/* ═══════════════════════════════════════════════
   CalcMitra – style.css
   Design: Clean Financial Dark/Light
   Font: Sora (display) + JetBrains Mono (numbers)
═══════════════════════════════════════════════ */

/* ─── CSS Variables ─── */
:root {
  --bg:          #f8fafc;
  --bg2:         #f1f5f9;
  --bg3:         #e2e8f0;
  --surface:     #ffffff;
  --border:      #e2e8f0;
  --text:        #0f172a;
  --text2:       #475569;
  --text3:       #94a3b8;
  --accent:      #6366f1;
  --accent2:     #8b5cf6;
  --accent-glow: rgba(99,102,241,0.18);
  --green:       #10b981;
  --red:         #ef4444;
  --amber:       #f59e0b;
  --radius:      14px;
  --radius-sm:   8px;
  --shadow:      0 4px 24px rgba(0,0,0,0.06);
  --shadow-lg:   0 8px 48px rgba(0,0,0,0.12);
  --transition:  0.22s cubic-bezier(0.4,0,0.2,1);
  --header-h:    64px;
}

[data-theme="dark"] {
  --bg:      #0a0f1e;
  --bg2:     #0f172a;
  --bg3:     #1e293b;
  --surface: #1e293b;
  --border:  #334155;
  --text:    #f1f5f9;
  --text2:   #94a3b8;
  --text3:   #475569;
  --shadow:      0 4px 24px rgba(0,0,0,0.4);
  --shadow-lg:   0 8px 48px rgba(0,0,0,0.6);
}

/* ─── Reset ─── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }

body {
  font-family: 'Sora', sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.65;
  transition: background var(--transition), color var(--transition);
  overflow-x: hidden;
}

/* ─── Typography ─── */
h1 { font-size: clamp(2rem, 5vw, 3.2rem); font-weight: 800; line-height: 1.15; }
h2 { font-size: clamp(1.4rem, 3vw, 2rem); font-weight: 700; }
h3 { font-size: 1.1rem; font-weight: 700; }
h4 { font-size: 0.9rem; font-weight: 600; text-transform: uppercase; letter-spacing: 0.08em; color: var(--text3); }
p  { color: var(--text2); }
a  { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

.gradient-text {
  background: linear-gradient(135deg, var(--accent), var(--accent2), #ec4899);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ═══════════════ HEADER ═══════════════ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  height: var(--header-h);
  background: rgba(var(--surface-rgb, 255,255,255), 0.85);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border-bottom: 1px solid var(--border);
  transition: background var(--transition), border-color var(--transition);
}

[data-theme="dark"] .site-header {
  background: rgba(10,15,30,0.85);
}

.header-inner {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 1.5rem;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--text);
  text-decoration: none;
}
.logo-icon { font-size: 1.5rem; }
.logo-text strong { color: var(--accent); }

.main-nav { display: flex; gap: 0.25rem; }
.main-nav a {
  padding: 0.45rem 0.9rem;
  border-radius: var(--radius-sm);
  font-size: 0.92rem;
  font-weight: 500;
  color: var(--text2);
  transition: background var(--transition), color var(--transition);
}
.main-nav a:hover { background: var(--bg2); color: var(--text); text-decoration: none; }

.header-actions { display: flex; align-items: center; gap: 0.5rem; }

.dark-toggle {
  width: 40px; height: 40px;
  border-radius: 50%;
  border: 1.5px solid var(--border);
  background: var(--surface);
  cursor: pointer;
  font-size: 1.1rem;
  display: flex; align-items: center; justify-content: center;
  transition: background var(--transition), border var(--transition), transform 0.2s;
}
.dark-toggle:hover { transform: scale(1.1); }

.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  width: 40px; height: 40px;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--surface);
  cursor: pointer;
  padding: 10px 9px;
  justify-content: center;
}
.hamburger span {
  display: block;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: transform 0.2s;
}

/* ═══════════════ PAGES ═══════════════ */
.page { display: none; }
.page.active { display: block; animation: fadeUp 0.4s ease both; }

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(20px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ═══════════════ HERO ═══════════════ */
.hero {
  position: relative;
  overflow: hidden;
  padding: 5rem 1.5rem 4rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 1280px;
  margin: 0 auto;
  gap: 2rem;
}

.hero-bg-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--border) 1px, transparent 1px),
    linear-gradient(90deg, var(--border) 1px, transparent 1px);
  background-size: 40px 40px;
  opacity: 0.5;
  pointer-events: none;
}

.hero-content { position: relative; max-width: 600px; }

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  background: var(--accent-glow);
  border: 1px solid var(--accent);
  color: var(--accent);
  font-size: 0.8rem;
  font-weight: 600;
  padding: 0.3rem 0.8rem;
  border-radius: 999px;
  margin-bottom: 1.2rem;
  letter-spacing: 0.04em;
}

.hero-title { margin-bottom: 1rem; }
.hero-subtitle { font-size: 1.15rem; color: var(--text2); margin-bottom: 2rem; max-width: 480px; }

