/* ==========================================================================
   Calculator Hub — global design system
   Premium colourful calculator platform: deep purple/violet gradients,
   soft lavender sections, white calculator cards, colourful accents.
   ========================================================================== */

:root {
  --purple: #6D28D9;
  --purple-deep: #4C1D95;
  --violet: #8B5CF6;
  --lavender: #EDE9FE;
  --pink: #EC4899;
  --cyan: #06B6D4;
  --green: #10B981;
  --amber: #F59E0B;

  --ink: #1E1B2E;
  --ink-soft: #4B4560;
  --ink-faint: #7C7690;
  --line: #E6E1F5;
  --white: #FFFFFF;
  --bg: #FAF9FF;

  --radius-sm: 10px;
  --radius: 16px;
  --radius-lg: 24px;
  --shadow-sm: 0 2px 8px rgba(76, 29, 149, 0.06);
  --shadow: 0 8px 24px rgba(76, 29, 149, 0.10);
  --shadow-lg: 0 20px 48px rgba(76, 29, 149, 0.16);

  --font-display: 'Manrope', 'Inter', system-ui, sans-serif;
  --font-body: 'Inter', system-ui, sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font-body);
  color: var(--ink);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  line-height: 1.6;
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--purple); text-decoration: none; }
a:hover { color: var(--purple-deep); }
h1, h2, h3, h4 { font-family: var(--font-display); color: var(--ink); line-height: 1.25; margin: 0 0 .5em; }
h1 { font-size: clamp(1.8rem, 3.4vw, 2.6rem); font-weight: 800; }
h2 { font-size: clamp(1.35rem, 2.4vw, 1.75rem); font-weight: 800; }
h3 { font-size: 1.1rem; font-weight: 700; }
p { margin: 0 0 1em; color: var(--ink-soft); }
code { background: var(--lavender); padding: .15em .4em; border-radius: 6px; font-size: .92em; }
.shell { width: 100%; max-width: 1180px; margin: 0 auto; padding: 0 20px; }
.icon { width: 22px; height: 22px; }
.icon-sm { width: 16px; height: 16px; }
.skip-link { position: absolute; left: -999px; top: 0; background: var(--purple); color: #fff; padding: 10px 16px; z-index: 999; border-radius: 0 0 8px 0; }
.skip-link:focus { left: 0; }

/* ---- Buttons ---- */
.btn { display: inline-flex; align-items: center; gap: 8px; padding: 12px 22px; border-radius: 999px; font-weight: 700; font-size: .95rem; border: 2px solid transparent; cursor: pointer; transition: transform .15s ease, box-shadow .15s ease, background .15s ease; }
.btn-primary { background: linear-gradient(135deg, var(--purple), var(--violet)); color: #fff; box-shadow: var(--shadow-sm); }
.btn-primary:hover { transform: translateY(-1px); box-shadow: var(--shadow); color: #fff; }
.btn-ghost { background: #fff; color: var(--purple); border-color: var(--line); }
.btn-ghost:hover { border-color: var(--violet); color: var(--purple-deep); }
.btn-sm { padding: 8px 16px; font-size: .85rem; }
.btn-icon { display: inline-flex; align-items: center; gap: 6px; background: var(--lavender); color: var(--purple-deep); border: none; padding: 8px 14px; border-radius: 999px; font-size: .85rem; font-weight: 600; cursor: pointer; }
.btn-icon:hover { background: #ddd6fc; }

/* ---- Header ---- */
.site-header { background: #fff; border-bottom: 1px solid var(--line); position: sticky; top: 0; z-index: 50; }
.header-inner { display: flex; align-items: center; gap: 24px; height: 72px; }
.brand { display: flex; align-items: center; gap: 10px; font-family: var(--font-display); font-weight: 800; font-size: 1.15rem; color: var(--ink); flex-shrink: 0; }
.brand-icon { width: 30px; height: 30px; color: var(--purple); }
.main-nav { display: flex; gap: 22px; flex: 1; }
.main-nav a { color: var(--ink-soft); font-weight: 600; font-size: .93rem; white-space: nowrap; }
.main-nav a:hover { color: var(--purple); }
.header-search { display: flex; align-items: center; gap: 8px; background: var(--bg); border: 1px solid var(--line); border-radius: 999px; padding: 8px 16px; width: 260px; }
.header-search .icon-sm { color: var(--ink-faint); flex-shrink: 0; }
.header-search input { border: none; background: none; outline: none; width: 100%; font-size: .9rem; color: var(--ink); }
.nav-toggle { display: none; background: none; border: none; cursor: pointer; color: var(--ink); }
.mobile-nav { display: none; flex-direction: column; gap: 4px; padding: 12px 20px 20px; background: #fff; border-bottom: 1px solid var(--line); }
.mobile-nav a { padding: 10px 4px; color: var(--ink-soft); font-weight: 600; border-bottom: 1px solid var(--line); }
.mobile-nav .header-search { width: 100%; margin-bottom: 8px; }

