/* ── Calculator pages ─────────────────────────────────────────────────────── */

.calc-page { max-width: 1120px; margin: 0 auto; padding: 2rem 1.5rem 4rem; }

/* Hero */
.calc-hero { margin-bottom: 2.5rem; }
.calc-hero h1 { font-size: 2.25rem; font-weight: 800; letter-spacing: -0.02em; color: var(--fg); margin: 0 0 0.5rem; }
.calc-hero .calc-subtitle { font-size: 1.05rem; color: var(--muted); line-height: 1.6; max-width: 640px; }

/* Breadcrumb */
.calc-breadcrumb { display: flex; align-items: center; gap: 0.4rem; font-size: 0.8rem; font-family: var(--font-mono, 'JetBrains Mono', monospace); text-transform: uppercase; letter-spacing: 0.06em; color: var(--muted); margin-bottom: 1.5rem; }
.calc-breadcrumb a { color: var(--muted); text-decoration: none; }
.calc-breadcrumb a:hover { color: var(--fg); }
.calc-breadcrumb .sep { opacity: 0.5; }

/* Calculator card */
.calc-card { background: var(--bg); border: 1px solid var(--line); border-radius: var(--radius, 12px); padding: 2rem; margin-bottom: 2.5rem; }

.calc-form { display: grid; grid-template-columns: 1fr 1fr; gap: 1.25rem; }
@media (max-width: 600px) { .calc-form { grid-template-columns: 1fr; } }

.calc-field { display: flex; flex-direction: column; gap: 0.35rem; }
.calc-field.full-width { grid-column: 1 / -1; }
.calc-field label { font-size: 0.82rem; font-weight: 600; color: var(--fg-soft); letter-spacing: 0.01em; }
.calc-field input,
.calc-field select { font-size: 1rem; padding: 0.6rem 0.75rem; border: 1px solid var(--line); border-radius: 8px; background: var(--bg); color: var(--fg); font-variant-numeric: tabular-nums; transition: border-color 0.15s; }
.calc-field input:focus,
.calc-field select:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 2px color-mix(in srgb, var(--accent) 12%, transparent); }
.calc-field input[type="number"] { -moz-appearance: textfield; }
.calc-field input[type="number"]::-webkit-inner-spin-button,
.calc-field input[type="number"]::-webkit-outer-spin-button { -webkit-appearance: none; margin: 0; }

.calc-field .field-hint { font-size: 0.75rem; color: var(--muted); }

/* Checkbox field */
.calc-checkbox { flex-direction: row; align-items: center; gap: 0.5rem; }
.calc-checkbox input[type="checkbox"] { width: 18px; height: 18px; accent-color: var(--accent); }

/* Result area */
.calc-results { margin-top: 1.5rem; padding-top: 1.5rem; border-top: 1px solid var(--line); }
.calc-result-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 1rem; }
.calc-result-item { text-align: center; padding: 1rem; background: var(--bg-soft, #fafafa); border-radius: var(--radius-sm, 8px); }
.calc-result-item .result-label { font-size: 0.75rem; font-family: var(--font-mono, 'JetBrains Mono', monospace); text-transform: uppercase; letter-spacing: 0.08em; color: var(--muted); margin-bottom: 0.3rem; }
.calc-result-item .result-value { font-size: 1.75rem; font-weight: 700; color: var(--fg); font-variant-numeric: tabular-nums; letter-spacing: -0.02em; transition: color 0.2s; }
.calc-result-item .result-value.positive { color: var(--good, #16a34a); }
.calc-result-item .result-value.negative { color: var(--bad, #dc2626); }

/* Calculate button */
.calc-btn { display: inline-flex; align-items: center; justify-content: center; padding: 0.7rem 1.5rem; font-size: 0.95rem; font-weight: 600; color: #fff; background: var(--accent); border: none; border-radius: 8px; cursor: pointer; transition: opacity 0.15s; margin-top: 0.5rem; }
.calc-btn:hover { opacity: 0.85; }