/* Search */
.search-wrapper {
  position: relative;
  max-width: 500px;
}
.search-icon {
  position: absolute;
  left: 1rem; top: 50%;
  transform: translateY(-50%);
  font-size: 1rem;
  pointer-events: none;
}
.search-input {
  width: 100%;
  padding: 0.85rem 3.5rem 0.85rem 2.8rem;
  border: 2px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  color: var(--text);
  font-family: 'Sora', sans-serif;
  font-size: 0.95rem;
  transition: border-color var(--transition), box-shadow var(--transition);
  outline: none;
}
.search-input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 4px var(--accent-glow);
}
.search-input::placeholder { color: var(--text3); }
.search-shortcut {
  position: absolute;
  right: 1rem; top: 50%;
  transform: translateY(-50%);
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 1px 6px;
  font-size: 0.7rem;
  color: var(--text3);
  font-family: 'JetBrains Mono', monospace;
}

/* Hero visual floaters */
.hero-visual {
  position: relative;
  width: 280px;
  height: 280px;
  flex-shrink: 0;
}
.float-card {
  position: absolute;
  width: 90px; height: 90px;
  background: var(--surface);
  border: 1.5px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  font-size: 1.8rem;
  gap: 0.2rem;
}
.float-card small { font-size: 0.65rem; font-weight: 600; color: var(--text3); font-family: 'JetBrains Mono', monospace; }
.fc1 { top: 10px; left: 10px; animation: float1 4s ease-in-out infinite; }
.fc2 { top: 10px; right: 10px; animation: float2 4.5s ease-in-out infinite; }
.fc3 { bottom: 10px; left: 10px; animation: float2 3.8s ease-in-out infinite; }
.fc4 { bottom: 10px; right: 10px; animation: float1 5s ease-in-out infinite; }

@keyframes float1 { 0%,100%{transform:translateY(0)} 50%{transform:translateY(-12px)} }
@keyframes float2 { 0%,100%{transform:translateY(0)} 50%{transform:translateY(10px)} }

/* ═══════════════ AD SLOTS ═══════════════ */
.ad-slot {
  max-width: 1280px;
  margin: 1rem auto;
  padding: 0 1.5rem;
  min-height: 0;
  overflow: hidden;
}
/* Remove forced min-height so empty AdSense slots collapse */
.ad-slot ins.adsbygoogle {
  min-height: 0 !important;
}
.ad-slot > span,
.ad-slot > div {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 0;
  background: transparent;
  border: none;
  border-radius: var(--radius);
  color: var(--text3);
  font-size: 0.8rem;
  font-style: italic;
}

/* ═══════════════ CALC SECTION ═══════════════ */
.calc-section {
  max-width: 1280px;
  margin: 0 auto;
  padding: 3rem 1.5rem;
}
.section-header { text-align: center; margin-bottom: 2.5rem; }
.section-header h2 { margin-bottom: 0.4rem; }

.calc-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  gap: 1.2rem;
}

.calc-card {
  background: var(--surface);
  border: 1.5px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  cursor: pointer;
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
  position: relative;
  overflow: hidden;
}
.calc-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, var(--accent-glow), transparent);
  opacity: 0;
  transition: opacity var(--transition);
}
.calc-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); border-color: var(--accent); }
.calc-card:hover::before { opacity: 1; }
.calc-card:active { transform: translateY(-2px); }

.card-icon {
  width: 52px; height: 52px;
  border-radius: 12px;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.6rem;
  margin-bottom: 1rem;
  flex-shrink: 0;
}
.calc-card h3 { margin-bottom: 0.4rem; }
.calc-card p  { font-size: 0.88rem; margin-bottom: 0.8rem; }

.card-badge {
  display: inline-block;
  background: var(--bg2);
  border: 1px solid var(--border);
  color: var(--text3);
  font-size: 0.7rem;
  font-weight: 600;
  padding: 0.2rem 0.6rem;
  border-radius: 999px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.no-results { text-align: center; color: var(--text3); font-size: 1rem; padding: 2rem; }

/* ═══════════════ FEATURES STRIP ═══════════════ */
.features-strip {
  display: flex;
  justify-content: center;
  gap: 2rem;
  flex-wrap: wrap;
  padding: 3rem 1.5rem;
  background: var(--bg2);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  margin-top: 2rem;
}
.feature { display: flex; flex-direction: column; align-items: center; gap: 0.4rem; }
.feature span { font-size: 1.8rem; }
.feature p { font-size: 0.85rem; font-weight: 600; color: var(--text2); margin: 0; }

/* ═══════════════ INNER PAGES ═══════════════ */
.inner-page {
  max-width: 760px;
  margin: 0 auto;
  padding: 3rem 1.5rem;
}
.inner-page h1 { margin-bottom: 1.2rem; }
.inner-page h2 { margin: 2rem 0 0.8rem; font-size: 1.3rem; }
.inner-page p  { margin-bottom: 1rem; line-height: 1.8; }
.inner-page ul { padding-left: 0; list-style: none; display: flex; flex-direction: column; gap: 0.6rem; }
.inner-page li { padding: 0.6rem 0; border-bottom: 1px solid var(--border); color: var(--text2); }