@media (max-width: 900px) {
  .main-nav, .header-inner .header-search { display: none; }
  .nav-toggle { display: block; }
  .mobile-nav.is-open { display: flex; }
}

/* ---- Hero ---- */
.hero { background: radial-gradient(120% 160% at 15% 0%, var(--violet) 0%, var(--purple) 45%, var(--purple-deep) 100%); padding: 72px 0 90px; color: #fff; position: relative; overflow: hidden; }
.hero::after { content: ''; position: absolute; inset: 0; background: radial-gradient(circle at 85% 20%, rgba(236,72,153,.35), transparent 55%); pointer-events: none; }
.hero-inner { position: relative; text-align: center; max-width: 780px; }
.eyebrow { display: inline-block; background: rgba(255,255,255,.14); border: 1px solid rgba(255,255,255,.25); padding: 6px 16px; border-radius: 999px; font-size: .8rem; font-weight: 700; letter-spacing: .02em; margin-bottom: 18px; }
.hero h1 { color: #fff; margin-bottom: .4em; }
.hero-lede { color: rgba(255,255,255,.88); font-size: 1.1rem; max-width: 620px; margin: 0 auto 28px; }
.hero-search { display: flex; align-items: center; gap: 10px; background: #fff; border-radius: 999px; padding: 8px 8px 8px 20px; max-width: 560px; margin: 0 auto; box-shadow: var(--shadow-lg); }
.hero-search .icon { color: var(--ink-faint); flex-shrink: 0; }
.hero-search input { flex: 1; border: none; outline: none; font-size: 1rem; padding: 10px 0; color: var(--ink); }
.hero-search-inline { margin: 20px 0; max-width: 480px; }
.hero-chips { display: flex; flex-wrap: wrap; gap: 10px; justify-content: center; margin-top: 26px; }
.hero-chip { display: inline-flex; align-items: center; gap: 6px; background: rgba(255,255,255,.14); border: 1px solid rgba(255,255,255,.3); color: #fff; padding: 8px 16px; border-radius: 999px; font-size: .85rem; font-weight: 600; }
.hero-chip:hover { background: rgba(255,255,255,.24); color: #fff; }

/* ---- Home sections ---- */
.home-section { padding: 52px 0; }
.section-head { display: flex; align-items: flex-end; justify-content: space-between; gap: 20px; margin-bottom: 24px; flex-wrap: wrap; }
.section-head p { margin: 4px 0 0; max-width: 560px; }
.section-link { font-weight: 700; display: inline-flex; align-items: center; gap: 4px; white-space: nowrap; }

.home-trust { padding: 20px 0 60px; }
.trust-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.trust-card { background: var(--lavender); border-radius: var(--radius); padding: 26px; }
.trust-card .icon { color: var(--purple); margin-bottom: 10px; }
.trust-card h3 { margin-bottom: 6px; }
.trust-card p { margin: 0; font-size: .92rem; }
@media (max-width: 760px) { .trust-grid { grid-template-columns: 1fr; } }

/* ---- Tool cards ---- */
.tool-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
@media (max-width: 1080px) { .tool-grid { grid-template-columns: repeat(3, 1fr); } }
@media (max-width: 800px) { .tool-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 540px) { .tool-grid { grid-template-columns: 1fr; } }