/* Chart area inside calculator card */
.calc-chart-wrap { margin-top: 1.5rem; padding-top: 1.5rem; border-top: 1px solid var(--line); position: relative; height: 280px; }
.calc-chart-wrap canvas { width: 100% !important; height: 100% !important; }
.calc-chart-legend { display: flex; align-items: center; gap: 1rem; margin-top: 0.75rem; font-size: 0.78rem; color: var(--muted); }
.calc-chart-legend-item { display: flex; align-items: center; gap: 0.3rem; }
.calc-chart-legend-item::before { content: ''; display: inline-block; width: 10px; height: 10px; border-radius: 2px; }
.calc-chart-legend-item.legend-principal::before { background: var(--accent); }
.calc-chart-legend-item.legend-interest::before { background: var(--good, #16a34a); }
.calc-chart-legend-item.legend-contributions::before { background: color-mix(in srgb, var(--accent) 40%, transparent); }
.calc-chart-legend-item.legend-total::before { background: var(--accent); }
.calc-chart-legend-item.legend-goal::before { background: var(--bad, #dc2626); border: 1px dashed var(--bad, #dc2626); background: transparent; }

/* Content sections */
.calc-content { margin-bottom: 2.5rem; }
.calc-content-section { margin-bottom: 2rem; }
.calc-content-section h2 { font-size: 1.4rem; font-weight: 700; color: var(--fg); margin: 0 0 0.75rem; letter-spacing: -0.01em; }
.calc-content-section p { font-size: 1rem; line-height: 1.7; color: var(--fg-soft); margin: 0 0 1rem; }

/* FAQ accordion */
.calc-faq { margin-bottom: 2.5rem; }
.calc-faq h2 { font-size: 1.4rem; font-weight: 700; color: var(--fg); margin: 0 0 1rem; }
.calc-faq-item { border-bottom: 1px solid var(--line); }
.calc-faq-item:first-child { border-top: 1px solid var(--line); }
.calc-faq-item summary { display: flex; align-items: center; justify-content: space-between; padding: 1rem 0; font-size: 1rem; font-weight: 500; color: var(--fg); cursor: pointer; list-style: none; }
.calc-faq-item summary::-webkit-details-marker { display: none; }
.calc-faq-item summary::after { content: '+'; font-size: 1.25rem; font-weight: 300; color: var(--muted); transition: transform 0.2s; }
.calc-faq-item[open] summary::after { content: '\2212'; }
.calc-faq-item .faq-answer { padding: 0 0 1rem; font-size: 0.95rem; line-height: 1.7; color: var(--fg-soft); }

/* Cross-links grid */
.calc-crosslinks { margin-top: 3rem; padding-top: 2rem; border-top: 1px solid var(--line); }
.calc-crosslinks h2 { font-size: 1.2rem; font-weight: 700; color: var(--fg); margin: 0 0 1rem; }
.calc-crosslinks-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: 0.75rem; }
.calc-crosslink { display: block; padding: 0.75rem 1rem; border: 1px solid var(--line); border-radius: var(--radius-sm, 8px); text-decoration: none; color: var(--fg); font-size: 0.9rem; font-weight: 500; transition: border-color 0.15s, background 0.15s; }
.calc-crosslink:hover { border-color: var(--accent); background: var(--bg-soft, #fafafa); }

/* Index page */
.calc-index-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 1rem; margin-bottom: 2.5rem; }
.calc-index-card { display: flex; flex-direction: column; padding: 1.25rem; border: 1px solid var(--line); border-radius: var(--radius, 12px); text-decoration: none; color: var(--fg); transition: border-color 0.15s, box-shadow 0.15s; }
.calc-index-card:hover { border-color: var(--accent); box-shadow: var(--shadow-sm, 0 1px 3px rgba(0,0,0,0.04)); }
.calc-index-card h3 { font-size: 1rem; font-weight: 600; margin: 0 0 0.4rem; color: var(--fg); }
.calc-index-card p { font-size: 0.85rem; line-height: 1.5; color: var(--muted); margin: 0; }

.calc-category-title { font-size: 0.78rem; font-family: var(--font-mono, 'JetBrains Mono', monospace); text-transform: uppercase; letter-spacing: 0.08em; color: var(--muted); margin: 2rem 0 0.75rem; }
.calc-category-title:first-child { margin-top: 0; }