.about-list { margin-bottom: 2rem; }

/* Contact Form */
.contact-form { display: flex; flex-direction: column; gap: 1.2rem; margin-top: 1.5rem; }
.form-group { display: flex; flex-direction: column; gap: 0.4rem; }
.form-group label { font-size: 0.88rem; font-weight: 600; color: var(--text2); }
.form-group input, .form-group textarea {
  padding: 0.8rem 1rem;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--bg2);
  color: var(--text);
  font-family: 'Sora', sans-serif;
  font-size: 0.95rem;
  transition: border-color var(--transition);
  outline: none;
  resize: vertical;
}
.form-group input:focus, .form-group textarea:focus { border-color: var(--accent); }
.form-note { color: var(--green); font-weight: 600; margin-top: 0.5rem; }

/* Buttons */
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: var(--radius-sm);
  padding: 0.75rem 1.5rem;
  font-family: 'Sora', sans-serif;
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: opacity var(--transition), transform var(--transition);
}
.btn-primary:hover { opacity: 0.9; transform: translateY(-1px); }

.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  background: transparent;
  color: var(--text2);
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 0.7rem 1.4rem;
  font-family: 'Sora', sans-serif;
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  transition: background var(--transition), color var(--transition);
}
.btn-secondary:hover { background: var(--bg2); color: var(--text); }

/* ═══════════════ FAQ ═══════════════ */
.faq-list { display: flex; flex-direction: column; gap: 0.8rem; margin-top: 1.5rem; }
.faq-item {
  background: var(--surface);
  border: 1.5px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}
.faq-item summary {
  padding: 1.1rem 1.3rem;
  font-weight: 600;
  cursor: pointer;
  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(--accent); transition: transform 0.2s; }
.faq-item[open] summary::after { transform: rotate(45deg); }
.faq-item p { padding: 0 1.3rem 1.1rem; color: var(--text2); font-size: 0.93rem; }

/* ═══════════════ MODAL ═══════════════ */
.modal-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.6);
  backdrop-filter: blur(4px);
  z-index: 2000;
  align-items: center;
  justify-content: center;
  padding: 1rem;
  animation: fadeIn 0.2s ease;
}
.modal-overlay.active { display: flex; }

@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }

.modal {
  background: var(--surface);
  border: 1.5px solid var(--border);
  border-radius: var(--radius);
  width: 100%;
  max-width: 680px;
  max-height: 90vh;
  overflow-y: auto;
  position: relative;
  animation: slideUp 0.3s cubic-bezier(0.4,0,0.2,1);
  box-shadow: var(--shadow-lg);
}

@keyframes slideUp { from { transform: translateY(40px); opacity: 0; } to { transform: translateY(0); opacity: 1; } }

.modal-close {
  position: sticky;
  top: 1rem;
  float: right;
  margin: 1rem 1rem 0 0;
  width: 36px; height: 36px;
  border-radius: 50%;
  border: 1.5px solid var(--border);
  background: var(--bg2);
  color: var(--text);
  font-size: 1rem;
  cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  z-index: 10;
  transition: background var(--transition);
}
.modal-close:hover { background: var(--red); color: #fff; border-color: var(--red); }

.modal-body { padding: 1.5rem 2rem 2rem; clear: both; }
.modal-body h2 { margin-bottom: 1.5rem; font-size: 1.5rem; }

/* ─── Calc Form ─── */
.calc-form { display: flex; flex-direction: column; gap: 1rem; }
.calc-form .form-group { display: flex; flex-direction: column; gap: 0.4rem; }
.calc-form label { font-size: 0.85rem; font-weight: 600; color: var(--text2); }
.calc-form input, .calc-form select {
  padding: 0.75rem 1rem;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--bg2);
  color: var(--text);
  font-family: 'Sora', sans-serif;
  font-size: 1rem;
  font-family: 'JetBrains Mono', monospace;
  outline: none;
  transition: border-color var(--transition);
}
.calc-form input:focus, .calc-form select:focus { border-color: var(--accent); }

.calc-btn {
  margin-top: 0.5rem;
  padding: 0.9rem;
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: var(--radius-sm);
  font-family: 'Sora', sans-serif;
  font-size: 1rem;
  font-weight: 700;
  cursor: pointer;
  transition: opacity var(--transition), transform var(--transition);
  letter-spacing: 0.02em;
}
.calc-btn:hover { opacity: 0.9; transform: translateY(-1px); }
.calc-btn:active { transform: translateY(0); }

/* ─── Result Panel ─── */
.result-panel {
  margin-top: 1.5rem;
  background: var(--bg2);
  border: 1.5px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  display: none;
  animation: fadeUp 0.3s ease;
}
.result-panel.show { display: block; }
.result-panel h3 { font-size: 0.85rem; text-transform: uppercase; letter-spacing: 0.08em; color: var(--text3); margin-bottom: 1rem; }

.result-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 1rem;
  margin-bottom: 1.2rem;
}
.result-item { display: flex; flex-direction: column; gap: 0.2rem; }
.result-label { font-size: 0.78rem; color: var(--text3); font-weight: 500; }
.result-value {
  font-family: 'JetBrains Mono', monospace;
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--accent);
}
.result-value.green { color: var(--green); }
.result-value.red   { color: var(--red); }
.result-value.amber { color: var(--amber); }

