@font-face {
  font-family: 'Saira';
  src: url('../fonts/saira-var.woff2') format('woff2-variations'),
       url('../fonts/saira-var.woff2') format('woff2');
  font-weight: 200 800;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: 'Martian Mono';
  src: url('../fonts/martianmono-var.woff2') format('woff2-variations'),
       url('../fonts/martianmono-var.woff2') format('woff2');
  font-weight: 300 700;
  font-style: normal;
  font-display: swap;
}

/* ------------------------------------------------------------------ tokens */

:root {
  --font-display: 'Saira', 'Segoe UI', sans-serif;
  --font-mono: 'Martian Mono', ui-monospace, 'Consolas', monospace;

  --bg: #08090b;
  --bg-glow: #12171d;
  --panel: #0e1216;
  --panel-2: #141a20;
  --raise: #1b232b;
  --line: rgba(255, 255, 255, 0.07);
  --line-strong: rgba(255, 255, 255, 0.14);
  --text: #e9eef3;
  --text-2: #97a4b1;
  --text-3: #5e6b78;

  --amber: #f2b02e;
  --amber-soft: #7a5510;
  --level: #4fdd8b;
  --level-soft: #12452c;
  --alert: #ff6a4d;

  --glass-a: #0c1c20;
  --glass-b: #061012;
  --metal-a: #2b343d;
  --metal-b: #10151a;
  --metal-hi: #495562;

  --radius: 18px;
  --radius-sm: 11px;
  --sheet-radius: 26px;

  --shadow-lift: 0 24px 60px -22px rgba(0, 0, 0, 0.9);
  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);

  --safe-t: env(safe-area-inset-top, 0px);
  --safe-b: env(safe-area-inset-bottom, 0px);
  --safe-l: env(safe-area-inset-left, 0px);
  --safe-r: env(safe-area-inset-right, 0px);
}

[data-theme='light'] {
  --bg: #efece4;
  --bg-glow: #ffffff;
  --panel: #f7f5f0;
  --panel-2: #eceae3;
  --raise: #e2ded4;
  --line: rgba(20, 24, 28, 0.10);
  --line-strong: rgba(20, 24, 28, 0.22);
  --text: #15191d;
  --text-2: #59636d;
  --text-3: #8a949e;

  --amber: #c9821a;
  --amber-soft: #f0d29a;
  --level: #168f52;
  --level-soft: #bfe9d0;
  --alert: #cf3a1c;

  --glass-a: #dfe3e0;
  --glass-b: #c9d0cd;
  --metal-a: #ffffff;
  --metal-b: #cdc9c0;
  --metal-hi: #ffffff;

  --shadow-lift: 0 22px 50px -24px rgba(40, 36, 28, 0.55);
}

* { box-sizing: border-box; }

html, body {
  height: 100%;
  margin: 0;
  overflow: hidden;
  overscroll-behavior: none;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-display);
  font-size: 16px;
  line-height: 1.45;
  -webkit-font-smoothing: antialiased;
  -webkit-tap-highlight-color: transparent;
  touch-action: manipulation;
  user-select: none;
}

body::before {
  content: '';
  position: fixed;
  inset: -20%;
  background:
    radial-gradient(58% 42% at 50% 34%, var(--bg-glow) 0%, transparent 68%),
    radial-gradient(90% 60% at 50% 120%, rgba(79, 221, 139, 0.06) 0%, transparent 70%);
  pointer-events: none;
  z-index: 0;
}

.grain {
  position: fixed;
  inset: 0;
  z-index: 999;
  pointer-events: none;
  opacity: 0.4;
  mix-blend-mode: overlay;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='3'/%3E%3C/filter%3E%3Crect width='160' height='160' filter='url(%23n)' opacity='0.42'/%3E%3C/svg%3E");
}
[data-theme='light'] .grain { opacity: 0.22; mix-blend-mode: multiply; }

svg { width: 100%; height: 100%; }
.icon-btn svg, .act svg, .sheet-close svg {
  fill: none;
  stroke: currentColor;
  stroke-width: 1.6;
  stroke-linecap: round;
  stroke-linejoin: round;
}
.fillcur { fill: currentColor; stroke: none; }

