-6px 0 10px; }
.auth-switch{ text-align:center; margin-top:14px; font-size:12.5px; color:var(--ink-soft); }
.auth-desc{ font-size:12.5px; color:var(--ink-soft); margin-bottom:14px; }