/* Scientific calculator (/tools/scientific-calculator/). Builds inside [data-webtool="scicalc"].
   Loads before tools-premium.css, so selectors carry two or three classes to win over .tool / .tp rules.
   Site tokens only; color-mix() tints sit after a plain fallback. */

.tool[data-webtool="scicalc"] { grid-template-columns: minmax(0, 1fr); }
.tool[data-webtool="scicalc"] > * { min-width: 0; }
.sc-calc [hidden], .sc-hist [hidden] { display: none !important; }

.sc-calc .sc-sr, .sc-hist .sc-sr {
  position: absolute; width: 1px; height: 1px; margin: -1px; padding: 0; border: 0;
  overflow: hidden; clip: rect(0 0 0 0); clip-path: inset(50%); white-space: nowrap;
}

.sc-calc { display: grid; gap: 12px; min-width: 0; }

/* ---------------- display ---------------- */
.sc-calc .sc-display {
  display: grid; gap: 2px; min-width: 0;
  padding: 10px 14px 12px;
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  transition: border-color 0.15s, box-shadow 0.15s;
}
.sc-calc .sc-display:focus-within {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 22%, transparent);
}
.sc-calc .sc-display.is-error { border-color: var(--bad); }
.sc-calc .sc-display.is-error:focus-within { box-shadow: 0 0 0 3px color-mix(in srgb, var(--bad) 20%, transparent); }

.sc-calc .sc-meta {
  display: flex; flex-wrap: wrap; align-items: center; gap: 6px 12px;
  font-size: 0.82rem; color: var(--text-2);
}
.sc-calc .sc-angle {
  display: inline-flex; flex: none; padding: 2px;
  background: var(--surface-raised);
  border: 1px solid var(--border);
  border-radius: var(--radius-pill);
}
.sc-calc .sc-seg {
  position: relative; display: inline-flex; gap: 0; margin: 0;
  font-size: inherit; color: inherit; cursor: pointer;
}
.sc-calc .sc-seg input {
  position: absolute; inset: 0; width: 100%; height: 100%; min-height: 0;
  margin: 0; padding: 0; border: 0; opacity: 0; cursor: pointer;
}
.sc-calc .sc-segtext {
  display: inline-flex; align-items: center; justify-content: center;
  min-width: 56px; min-height: 44px; padding: 0 14px;
  border-radius: var(--radius-pill);
  font-weight: 600; letter-spacing: 0.04em; color: var(--text-2);
  transition: background-color 0.15s, color 0.15s;
}
.sc-calc .sc-seg input:checked + .sc-segtext { background: var(--accent); color: var(--bg); }
.sc-calc .sc-seg input:focus-visible + .sc-segtext { outline: 2px solid var(--accent); outline-offset: 2px; }
.sc-calc .sc-seg input:focus-visible { outline: none; box-shadow: none; }

.sc-calc .sc-memflag {
  display: inline-flex; align-items: center; flex: none;
  padding: 3px 9px; border-radius: var(--radius-pill);
  font-weight: 700; color: var(--accent);
  background: var(--surface-raised);
  background: color-mix(in srgb, var(--accent) 12%, transparent);
}
.sc-calc .sc-ans {
  flex: 1 1 8rem; min-width: 0; text-align: right;
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
  color: var(--text-3); font-variant-numeric: tabular-nums;
}

.sc-calc .sc-exprwrap { display: block; gap: 0; margin: 0; font-size: inherit; color: inherit; }
.sc-calc .sc-expr {
  display: block; width: 100%; box-sizing: border-box; min-height: 44px; margin: 0; padding: 6px 0 2px;
  font: inherit; font-size: 1.25rem; line-height: 1.3; text-align: right;
  font-variant-numeric: tabular-nums; color: var(--text); caret-color: var(--accent);
  background: transparent; border: 0; border-radius: 0; box-shadow: none; outline: none;
}
.sc-calc .sc-expr::placeholder { color: var(--text-3); opacity: 1; }
.sc-calc .sc-expr:focus, .sc-calc .sc-expr:focus-visible { outline: none; box-shadow: none; }