/* ------------------------------------------------------------------- shell */

.app {
  position: relative;
  z-index: 1;
  height: 100dvh;
  max-width: 560px;
  margin: 0 auto;
  padding: calc(var(--safe-t) + 10px) calc(var(--safe-r) + 16px) calc(var(--safe-b) + 10px) calc(var(--safe-l) + 16px);
  display: grid;
  grid-template-rows: auto auto minmax(0, 1fr) auto auto;
  gap: 12px;
}

/* topbar */

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  animation: dropIn 0.7s var(--ease-out) both;
}

.brand { display: flex; align-items: center; gap: 10px; min-width: 0; }

.brand-mark { width: 30px; height: 30px; flex: none; }
.brand-mark .bm-ring { fill: none; stroke: var(--line-strong); stroke-width: 1.2; }
.brand-mark .bm-tol  { fill: none; stroke: var(--text-3); stroke-width: 1; stroke-dasharray: 2 3; }
.brand-mark .bm-tick { stroke: var(--text-3); stroke-width: 1.2; stroke-linecap: round; }
.brand-mark .bm-bubble {
  fill: var(--amber); opacity: 0.9;
  transform-origin: 12px 12px;
  animation: bmDrift 7s ease-in-out infinite;
}
@keyframes bmDrift {
  0%, 100% { transform: translate(0, 0); }
  35%      { transform: translate(-3.6px, 1.4px); }
  62%      { transform: translate(-2.6px, -2.2px); }
}

.brand-text { display: flex; flex-direction: column; line-height: 1; min-width: 0; }
.brand-name {
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: 13px;
  letter-spacing: 0.14em;
}
.brand-sub {
  font-family: var(--font-mono);
  font-size: 8.5px;
  font-weight: 400;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--text-3);
  margin-top: 5px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.topbar-actions { display: flex; gap: 6px; flex: none; }

.icon-btn {
  width: 38px; height: 38px;
  display: grid; place-items: center;
  padding: 9px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: linear-gradient(180deg, var(--panel-2), var(--panel));
  color: var(--text-2);
  cursor: pointer;
  transition: color 0.2s, border-color 0.2s, transform 0.12s var(--ease), background 0.2s;
}
.icon-btn:hover { color: var(--text); border-color: var(--line-strong); }
.icon-btn:active { transform: scale(0.93); }
.icon-btn.on { color: var(--amber); border-color: color-mix(in srgb, var(--amber) 45%, transparent); }

/* mode segmented control */

.modebar {
  position: relative;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  padding: 4px;
  border: 1px solid var(--line);
  border-radius: 13px;
  background: linear-gradient(180deg, var(--panel), var(--panel-2));
  animation: dropIn 0.7s 0.05s var(--ease-out) both;
}
.mode {
  position: relative;
  z-index: 1;
  padding: 8px 4px 7px;
  border: 0;
  background: none;
  color: var(--text-3);
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 500;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  cursor: pointer;
  transition: color 0.24s;
}
.mode[aria-pressed='true'] { color: var(--text); }
.mode-glider {
  position: absolute;
  z-index: 0;
  top: 4px; bottom: 4px; left: 4px;
  width: calc((100% - 8px) / 4);
  border-radius: 10px;
  background: linear-gradient(180deg, var(--raise), var(--panel-2));
  border: 1px solid var(--line-strong);
  box-shadow: 0 4px 14px -6px rgba(0, 0, 0, 0.8);
  transform: translateX(calc(var(--mode-i, 0) * 100%));
  transition: transform 0.42s var(--ease-out);
}

