/* ==========================================================================
   Compound Interest Calculator — Stylesheet
   Modern minimal style inspired by Stripe / Notion
   ========================================================================== */

:root {
  --primary: #4f46e5;
  --primary-600: #4338ca;
  --primary-50: #eef2ff;
  --accent: #7c3aed;
  --gain: #10b981;

  --bg: #f8fafc;
  --surface: #ffffff;
  --surface-2: #f1f5f9;
  --border: #e2e8f0;
  --text: #0f172a;
  --text-soft: #475569;
  --text-muted: #64748b;

  --shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.04), 0 1px 3px rgba(15, 23, 42, 0.06);
  --shadow-md: 0 4px 6px -1px rgba(15, 23, 42, 0.06), 0 10px 24px -8px rgba(15, 23, 42, 0.08);
  --shadow-lg: 0 20px 40px -12px rgba(79, 70, 229, 0.18);

  --radius: 14px;
  --radius-sm: 10px;
  --radius-lg: 20px;

  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

[data-theme="dark"] {
  --bg: #0b1020;
  --surface: #131a2e;
  --surface-2: #1a2238;
  --border: #243049;
  --text: #e2e8f0;
  --text-soft: #cbd5e1;
  --text-muted: #94a3b8;
  --primary-50: #1e1b4b;
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.4);
  --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 20px 40px -12px rgba(0, 0, 0, 0.6);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font);
  color: var(--text);
  background: var(--bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  transition: background-color .3s ease, color .3s ease;
}

a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }

.container {
  width: 100%;
  max-width: 1180px;
  margin: 0 auto;
  padding: 0 24px;
}
.container.narrow { max-width: 820px; }

/* ============ HEADER ============ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255,255,255,0.85);
  backdrop-filter: saturate(180%) blur(12px);
  -webkit-backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--border);
}
[data-theme="dark"] .site-header { background: rgba(11, 16, 32, 0.8); }

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  color: var(--text);
  font-size: 18px;
}
.brand:hover { text-decoration: none; }
.brand-mark {
  width: 32px; height: 32px;
  display: inline-flex; align-items: center; justify-content: center;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  color: #fff; border-radius: 8px; font-weight: 800;
  box-shadow: var(--shadow-sm);
}
.brand-mark.small { width: 22px; height: 22px; font-size: 12px; border-radius: 6px; }
.brand-name span { color: var(--primary); }

.site-nav {
  display: flex; gap: 28px;
  align-items: center;
}
.site-nav a {
  color: var(--text-soft); font-weight: 500; font-size: 15px;
  transition: color .2s;
}
.site-nav a:hover { color: var(--primary); text-decoration: none; }
.site-nav a[aria-current="page"] { color: var(--primary); }

/* dropdown */
.nav-dropdown { position: relative; }
.nav-dropdown-toggle {
  display: inline-flex; align-items: center; gap: 4px;
  background: none; border: none;
  font: inherit; font-weight: 500; font-size: 15px;
  color: var(--text-soft);
  cursor: pointer; padding: 0;
  transition: color .2s;
}
.nav-dropdown-toggle:hover,
.nav-dropdown[data-open="true"] .nav-dropdown-toggle { color: var(--primary); }
.nav-dropdown-toggle svg {
  width: 14px; height: 14px;
  transition: transform .2s;
}
.nav-dropdown[data-open="true"] .nav-dropdown-toggle svg { transform: rotate(180deg); }

.nav-dropdown-menu {
  position: absolute;
  top: calc(100% + 12px);
  left: 50%;
  transform: translateX(-50%) translateY(-4px);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-md);
  min-width: 280px;
  padding: 8px;
  opacity: 0;
  visibility: hidden;
  transition: opacity .15s ease, transform .15s ease, visibility .15s;
  z-index: 60;
}
.nav-dropdown[data-open="true"] .nav-dropdown-menu {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(0);
}
.nav-dropdown-menu a {
  display: block;
  padding: 10px 12px;
  border-radius: var(--radius-sm);
  color: var(--text);
  font-size: 14px;
}
.nav-dropdown-menu a:hover {
  background: var(--surface-2);
  color: var(--primary);
  text-decoration: none;
}
.nav-dropdown-menu a strong {
  display: block;
  font-weight: 600;
  margin-bottom: 2px;
}
.nav-dropdown-menu a span {
  font-size: 12.5px;
  color: var(--text-muted);
  font-weight: 400;
}

