/* Calculator pages (apps/web/calculators/*). Built on redesign.css tokens. */

.calc-shell { display: flex; flex-direction: column; gap: 20px; }

.calc-toolbar { display: flex; justify-content: flex-end; align-items: center; gap: 10px; flex-wrap: wrap; }
.calc-unit-switch { display: inline-flex; border: 1px solid var(--border-default); border-radius: var(--radius-sm); overflow: hidden; }
.calc-unit-switch button { padding: 6px 14px; background: transparent; color: var(--text-secondary); border: 0; cursor: pointer; font-size: 13px; }
.calc-unit-switch button.active { background: var(--accent-blue-dim); color: var(--text-primary); }

.calc-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; align-items: start; }
@media (max-width: 860px) { .calc-grid { grid-template-columns: 1fr; } }

.calc-card { background: var(--bg-secondary); border: 1px solid var(--border-subtle); border-radius: var(--radius-md); padding: 22px; box-shadow: var(--shadow-sm); }
.calc-card h2 { font-size: 15px; letter-spacing: 0.04em; text-transform: uppercase; color: var(--text-secondary); margin: 0 0 16px; }
.calc-card h3 { font-size: 13px; letter-spacing: 0.04em; text-transform: uppercase; color: var(--text-muted); margin: 18px 0 8px; }

.calc-inputs { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
@media (max-width: 520px) { .calc-inputs { grid-template-columns: 1fr; } }
.calc-field { display: flex; flex-direction: column; gap: 6px; }
.calc-field label { font-size: 13px; color: var(--text-secondary); }
.calc-field .calc-unit { color: var(--text-muted); font-size: 12px; }
.calc-field input, .calc-field select, .calc-field textarea {
  width: 100%; padding: 10px 12px; border-radius: var(--radius-sm);
  border: 1px solid var(--border-default); background: var(--bg-tertiary);
  color: var(--text-primary); font-size: 15px; outline: none;
}
.calc-field textarea { resize: vertical; line-height: 1.5; font-family: inherit; }
.calc-field input:focus, .calc-field select:focus, .calc-field textarea:focus { border-color: var(--accent-blue); box-shadow: 0 0 0 3px var(--accent-blue-dim); }
.calc-field.invalid input { border-color: #ef4444; box-shadow: 0 0 0 3px rgba(239,68,68,0.15); }
.calc-hint { font-size: 12px; color: var(--text-muted); margin: 0; }

.calc-error { margin-top: 12px; padding: 10px 14px; border-radius: var(--radius-sm); background: rgba(239,68,68,0.1); border: 1px solid rgba(239,68,68,0.3); color: #fca5a5; font-size: 13px; }

.calc-outputs { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
@media (max-width: 520px) { .calc-outputs { grid-template-columns: 1fr; } }
.calc-output { background: var(--bg-tertiary); border: 1px solid var(--border-subtle); border-radius: var(--radius-sm); padding: 12px 14px; }
.calc-output .co-label { display: block; font-size: 12px; color: var(--text-muted); margin-bottom: 4px; }
.calc-output .co-value { font-size: 20px; font-weight: 600; color: var(--text-primary); }
.calc-output .co-unit { font-size: 12px; color: var(--text-secondary); margin-left: 4px; }
.calc-output.highlight { border-color: var(--border-brand); background: var(--bg-elevated); }
.calc-output.highlight .co-value { color: var(--accent-amber); }
.calc-empty { color: var(--text-muted); font-size: 14px; grid-column: 1 / -1; margin: 0; }

.calc-actions { display: flex; gap: 10px; margin-top: 16px; flex-wrap: wrap; }
.calc-actions button { padding: 8px 16px; border-radius: var(--radius-sm); border: 1px solid var(--border-default); background: var(--bg-tertiary); color: var(--text-secondary); cursor: pointer; font-size: 13px; }
.calc-actions button:hover { color: var(--text-primary); border-color: var(--border-hover); }