/* stage */

.stage {
  position: relative;
  display: grid;
  place-items: center;
  min-height: 0;
  animation: riseIn 0.9s 0.12s var(--ease-out) both;
}

.vial {
  display: block;
  position: relative;
  z-index: 1;          /* the camera feed is positioned, so the canvas must
                          be too, or the video paints straight over it */
  width: 100%;
  height: 100%;
  touch-action: none;
}

/* camera mode */

.camfeed, .camfreeze {
  position: absolute;
  z-index: 0;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: var(--radius);
  background: #000;
  animation: fade 0.4s var(--ease) both;
}
.camfeed[hidden], .camfreeze[hidden] { display: none; }

.stage.cam .vial { border-radius: var(--radius); }
.stage.cam .statuspill { bottom: 10px; }

.gauge-clear {
  position: absolute;
  top: 10px; right: 10px;
  width: 34px; height: 34px;
  display: grid; place-items: center;
  padding: 8px;
  border: 1px solid var(--line-strong);
  border-radius: 50%;
  background: color-mix(in srgb, var(--panel) 78%, transparent);
  backdrop-filter: blur(8px);
  color: var(--text);
  cursor: pointer;
  animation: fade 0.25s var(--ease) both;
}
.gauge-clear[hidden] { display: none; }
.gauge-clear svg { fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linecap: round; }

.camhint {
  position: absolute;
  top: 12px;
  left: 50%;
  transform: translateX(-50%);
  padding: 8px 14px 7px;
  border-radius: 999px;
  background: color-mix(in srgb, var(--panel) 88%, transparent);
  backdrop-filter: blur(10px);
  border: 1px solid var(--line-strong);
  font-family: var(--font-mono);
  font-size: 9px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-2);
  white-space: nowrap;
  max-width: 92%;
  overflow: hidden;
  text-overflow: ellipsis;
  animation: hintIn 0.5s var(--ease-out) both;
  pointer-events: none;
}
.camhint[hidden] { display: none; }
.camhint.out { animation: hintOut 0.4s var(--ease) both; }
@keyframes hintIn { from { opacity: 0; transform: translate(-50%, -8px); } to { opacity: 1; transform: translate(-50%, 0); } }
@keyframes hintOut { to { opacity: 0; transform: translate(-50%, -8px); } }

.edgelights { position: absolute; inset: -2px; pointer-events: none; }
.edgelights i {
  position: absolute;
  --glow: var(--amber);
  opacity: 0;
  transition: opacity 0.18s linear;
  filter: blur(0.5px);
}
.edgelights i.lit { --glow: var(--level); }
.edgelights i[data-edge='top'],
.edgelights i[data-edge='bottom'] {
  left: 6%; right: 6%; height: 3px;
  background: linear-gradient(90deg, transparent, var(--glow) 22%, var(--glow) 78%, transparent);
}
.edgelights i[data-edge='left'],
.edgelights i[data-edge='right'] {
  top: 6%; bottom: 6%; width: 3px;
  background: linear-gradient(180deg, transparent, var(--glow) 22%, var(--glow) 78%, transparent);
}
.edgelights i[data-edge='top'] { top: 0; }
.edgelights i[data-edge='bottom'] { bottom: 0; }
.edgelights i[data-edge='left'] { left: 0; }
.edgelights i[data-edge='right'] { right: 0; }

.stage-flags {
  position: absolute;
  top: 2px; left: 2px;
  display: flex;
  gap: 6px;
}
.flag {
  font-family: var(--font-mono);
  font-size: 8.5px;
  font-weight: 600;
  letter-spacing: 0.18em;
  padding: 4px 7px 3px;
  border-radius: 6px;
  color: var(--bg);
  background: var(--amber);
}
.flag#flagRef { background: var(--text-2); }
.flag#flagCal { background: var(--level); }