.icon-btn {
  background: var(--surface-2);
  border: 1px solid var(--border);
  color: var(--text-soft);
  width: 40px; height: 40px;
  border-radius: 10px;
  display: inline-flex; align-items: center; justify-content: center;
  cursor: pointer;
  transition: all .2s;
}
.icon-btn:hover { color: var(--primary); border-color: var(--primary); }

/* ============ HERO ============ */
.hero {
  padding: 56px 0 48px;
  background:
    radial-gradient(ellipse at top left, rgba(79, 70, 229, 0.08), transparent 50%),
    radial-gradient(ellipse at top right, rgba(124, 58, 237, 0.08), transparent 50%);
}
[data-theme="dark"] .hero {
  background:
    radial-gradient(ellipse at top left, rgba(79, 70, 229, 0.18), transparent 50%),
    radial-gradient(ellipse at top right, rgba(124, 58, 237, 0.18), transparent 50%);
}

.hero-text {
  text-align: center;
  margin-bottom: 40px;
}
.hero h1 {
  font-size: clamp(32px, 5vw, 48px);
  margin: 0 0 12px;
  font-weight: 800;
  letter-spacing: -0.02em;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.lede {
  font-size: 18px;
  color: var(--text-soft);
  margin: 0 auto;
  max-width: 640px;
}

/* ============ CALC GRID ============ */
.calc-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.25fr);
  gap: 24px;
  align-items: start;
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px;
  box-shadow: var(--shadow-md);
}

.card-title {
  margin: 0 0 20px;
  font-size: 18px;
  font-weight: 700;
  letter-spacing: -0.01em;
}

/* ============ FIELDS ============ */
.field { margin-bottom: 20px; }
.field:last-child { margin-bottom: 0; }

.field label {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 14px;
  font-weight: 600;
  color: var(--text-soft);
  margin-bottom: 8px;
}

.value-badge {
  background: var(--primary-50);
  color: var(--primary);
  padding: 2px 10px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 700;
}

input[type="number"],
select {
  width: 100%;
  border: 1.5px solid var(--border);
  background: var(--surface);
  color: var(--text);
  padding: 12px 14px;
  border-radius: var(--radius-sm);
  font-size: 15px;
  font-family: inherit;
  transition: border-color .15s, box-shadow .15s;
  outline: none;
}
input[type="number"]:focus,
select:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 4px rgba(79, 70, 229, 0.12);
}

select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='14' height='14' viewBox='0 0 24 24' fill='none' stroke='%2364748b' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 14px center;
  padding-right: 40px;
}

.input-affix {
  display: flex; align-items: center;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--surface);
  transition: border-color .15s, box-shadow .15s;
}
.input-affix:focus-within {
  border-color: var(--primary);
  box-shadow: 0 0 0 4px rgba(79, 70, 229, 0.12);
}
.input-affix .affix {
  padding: 0 14px;
  color: var(--text-muted);
  font-weight: 600;
  border-right: 1px solid var(--border);
}
.input-affix input {
  border: none !important;
  box-shadow: none !important;
  background: transparent;
}

/* range slider */
input[type="range"] {
  width: 100%;
  -webkit-appearance: none;
  appearance: none;
  height: 6px;
  background: var(--surface-2);
  border-radius: 999px;
  outline: none;
  margin: 6px 0 8px;
}
input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 20px; height: 20px;
  background: var(--primary);
  border-radius: 50%;
  border: 3px solid var(--surface);
  box-shadow: var(--shadow-sm);
  cursor: pointer;
  transition: transform .15s;
}
input[type="range"]::-webkit-slider-thumb:hover { transform: scale(1.15); }
input[type="range"]::-moz-range-thumb {
  width: 20px; height: 20px;
  background: var(--primary);
  border-radius: 50%;
  border: 3px solid var(--surface);
  cursor: pointer;
}

