/* =========================================================================
   Utility-cluster tools — Calculator, Scratch pad, World clock
   ========================================================================= */

/* ===================== CALCULATOR ===================== */
.calc-tool {
  height: 100%;
  display: grid;
  grid-template-columns: minmax(320px, 420px) 1fr;
  gap: 24px;
  padding: 28px 40px 40px;
  max-width: 980px;
  margin: 0 auto;
  overflow: hidden;
}
@media (max-width: 820px) {
  .calc-tool { grid-template-columns: 1fr; max-width: 480px; overflow-y: auto; }
  .calc-history { max-height: 280px; }
}

.calc-main {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 18px;
  padding: 18px;
  display: flex; flex-direction: column;
  gap: 12px;
}

.calc-memory {
  display: flex; align-items: center; gap: 6px;
}
.calc-mem-btn {
  padding: 6px 10px;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: 8px;
  font-family: inherit;
  font-size: 11px; font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--text-muted);
  cursor: pointer;
  transition: all 120ms;
}
.calc-mem-btn:hover { color: var(--text-hi); border-color: var(--color-primary); }
.calc-mem-btn.percent { margin-left: auto; color: var(--color-primary); }
.calc-mem-ind {
  flex: 1;
  display: flex; align-items: center; gap: 6px;
  padding: 4px 10px;
  font-size: 11px;
  color: var(--text-faint);
  font-variant-numeric: tabular-nums;
  font-weight: 600;
  letter-spacing: 0.04em;
}
.calc-mem-ind.is-on { color: var(--color-primary); }
.calc-mem-ind em { font-style: normal; color: var(--text-muted); font-size: 11px; }

.calc-display {
  display: flex; flex-direction: column;
  align-items: flex-end;
  padding: 18px 16px 14px;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: 12px;
  min-height: 100px;
  justify-content: flex-end;
}
.calc-expr {
  font-size: 13px;
  color: var(--text-muted);
  font-variant-numeric: tabular-nums;
  min-height: 18px;
  margin-bottom: 4px;
  font-feature-settings: "tnum";
  text-align: right;
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
  max-width: 100%;
}
.calc-out {
  font-size: 44px; font-weight: 700;
  letter-spacing: -0.025em;
  font-variant-numeric: tabular-nums;
  color: var(--text-hi);
  line-height: 1.05;
  font-feature-settings: "tnum";
  word-break: break-all;
}

.calc-keypad {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 8px;
}
.calc-key {
  padding: 16px 0;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: 12px;
  font-family: inherit;
  font-size: 18px; font-weight: 600;
  color: var(--text-hi);
  cursor: pointer;
  transition: transform 80ms, background 120ms, border-color 120ms;
  font-variant-numeric: tabular-nums;
}
.calc-key:hover {
  background: rgba(var(--primary-rgb, 127,13,242), 0.06);
  border-color: rgba(var(--primary-rgb, 127,13,242), 0.4);
}
.calc-key:active { transform: scale(0.96); }
.calc-key.op {
  color: var(--text-md);
  font-size: 15px;
  font-weight: 700;
}
.calc-key.op.accent {
  color: var(--color-primary);
  background: rgba(var(--primary-rgb, 127,13,242), 0.06);
  border-color: rgba(var(--primary-rgb, 127,13,242), 0.18);
  font-size: 22px;
}
.calc-key.eq {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: #fff;
  box-shadow: 0 6px 16px rgba(var(--primary-rgb, 127,13,242), 0.3);
}
.calc-key.eq:hover { filter: brightness(1.1); }