.formula-box {
  background: var(--bg3);
  border-left: 3px solid var(--accent);
  border-radius: var(--radius-sm);
  padding: 1rem;
  margin-top: 1rem;
}
.formula-box p {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.82rem;
  color: var(--text2);
  margin: 0 0 0.4rem;
  line-height: 1.7;
}
.formula-box p:last-child { margin: 0; }
.formula-box strong { color: var(--text); }

.toggle-row {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 1rem;
}
.toggle-btn {
  flex: 1;
  padding: 0.6rem;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  background: transparent;
  color: var(--text2);
  font-family: 'Sora', sans-serif;
  font-size: 0.88rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition);
}
.toggle-btn.active {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

.error-msg { color: var(--red); font-size: 0.83rem; margin-top: 0.3rem; display: none; }
.error-msg.show { display: block; }

/* ─── Donut Chart ─── */
.donut-wrap { display: flex; align-items: center; justify-content: center; gap: 1.5rem; flex-wrap: wrap; margin-top: 1rem; }
.donut-svg { transform: rotate(-90deg); }
.donut-legend { display: flex; flex-direction: column; gap: 0.5rem; }
.donut-legend-item { display: flex; align-items: center; gap: 0.5rem; font-size: 0.82rem; }
.donut-dot { width: 10px; height: 10px; border-radius: 50%; flex-shrink: 0; }

/* ═══════════════ FOOTER ═══════════════ */
.site-footer {
  background: var(--bg2);
  border-top: 1px solid var(--border);
  padding: 3rem 1.5rem 0;
  margin-top: 4rem;
}
.footer-inner {
  max-width: 1280px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 2rem;
  padding-bottom: 2rem;
}
.footer-brand .logo-icon { font-size: 1.5rem; }
.footer-brand strong { font-size: 1.2rem; }
.footer-brand p { margin-top: 0.5rem; font-size: 0.88rem; }
.footer-links { display: flex; flex-direction: column; gap: 0.5rem; }
.footer-links h4 { margin-bottom: 0.5rem; }
.footer-links a { font-size: 0.88rem; color: var(--text2); transition: color var(--transition); }
.footer-links a:hover { color: var(--accent); text-decoration: none; }
.footer-bottom {
  border-top: 1px solid var(--border);
  padding: 1.2rem 0;
  text-align: center;
  max-width: 1280px;
  margin: 0 auto;
}
.footer-bottom p { font-size: 0.82rem; color: var(--text3); margin: 0; }

/* ═══════════════ RESPONSIVE ═══════════════ */
@media (max-width: 900px) {
  .footer-inner { grid-template-columns: 1fr 1fr; }
  .hero { flex-direction: column; padding: 3rem 1.5rem 2.5rem; text-align: center; }
  .hero-visual { display: none; }
  .search-wrapper { max-width: 100%; }
}

@media (max-width: 640px) {
  .main-nav { 
    display: none;
    position: fixed;
    top: var(--header-h);
    left: 0; right: 0;
    background: var(--surface);
    border-bottom: 1px solid var(--border);
    flex-direction: column;
    padding: 1rem;
    gap: 0.25rem;
    z-index: 999;
    box-shadow: var(--shadow);
  }
  .main-nav.open { display: flex; }
  .main-nav a { padding: 0.75rem 1rem; }
  .hamburger { display: flex; }
  .search-shortcut { display: none; }
  .footer-inner { grid-template-columns: 1fr; }
  .modal-body { padding: 1rem 1.2rem 1.5rem; }
  .result-grid { grid-template-columns: 1fr 1fr; }
  .donut-wrap { flex-direction: column; }
}

@media (max-width: 420px) {
  .calc-grid { grid-template-columns: 1fr; }
}

/* ═══════════════════════════════════════════════════════
   MOBILE WHITESPACE FIXES  (<=640px only, desktop untouched)
   ═══════════════════════════════════════════════════════ */
@media (max-width: 640px) {

  /* 1. BIGGEST FIX: every .page was forced to fill 100vh
        so even a short page left a giant blank gap below content */
  .page {
    min-height: 0 !important;
  }

  /* 2. Hero: was 5rem top + 4rem bottom (9rem!) -> now 1.75rem / 1.25rem
        Also overrides the 900px rule which sets it to 3rem / 2.5rem */
  .hero {
    padding: 1.75rem 1.25rem 1.25rem !important;
  }

  /* 3. Hero text spacing */
  .hero-badge    { margin-bottom: 0.6rem; }
  .hero-title    { margin-bottom: 0.5rem; }
  .hero-subtitle { margin-bottom: 1rem; font-size: 1rem; }

  /* 4. Calculator section padding: 3rem -> 1rem top, 1.5rem bottom */
  .calc-section {
    padding: 1rem 1.25rem 1.5rem;
  }

  /* 5. Section header gap: 2.5rem -> 1rem */
  .section-header {
    margin-bottom: 1rem;
  }

  /* 6. Features strip: 3rem vertical -> 1.25rem; margin-top: 2rem -> 0.75rem */
  .features-strip {
    padding: 1.25rem 1rem;
    gap: 1rem;
    margin-top: 0.75rem;
  }