/* ============ BUTTONS ============ */
.actions-row {
  display: flex;
  gap: 10px;
  margin-top: 24px;
  flex-wrap: wrap;
}
.btn {
  flex: 1;
  min-width: 100px;
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 600;
  font-family: inherit;
  border: 1.5px solid transparent;
  cursor: pointer;
  transition: all .2s;
}
.btn-primary {
  background: linear-gradient(135deg, var(--primary), var(--accent));
  color: #fff;
  box-shadow: 0 4px 12px rgba(79, 70, 229, 0.25);
}
.btn-primary:hover { transform: translateY(-1px); box-shadow: 0 6px 18px rgba(79, 70, 229, 0.35); }
.btn-secondary {
  background: var(--primary-50);
  color: var(--primary);
}
.btn-secondary:hover { background: var(--primary); color: #fff; }
.btn-ghost {
  background: transparent;
  color: var(--text-soft);
  border-color: var(--border);
}
.btn-ghost:hover { border-color: var(--primary); color: var(--primary); }

/* ============ RESULTS ============ */
.result-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin-bottom: 24px;
}
.result-item {
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 16px;
}
.result-item.highlight {
  background: linear-gradient(135deg, rgba(79, 70, 229, 0.08), rgba(124, 58, 237, 0.08));
  border-color: rgba(79, 70, 229, 0.25);
}
.result-label {
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
  margin-bottom: 6px;
  font-weight: 600;
}
.result-value {
  font-size: 24px;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--text);
  font-variant-numeric: tabular-nums;
}
.result-value.gain { color: var(--gain); }
.result-item.highlight .result-value {
  background: linear-gradient(135deg, var(--primary), var(--accent));
  -webkit-background-clip: text; background-clip: text;
  color: transparent;
}

.chart-wrap {
  position: relative;
  height: 320px;
  width: 100%;
}

.legend-row {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
  margin-top: 14px;
  font-size: 13px;
  color: var(--text-muted);
}
.legend-dot {
  width: 10px; height: 10px;
  border-radius: 50%;
  display: inline-block;
}
.legend-dot.legend-contrib { background: #94a3b8; }
.legend-dot.legend-interest { background: var(--primary); }
.legend-row span + span { margin-right: 10px; }

/* ============ TOAST ============ */
.toast {
  position: fixed;
  bottom: 32px; left: 50%;
  transform: translateX(-50%) translateY(20px);
  background: var(--text);
  color: var(--bg);
  padding: 12px 20px;
  border-radius: 999px;
  font-size: 14px;
  font-weight: 500;
  box-shadow: var(--shadow-lg);
  opacity: 0;
  pointer-events: none;
  transition: all .3s ease;
  z-index: 100;
}
.toast.show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

/* ============ SHARE MODAL ============ */
.modal {
  position: fixed; inset: 0;
  z-index: 200;
  display: flex; align-items: center; justify-content: center;
  padding: 20px;
  animation: fadeIn .18s ease;
}
.modal[hidden] { display: none; }
.modal-backdrop {
  position: absolute; inset: 0;
  background: rgba(15, 23, 42, 0.55);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
}
.modal-card {
  position: relative;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  padding: 28px;
  width: 100%;
  max-width: 460px;
  animation: popIn .2s ease;
}
.modal-close {
  position: absolute; top: 14px; right: 14px;
  width: 32px; height: 32px;
  border-radius: 8px;
  background: transparent;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  display: inline-flex; align-items: center; justify-content: center;
  transition: background .15s, color .15s;
}
.modal-close:hover { background: var(--surface-2); color: var(--text); }
.modal-title {
  margin: 0 0 6px;
  font-size: 20px;
  font-weight: 700;
  letter-spacing: -0.01em;
}
.modal-sub {
  margin: 0 0 20px;
  font-size: 14px;
  color: var(--text-muted);
}
.share-url-row {
  display: flex;
  gap: 8px;
  margin-bottom: 20px;
}
.share-url-row input {
  flex: 1;
  padding: 11px 14px;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--surface-2);
  color: var(--text);
  font-size: 13px;
  font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  outline: none;
}
.share-url-row input:focus { border-color: var(--primary); }
.share-url-row .btn {
  flex: 0 0 auto;
  min-width: 86px;
}
.share-social {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}
.social-btn {
  flex: 1;
  min-width: 100px;
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  background: var(--surface-2);
  color: var(--text-soft);
  border: 1px solid var(--border);
  font-size: 13px;
  font-weight: 600;
  text-decoration: none;
  transition: all .15s;
}
.social-btn:hover {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
  text-decoration: none;
  transform: translateY(-1px);
}