.tool-card { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 22px; display: flex; flex-direction: column; gap: 8px; box-shadow: var(--shadow-sm); transition: transform .18s ease, box-shadow .18s ease; height: 100%; }
.tool-card:hover { transform: translateY(-4px); box-shadow: var(--shadow); }
.tool-card-top { display: flex; align-items: center; justify-content: space-between; }
.tool-icon { display: inline-flex; align-items: center; justify-content: center; width: 46px; height: 46px; border-radius: 14px; background: linear-gradient(135deg, var(--lavender), #fff); color: var(--purple); }
.tool-icon .icon { width: 24px; height: 24px; }
.badge { font-size: .7rem; font-weight: 800; padding: 4px 10px; border-radius: 999px; text-transform: uppercase; letter-spacing: .03em; }
.badge-popular { background: linear-gradient(135deg, var(--amber), #fbbf24); color: #78350f; }
.tool-badge { display: inline-flex; align-items: center; gap: 6px; font-size: .72rem; font-weight: 700; color: var(--purple); background: var(--lavender); padding: 4px 10px; border-radius: 999px; width: fit-content; text-transform: uppercase; letter-spacing: .02em; }
.tool-card h3 { font-size: 1.05rem; margin: 4px 0 0; }
.tool-card h3 a { color: var(--ink); }
.tool-card h3 a:hover { color: var(--purple); }
.tool-card p { font-size: .9rem; margin: 0; flex: 1; }
.tool-cta { margin-top: 8px; font-weight: 700; font-size: .88rem; display: inline-flex; align-items: center; gap: 6px; color: var(--purple); }
.tool-card:hover .tool-cta { color: var(--purple-deep); }

.cat-badge-violet { color: var(--purple); background: var(--lavender); }
.cat-badge-pink { color: #9d174d; background: #fce7f3; }
.cat-badge-green { color: #065f46; background: #d1fae5; }
.cat-badge-cyan { color: #155e75; background: #cffafe; }
.cat-badge-amber { color: #92400e; background: #fef3c7; }
.cat-badge-purple { color: var(--purple-deep); background: var(--lavender); }

/* ---- Breadcrumbs ---- */
.breadcrumbs { padding: 20px 0 6px; }
.breadcrumbs ol { list-style: none; display: flex; flex-wrap: wrap; gap: 6px; padding: 0; margin: 0; font-size: .85rem; }
.breadcrumbs li:not(:last-child)::after { content: '/'; margin-left: 6px; color: var(--ink-faint); }
.breadcrumbs a { color: var(--ink-faint); font-weight: 600; }
.breadcrumbs a:hover { color: var(--purple); }
.breadcrumbs span[aria-current] { color: var(--ink-soft); font-weight: 600; }

/* ---- Tool page ---- */
.page-tool { padding-bottom: 60px; }
.tool-header { padding: 8px 0 20px; }
.tool-lede { font-size: 1.05rem; max-width: 700px; }
.direct-answer { background: var(--lavender); border-radius: var(--radius); padding: 22px 26px; margin: 20px 0; }
.direct-answer h2 { font-size: 1.05rem; color: var(--purple-deep); margin-bottom: 6px; }
.direct-answer p { margin: 0; color: var(--ink); }

.calculator-card { background: #fff; border: 1px solid var(--line); border-radius: var(--radius-lg); padding: 30px; box-shadow: var(--shadow); margin: 26px 0; }
.calc-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 18px; margin-bottom: 18px; }
@media (max-width: 640px) { .calc-grid { grid-template-columns: 1fr; } }
.field { display: flex; flex-direction: column; gap: 6px; }
.field label { font-weight: 700; font-size: .88rem; color: var(--ink); }
.field input[type="number"], .field input[type="text"], .field input[type="date"], .field select {
  border: 1.5px solid var(--line); border-radius: var(--radius-sm); padding: 11px 14px; font-size: .95rem; font-family: var(--font-body); color: var(--ink); background: #fff;
}
.field input:focus, .field select:focus { outline: none; border-color: var(--violet); box-shadow: 0 0 0 3px rgba(139,92,246,.18); }
.field input[type="range"] { accent-color: var(--purple); }
.field output { font-weight: 700; color: var(--purple); font-size: .85rem; }
.field-hint { font-size: .8rem; color: var(--ink-faint); margin: 2px 0 0; }
.calc-rate-note { margin-top: 14px; }

.radio-group { border: none; padding: 0; margin: 0 0 18px; display: flex; flex-wrap: wrap; gap: 18px; align-items: center; }
.radio-group legend { font-weight: 700; font-size: .88rem; width: 100%; margin-bottom: 6px; }
.radio-group label { display: inline-flex; align-items: center; gap: 6px; font-size: .92rem; color: var(--ink-soft); cursor: pointer; }
.radio-group input[type="radio"] { accent-color: var(--purple); width: 17px; height: 17px; }

.xirr-rows { display: flex; flex-direction: column; gap: 10px; margin-bottom: 12px; }
.xirr-row { display: grid; grid-template-columns: 1fr 1fr auto; gap: 10px; align-items: center; }
.xirr-row input { border: 1.5px solid var(--line); border-radius: var(--radius-sm); padding: 10px 12px; font-size: .9rem; }
.btn-remove-row { background: #fee2e2; color: #b91c1c; border: none; border-radius: 8px; width: 34px; height: 34px; font-size: 1.1rem; cursor: pointer; }