.statuspill {
  position: absolute;
  bottom: 0;
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 7px 14px 6px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: color-mix(in srgb, var(--panel) 82%, transparent);
  backdrop-filter: blur(10px);
  font-family: var(--font-mono);
  font-size: 9.5px;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-2);
  white-space: nowrap;
  transition: color 0.25s, border-color 0.25s;
}
.statuspill .dot {
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--text-3);
  transition: background 0.25s, box-shadow 0.25s;
}
.statuspill.level {
  color: var(--level);
  border-color: color-mix(in srgb, var(--level) 40%, transparent);
}
.statuspill.level .dot {
  background: var(--level);
  box-shadow: 0 0 0 4px color-mix(in srgb, var(--level) 18%, transparent);
}

/* readout */

.readout {
  display: grid;
  gap: 10px;
  animation: riseIn 0.9s 0.2s var(--ease-out) both;
}

.ro-primary {
  display: grid;
  grid-template-columns: 1fr 1px 1fr;
  align-items: center;
  padding: 14px 8px 12px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background:
    linear-gradient(180deg, color-mix(in srgb, var(--panel-2) 90%, transparent), var(--panel));
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.04);
}
.ro-primary.single { grid-template-columns: 1fr; }
.ro-primary.single .ro-sep, .ro-primary.single #cellB { display: none; }

.ro-sep { align-self: stretch; background: var(--line); }

.ro-cell { display: grid; justify-items: center; gap: 3px; min-width: 0; }

.ro-axis {
  font-family: var(--font-mono);
  font-size: 8.5px;
  font-weight: 600;
  letter-spacing: 0.22em;
  color: var(--text-3);
  text-transform: uppercase;
}

.ro-val {
  display: flex;
  align-items: baseline;
  justify-content: center;
  gap: 2px;
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
  max-width: 100%;
}
.num {
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(32px, 10.5vw, 50px);
  line-height: 0.95;
  letter-spacing: -0.02em;
  font-variant-numeric: tabular-nums;
  transition: color 0.3s;
}
.unit {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 400;
  color: var(--text-2);
  letter-spacing: 0.04em;
}
.ro-cell.level .num { color: var(--level); }
.ro-cell.held .num { color: var(--amber); }

.ro-hint {
  font-family: var(--font-mono);
  font-size: 8.5px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--text-3);
  min-height: 12px;
}

body.bignum .num { font-size: clamp(40px, 13vw, 62px); }
body.bignum .ro-primary.single .num { font-size: clamp(56px, 19vw, 92px); }
body.bignum .ro-secondary { display: none; }

.ro-secondary {
  display: grid;
  grid-template-columns: 1fr 1fr 0.86fr;
  gap: 6px;
}
.ro-secondary.two { grid-template-columns: 1fr 1fr; }
.ro-secondary.two .chip:last-child { display: none; }
.chip {
  display: flex;
  align-items: baseline;
  justify-content: center;
  gap: 6px;
  padding: 7px 5px 6px;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: var(--panel);
  font-family: var(--font-mono);
  font-size: 8.5px;
  letter-spacing: 0.06em;
  white-space: nowrap;
  overflow: hidden;
}
.chip .k { color: var(--text-3); font-weight: 500; }
.chip .v { color: var(--text); font-weight: 600; font-variant-numeric: tabular-nums; }

/* actions */

.actionbar {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 8px;
  animation: riseIn 0.9s 0.28s var(--ease-out) both;
}
.act {
  display: grid;
  justify-items: center;
  gap: 5px;
  padding: 11px 4px 9px;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: linear-gradient(180deg, var(--panel-2), var(--panel));
  color: var(--text-2);
  cursor: pointer;
  transition: transform 0.12s var(--ease), color 0.2s, border-color 0.2s, background 0.2s;
}
.act svg { width: 21px; height: 21px; }
.act span {
  font-family: var(--font-mono);
  font-size: 8.5px;
  font-weight: 500;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}
.act:active { transform: scale(0.95); }
.act.on {
  color: var(--bg);
  background: linear-gradient(180deg, var(--amber), color-mix(in srgb, var(--amber) 78%, #000));
  border-color: var(--amber);
}
[data-theme='light'] .act.on { color: #fff; }
.act.flash { animation: flash 0.5s var(--ease-out); }
@keyframes flash {
  0% { box-shadow: 0 0 0 0 color-mix(in srgb, var(--level) 60%, transparent); }
  100% { box-shadow: 0 0 0 16px transparent; }
}

