/* Shop Calc: dark, high contrast, glove-sized. Every tap target is at least 56px tall. */
:root {
  --bg: #000;
  --panel: #161616;
  --line: #5a5a5a;
  --text: #fff;
  --dim: #c8c8c8;
  --accent: #ffb300;
  --on-accent: #000;
  --green: #45e06a;
  --yellow: #ffd60a;
  --red: #ff6b5e;
  --tap: 56px;
  --tabbar: 68px;
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }

html, body {
  height: 100%;
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, Arial, sans-serif;
  font-size: 18px;
  line-height: 1.35;
  -webkit-text-size-adjust: 100%;
  -webkit-tap-highlight-color: transparent;
}

body {
  height: 100vh;
  height: 100dvh;
  display: flex;
  flex-direction: column;
  padding-top: env(safe-area-inset-top);
}

.top {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 12px;
  padding-left: max(12px, env(safe-area-inset-left));
  padding-right: max(12px, env(safe-area-inset-right));
  border-bottom: 2px solid var(--line);
}
.top h1 { font-size: 1.2rem; margin: 0; flex: 1 1 auto; white-space: nowrap; }

.badge {
  font-size: 0.8rem;
  font-weight: 700;
  padding: 6px 10px;
  border-radius: 999px;
  border: 2px solid currentColor;
  white-space: nowrap;
}
.badge.ok { color: var(--green); }
.badge.warn { color: var(--yellow); }

.installbtn {
  min-height: var(--tap);
  padding: 0 14px;
  font: inherit;
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--on-accent);
  background: var(--accent);
  border: 0;
  border-radius: 10px;
}

.help, .notice {
  margin: 0;
  padding: 12px;
  font-size: 1rem;
  border-bottom: 2px solid var(--line);
}
.help { background: var(--panel); color: var(--text); }
.notice { background: #3a0d09; color: #fff; border-color: var(--red); }

#app { flex: 1 1 auto; min-height: 0; display: flex; flex-direction: column; }

#screen {
  flex: 1 1 auto;
  min-height: 0;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
  padding: 12px;
  padding-left: max(12px, env(safe-area-inset-left));
  padding-right: max(12px, env(safe-area-inset-right));
  width: 100%;
  max-width: 640px;
  margin: 0 auto;
}

#tabs {
  flex: 0 0 auto;
  display: flex;
  border-top: 2px solid var(--line);
  background: var(--panel);
  padding-bottom: env(safe-area-inset-bottom);
}
.tab {
  flex: 1 1 0;
  min-height: var(--tabbar);
  padding: 4px 2px;
  font: inherit;
  font-size: 1rem;
  font-weight: 700;
  color: var(--dim);
  background: transparent;
  border: 0;
  border-top: 5px solid transparent;
}
.tab[aria-current="page"] { color: var(--accent); border-top-color: var(--accent); background: #000; }

h2 { font-size: 1.3rem; margin: 6px 0 12px; }
h3 { font-size: 1.1rem; margin: 22px 0 10px; color: var(--accent); }

.fld { display: block; margin: 0 0 14px; }
.lbl { display: block; font-size: 0.95rem; font-weight: 600; color: var(--dim); margin-bottom: 6px; }

input[type="text"], select, textarea {
  width: 100%;
  min-height: var(--tap);
  padding: 8px 14px;
  font: inherit;
  font-size: 1.35rem;
  color: var(--text);
  background: var(--panel);
  border: 2px solid var(--line);
  border-radius: 10px;
}
select { padding-right: 36px; }
input::placeholder { color: #8a8a8a; }
input:focus, select:focus, textarea:focus, button:focus-visible, a:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 2px;
}

.seg { display: flex; gap: 8px; flex-wrap: wrap; }
.segbtn {
  flex: 1 1 0;
  min-width: 56px;
  min-height: var(--tap);
  padding: 6px 8px;
  font: inherit;
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text);
  background: var(--panel);
  border: 2px solid var(--line);
  border-radius: 10px;
}
.segbtn[aria-pressed="true"] { color: var(--on-accent); background: var(--accent); border-color: var(--accent); }

.btn {
  display: block;
  width: 100%;
  min-height: var(--tap);
  margin: 12px 0;
  padding: 8px 14px;
  font: inherit;
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--on-accent);
  background: var(--accent);
  border: 2px solid var(--accent);
  border-radius: 10px;
}
.btn.ghost { color: var(--text); background: transparent; border-color: var(--line); }
.btn.danger { color: #000; background: var(--red); border-color: var(--red); }
.row2 { display: flex; gap: 10px; }
.row2 .btn { flex: 1 1 0; }