  /* 7. All inner pages (About/Contact/FAQ/Legal/Blog): 3rem -> 1.25rem top */
  .inner-page {
    padding: 1.25rem 1.25rem 1.75rem;
  }
  .inner-page h1 { margin-bottom: 0.6rem; }
  .inner-page h2 { margin-top: 1rem; margin-bottom: 0.5rem; }

  /* 8. Footer: margin-top 4rem -> 1.5rem, padding-top 3rem -> 1.5rem */
  .site-footer {
    margin-top: 1.5rem !important;
    padding-top: 1.5rem;
  }

  /* 9. Ad slots: adsbygoogle ins tags hold space even before ads load.
        Collapse them on mobile until AdSense expands them. */
  .ad-slot {
    margin: 0.4rem auto !important;
    padding: 0 1rem;
  }
  .ad-slot ins.adsbygoogle {
    min-height: 0 !important;
    height: auto !important;
  }
  .ad-slot > span,
  .ad-slot > div {
    min-height: 0 !important;
  }

  /* 10. Blog strip inline-style overrides */
  #blog-strip {
    margin-bottom: 0.75rem !important;
    padding: 0 0.75rem !important;
    gap: 0.5rem !important;
  }

  /* 11. Calc card padding: tighten slightly */
  .calc-card {
    padding: 1.1rem;
  }
  .card-icon {
    width: 44px;
    height: 44px;
    font-size: 1.3rem;
    margin-bottom: 0.6rem;
  }
}

/* ═══════════════ COMPOUND INTEREST PAGE ═══════════════ */
.ci-page {
  max-width: 1100px;
  margin: 0 auto;
  padding: 2.5rem 1.5rem 3rem;
}

/* ── Page Hero ── */
.ci-hero {
  text-align: center;
  margin-bottom: 2.5rem;
}
.ci-hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  background: var(--accent-glow);
  border: 1px solid var(--accent);
  color: var(--accent);
  font-size: 0.78rem;
  font-weight: 600;
  padding: 0.28rem 0.8rem;
  border-radius: 999px;
  margin-bottom: 0.9rem;
  letter-spacing: 0.04em;
}
.ci-hero h1 {
  font-size: clamp(1.7rem, 4vw, 2.6rem);
  font-weight: 800;
  margin-bottom: 0.6rem;
  line-height: 1.2;
}
.ci-hero p {
  font-size: 1rem;
  color: var(--text2);
  max-width: 560px;
  margin: 0 auto;
}

/* ── Main Layout ── */
.ci-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
  align-items: start;
}

/* ── Calculator Card ── */
.ci-card {
  background: var(--surface);
  border: 1.5px solid var(--border);
  border-radius: var(--radius);
  padding: 1.75rem;
  box-shadow: var(--shadow);
}
.ci-card-title {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 1.25rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

/* ── Form ── */
.ci-form { display: flex; flex-direction: column; gap: 1.1rem; }

.ci-form .form-group { display: flex; flex-direction: column; gap: 0.35rem; }
.ci-form label {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text2);
}

.ci-input-wrap { position: relative; }
.ci-input-prefix {
  position: absolute;
  left: 0.85rem;
  top: 50%;
  transform: translateY(-50%);
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.9rem;
  color: var(--text3);
  pointer-events: none;
}
.ci-input-suffix {
  position: absolute;
  right: 0.85rem;
  top: 50%;
  transform: translateY(-50%);
  font-size: 0.82rem;
  color: var(--text3);
  pointer-events: none;
}

.ci-form input,
.ci-form select {
  width: 100%;
  padding: 0.75rem 2.2rem 0.75rem 2rem;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--bg2);
  color: var(--text);
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.97rem;
  outline: none;
  transition: border-color var(--transition), box-shadow var(--transition);
}
.ci-form input:focus,
.ci-form select:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow);
}
.ci-form input.input-error { border-color: var(--red); }

.ci-form select { padding-left: 0.9rem; }

.ci-error {
  font-size: 0.78rem;
  color: var(--red);
  display: none;
  margin-top: 0.1rem;
}
.ci-error.show { display: block; }

/* Frequency chips */
.ci-freq-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.5rem;
}
.ci-freq-btn {
  padding: 0.55rem 0.5rem;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  background: transparent;
  color: var(--text2);
  font-family: 'Sora', sans-serif;
  font-size: 0.82rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition);
  text-align: center;
}
.ci-freq-btn:hover { border-color: var(--accent); color: var(--accent); }
.ci-freq-btn.active {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

.ci-calc-btn {
  margin-top: 0.25rem;
  padding: 0.9rem;
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  color: #fff;
  border: none;
  border-radius: var(--radius-sm);
  font-family: 'Sora', sans-serif;
  font-size: 1rem;
  font-weight: 700;
  cursor: pointer;
  transition: opacity var(--transition), transform var(--transition);
  letter-spacing: 0.02em;
}
.ci-calc-btn:hover { opacity: 0.9; transform: translateY(-1px); }
.ci-calc-btn:active { transform: translateY(0); }