@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }
@keyframes popIn  { from { opacity: 0; transform: translateY(8px) scale(.98); } to { opacity: 1; transform: translateY(0) scale(1); } }

body.modal-open { overflow: hidden; }

/* ============ SEO CONTENT ============ */
.content-section {
  padding: 64px 0;
  background: var(--surface);
  border-top: 1px solid var(--border);
}
.prose h2 {
  font-size: 28px;
  margin: 0 0 16px;
  letter-spacing: -0.02em;
}
.prose h3 {
  font-size: 20px;
  margin: 32px 0 12px;
  letter-spacing: -0.01em;
}
.prose p, .prose ul {
  color: var(--text-soft);
  font-size: 16px;
}
.prose ul { padding-left: 22px; }
.prose li { margin-bottom: 8px; }
.formula {
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 14px 18px;
  font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  font-size: 16px;
  text-align: center;
  color: var(--text);
}

/* ============ FAQ ============ */
.faq { margin-top: 56px; }
.faq h2 {
  font-size: 28px;
  letter-spacing: -0.02em;
  margin: 0 0 20px;
}
.faq details {
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 16px 20px;
  margin-bottom: 12px;
  transition: background .2s;
}
.faq details[open] { background: var(--primary-50); border-color: var(--primary); }
.faq summary {
  cursor: pointer;
  font-weight: 600;
  color: var(--text);
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after {
  content: "+";
  font-size: 22px;
  color: var(--primary);
  font-weight: 400;
  transition: transform .2s;
}
.faq details[open] summary::after { content: "−"; }
.faq details p {
  margin: 12px 0 0;
  color: var(--text-soft);
  font-size: 15px;
}

/* ============ FOOTER ============ */
.site-footer {
  padding: 32px 0;
  border-top: 1px solid var(--border);
  background: var(--surface);
}
.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  font-size: 14px;
  color: var(--text-muted);
}
.footer-inner > div { display: inline-flex; align-items: center; gap: 8px; font-weight: 600; color: var(--text); }
.footer-note { margin: 0; }
.site-footer nav { display: flex; gap: 20px; }
.site-footer nav a { color: var(--text-muted); }

/* mobile nav toggle (hamburger) */
.nav-toggle {
  display: none;
  background: var(--surface-2);
  border: 1px solid var(--border);
  color: var(--text-soft);
  width: 40px; height: 40px;
  border-radius: 10px;
  align-items: center; justify-content: center;
  cursor: pointer;
}
.nav-toggle:hover { color: var(--primary); border-color: var(--primary); }

/* ============ RESPONSIVE ============ */
@media (max-width: 880px) {
  .calc-grid { grid-template-columns: 1fr; }
  .hero { padding: 40px 0 32px; }
  .card { padding: 22px; }
  .result-value { font-size: 20px; }
  .chart-wrap { height: 260px; }
  .footer-inner { justify-content: center; text-align: center; }

  .nav-toggle { display: inline-flex; }
  .site-nav {
    position: absolute;
    top: 64px; left: 0; right: 0;
    background: var(--surface);
    border-bottom: 1px solid var(--border);
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 8px;
    box-shadow: var(--shadow-md);
    transform: translateY(-8px);
    opacity: 0;
    visibility: hidden;
    transition: opacity .2s, transform .2s, visibility .2s;
  }
  .site-nav.open {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }
  .site-nav a {
    padding: 12px 16px;
    border-radius: var(--radius-sm);
  }
  .site-nav a:hover { background: var(--surface-2); }
  .nav-dropdown { width: 100%; }
  .nav-dropdown-toggle {
    width: 100%;
    justify-content: space-between;
    padding: 12px 16px;
    border-radius: var(--radius-sm);
  }
  .nav-dropdown-toggle:hover { background: var(--surface-2); }
  .nav-dropdown-menu {
    position: static;
    transform: none;
    box-shadow: none;
    border: none;
    background: var(--surface-2);
    width: 100%;
    min-width: 0;
    margin-top: 4px;
    padding: 4px;
    display: none;
  }
  .nav-dropdown[data-open="true"] .nav-dropdown-menu {
    display: block;
    transform: none;
  }
}

@media (max-width: 480px) {
  .result-grid { grid-template-columns: 1fr; }
  .actions-row .btn { flex: 1 1 100%; }
  .hero h1 { font-size: 30px; }
  .lede { font-size: 16px; }
}