.calc-steps { margin: 0; padding-left: 20px; display: flex; flex-direction: column; gap: 6px; }
.calc-steps li { color: var(--text-secondary); font-size: 14px; font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; }
.calc-assumptions { margin: 0; padding-left: 20px; display: flex; flex-direction: column; gap: 4px; }
.calc-assumptions li { color: var(--text-muted); font-size: 13px; }
.calc-formula { margin: 16px 0 0; padding: 10px 14px; border-left: 3px solid var(--accent-blue); background: var(--bg-tertiary); border-radius: 0 var(--radius-sm) var(--radius-sm) 0; color: var(--text-secondary); font-size: 14px; }
.calc-disclosure { margin: 10px 0 0; font-size: 12px; color: var(--text-muted); }

.calc-qty-table { width: 100%; border-collapse: collapse; margin-bottom: 12px; }
.calc-qty-table th { text-align: left; font-size: 12px; color: var(--text-muted); font-weight: 500; padding: 4px 6px; }
.calc-qty-table td { padding: 4px 6px; }
.calc-qty-table input { width: 100%; padding: 8px 10px; border-radius: var(--radius-sm); border: 1px solid var(--border-default); background: var(--bg-tertiary); color: var(--text-primary); font-size: 14px; }
.calc-qty-table .qty-remove { background: transparent; border: 0; color: var(--text-muted); cursor: pointer; font-size: 16px; }
.calc-qty-table .qty-remove:hover { color: #ef4444; }

.calc-history { display: flex; flex-direction: column; gap: 8px; }
.calc-history-item { display: flex; justify-content: space-between; align-items: center; gap: 10px; padding: 10px 14px; border: 1px solid var(--border-subtle); border-radius: var(--radius-sm); background: var(--bg-tertiary); cursor: pointer; }
.calc-history-item:hover { border-color: var(--border-hover); }
.calc-history-item .ch-label { font-size: 13px; color: var(--text-secondary); }
.calc-history-item .ch-time { font-size: 12px; color: var(--text-muted); white-space: nowrap; }
.calc-history-empty { color: var(--text-muted); font-size: 13px; margin: 0; }
.calc-history-clear { align-self: flex-start; background: transparent; border: 0; color: var(--text-muted); cursor: pointer; font-size: 12px; padding: 4px 0; }
.calc-history-clear:hover { color: #ef4444; }

.calc-cta { margin-top: 28px; padding: 28px; border-radius: var(--radius-md); background: linear-gradient(135deg, rgba(229,65,122,0.08), rgba(59,130,246,0.08)); border: 1px solid var(--border-brand); text-align: center; }
.calc-cta h2 { margin: 0 0 8px; font-size: 20px; color: var(--text-primary); }
.calc-cta p { margin: 0 0 16px; color: var(--text-secondary); font-size: 14px; }
.calc-cta a { display: inline-block; padding: 10px 22px; border-radius: var(--radius-sm); background: var(--accent-blue); color: #fff; font-weight: 600; text-decoration: none; font-size: 14px; }
.calc-cta a:hover { filter: brightness(1.1); }
.calc-cta-actions { display: flex; gap: 10px; justify-content: center; flex-wrap: wrap; }
.calc-cta button { display: inline-block; padding: 10px 22px; border-radius: var(--radius-sm); background: transparent; border: 1px solid var(--accent-blue); color: var(--accent-blue); font-weight: 600; font-size: 14px; cursor: pointer; font-family: inherit; }
.calc-cta button:hover { background: rgba(59,130,246,0.12); }

/* ---------- generic modes: converter / currency / date / formula ---------- */

.calc-field-wide { grid-column: 1 / -1; }

/* Converter + currency: from | value | swap | to */
.conv-row { display: grid; grid-template-columns: 1.2fr 0.8fr auto 1.2fr; gap: 12px; align-items: end; grid-column: 1 / -1; }
@media (max-width: 640px) { .conv-row { grid-template-columns: 1fr 1fr; } .conv-row .conv-swap { grid-column: 1 / -1; justify-self: center; } }
.conv-swap { width: 42px; height: 42px; border-radius: 50%; border: 1px solid var(--border-default); background: var(--bg-tertiary); color: var(--text-primary); font-size: 18px; cursor: pointer; transition: transform 0.15s ease, border-color 0.15s ease; margin-bottom: 1px; }
.conv-swap:hover { border-color: var(--accent-blue); transform: rotate(180deg); }