/* --------------------------------------------------------------- gate/modal */

.gate {
  position: fixed;
  inset: 0;
  z-index: 60;
  display: grid;
  place-items: center;
  padding: 24px;
  background: color-mix(in srgb, var(--bg) 92%, transparent);
  backdrop-filter: blur(14px);
}
.gate[hidden] { display: none; }
.gate-card {
  width: min(340px, 100%);
  display: grid;
  justify-items: center;
  gap: 12px;
  padding: 30px 24px 24px;
  border: 1px solid var(--line);
  border-radius: 24px;
  background: linear-gradient(180deg, var(--panel-2), var(--panel));
  box-shadow: var(--shadow-lift);
  text-align: center;
  animation: riseIn 0.6s var(--ease-out) both;
}
.gate-mark { width: 62px; height: 62px; }
.gate-card h1 {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 0.2em;
  text-transform: uppercase;
}
.gate-card p { margin: 0 0 6px; color: var(--text-2); font-size: 14px; }

.btn-primary {
  width: 100%;
  padding: 13px;
  border: 0;
  border-radius: 12px;
  background: linear-gradient(180deg, var(--level), color-mix(in srgb, var(--level) 74%, #000));
  color: #04140b;
  font-family: var(--font-mono);
  font-size: 10.5px;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  cursor: pointer;
  transition: transform 0.12s var(--ease), filter 0.2s;
}
[data-theme='light'] .btn-primary { color: #fff; }
.btn-primary:active { transform: scale(0.97); }
.btn-ghost {
  border: 0;
  background: none;
  color: var(--text-3);
  font-family: var(--font-mono);
  font-size: 9.5px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  cursor: pointer;
  padding: 4px;
}
.btn-ghost:hover { color: var(--text-2); }

/* ------------------------------------------------------------------ sheets */

.scrim {
  position: fixed;
  inset: 0;
  z-index: 40;
  background: rgba(0, 0, 0, 0.55);
  backdrop-filter: blur(3px);
  animation: fade 0.28s var(--ease) both;
}
.scrim[hidden] { display: none; }

.sheet {
  position: fixed;
  z-index: 50;
  left: 0; right: 0; bottom: 0;
  max-width: 560px;
  margin: 0 auto;
  max-height: min(86dvh, 760px);
  display: flex;
  flex-direction: column;
  border: 1px solid var(--line-strong);
  border-bottom: 0;
  border-radius: var(--sheet-radius) var(--sheet-radius) 0 0;
  background: linear-gradient(180deg, var(--panel-2), var(--panel) 40%);
  box-shadow: var(--shadow-lift);
  animation: sheetUp 0.42s var(--ease-out) both;
}
.sheet[hidden] { display: none; }
.sheet.closing { animation: sheetDown 0.26s var(--ease) both; }

.sheet-grip {
  width: 38px; height: 4px;
  margin: 9px auto 0;
  border-radius: 2px;
  background: var(--line-strong);
  flex: none;
}
.sheet-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 16px 12px 20px;
  flex: none;
}
.sheet-head h2 {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11.5px;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}
.sheet-body {
  padding: 0 20px calc(24px + var(--safe-b));
  overflow-y: auto;
  overscroll-behavior: contain;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
  scrollbar-color: var(--line-strong) transparent;
}
.sheet-body::-webkit-scrollbar { width: 6px; }
.sheet-body::-webkit-scrollbar-track { background: transparent; }
.sheet-body::-webkit-scrollbar-thumb {
  background: var(--line-strong);
  border-radius: 3px;
}