.calc-history {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 18px;
  padding: 16px 18px;
  display: flex; flex-direction: column;
  overflow: hidden;
}
.calc-history-head {
  display: flex; align-items: center; justify-content: space-between;
  margin-bottom: 12px;
}
.calc-history-head h3 {
  margin: 0;
  font-size: 12px; font-weight: 700;
  text-transform: uppercase; letter-spacing: 0.1em;
  color: var(--text-muted);
}
.calc-history-clear {
  background: transparent; border: 0; cursor: pointer;
  color: var(--text-muted);
  padding: 4px; border-radius: 6px;
  display: inline-flex;
}
.calc-history-clear:hover { color: var(--text-hi); background: var(--color-bg); }
.calc-history-clear .material-symbols-outlined { font-size: 16px; }
.calc-history-empty {
  flex: 1;
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  text-align: center;
  color: var(--text-muted);
  font-size: 13px;
  gap: 6px;
  padding: 24px 12px;
}
.calc-history-empty .material-symbols-outlined {
  font-size: 32px; color: var(--text-faint);
  margin-bottom: 4px;
}
.calc-hint {
  font-size: 11.5px; color: var(--text-faint);
}
.calc-hint kbd {
  padding: 1px 6px;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: 4px;
  font-size: 10.5px;
  font-family: inherit;
}
.calc-history-list {
  list-style: none; padding: 0; margin: 0;
  overflow-y: auto;
  display: flex; flex-direction: column;
  gap: 2px;
}
.calc-history-row {
  width: 100%;
  display: flex; flex-direction: column;
  gap: 2px;
  align-items: flex-end;
  padding: 8px 12px;
  background: transparent;
  border: 0;
  border-radius: 8px;
  cursor: pointer;
  font-family: inherit;
  text-align: right;
  transition: background 120ms;
}
.calc-history-row:hover { background: var(--color-bg); }
.calc-history-expr {
  font-size: 12px;
  color: var(--text-muted);
  font-variant-numeric: tabular-nums;
}
.calc-history-result {
  font-size: 15px; font-weight: 600;
  color: var(--text-hi);
  font-variant-numeric: tabular-nums;
}

/* ===================== SCRATCH PAD ===================== */
.scratch-tool {
  height: 100%;
  display: flex; flex-direction: column;
  padding: 24px 36px 0;
  max-width: 900px;
  margin: 0 auto;
}
.scratch-head {
  display: flex; align-items: flex-end; justify-content: space-between;
  gap: 16px;
  margin-bottom: 14px;
  flex-wrap: wrap;
}
.scratch-head-text h1 {
  margin: 0;
  font-size: 22px; font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text-hi);
}
.scratch-head-text p {
  margin: 4px 0 0;
  font-size: 12.5px;
  color: var(--text-muted);
}
.scratch-head-actions {
  display: flex; gap: 8px;
}
.scratch-text {
  flex: 1;
  width: 100%;
  padding: 22px 26px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 14px;
  font-family: inherit;
  font-size: 15px;
  line-height: 1.65;
  color: var(--text-hi);
  resize: none;
  outline: none;
  transition: border-color 120ms;
}
.scratch-text:focus { border-color: var(--color-primary); }
.scratch-text.is-mono {
  font-family: 'JetBrains Mono', 'Fira Code', ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-size: 13.5px;
  line-height: 1.6;
}
.scratch-text::placeholder { color: var(--text-faint); }

.scratch-foot {
  display: flex; align-items: center; gap: 8px;
  padding: 10px 4px 16px;
  font-size: 11.5px;
  color: var(--text-muted);
  font-variant-numeric: tabular-nums;
}
.scratch-foot .dot { color: var(--text-faint); }
.scratch-saved {
  display: inline-flex; align-items: center; gap: 5px;
  color: var(--text-muted);
}
.scratch-saved .material-symbols-outlined {
  font-size: 14px; color: #34d399;
}

/* ===================== WORLD CLOCK ===================== */
.wc-tool {
  height: 100%;
  overflow-y: auto;
  padding: 28px 40px 60px;
}

.wc-head {
  display: flex; align-items: flex-end; justify-content: space-between;
  gap: 16px;
  margin-bottom: 22px;
  flex-wrap: wrap;
}
.wc-head h1 {
  margin: 0;
  font-size: 22px; font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text-hi);
}
.wc-head p {
  margin: 4px 0 0;
  font-size: 12.5px;
  color: var(--text-muted);
}
.wc-head-actions { display: flex; gap: 8px; flex-wrap: wrap; }