/* ============ COOKIE BANNER ============ */
.cookie-banner {
  position: fixed;
  left: 16px; right: 16px; bottom: 16px;
  z-index: 150;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  padding: 16px 20px;
  opacity: 0;
  transform: translateY(20px);
  transition: opacity .25s ease, transform .25s ease;
}
.cookie-banner.show { opacity: 1; transform: translateY(0); }
.cookie-banner-inner {
  display: flex;
  gap: 18px;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  max-width: 1180px;
  margin: 0 auto;
}
.cookie-text {
  flex: 1 1 280px;
  font-size: 13.5px;
  color: var(--text-soft);
  line-height: 1.55;
}
.cookie-text strong { color: var(--text); display: block; margin-bottom: 2px; }
.cookie-actions {
  display: flex;
  gap: 8px;
  flex: 0 0 auto;
}
.cookie-actions .btn {
  flex: 0 0 auto;
  min-width: 90px;
  padding: 9px 16px;
}
@media (max-width: 540px) {
  .cookie-banner { left: 8px; right: 8px; bottom: 8px; padding: 14px; }
  .cookie-banner-inner { flex-direction: column; align-items: stretch; }
  .cookie-actions { justify-content: stretch; }
  .cookie-actions .btn { flex: 1; }
}

/* ============ COMPLIANCE PAGES (Privacy/Terms/Contact/Disclaimer) ============ */
.legal-page { padding: 56px 0 64px; }
.legal-page h1 {
  font-size: clamp(28px, 4vw, 38px);
  letter-spacing: -0.02em;
  margin: 0 0 8px;
}
.legal-page .updated {
  color: var(--text-muted);
  font-size: 14px;
  margin: 0 0 28px;
}
.legal-page h2 {
  font-size: 22px;
  margin: 32px 0 10px;
  letter-spacing: -0.01em;
}
.legal-page h3 {
  font-size: 17px;
  margin: 20px 0 8px;
}
.legal-page p, .legal-page li {
  color: var(--text-soft);
  font-size: 15.5px;
}
.legal-page ul { padding-left: 22px; }
.legal-page li { margin-bottom: 6px; }
.contact-card {
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px 24px;
  margin: 20px 0;
}
.contact-card a { font-weight: 600; }

/* ============ HUB / CARD GRID (calculators, blog index) ============ */
.hub-page { padding: 56px 0 64px; }
.hub-header { text-align: center; margin-bottom: 40px; }
.hub-header h1 {
  font-size: clamp(30px, 4.5vw, 42px);
  letter-spacing: -0.02em;
  margin: 0 0 12px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.hub-header p {
  color: var(--text-soft);
  font-size: 17px;
  max-width: 620px;
  margin: 0 auto;
}

.tile-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 20px;
}
.tile {
  display: flex;
  flex-direction: column;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 26px;
  text-decoration: none;
  color: inherit;
  box-shadow: var(--shadow-sm);
  transition: transform .2s, box-shadow .2s, border-color .2s;
}
.tile:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
  border-color: var(--primary);
  text-decoration: none;
}
.tile-icon {
  width: 44px; height: 44px;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  color: #fff;
  display: inline-flex; align-items: center; justify-content: center;
  font-weight: 800; font-size: 20px;
  margin-bottom: 16px;
  box-shadow: 0 4px 12px rgba(79, 70, 229, 0.25);
}
.tile h3 {
  margin: 0 0 8px;
  font-size: 18px;
  letter-spacing: -0.01em;
  color: var(--text);
}
.tile p {
  margin: 0;
  color: var(--text-soft);
  font-size: 14.5px;
  line-height: 1.55;
  flex: 1;
}
.tile-cta {
  margin-top: 16px;
  font-size: 14px;
  font-weight: 600;
  color: var(--primary);
  display: inline-flex; align-items: center; gap: 4px;
}
.tile:hover .tile-cta { gap: 8px; }

/* Blog post card variant */
.tile.post .tile-meta {
  font-size: 12.5px;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-weight: 600;
  margin-bottom: 8px;
}