.field { padding: 14px 0; border-top: 1px solid var(--line); }
.field:first-child { border-top: 0; padding-top: 0; }
.field > label {
  display: block;
  margin-bottom: 9px;
  font-family: var(--font-mono);
  font-size: 9px;
  font-weight: 600;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--text-3);
}
.hint { margin: 9px 0 0; font-size: 12.5px; line-height: 1.5; color: var(--text-3); }

.seg {
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: 1fr;
  gap: 4px;
  padding: 4px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--bg);
}
.seg button {
  padding: 9px 2px 8px;
  border: 1px solid transparent;
  border-radius: 9px;
  background: none;
  color: var(--text-3);
  font-family: var(--font-mono);
  font-size: 9px;
  font-weight: 500;
  letter-spacing: 0.08em;
  cursor: pointer;
  transition: all 0.2s var(--ease);
  white-space: nowrap;
}
.seg button[aria-pressed='true'] {
  color: var(--text);
  background: linear-gradient(180deg, var(--raise), var(--panel-2));
  border-color: var(--line-strong);
}

.toggles { display: grid; gap: 2px; padding: 6px 0; border-top: 1px solid var(--line); }
.switch {
  display: grid;
  grid-template-columns: auto 1fr;
  align-items: center;
  gap: 14px;
  padding: 11px 0;
  cursor: pointer;
}
.switch input { position: absolute; opacity: 0; pointer-events: none; }
.switch .track {
  width: 42px; height: 25px;
  border-radius: 999px;
  background: var(--bg);
  border: 1px solid var(--line-strong);
  padding: 2px;
  transition: background 0.26s var(--ease), border-color 0.26s;
}
.switch .knob {
  display: block;
  width: 19px; height: 19px;
  border-radius: 50%;
  background: var(--text-3);
  transition: transform 0.3s var(--ease-out), background 0.26s;
}
.switch input:checked + .track { background: color-mix(in srgb, var(--level) 26%, transparent); border-color: var(--level); }
.switch input:checked + .track .knob { transform: translateX(17px); background: var(--level); }
.switch input:focus-visible + .track { outline: 2px solid var(--amber); outline-offset: 2px; }
.switch .lbl { font-size: 14px; display: grid; gap: 2px; }
.switch .lbl em { font-style: normal; font-size: 12px; color: var(--text-3); }

.btnrow { display: flex; gap: 8px; flex-wrap: wrap; }
.btn-line {
  flex: 1 1 auto;
  padding: 11px 12px;
  border: 1px solid var(--line-strong);
  border-radius: 11px;
  background: var(--panel-2);
  color: var(--text);
  font-family: var(--font-mono);
  font-size: 9.5px;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  cursor: pointer;
  transition: border-color 0.2s, color 0.2s, transform 0.12s var(--ease);
}
.btn-line:active { transform: scale(0.97); }
.btn-line.danger { color: var(--alert); border-color: color-mix(in srgb, var(--alert) 40%, transparent); }

.calrow { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; margin-bottom: 10px; }
.calcell {
  display: grid; gap: 4px;
  padding: 10px 12px;
  border: 1px solid var(--line);
  border-radius: 11px;
  background: var(--bg);
  font-family: var(--font-mono);
}
.calcell .k { font-size: 8.5px; letter-spacing: 0.18em; text-transform: uppercase; color: var(--text-3); }
.calcell .v { font-size: 11px; color: var(--text); font-variant-numeric: tabular-nums; }