.wc-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 14px;
}

.wc-card {
  position: relative;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 16px;
  padding: 16px 18px;
  overflow: hidden;
  transition: border-color 120ms;
}
.wc-card::before {
  content: '';
  position: absolute; inset: 0;
  pointer-events: none;
  opacity: 0.7;
}
.wc-card.is-day::before {
  background: radial-gradient(ellipse 90% 60% at 80% -10%, hsla(46, 90%, 60%, 0.10), transparent 60%);
}
.wc-card.is-night::before {
  background: radial-gradient(ellipse 90% 60% at 80% -10%, hsla(228, 60%, 60%, 0.10), transparent 60%);
}
.wc-card.is-home {
  border-color: rgba(var(--primary-rgb, 127,13,242), 0.45);
}
.wc-card > * { position: relative; }

.wc-card-head {
  display: flex; align-items: flex-start; justify-content: space-between;
  gap: 8px;
  margin-bottom: 12px;
}
.wc-card-title { min-width: 0; }
.wc-card-city {
  font-size: 16px; font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--text-hi);
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.wc-card-region {
  font-size: 11.5px;
  color: var(--text-muted);
  display: inline-flex; align-items: center; gap: 6px;
  margin-top: 2px;
}
.wc-card-home-tag {
  font-size: 9px; font-weight: 700;
  text-transform: uppercase; letter-spacing: 0.1em;
  padding: 2px 6px;
  background: rgba(var(--primary-rgb, 127,13,242), 0.15);
  color: var(--color-primary);
  border-radius: 4px;
}
.wc-card-actions { display: flex; gap: 2px; flex-shrink: 0; }
.wc-icon-btn {
  background: transparent; border: 0; cursor: pointer;
  padding: 4px; border-radius: 6px;
  color: var(--text-faint);
  display: inline-flex;
  transition: all 120ms;
}
.wc-icon-btn:hover { background: var(--color-bg); color: var(--text-hi); }
.wc-icon-btn .material-symbols-outlined { font-size: 14px; }

.wc-card-body {
  display: flex; align-items: center; gap: 14px;
}

/* Analog face */
.wc-face { flex-shrink: 0; }
.wc-face-ring {
  fill: var(--color-bg);
  stroke: var(--color-border);
  stroke-width: 1.5;
}
.wc-card.is-day .wc-face-ring  { fill: hsla(46, 70%, 92%, 0.9); }
.wc-card.is-night .wc-face-ring { fill: hsla(228, 30%, 14%, 0.85); }
html.light .wc-card.is-night .wc-face-ring { fill: hsla(228, 30%, 22%, 0.9); }
.wc-face-tick {
  stroke: var(--text-muted);
  stroke-width: 1;
}
.wc-face-tick.is-major {
  stroke: var(--text-hi);
  stroke-width: 1.8;
}
.wc-card.is-night .wc-face-tick { stroke: hsla(228, 30%, 70%, 0.6); }
.wc-card.is-night .wc-face-tick.is-major { stroke: hsla(228, 30%, 90%, 0.95); }
.wc-card.is-day .wc-face-tick { stroke: hsla(30, 30%, 30%, 0.5); }
.wc-card.is-day .wc-face-tick.is-major { stroke: hsla(30, 50%, 20%, 0.85); }

.wc-face-hand {
  stroke-linecap: round;
  stroke: var(--text-hi);
  transition: transform 600ms cubic-bezier(0.4, 1.4, 0.5, 1);
  transform-origin: 50px 50px;
}
.wc-card.is-day .wc-face-hand { stroke: hsla(30, 50%, 20%, 0.95); }
.wc-card.is-night .wc-face-hand { stroke: hsla(228, 30%, 95%, 0.95); }

.wc-face-hour   { stroke-width: 3.5; }
.wc-face-minute { stroke-width: 2.5; }
.wc-face-second {
  stroke-width: 1.2;
  stroke: var(--color-primary);
  transition: transform 950ms linear;
}
.wc-face-cap {
  fill: var(--color-primary);
  stroke: none;
}