.ci-reset-btn {
  padding: 0.65rem;
  background: transparent;
  color: var(--text3);
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  font-family: 'Sora', sans-serif;
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition);
}
.ci-reset-btn:hover { border-color: var(--red); color: var(--red); }

/* ── Results Panel ── */
.ci-results {
  display: none;
  animation: fadeUp 0.35s ease both;
}
.ci-results.show { display: flex; flex-direction: column; gap: 1.25rem; }

/* Maturity highlight */
.ci-maturity-card {
  background: linear-gradient(135deg, var(--accent) 0%, var(--accent2) 100%);
  border-radius: var(--radius);
  padding: 1.5rem;
  text-align: center;
  color: #fff;
  box-shadow: 0 8px 32px rgba(99,102,241,0.28);
}
.ci-maturity-label {
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  opacity: 0.85;
  margin-bottom: 0.4rem;
}
.ci-maturity-value {
  font-family: 'JetBrains Mono', monospace;
  font-size: clamp(1.8rem, 4vw, 2.5rem);
  font-weight: 800;
  letter-spacing: -0.02em;
}

/* Breakdown stats */
.ci-stats-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.85rem;
}
.ci-stat {
  background: var(--bg2);
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 1rem;
}
.ci-stat-label {
  font-size: 0.72rem;
  color: var(--text3);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 0.3rem;
}
.ci-stat-value {
  font-family: 'JetBrains Mono', monospace;
  font-size: 1.2rem;
  font-weight: 700;
}
.ci-stat-value.green { color: var(--green); }
.ci-stat-value.amber { color: var(--amber); }
.ci-stat-value.accent { color: var(--accent); }

/* Donut in results */
.ci-donut-card {
  background: var(--surface);
  border: 1.5px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem;
}
.ci-donut-title {
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  color: var(--text3);
  margin-bottom: 1rem;
}

/* Formula box in results */
.ci-formula-card {
  background: var(--bg2);
  border: 1.5px solid var(--border);
  border-left: 3px solid var(--accent);
  border-radius: var(--radius-sm);
  padding: 1rem 1.1rem;
}
.ci-formula-title {
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  color: var(--accent);
  margin-bottom: 0.6rem;
}
.ci-formula-card p {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.81rem;
  color: var(--text2);
  line-height: 1.7;
  margin: 0;
}
.ci-formula-card p + p { margin-top: 0.3rem; }
.ci-formula-card strong { color: var(--text); }

/* ── Content Section ── */
.ci-content-section {
  margin-top: 3rem;
  padding-top: 2.5rem;
  border-top: 1px solid var(--border);
}

.ci-intro-header {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  margin-bottom: 1rem;
}
.ci-intro-header h2 {
  font-size: clamp(1.2rem, 3vw, 1.6rem);
  font-weight: 700;
  margin: 0;
}

.ci-intro-text p {
  color: var(--text2);
  line-height: 1.8;
  margin-bottom: 0.9rem;
  font-size: 0.97rem;
}
.ci-intro-text p:last-child { margin-bottom: 0; }

.ci-read-more-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  margin-top: 1.25rem;
  padding: 0.7rem 1.5rem;
  background: var(--accent-glow);
  border: 1.5px solid var(--accent);
  border-radius: var(--radius-sm);
  color: var(--accent);
  font-family: 'Sora', sans-serif;
  font-size: 0.92rem;
  font-weight: 700;
  cursor: pointer;
  transition: all var(--transition);
}
.ci-read-more-btn:hover {
  background: var(--accent);
  color: #fff;
}
.ci-read-more-btn .ci-btn-arrow {
  display: inline-block;
  transition: transform 0.25s;
}
.ci-read-more-btn.expanded .ci-btn-arrow { transform: rotate(180deg); }

/* ── Expandable Educational Content ── */
.ci-edu-section {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.55s cubic-bezier(0.4, 0, 0.2, 1);
}
.ci-edu-section.open { max-height: 6000px; }

.ci-edu-inner {
  padding-top: 2rem;
}

.ci-edu-inner h2 {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text);
  margin: 2rem 0 0.6rem;
  padding-bottom: 0.4rem;
  border-bottom: 2px solid var(--accent-glow);
}
.ci-edu-inner h2:first-child { margin-top: 0; }

.ci-edu-inner h3 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text);
  margin: 1.2rem 0 0.4rem;
}

.ci-edu-inner p {
  color: var(--text2);
  line-height: 1.8;
  font-size: 0.95rem;
  margin-bottom: 0.85rem;
}

.ci-edu-inner ul,
.ci-edu-inner ol {
  padding-left: 1.4rem;
  margin-bottom: 1rem;
}
.ci-edu-inner li {
  color: var(--text2);
  line-height: 1.8;
  font-size: 0.95rem;
  margin-bottom: 0.35rem;
}

/* Comparison table */
.ci-compare-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
  margin: 1rem 0;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1.5px solid var(--border);
}
.ci-compare-table thead tr { background: linear-gradient(135deg, var(--accent), var(--accent2)); color: #fff; }
.ci-compare-table th { padding: 0.75rem 1rem; text-align: left; font-weight: 700; }
.ci-compare-table td { padding: 0.65rem 1rem; border-bottom: 1px solid var(--border); }
.ci-compare-table tbody tr:last-child td { border-bottom: none; }
.ci-compare-table tbody tr:nth-child(even) { background: var(--bg2); }