.result {
  margin: 18px 0;
  padding: 14px;
  background: var(--panel);
  border: 2px solid var(--accent);
  border-radius: 12px;
}
.big { display: flex; align-items: baseline; flex-wrap: wrap; gap: 10px; }
.big .num, .entry .num {
  font-size: clamp(3.2rem, 17vw, 6rem);
  font-weight: 800;
  line-height: 1.05;
  font-variant-numeric: tabular-nums;
  overflow-wrap: anywhere;
}
.big .num.small { font-size: clamp(2.4rem, 12vw, 4.2rem); }
.big .unit, .entry .unit { font-size: 1.6rem; font-weight: 700; color: var(--dim); }
.alt { font-size: 1.7rem; font-weight: 700; margin: 8px 0; }
.alt .sep { color: var(--line); padding: 0 4px; }

.entry {
  display: flex;
  align-items: baseline;
  justify-content: flex-end;
  gap: 10px;
  min-height: 84px;
  padding: 6px 14px;
  background: var(--panel);
  border: 2px solid var(--line);
  border-radius: 12px;
}

.fracrow { display: flex; align-items: baseline; gap: 12px; padding: 6px 0; border-bottom: 1px solid var(--line); }
.fracrow .den { flex: 0 0 3.2rem; font-size: 1.05rem; font-weight: 700; color: var(--dim); }
.fracrow .frac { flex: 1 1 auto; font-size: 2.3rem; font-weight: 800; font-variant-numeric: tabular-nums; }
.fracrow .errv { font-size: 1rem; color: var(--dim); font-variant-numeric: tabular-nums; white-space: nowrap; }

.keypad { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; margin: 14px 0; }
.key {
  min-height: 68px;
  font: inherit;
  font-size: 1.9rem;
  font-weight: 700;
  color: var(--text);
  background: var(--panel);
  border: 2px solid var(--line);
  border-radius: 12px;
}
.key:active, .segbtn:active, .btn:active, .tab:active { filter: brightness(1.4); }
.key.wide { grid-column: 1 / -1; font-size: 1.3rem; }

.used { margin: 12px 0 0; display: grid; grid-template-columns: 1fr auto; gap: 6px 12px; font-size: 1rem; }
.used dt { color: var(--dim); }
.used dd { margin: 0; text-align: right; font-weight: 700; font-variant-numeric: tabular-nums; overflow-wrap: anywhere; }

.hint { margin: 0; font-size: 1.15rem; color: var(--dim); }
.note { margin: 6px 0; font-size: 0.95rem; color: var(--dim); }
.info { margin: 0 0 14px; font-size: 1rem; color: var(--text); }
.warn { margin: 10px 0; padding: 10px 12px; font-size: 1rem; color: #000; background: var(--yellow); border-radius: 8px; font-weight: 600; }
.err { display: flex; flex-direction: column; gap: 4px; padding: 10px 12px; color: #000; background: var(--red); border-radius: 8px; font-size: 1.05rem; }
.disclaimer { margin: 10px 0; font-size: 1rem; font-weight: 700; color: var(--yellow); }

.flag-green .num, .flagline.flag-green { color: var(--green); }
.flag-yellow .num, .flagline.flag-yellow { color: var(--yellow); }
.flag-red .num, .flagline.flag-red { color: var(--red); }
.flagline { margin: 4px 0 8px; font-size: 1.3rem; font-weight: 800; }

.cutlist { width: 100%; border-collapse: collapse; font-size: 1rem; }
.cutlist th, .cutlist td { padding: 8px 6px; border-bottom: 1px solid var(--line); text-align: left; vertical-align: middle; }
.cutlist .numcell { text-align: right; font-weight: 700; font-variant-numeric: tabular-nums; white-space: nowrap; }
.cutlist .errcell { color: var(--red); font-weight: 600; }
.cutlist tfoot th, .cutlist tfoot td { border-top: 2px solid var(--accent); border-bottom: 0; font-size: 1.1rem; }
.rowbtn {
  min-width: var(--tap);
  min-height: var(--tap);
  font: inherit;
  font-size: 1.2rem;
  font-weight: 800;
  color: var(--text);
  background: transparent;
  border: 2px solid var(--line);
  border-radius: 10px;
}
.copybox { font-size: 1rem; font-family: ui-monospace, Menlo, Consolas, monospace; }

.foot { margin: 28px 0 12px; padding-top: 14px; border-top: 2px solid var(--line); }
.ref { margin: 0 0 10px; font-size: 0.9rem; color: var(--dim); }
.ver { margin: 10px 0 0; font-size: 0.85rem; color: var(--dim); }
.footlink {
  display: flex;
  align-items: center;
  min-height: var(--tap);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--accent);
  text-decoration: underline;
}

.toast {
  position: fixed;
  left: 50%;
  bottom: calc(var(--tabbar) + 20px + env(safe-area-inset-bottom));
  transform: translateX(-50%);
  padding: 12px 18px;
  font-weight: 700;
  color: #000;
  background: var(--green);
  border-radius: 10px;
  z-index: 10;
}

@media (max-width: 380px) {
  .installbtn { font-size: 0.85rem; padding: 0 10px; }
  .top h1 { font-size: 1.05rem; }
  .tab { font-size: 0.9rem; }
}