.wc-card-digital {
  flex: 1;
  min-width: 0;
}
.wc-card-time {
  font-size: 30px; font-weight: 700;
  letter-spacing: -0.02em;
  font-variant-numeric: tabular-nums;
  color: var(--text-hi);
  line-height: 1.05;
  font-feature-settings: "tnum";
  display: inline-flex; align-items: baseline; gap: 0;
}
.wc-card-colon {
  margin: 0 1px;
  animation: wcBlink 1s steps(2, end) infinite;
}
.wc-card-colon-sec { animation: none; opacity: 0.6; }
@keyframes wcBlink {
  50% { opacity: 0.35; }
}
.wc-card-sec {
  font-size: 18px; color: var(--text-muted);
  font-weight: 600;
  margin-left: 2px;
}
.wc-card-ampm {
  font-size: 12px; color: var(--text-muted);
  margin-left: 6px;
  font-weight: 600;
  text-transform: uppercase;
}
.wc-card-meta {
  display: flex; align-items: center; gap: 8px;
  margin-top: 6px;
  font-size: 11.5px;
  color: var(--text-muted);
}
.wc-card-offset {
  margin-left: auto;
  padding: 2px 8px;
  background: var(--color-bg);
  border-radius: 999px;
  font-variant-numeric: tabular-nums;
  font-weight: 600;
  color: var(--text-lo);
}
.wc-card.is-home .wc-card-offset {
  color: var(--color-primary);
  background: rgba(var(--primary-rgb, 127,13,242), 0.1);
}

/* Empty state */
.wc-empty {
  display: flex; flex-direction: column; align-items: center;
  text-align: center;
  padding: 60px 24px;
  background: var(--color-surface);
  border: 1.5px dashed var(--color-border);
  border-radius: 16px;
  color: var(--text-lo);
}
.wc-empty > .material-symbols-outlined {
  font-size: 36px; color: var(--text-faint);
  margin-bottom: 10px;
}
.wc-empty .title { font-size: 16px; font-weight: 700; color: var(--text-hi); }
.wc-empty .sub { font-size: 12.5px; color: var(--text-muted); margin: 4px 0 16px; }

/* Picker modal */
.wc-picker-overlay {
  position: fixed; inset: 0;
  background: rgba(0,0,0,0.5);
  backdrop-filter: blur(4px);
  z-index: 100;
  display: flex; align-items: flex-start; justify-content: center;
  padding: 80px 16px 16px;
  animation: wcFadeIn 160ms;
}
@keyframes wcFadeIn { from { opacity: 0; } to { opacity: 1; } }
.wc-picker {
  width: 100%;
  max-width: 540px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 16px;
  box-shadow: 0 30px 80px rgba(0,0,0,0.4);
  display: flex; flex-direction: column;
  max-height: 70vh;
  overflow: hidden;
}
.wc-picker-head {
  display: flex; align-items: center; gap: 10px;
  padding: 14px 16px;
  border-bottom: 1px solid var(--color-border);
}
.wc-picker-head > .material-symbols-outlined {
  font-size: 18px; color: var(--text-muted);
}
.wc-picker-head input {
  flex: 1; background: transparent; border: 0; outline: none;
  font-family: inherit;
  font-size: 14px; color: var(--text-hi);
}
.wc-picker-head input::placeholder { color: var(--text-faint); }
.wc-picker-close {
  background: transparent; border: 0; cursor: pointer;
  padding: 4px; border-radius: 6px;
  color: var(--text-muted);
  display: inline-flex;
}
.wc-picker-close:hover { color: var(--text-hi); background: var(--color-bg); }
.wc-picker-close .material-symbols-outlined { font-size: 16px; }

.wc-picker-results {
  overflow-y: auto;
  padding: 4px;
}
.wc-picker-empty {
  padding: 28px;
  text-align: center;
  color: var(--text-muted);
  font-size: 13px;
}
.wc-picker-row {
  display: grid;
  grid-template-columns: 1fr 1fr auto;
  gap: 10px;
  width: 100%;
  text-align: left;
  padding: 10px 14px;
  background: transparent; border: 0; cursor: pointer;
  border-radius: 8px;
  font-family: inherit;
  align-items: baseline;
  transition: background 120ms;
}
.wc-picker-row:hover { background: var(--color-bg); }
.wc-picker-row-name {
  font-size: 13.5px; font-weight: 600; color: var(--text-hi);
}
.wc-picker-row-region {
  font-size: 12px; color: var(--text-lo);
}
.wc-picker-row-zone {
  font-size: 11px; color: var(--text-muted);
  font-family: 'JetBrains Mono', ui-monospace, monospace;
}