.sc-calc .sc-result {
  min-height: 1.2em; margin: 0;
  font-size: 2.25rem; line-height: 1.2; font-weight: 600; letter-spacing: -0.02em;
  text-align: right; font-variant-numeric: tabular-nums; overflow-wrap: anywhere;
  color: var(--text);
}
.sc-calc .sc-result.is-preview { color: var(--text-3); font-weight: 500; }
.sc-calc .sc-result.is-mid { font-size: 1.75rem; }
.sc-calc .sc-result.is-long { font-size: 1.375rem; }
.sc-calc .sc-display.is-empty .sc-result::before { content: "0"; color: var(--text-3); font-weight: 500; }
.sc-calc .sc-result sup, .sc-calc .sc-ans sup, .sc-hist .sc-hist-res sup {
  position: relative; top: -0.75em; font-size: 0.55em; line-height: 0; vertical-align: baseline;
}

/* ---------------- status + actions ---------------- */
.sc-calc .sc-bar { display: flex; flex-wrap: wrap; align-items: center; gap: 8px 10px; min-width: 0; }
.sc-calc .sc-bar .wt-status { flex: 1 1 12rem; min-width: 0; font-size: 0.92rem; color: var(--text-2); }
.sc-calc .sc-display.is-error ~ .sc-bar .wt-status { color: var(--bad); }
.sc-calc .sc-bar .btn { flex: none; }
.sc-calc .sc-kb[aria-pressed="true"] { color: var(--accent); box-shadow: inset 0 0 0 1px var(--accent); }

/* ---------------- keypad: compact by default, .is-wide (set from the box width) shows everything ---------------- */
.sc-calc .sc-compact, .sc-calc .sc-grid {
  display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); gap: 6px; min-width: 0;
}
.sc-calc .sc-wide { display: none; }
.sc-calc.is-wide .sc-compact { display: none; }
.sc-calc.is-wide .sc-wide { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 16px; }
.sc-calc.is-wide .sc-grid { gap: 8px; }
.sc-calc .sc-span2 { grid-column: span 2; }

.sc-calc .sc-key {
  display: flex; align-items: center; justify-content: center; min-width: 0; min-height: 46px;
  margin: 0; padding: 0 4px; box-sizing: border-box;
  font: inherit; font-size: 1.02rem; line-height: 1; white-space: nowrap; overflow: hidden;
  color: var(--text);
  background: var(--bg-2);
  background: color-mix(in srgb, var(--text) 7%, var(--bg-2));
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  cursor: pointer; touch-action: manipulation; user-select: none; -webkit-user-select: none;
  -webkit-tap-highlight-color: transparent;
  transition: background-color 0.12s, transform 0.08s;
}
.sc-calc.is-wide .sc-key { min-height: 48px; }
.sc-calc .sc-key.is-num { background: var(--surface-raised); border-color: var(--border); font-size: 1.2rem; font-weight: 500; }
.sc-calc .sc-key.is-op {
  font-size: 1.25rem; color: var(--accent);
  background: var(--bg-2);
  background: color-mix(in srgb, var(--accent) 13%, var(--surface-raised));
}
.sc-calc .sc-key.is-eq { font-size: 1.3rem; font-weight: 600; color: var(--bg); background: var(--accent); }
.sc-calc .sc-key.is-clear {
  font-weight: 600; color: var(--bad);
  background: var(--bg-2);
  background: color-mix(in srgb, var(--bad) 11%, var(--surface-raised));
}
.sc-calc .sc-key.is-mem { font-size: 0.88rem; font-weight: 600; color: var(--text-2); background: transparent; border-color: var(--border); }
.sc-calc .sc-key.is-shift { font-size: 0.92rem; font-weight: 600; color: var(--accent); }
.sc-calc .sc-key.is-shift[aria-pressed="true"] { color: var(--bg); background: var(--accent); }
.sc-calc .sc-key.is-small { font-size: 0.84rem; }