/* Example box */
.ci-example-box {
  background: var(--bg2);
  border: 1.5px solid var(--border);
  border-left: 3px solid var(--green);
  border-radius: var(--radius-sm);
  padding: 1.1rem 1.2rem;
  margin: 1rem 0;
}
.ci-example-box strong { color: var(--text); }
.ci-example-box p {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.82rem;
  margin-bottom: 0.3rem;
}
.ci-example-box p:last-child { margin-bottom: 0; }

/* CI FAQ */
.ci-faq-list {
  display: flex;
  flex-direction: column;
  gap: 0.7rem;
  margin-top: 1rem;
}

/* ── Back button row ── */
.ci-back-row {
  margin-top: 2rem;
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
}

/* ── Responsive ── */
@media (max-width: 860px) {
  .ci-layout {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  .ci-page {
    padding: 1.25rem 1rem 2rem;
  }
  .ci-hero { margin-bottom: 1.5rem; }
  .ci-card { padding: 1.25rem; }
  .ci-stats-grid { grid-template-columns: 1fr 1fr; gap: 0.65rem; }
  .ci-maturity-value { font-size: 1.8rem; }
  .ci-content-section { margin-top: 2rem; padding-top: 1.75rem; }
  .ci-edu-inner h2 { font-size: 1.1rem; }
  .ci-compare-table { font-size: 0.82rem; }
  .ci-compare-table th, .ci-compare-table td { padding: 0.55rem 0.7rem; }
}

/* ─── Scrollbar ─── */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--bg3); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--text3); }

/* ─── Selection ─── */
::selection { background: var(--accent); color: #fff; }


/* ═══════════════════════════════════════════════════════
   NUMVEXA ADDITIONS — calculators.html + calc pages
   (appended; do not modify above)
═══════════════════════════════════════════════════════ */

/* ── Show hamburger at 900px for multi-page nav ── */
@media (max-width: 900px) {
  .hamburger { display: flex; }
  .main-nav {
    display: none;
    position: fixed;
    top: var(--header-h);
    left: 0; right: 0;
    background: var(--surface);
    border-bottom: 1px solid var(--border);
    flex-direction: column;
    padding: 1rem;
    gap: 0.25rem;
    z-index: 999;
    box-shadow: var(--shadow);
  }
  .main-nav.open { display: flex; }
  .main-nav a { padding: 0.75rem 1rem; font-size: 0.95rem; }
}

/* ── Site footer – 4 columns on desktop ── */
.site-footer { border-top: 1px solid var(--border); padding: 3rem 1.5rem 1.5rem; }
.footer-inner {
  max-width: 1280px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1.4fr repeat(3, 1fr);
  gap: 2rem;
  margin-bottom: 2rem;
}
.footer-brand { display: flex; flex-direction: column; gap: 0.3rem; }
.footer-brand .logo-icon { font-size: 1.5rem; }
.footer-brand strong { font-size: 1.1rem; }
.footer-brand p { font-size: 0.85rem; margin: 0; }
.footer-links { display: flex; flex-direction: column; gap: 0.5rem; }
.footer-links h4 { margin-bottom: 0.25rem; }
.footer-links a { font-size: 0.88rem; color: var(--text2); transition: color var(--transition); }
.footer-links a:hover { color: var(--accent); text-decoration: none; }
.footer-bottom {
  max-width: 1280px;
  margin: 0 auto;
  padding-top: 1.25rem;
  border-top: 1px solid var(--border);
  font-size: 0.82rem;
  color: var(--text3);
  text-align: center;
}
@media (max-width: 900px) {
  .footer-inner { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 560px) {
  .footer-inner { grid-template-columns: 1fr; gap: 1.5rem; }
  .site-footer { padding: 2rem 1rem 1.25rem; }
}

/* ── "View Full Page" card link on homepage ── */
.card-view-link {
  display: inline-flex;
  align-items: center;
  gap: .3rem;
  margin-top: .5rem;
  font-size: .76rem;
  font-weight: 700;
  color: var(--accent);
  text-decoration: none;
  letter-spacing: .02em;
  position: relative;
  z-index: 2;
  transition: opacity .2s;
}
.card-view-link:hover { opacity: .75; text-decoration: underline; }

/* ══════════════════════════════════════════
   CALCULATOR DIRECTORY PAGE  (calculators.html)
══════════════════════════════════════════ */

.calc-dir-hero {
  background: linear-gradient(135deg, var(--bg) 0%, var(--bg2) 100%);
  border-bottom: 1px solid var(--border);
  padding: 3rem 1.5rem 2.5rem;
  position: relative;
  overflow: hidden;
}
.calc-dir-hero::before {
  content: '';
  position: absolute; inset: 0;
  background-image:
    linear-gradient(var(--border) 1px, transparent 1px),
    linear-gradient(90deg, var(--border) 1px, transparent 1px);
  background-size: 40px 40px;
  opacity: 0.35;
  pointer-events: none;
}
.calc-dir-hero-inner { max-width: 1280px; margin: 0 auto; position: relative; }