/* history */

.hist { list-style: none; margin: 0; padding: 0; display: grid; gap: 8px; }
.hist li {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  gap: 10px;
  padding: 12px 14px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--panel-2);
  animation: riseIn 0.4s var(--ease-out) both;
}
.hist .h-main {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 600;
  font-variant-numeric: tabular-nums;
}
.hist .h-meta {
  font-family: var(--font-mono);
  font-size: 8.5px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-3);
  margin-top: 4px;
}
.hist .h-del {
  width: 30px; height: 30px;
  display: grid; place-items: center;
  padding: 7px;
  border: 0;
  border-radius: 9px;
  background: none;
  color: var(--text-3);
  cursor: pointer;
}
.hist .h-del:hover { color: var(--alert); }
.hist .h-del svg { fill: none; stroke: currentColor; stroke-width: 1.7; stroke-linecap: round; }
.empty { color: var(--text-3); font-size: 13.5px; line-height: 1.6; }
.empty strong { color: var(--text-2); }
#histTools { margin-top: 16px; }

/* prose */

.prose { font-size: 14px; line-height: 1.65; color: var(--text-2); }
.prose h3 {
  margin: 22px 0 6px;
  font-family: var(--font-mono);
  font-size: 9.5px;
  font-weight: 600;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--text);
}
.prose h3:first-child { margin-top: 0; }
.prose p { margin: 0 0 10px; }
.prose strong { color: var(--text); font-weight: 600; }

/* toast */

.toast {
  position: fixed;
  z-index: 70;
  left: 50%;
  top: calc(var(--safe-t) + 8px);
  transform: translateX(-50%);
  padding: 11px 18px 10px;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  background: var(--raise);
  color: var(--text);
  font-family: var(--font-mono);
  font-size: 9.5px;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  box-shadow: var(--shadow-lift);
  animation: toastIn 0.36s var(--ease-out) both;
  max-width: calc(100vw - 40px);
  text-align: center;
}
.toast[hidden] { display: none; }
.toast.out { animation: toastOut 0.3s var(--ease) both; }

/* ------------------------------------------------------------------ motion */

@keyframes dropIn { from { opacity: 0; transform: translateY(-10px); } to { opacity: 1; transform: none; } }
@keyframes riseIn { from { opacity: 0; transform: translateY(14px); } to { opacity: 1; transform: none; } }
@keyframes fade { from { opacity: 0; } to { opacity: 1; } }
@keyframes sheetUp { from { transform: translateY(100%); } to { transform: none; } }
@keyframes sheetDown { from { transform: none; } to { transform: translateY(100%); } }
@keyframes toastIn { from { opacity: 0; transform: translate(-50%, -14px); } to { opacity: 1; transform: translate(-50%, 0); } }
@keyframes toastOut { to { opacity: 0; transform: translate(-50%, -10px); } }

:focus-visible { outline: 2px solid var(--amber); outline-offset: 2px; border-radius: 6px; }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* short screens */
@media (max-height: 680px) {
  .app { gap: 9px; }
  .num { font-size: clamp(28px, 9vw, 40px); }
  body.bignum .num { font-size: clamp(34px, 11vw, 50px); }
  body.bignum .ro-primary.single .num { font-size: clamp(44px, 15vw, 70px); }
  .ro-primary { padding: 10px 8px 9px; }
  .act { padding: 9px 4px 8px; }
  .act svg { width: 19px; height: 19px; }
}

/* landscape phone: side-by-side */
@media (orientation: landscape) and (max-height: 560px) {
  .app {
    max-width: none;
    grid-template-columns: minmax(0, 1fr) minmax(220px, 268px);
    grid-template-rows: auto auto minmax(0, 1fr) auto;
    grid-template-areas:
      'top   top'
      'stage mode'
      'stage read'
      'stage act';
    column-gap: 18px;
  }
  .topbar    { grid-area: top; }
  .stage     { grid-area: stage; }
  .modebar   { grid-area: mode; }
  .readout   { grid-area: read; align-self: center; }
  .actionbar { grid-area: act; }
  .num { font-size: clamp(28px, 6vw, 40px); }
  body.bignum .num { font-size: clamp(36px, 8vw, 52px); }
  body.bignum .ro-secondary { display: grid; }
}