/* ============================================================
   PERCENTAGE CALCULATOR — Enhanced Styles
   ============================================================ */

/* --- Tabs --- */
.pct-tabs {
  display: flex;
  gap: 6px;
  margin-bottom: 16px;
  flex-wrap: wrap;
}

.pct-tab {
  padding: 8px 18px;
  border-radius: 8px;
  font-size: .85rem;
  font-weight: 600;
  cursor: pointer;
  transition: all .2s ease;
  background: var(--bg);
  color: var(--subtext);
  border: 1.5px solid var(--border);
  font-family: var(--system-fonts);
  position: relative;
  white-space: nowrap;
}

.pct-tab.active {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
  box-shadow: 0 2px 10px rgba(37,99,235,.25);
}

.pct-tab:hover:not(.active) {
  border-color: var(--primary);
  color: var(--primary);
  background: rgba(37,99,235,.04);
}

.pct-tab:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
  border-radius: 8px;
}


/* Tab info icon (tooltip trigger) */
.pct-tab-info {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 18px;
  height: 18px;
  font-size: 12px;
  border-radius: 50%;
  background: rgba(255,255,255,.25);
  color: inherit;
  cursor: help;
  margin-left: 3px;
  vertical-align: middle;
  transition: background .2s;
}

.pct-tab.active .pct-tab-info { background: rgba(255,255,255,.3); }

.pct-tab:not(.active) .pct-tab-info {
  background: var(--border);
  color: var(--subtext);
}


/* --- Tooltip Overlay --- */
.pct-tooltip-overlay {
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%,-50%);
  z-index: 9999;
  background: var(--card);
  border: 1.5px solid var(--primary);
  border-radius: var(--radius-lg);
  box-shadow: 0 20px 60px rgba(0,0,0,.3);
  padding: 28px 30px;
  max-width: 440px;
  width: calc(100% - 32px);
  animation: pctFadeIn .25s ease;
}

.pct-tooltip-overlay.hidden { display: none; }

.pct-tooltip-content { position: relative; padding-right: 4px; }

.pct-tooltip-close {
  position: absolute;
  top: -14px;
  right: -14px;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--card);
  border: 1.5px solid var(--border);
  color: var(--subtext);
  font-size: .85rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all .2s ease;
  font-family: var(--system-fonts);
}

.pct-tooltip-close:hover {
  background: var(--error);
  border-color: var(--error);
  color: #fff;
}

.pct-tooltip-content strong { font-size: 1.05rem; color: var(--text); display: block; margin-bottom: 12px; }

.pct-tooltip-content p { font-size: .88rem; color: var(--subtext); line-height: 1.6; margin-bottom: 8px; }

.pct-tooltip-content p:last-child { margin-bottom: 0; }

.pct-tooltip-example { background: var(--bg); padding: 12px 14px; border-radius: var(--radius-sm); border-left: 3px solid var(--primary); margin-top: 10px; font-size: .85rem; }


/* --- Presets --- */
.pct-presets {
  display: flex;
  gap: 6px;
  margin-bottom: 18px;
  flex-wrap: wrap;
  align-items: center;
}

.pct-preset-label {
  font-size: .75rem;
  font-weight: 700;
  color: var(--subtext);
  margin-right: 4px;
  text-transform: uppercase;
  letter-spacing: .04em;
}

.pct-preset {
  padding: 5px 14px;
  border-radius: 6px;
  font-size: .78rem;
  font-weight: 700;
  cursor: pointer;
  transition: all .2s ease;
  background: var(--bg);
  color: var(--subtext);
  border: 1.5px solid var(--border);
  font-family: var(--system-fonts);
}

.pct-preset:hover {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
  transform: translateY(-1px);
}

.pct-preset:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}


/* --- Panels --- */
.pct-panel {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.pct-field-group {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}

@media (max-width: 480px) {
  .pct-field-group { grid-template-columns: 1fr; }
}

.pct-field {
  display: flex;
  flex-direction: column;
  gap: 5px;
}

.pct-label {
  font-size: .82rem;
  font-weight: 600;
  color: var(--subtext);
  display: flex;
  align-items: center;
  gap: 8px;
}

.pct-input {
  width: 100%;
  padding: 11px 14px;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 1rem;
  font-weight: 600;
  color: var(--text);
  background: var(--card);
  transition: border-color .2s ease, box-shadow .2s ease;
}

.pct-input:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(37,99,235,.12);
}

.pct-input::placeholder {
  color: var(--border);
  font-weight: 400;
  font-size: .9rem;
}

.pct-field-hint {
  font-size: .7rem;
  color: var(--subtext);
  opacity: .7;
  line-height: 1.3;
}


/* --- Swap Button --- */
.pct-swap-btn {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 4px 12px;
  border-radius: 6px;
  font-size: .75rem;
  font-weight: 600;
  cursor: pointer;
  background: var(--bg);
  color: var(--primary);
  border: 1.5px solid var(--primary);
  transition: all .2s ease;
  font-family: var(--system-fonts);
  margin-left: auto;
  width: fit-content;
}

.pct-swap-btn:hover {
  background: var(--primary);
  color: #fff;
  transform: translateY(-1px);
}

.pct-swap-btn:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}


/* --- Result Card --- */
.pct-result {
  margin-top: 18px;
  padding: 22px 20px;
  background: var(--bg);
  border-radius: var(--radius);
  border: 1.5px solid var(--border);
  text-align: center;
  transition: all .35s cubic-bezier(.4,0,.2,1);
  transform-origin: top center;
}