.calc-actions { display: flex; gap: 12px; margin: 6px 0 4px; }
.calc-missing { color: var(--ink-faint); font-style: italic; }

.calc-result { margin-top: 26px; padding-top: 24px; border-top: 2px dashed var(--line); }
.result-row { display: flex; align-items: center; justify-content: space-between; padding: 10px 0; border-bottom: 1px solid var(--line); font-size: .95rem; }
.result-row span { color: var(--ink-soft); }
.result-row strong { color: var(--ink); font-weight: 700; }
.result-row-emphasis { font-size: 1.15rem; }
.result-row-emphasis strong { color: var(--purple-deep); font-weight: 800; }
.result-highlight { background: var(--lavender); color: var(--purple-deep); border-radius: var(--radius-sm); padding: 14px 18px; font-weight: 600; font-size: .92rem; margin-bottom: 14px; }
.result-warning { background: #fef3c7; color: #92400e; }
.result-compare { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin-bottom: 16px; }
.result-compare-col { background: var(--bg); border-radius: var(--radius-sm); padding: 16px; }
.result-compare-col h4 { margin: 0 0 8px; font-size: .9rem; color: var(--purple-deep); }
@media (max-width: 640px) { .result-compare { grid-template-columns: 1fr; } }

.calc-result-actions { display: flex; gap: 10px; margin-top: 18px; }

.table-wrap { overflow-x: auto; margin: 16px 0; border: 1px solid var(--line); border-radius: var(--radius-sm); }
.calc-table { width: 100%; border-collapse: collapse; font-size: .88rem; min-width: 420px; }
.calc-table th { background: var(--lavender); color: var(--purple-deep); text-align: left; padding: 10px 14px; font-weight: 700; white-space: nowrap; }
.calc-table td { padding: 9px 14px; border-top: 1px solid var(--line); color: var(--ink-soft); white-space: nowrap; }
.table-note { font-size: .8rem; color: var(--ink-faint); }

.mini-chart { display: flex; align-items: flex-end; gap: 6px; height: 140px; margin: 18px 0; padding: 10px 4px 0; border-bottom: 2px solid var(--line); overflow-x: auto; }
.mini-chart-col { display: flex; flex-direction: column; align-items: center; justify-content: flex-end; height: 100%; flex: 1; min-width: 22px; gap: 6px; }
.mini-chart-bar { width: 70%; min-width: 10px; border-radius: 6px 6px 0 0; background: linear-gradient(180deg, var(--violet), var(--purple)); }
.mini-chart-col span { font-size: .68rem; color: var(--ink-faint); white-space: nowrap; }

.tool-content section { margin: 34px 0; }
.tool-content h2 { color: var(--purple-deep); }
.tool-references a { word-break: break-word; }

.related-tools { margin: 40px 0; }
.related-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 12px; }
.related-chip { display: flex; align-items: center; gap: 10px; background: #fff; border: 1px solid var(--line); border-radius: var(--radius-sm); padding: 12px 16px; font-weight: 600; font-size: .9rem; color: var(--ink); }
.related-chip:hover { border-color: var(--violet); color: var(--purple); }
.related-chip .icon-sm { color: var(--purple); flex-shrink: 0; }

.faq-section { margin: 40px 0; }
.faq-list { display: flex; flex-direction: column; gap: 10px; }
.faq-item { background: #fff; border: 1px solid var(--line); border-radius: var(--radius-sm); padding: 4px 18px; }
.faq-item summary { cursor: pointer; padding: 14px 0; font-weight: 700; color: var(--ink); list-style: none; display: flex; justify-content: space-between; align-items: center; }
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after { content: '+'; font-size: 1.3rem; color: var(--purple); font-weight: 400; }
.faq-item[open] summary::after { content: '−'; }
.faq-answer { padding: 0 0 16px; color: var(--ink-soft); font-size: .92rem; }

.tool-disclaimer { background: var(--bg); border: 1px solid var(--line); border-radius: var(--radius-sm); padding: 18px 22px; margin: 30px 0; font-size: .86rem; }
.tool-disclaimer p { margin: 0 0 6px; }
.meta-line { font-size: .82rem; color: var(--ink-faint); margin: 0; }