@media (hover: hover) {
  .sc-calc .sc-key:hover { background-image: linear-gradient(color-mix(in srgb, var(--text) 7%, transparent), color-mix(in srgb, var(--text) 7%, transparent)); }
}
.sc-calc .sc-key:active, .sc-calc .sc-key.is-hit {
  background-image: linear-gradient(color-mix(in srgb, var(--text) 14%, transparent), color-mix(in srgb, var(--text) 14%, transparent));
  transform: scale(0.96);
}
.sc-calc .sc-key:focus-visible {
  outline: 2px solid var(--accent); outline-offset: 2px; box-shadow: none; border-radius: var(--radius-sm);
}

/* ---------------- history ---------------- */
.sc-hist { display: grid; gap: 8px; min-width: 0; }
.sc-hist .sc-hist-head { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 8px; }
.sc-hist .sc-hist-title { margin: 0; font-size: 1.0625rem; line-height: 1.35; font-weight: 600; letter-spacing: 0; }
.sc-hist .sc-hist-empty { margin: 0; font-size: 0.92rem; color: var(--text-3); }
.sc-hist .sc-hist-list {
  display: grid; gap: 2px; margin: 0; padding: 0; list-style: none;
  max-height: 22rem; overflow-y: auto; overscroll-behavior: contain;
}
.sc-hist .sc-hist-item {
  display: flex; align-items: stretch; gap: 4px; min-width: 0; margin: 0;
  border-bottom: 1px solid var(--border);
}
.sc-hist .sc-hist-item:last-child { border-bottom: 0; }
.sc-hist .sc-hist-expr, .sc-hist .sc-hist-res {
  min-height: 44px; margin: 0; padding: 6px 10px; box-sizing: border-box;
  font: inherit; font-size: 0.98rem; line-height: 1.35; font-variant-numeric: tabular-nums;
  overflow-wrap: anywhere; background: transparent; border: 0; border-radius: var(--radius-sm);
  cursor: pointer; -webkit-tap-highlight-color: transparent;
}
.sc-hist .sc-hist-expr { flex: 1 1 auto; min-width: 0; text-align: left; color: var(--text-2); }
.sc-hist .sc-hist-res { flex: 0 1 auto; max-width: 55%; text-align: right; font-weight: 600; color: var(--text); }
@media (hover: hover) {
  .sc-hist .sc-hist-expr:hover, .sc-hist .sc-hist-res:hover { background: var(--bg-2); color: var(--accent); }
}
.sc-hist .sc-hist-expr:focus-visible, .sc-hist .sc-hist-res:focus-visible {
  outline: 2px solid var(--accent); outline-offset: -2px; box-shadow: none;
}

/* ---------------- sizes ---------------- */
.sc-calc.is-wide .sc-expr { font-size: 1.375rem; }
.sc-calc.is-wide .sc-result { font-size: 2.5rem; }
.sc-calc.is-wide .sc-result.is-mid { font-size: 2rem; }
.sc-calc.is-wide .sc-result.is-long { font-size: 1.5rem; }
@media (max-width: 380px) {
  .sc-calc .sc-display { padding: 8px 10px 10px; }
  .sc-calc .sc-compact { gap: 5px; }
  .sc-calc .sc-key { font-size: 0.95rem; }
  .sc-calc .sc-key.is-num { font-size: 1.1rem; }
  .sc-calc .sc-key.is-small { font-size: 0.78rem; }
  .sc-calc .sc-segtext { min-width: 50px; padding: 0 10px; }
  .sc-calc .sc-result { font-size: 2rem; }
  .sc-calc .sc-result.is-mid { font-size: 1.5rem; }
  .sc-calc .sc-result.is-long { font-size: 1.2rem; }
}

@media (forced-colors: active) {
  .sc-calc .sc-key { border: 1px solid; }
  .sc-calc .sc-seg input:checked + .sc-segtext { outline: 2px solid; outline-offset: -4px; }
}

@media (prefers-reduced-motion: reduce) {
  .sc-calc *, .sc-calc *::before, .sc-hist * { transition: none !important; animation: none !important; }
  .sc-calc .sc-key:active, .sc-calc .sc-key.is-hit { transform: none; }
}