/* ============ ARTICLE / BLOG POST ============ */
.article-page { padding: 48px 0 64px; }
.article-header {
  text-align: center;
  margin-bottom: 40px;
  padding-bottom: 32px;
  border-bottom: 1px solid var(--border);
}
.article-header .meta {
  font-size: 13px;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  font-weight: 600;
  margin-bottom: 12px;
}
.article-header h1 {
  font-size: clamp(28px, 4.5vw, 42px);
  letter-spacing: -0.02em;
  margin: 0 0 14px;
  line-height: 1.2;
}
.article-header .lede {
  color: var(--text-soft);
  font-size: 17px;
  max-width: 640px;
  margin: 0 auto;
}
.article-body {
  max-width: 720px;
  margin: 0 auto;
}
.article-body h2 {
  font-size: 26px;
  letter-spacing: -0.02em;
  margin: 40px 0 14px;
}
.article-body h3 {
  font-size: 19px;
  margin: 28px 0 10px;
}
.article-body p,
.article-body ul,
.article-body ol {
  color: var(--text-soft);
  font-size: 16.5px;
  line-height: 1.72;
}
.article-body ul, .article-body ol { padding-left: 22px; }
.article-body li { margin-bottom: 8px; }
.article-body blockquote {
  margin: 24px 0;
  padding: 14px 20px;
  background: var(--surface-2);
  border-left: 4px solid var(--primary);
  border-radius: 8px;
  font-style: italic;
  color: var(--text-soft);
}
.article-body code {
  background: var(--surface-2);
  border: 1px solid var(--border);
  padding: 1px 6px;
  border-radius: 4px;
  font-size: 0.92em;
  font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
}
.article-body table {
  width: 100%;
  border-collapse: collapse;
  margin: 20px 0;
  font-size: 15px;
}
.article-body th, .article-body td {
  padding: 10px 14px;
  border-bottom: 1px solid var(--border);
  text-align: left;
}
.article-body th { background: var(--surface-2); font-weight: 600; }
.article-cta {
  margin-top: 48px;
  padding: 24px;
  background: linear-gradient(135deg, rgba(79, 70, 229, 0.08), rgba(124, 58, 237, 0.08));
  border: 1px solid rgba(79, 70, 229, 0.25);
  border-radius: var(--radius);
  text-align: center;
}
.article-cta strong {
  display: block;
  font-size: 17px;
  color: var(--text);
  margin-bottom: 8px;
}
.article-cta a {
  display: inline-block;
  margin-top: 10px;
  padding: 10px 20px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  color: #fff;
  border-radius: var(--radius-sm);
  font-weight: 600;
  text-decoration: none;
}
.article-cta a:hover { text-decoration: none; opacity: 0.9; }

/* ============ AMORTIZATION TABLE ============ */
.amort-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
  font-variant-numeric: tabular-nums;
}
.amort-table thead th {
  background: var(--surface-2);
  color: var(--text-muted);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 10px 12px;
  text-align: left;
  border-bottom: 1px solid var(--border);
}
.amort-table tbody td {
  padding: 10px 12px;
  border-bottom: 1px solid var(--border);
  color: var(--text);
}
.amort-table tbody tr:hover { background: var(--surface-2); }

/* ============ MOTION ============ */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}

/* ==========================================================================
   Language dropdown
   ========================================================================== */
.lang-dropdown .lang-current {
  display: inline-flex;
  align-items: center;
  gap: 0.4em;
  font-weight: 600;
  letter-spacing: 0.02em;
}

.lang-dropdown .nav-dropdown-menu.lang-menu {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4px;
  padding: 8px;
  min-width: 240px;
  width: 240px;
}

.lang-menu button[data-locale] {
  display: inline-flex;
  align-items: center;
  gap: 0.5em;
  padding: 8px 10px;
  background: transparent;
  border: 0;
  border-radius: 8px;
  font: inherit;
  color: inherit;
  text-align: left;
  cursor: pointer;
  transition: background 0.15s ease;
}

.lang-menu button[data-locale]:hover,
.lang-menu button[data-locale]:focus-visible {
  background: var(--surface-2);
  outline: none;
}

.lang-menu button[data-locale][aria-current="true"] {
  background: var(--surface-2);
  font-weight: 700;
}

.lang-menu .flag {
  font-size: 1.1em;
  line-height: 1;
}

.lang-menu .lang-label {
  font-size: 0.95em;
}

@media (max-width: 880px) {
  .lang-dropdown .nav-dropdown-menu.lang-menu {
    width: 100%;
    min-width: 0;
  }
}