/* ---- Ads ---- */
.ad-slot { margin: 22px auto; text-align: center; max-width: 100%; overflow: hidden; }

/* ---- Category page ---- */
.category-header { padding: 8px 0 12px; }
.category-intro { max-width: 780px; margin-bottom: 30px; }

/* ---- Static pages ---- */
.static-content { max-width: 760px; margin: 20px auto 60px; background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 36px; }
.static-content h2 { margin-top: 1.6em; color: var(--purple-deep); }

/* ---- Blog ---- */
.page-blog, .page-blog-post { padding-bottom: 60px; }
.blog-cat-pills { display: flex; flex-wrap: wrap; gap: 8px; margin: 20px 0 30px; }
.pill { font-size: .82rem; font-weight: 700; padding: 8px 16px; border-radius: 999px; background: #fff; border: 1px solid var(--line); color: var(--ink-soft); }
.pill:hover, .pill-on { background: var(--purple); color: #fff; border-color: var(--purple); }
.blog-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
@media (max-width: 900px) { .blog-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 620px) { .blog-grid { grid-template-columns: 1fr; } }
.blog-card { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow-sm); display: flex; flex-direction: column; }
.blog-card img { aspect-ratio: 16/9; object-fit: cover; }
.blog-card > *:not(img) { padding-left: 20px; padding-right: 20px; }
.blog-card .tool-badge { margin-top: 16px; }
.blog-card h2 { font-size: 1.05rem; margin: 8px 0 6px; }
.blog-card h2 a { color: var(--ink); }
.blog-card p { font-size: .88rem; flex: 1; }
.blog-card .tool-cta { margin-bottom: 18px; }
.pagination { display: flex; gap: 8px; justify-content: center; margin-top: 40px; }
.pagination a { width: 38px; height: 38px; display: flex; align-items: center; justify-content: center; border-radius: 10px; border: 1px solid var(--line); font-weight: 700; color: var(--ink-soft); }
.pagination a.active { background: var(--purple); color: #fff; border-color: var(--purple); }

.blog-post { max-width: 760px; margin: 0 auto; background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 36px; }
.blog-post-header h1 { margin: 8px 0 6px; }
.blog-post-image { border-radius: var(--radius-sm); margin: 18px 0; }
.blog-post-content h2 { color: var(--purple-deep); margin-top: 1.6em; }

/* ---- FAQ page ---- */
.page-faq { padding-bottom: 60px; }

/* ---- Search ---- */
.page-search { padding-bottom: 60px; }
.result-count { color: var(--ink-faint); margin-bottom: 20px; }

/* ---- 404 ---- */
.page-404 { text-align: center; padding: 60px 0; }
.error-404 { max-width: 480px; margin: 0 auto 50px; }
.error-code { font-family: var(--font-display); font-size: 5rem; font-weight: 800; background: linear-gradient(135deg, var(--purple), var(--pink)); -webkit-background-clip: text; background-clip: text; color: transparent; }
.error-404 .hero-search-inline { background: #fff; border: 1px solid var(--line); box-shadow: none; }
.error-404 .btn-ghost { margin-top: 14px; }

/* ---- Footer ---- */
.site-footer { background: var(--purple-deep); color: rgba(255,255,255,.86); margin-top: 60px; }
.footer-grid { display: grid; grid-template-columns: 1.6fr 1fr 1fr 1fr; gap: 30px; padding: 52px 0 30px; }
.footer-brand p { color: rgba(255,255,255,.7); font-size: .88rem; margin-top: 10px; }
.footer-brand .brand { color: #fff; }
.footer-brand .brand-icon { color: var(--violet); }
.footer-col h3 { color: #fff; font-size: .82rem; text-transform: uppercase; letter-spacing: .05em; margin-bottom: 14px; }
.footer-col a { display: block; color: rgba(255,255,255,.72); font-size: .9rem; padding: 5px 0; }
.footer-col a:hover { color: #fff; }
.footer-bottom { border-top: 1px solid rgba(255,255,255,.15); padding: 22px 0 30px; font-size: .8rem; color: rgba(255,255,255,.6); }
.footer-disclaimer { max-width: 900px; margin-bottom: 10px; }
@media (max-width: 800px) { .footer-grid { grid-template-columns: 1fr 1fr; } }
@media (max-width: 520px) { .footer-grid { grid-template-columns: 1fr; } }

@media print {
  .site-header, .site-footer, .ad-slot, .calc-actions, .calc-result-actions, .hero, .related-tools, .nav-toggle { display: none !important; }
}