.pct-result.hidden {
  display: none;
}

.pct-result.pct-result--visible {
  animation: pctSlideDown .35s cubic-bezier(.4,0,.2,1);
}


.pct-result-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 8px;
  gap: 8px;
  flex-wrap: wrap;
}

.pct-result-badge {
  font-size: .6rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .06em;
  padding: 3px 8px;
  border-radius: 4px;
  background: rgba(37,99,235,.1);
  color: var(--primary);
  border: 1px solid rgba(37,99,235,.15);
}

.pct-result-label {
  font-size: .85rem;
  font-weight: 600;
  color: var(--subtext);
  flex: 1;
  text-align: left;
}

.pct-result-actions {
  display: flex;
  gap: 4px;
  flex-shrink: 0;
}

.pct-copy-btn {
  font-size: .68rem;
  font-weight: 600;
  padding: 3px 10px;
  border-radius: 6px;
  background: var(--card);
  color: var(--subtext);
  border: 1.5px solid var(--border);
  cursor: pointer;
  transition: all .2s ease;
  font-family: var(--system-fonts);
  white-space: nowrap;
  display: inline-flex;
  align-items: center;
  gap: 3px;
}

.pct-copy-btn:hover {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
}

.pct-copy-btn--copied {
  background: var(--success) !important;
  color: #fff !important;
  border-color: var(--success) !important;
}


.pct-result-val {
  font-size: 2.4rem;
  font-weight: 800;
  color: var(--primary);
  margin: 10px 0;
  line-height: 1.2;
  transition: color .3s ease;
  word-break: break-word;
}

/* Color-coded result states */
.pct-result-val--increase { color: var(--success) !important; }

.pct-result-val--decrease { color: var(--error) !important; }

.pct-result-val--error { color: var(--error) !important; font-size: 1.2rem !important; }


.pct-result-formula {
  font-size: .85rem;
  color: var(--subtext);
  font-family: 'SFMono-Regular', Consolas, 'Liberation Mono', monospace;
  background: var(--card);
  padding: 8px 12px;
  border-radius: 6px;
  display: inline-block;
  border: 1px solid var(--border);
  margin-top: 4px;
}


.pct-result-error {
  display: none;
  margin-top: 10px;
  padding: 10px 14px;
  background: rgba(239,68,68,.08);
  border: 1px solid rgba(239,68,68,.2);
  border-radius: var(--radius-sm);
  font-size: .85rem;
  color: var(--error);
  text-align: left;
}

.pct-result-error--visible {
  display: flex;
  align-items: flex-start;
  gap: 8px;
}

.pct-result-error::before {
  content: '!';
  display: flex;
  align-items: center;
  justify-content: center;
  width: 20px;
  height: 20px;
  min-width: 20px;
  background: var(--error);
  color: #fff;
  border-radius: 50%;
  font-size: .75rem;
  font-weight: 800;
}


/* --- Progress Bar --- */
.pct-progress-wrap {
  margin-top: 14px;
  padding: 14px 16px;
  background: var(--card);
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
}

.pct-progress-header {
  display: flex;
  justify-content: space-between;
  margin-bottom: 6px;
  font-size: .78rem;
  font-weight: 600;
  color: var(--subtext);
}

.pct-progress-track {
  height: 10px;
  background: var(--border);
  border-radius: 99px;
  overflow: hidden;
}

.pct-progress-fill {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, #2563eb, #22c55e);
  border-radius: 99px;
  transition: width .5s cubic-bezier(.4,0,.2,1);
}


/* --- Chart Visualization --- */
.pct-chart-wrap {
  margin-top: 16px;
  padding: 12px 16px 8px;
  background: var(--card);
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  text-align: center;
  animation: pctSlideDown .35s cubic-bezier(.4,0,.2,1);
  overflow: hidden;
}

.pct-chart-canvas {
  display: block;
  margin: 0 auto;
  max-width: 100%;
  height: auto;
}

.pct-chart-legend {
  display: flex;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
  margin-top: 4px;
  padding-top: 8px;
  border-top: 1px solid var(--border);
}

.pct-chart-legend-item {
  display: flex;
  align-items: center;
  gap: 5px;
  font-size: .72rem;
  font-weight: 600;
  color: var(--subtext);
}

.pct-chart-legend-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  flex-shrink: 0;
}


@media (max-width: 480px) {
  .pct-chart-wrap { padding: 8px 8px 4px; }
}


/* --- Dark Mode Overrides --- */
[data-theme="dark"] .pct-tab { background: var(--card); }

[data-theme="dark"] .pct-tab.active { background: var(--primary); }

[data-theme="dark"] .pct-result { background: var(--card); }

[data-theme="dark"] .pct-result-formula { background: var(--bg); }

[data-theme="dark"] .pct-progress-wrap { background: var(--bg); }

[data-theme="dark"] .pct-chart-wrap { background: var(--bg); }

[data-theme="dark"] .pct-tooltip-overlay { background: var(--card); }


/* --- Responsive --- */
@media (max-width: 480px) {
  .pct-result-val { font-size: 1.8rem; }
  .pct-result-header { flex-direction: column; align-items: flex-start; }
  .pct-result-actions { align-self: stretch; }
  .pct-copy-btn { flex: 1; justify-content: center; }
  .pct-result-label { text-align: left; width: 100%; }
  .pct-preset-label { display: none; }
  .pct-tabs { gap: 4px; }
  .pct-tab { padding: 6px 12px; font-size: .8rem; }
}


@media (min-width: 481px) and (max-width: 768px) {
  .pct-result-val { font-size: 2rem; }
}