/* All-units table and comparison rows */
.calc-details { margin-top: 14px; display: grid; grid-template-columns: repeat(auto-fill, minmax(230px, 1fr)); gap: 8px; max-height: 340px; overflow-y: auto; padding-right: 4px; }
.cd-row { display: flex; justify-content: space-between; align-items: baseline; gap: 10px; padding: 8px 12px; background: var(--bg-tertiary); border: 1px solid var(--border-subtle); border-radius: var(--radius-sm); }
.cd-row .cd-label { font-size: 12px; color: var(--text-muted); }
.cd-row .cd-value { font-size: 14px; font-weight: 600; color: var(--text-primary); font-variant-numeric: tabular-nums; white-space: nowrap; }

/* Extra area (historical charts etc.) */
.calc-extra { margin-top: 14px; }
.fx-hist-result { margin: 0 0 10px; font-size: 15px; font-weight: 600; color: var(--text-primary); }
.fx-hist-line { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; }
.fx-hist-line input { padding: 9px 12px; border-radius: var(--radius-sm); border: 1px solid var(--border-default); background: var(--bg-tertiary); color: var(--text-primary); font-size: 14px; }
.fx-hist-line button { padding: 9px 16px; border-radius: var(--radius-sm); border: 1px solid var(--accent-blue); background: transparent; color: var(--accent-blue); font-size: 13px; font-weight: 600; cursor: pointer; }
.fx-hist-line button:hover { background: rgba(59,130,246,0.12); }
.fx-spark { width: 100%; height: auto; background: var(--bg-tertiary); border: 1px solid var(--border-subtle); border-radius: var(--radius-sm); }
.fx-spark-label { font-size: 10px; fill: var(--text-muted); }

/* Date & tax: mode tabs / formula picker */
.calc-tabs { display: inline-flex; grid-column: 1 / -1; border: 1px solid var(--border-default); border-radius: var(--radius-sm); overflow: hidden; margin-bottom: 4px; flex-wrap: wrap; }
.calc-tabs button { padding: 8px 16px; background: transparent; color: var(--text-secondary); border: 0; cursor: pointer; font-size: 13px; font-family: inherit; }
.calc-tabs button.active { background: var(--accent-blue-dim); color: var(--text-primary); }
.calc-formula-picker { flex-wrap: wrap; }
.calc-inputs .calc-inputs { grid-column: 1 / -1; }
.calc-inputs .calc-tabs { grid-column: 1 / -1; }

/* All-in-one: keypad, subheads, formula dropdown */
.calc-keypad { display: flex; flex-wrap: wrap; gap: 6px; grid-column: 1 / -1; }
.calc-keypad button { padding: 6px 10px; border-radius: var(--radius-sm); border: 1px solid var(--border-default); background: var(--bg-tertiary); color: var(--text-secondary); font-size: 13px; font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; cursor: pointer; }
.calc-keypad button:hover { color: var(--text-primary); border-color: var(--accent-blue); }
/* Simple arithmetic calculator: fixed 4-column keypad with a wide equals key */
.arith-pad { display: grid; grid-template-columns: repeat(4, 1fr); gap: 8px; max-width: 420px; }
.arith-pad button { padding: 12px 0; font-size: 16px; text-align: center; }
.arith-pad .arith-equals { grid-column: 1 / -1; border-color: var(--accent-blue); color: var(--accent-blue); font-weight: 600; }
.calc-subhead { grid-column: 1 / -1; font-size: 13px; letter-spacing: 0.03em; color: var(--text-secondary); margin: 10px 0 0; text-transform: none; }
.calc-formula-select { min-width: 260px; }
.calc-formula-select select { width: 100%; padding: 9px 12px; border-radius: var(--radius-sm); border: 1px solid var(--border-default); background: var(--bg-tertiary); color: var(--text-primary); font-size: 14px; }

/* GPA-style editable rows: compact action buttons aligned to the input grid. */
.calc-row-btn { align-self: end; padding: 10px 14px; border-radius: var(--radius-sm); border: 1px solid var(--border-default); background: var(--bg-tertiary); color: var(--text-secondary); font-size: 13px; cursor: pointer; transition: border-color 0.15s ease, color 0.15s ease; white-space: nowrap; }
.calc-row-btn:hover { border-color: var(--accent-blue); color: var(--text-primary); }
.calc-row-add { margin-top: 4px; border-style: dashed; color: var(--accent-blue); }
.calc-row-add:hover { background: var(--accent-blue-dim); }