:root {
  --tf-accent: #2c3e6b;
  --tf-accent-hover: #212f52;
  --tf-accent-wash: #edf1f8;
  --tf-accent-soft: #c4d1e8;
  --scic-card-bg: var(--tf-surface, #ffffff);
  --scic-border: var(--tf-rule, #ddd8d0);
  --scic-text: var(--tf-ink, #12100e);
  --scic-muted: var(--tf-ink-soft, #5c574f);
  --scic-display-bg: #f8fafc;
  --scic-btn-bg: #ffffff;
  --scic-btn-border: #ddd8d0;
}

.scic-main {
  max-width: 900px;
  margin: 0 auto;
  padding: 1.5rem 1rem 3rem;
  width: 100%;
  box-sizing: border-box;
}

.scic-wrap {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.scic-calc-card {
  background: var(--scic-card-bg);
  border: 1px solid var(--scic-border);
  border-radius: 4px;
  padding: 1.25rem;
  box-shadow: none;
}

/* Display screen */
.scic-screen {
  background: var(--scic-display-bg);
  border: 1px solid var(--scic-border);
  border-radius: 4px;
  padding: 1rem 1.25rem;
  margin-bottom: 1.25rem;
  text-align: right;
  min-height: 80px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.scic-screen-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.8rem;
  color: var(--scic-muted);
}

.scic-mode-indicators {
  display: flex;
  gap: 0.5rem;
  font-family: var(--tf-font-mono, monospace);
  font-weight: 600;
}

.scic-indicator {
  padding: 0.15rem 0.4rem;
  border-radius: 2px;
  background: var(--tf-accent-wash);
  color: var(--tf-accent);
}

.scic-expression {
  font-size: 1rem;
  color: var(--scic-muted);
  font-family: var(--tf-font-mono, monospace);
  overflow-x: auto;
  white-space: nowrap;
  min-height: 1.25rem;
}

.scic-display-val {
  font-size: 2rem;
  font-weight: 700;
  color: var(--scic-text);
  font-family: var(--tf-font-mono, monospace);
  font-variant-numeric: tabular-nums;
  overflow-x: auto;
  white-space: nowrap;
  letter-spacing: -0.02em;
}

/* Quick formulas bar */
.scic-presets-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-bottom: 1rem;
  align-items: center;
}

.scic-presets-label {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  color: var(--scic-muted);
  margin-right: 0.25rem;
}

.scic-preset-chip {
  background: var(--tf-accent-wash);
  color: var(--tf-accent);
  border: 1px solid var(--tf-accent-soft);
  border-radius: 4px;
  padding: 0.25rem 0.5rem;
  font-size: 0.75rem;
  cursor: pointer;
}

.scic-preset-chip:hover {
  background: var(--tf-accent);
  color: #ffffff;
}

/* Keypad Grid */
.scic-keypad {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 0.5rem;
}

@media (max-width: 640px) {
  .scic-keypad {
    grid-template-columns: repeat(4, 1fr);
  }
}

.scic-btn {
  background: var(--scic-btn-bg);
  border: 1px solid var(--scic-btn-border);
  color: var(--scic-text);
  border-radius: 4px;
  padding: 0.65rem 0.4rem;
  font-size: 0.95rem;
  font-weight: 500;
  font-family: var(--tf-font-mono, monospace);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.12s ease;
  user-select: none;
}

.scic-btn:hover {
  background: var(--tf-accent-wash);
  border-color: var(--tf-accent-soft);
}

.scic-btn:active {
  transform: translateY(1px);
}

.scic-btn-fn {
  background: var(--tf-accent-wash);
  color: var(--tf-accent);
  font-size: 0.85rem;
  font-weight: 600;
}

.scic-btn-op {
  background: var(--tf-accent-wash);
  color: var(--tf-accent);
  font-weight: 700;
  font-size: 1.05rem;
}

.scic-btn-primary {
  background: var(--tf-accent);
  color: #ffffff;
  border-color: var(--tf-accent);
  font-weight: 700;
  font-size: 1.15rem;
}

.scic-btn-primary:hover {
  background: var(--tf-accent-hover);
}

.scic-btn-danger {
  color: #b91c1c;
  background: #fef2f2;
  border-color: #fecaca;
}

/* History tape section */
.scic-history-card {
  background: var(--scic-card-bg);
  border: 1px solid var(--scic-border);
  border-radius: 4px;
  padding: 1.25rem;
}

.scic-history-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.75rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--scic-border);
}

.scic-history-title {
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--scic-text);
  font-family: var(--tf-font-display, Charter, Georgia, serif);
}

.scic-history-clear {
  background: transparent;
  border: none;
  font-size: 0.75rem;
  color: var(--scic-muted);
  cursor: pointer;
  text-decoration: underline;
}

.scic-history-list {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  max-height: 200px;
  overflow-y: auto;
}

.scic-history-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.4rem 0.6rem;
  border-radius: 2px;
  background: var(--scic-display-bg);
  font-family: var(--tf-font-mono, monospace);
  font-size: 0.85rem;
  cursor: pointer;
}

.scic-history-item:hover {
  background: var(--tf-accent-wash);
}

.scic-history-expr {
  color: var(--scic-muted);
}

.scic-history-res {
  font-weight: 700;
  color: var(--tf-accent);
}

.scic-empty-history {
  font-size: 0.85rem;
  color: var(--scic-muted);
  font-style: italic;
  text-align: center;
  padding: 1rem;
}

/* tf:dark-palette — generated by migrate_chrome.py */
/* Neutrals inherit the shared chrome tokens so all tools share one
   ground; brand hues are kept and lightened, never inverted. */
[data-theme="dark"] {
  --tf-accent: #6d86c3;
  --tf-accent-hover: var(--tf-ink);
  --tf-accent-wash: var(--tf-surface);
  --tf-accent-soft: #8aa3d1;
  --scic-display-bg: var(--tf-surface);
  --scic-btn-bg: var(--tf-surface);
  --scic-btn-border: var(--tf-rule);
}