.calc-dir-breadcrumb {
  display: flex; align-items: center; gap: .4rem;
  font-size: .82rem; color: var(--text3);
  margin-bottom: 1.25rem; flex-wrap: wrap;
}
.calc-dir-breadcrumb a { color: var(--accent); text-decoration: none; }
.calc-dir-breadcrumb a:hover { text-decoration: underline; }
.calc-dir-breadcrumb span { color: var(--text3); }

.calc-dir-title {
  font-size: clamp(1.75rem, 4vw, 2.8rem);
  font-weight: 800; line-height: 1.15; margin-bottom: .6rem;
}
.calc-dir-subtitle {
  font-size: 1.05rem; color: var(--text2);
  max-width: 600px; margin-bottom: 2rem;
}
.calc-dir-stats { display: flex; gap: 2rem; flex-wrap: wrap; }
.calc-dir-stat { display: flex; flex-direction: column; gap: .15rem; }
.calc-dir-stat strong {
  font-family: 'JetBrains Mono', monospace;
  font-size: 1.5rem; font-weight: 800; color: var(--accent);
}
.calc-dir-stat span {
  font-size: .78rem; color: var(--text3);
  font-weight: 600; text-transform: uppercase; letter-spacing: .05em;
}

/* Controls bar */
.calc-dir-controls {
  max-width: 1280px; margin: 0 auto;
  padding: 1.75rem 1.5rem 0;
  display: flex; gap: 1rem; flex-wrap: wrap; align-items: center;
}
.calc-dir-search-wrap {
  position: relative; flex: 1; min-width: 220px; max-width: 420px;
}
.calc-dir-search-icon {
  position: absolute; left: 1rem; top: 50%;
  transform: translateY(-50%); font-size: 1rem; pointer-events: none;
}
.calc-dir-search {
  width: 100%;
  padding: .8rem 1rem .8rem 2.8rem;
  border: 2px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface); color: var(--text);
  font-family: 'Sora', sans-serif; font-size: .92rem;
  transition: border-color var(--transition), box-shadow var(--transition);
  outline: none;
}
.calc-dir-search:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 4px var(--accent-glow);
}
.calc-dir-search::placeholder { color: var(--text3); }
.calc-dir-filters { display: flex; gap: .5rem; flex-wrap: wrap; align-items: center; }
.filter-pill {
  padding: .45rem 1rem;
  border: 1.5px solid var(--border);
  border-radius: 999px;
  background: var(--surface); color: var(--text2);
  font-size: .82rem; font-weight: 600; cursor: pointer;
  transition: all var(--transition); white-space: nowrap;
  font-family: 'Sora', sans-serif;
}
.filter-pill:hover { border-color: var(--accent); color: var(--accent); }
.filter-pill.active { background: var(--accent); border-color: var(--accent); color: #fff; }

.calc-dir-result-count {
  font-size: .85rem; color: var(--text3);
  padding: 0 1.5rem; max-width: 1280px; margin: .5rem auto 0;
}
.calc-dir-main { max-width: 1280px; margin: 0 auto; padding: 1.75rem 1.5rem 4rem; }

/* Category sections */
.calc-cat-section { margin-bottom: 3rem; }
.calc-cat-header {
  display: flex; align-items: center; gap: .75rem;
  margin-bottom: 1.25rem; padding-bottom: .75rem;
  border-bottom: 2px solid var(--border);
}
.calc-cat-icon {
  font-size: 1.5rem; width: 44px; height: 44px;
  display: flex; align-items: center; justify-content: center;
  border-radius: 10px; flex-shrink: 0;
}
.calc-cat-info h2 { font-size: 1.15rem; font-weight: 700; margin: 0 0 .1rem; }
.calc-cat-info p { font-size: .8rem; color: var(--text3); margin: 0; }
.calc-cat-count {
  margin-left: auto; font-size: .75rem; font-weight: 700;
  color: var(--text3); background: var(--bg2);
  border: 1px solid var(--border); border-radius: 999px;
  padding: .2rem .7rem; white-space: nowrap;
}

/* Directory card grid */
.calc-dir-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1rem;
}
.calc-dir-card {
  background: var(--surface);
  border: 1.5px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem;
  display: flex; flex-direction: column; gap: .75rem;
  text-decoration: none; color: inherit;
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
  position: relative; overflow: hidden;
}
.calc-dir-card::before {
  content: '';
  position: absolute; inset: 0;
  background: linear-gradient(135deg, var(--accent-glow), transparent 70%);
  opacity: 0; transition: opacity var(--transition); pointer-events: none;
}
.calc-dir-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--accent);
  text-decoration: none;
}
.calc-dir-card:hover::before { opacity: 1; }
.card-dir-icon {
  width: 48px; height: 48px; border-radius: 12px;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.5rem; flex-shrink: 0;
}
.card-dir-body { flex: 1; display: flex; flex-direction: column; gap: .3rem; }
.card-dir-body h3 {
  font-size: .95rem; font-weight: 700; margin: 0;
  color: var(--text); line-height: 1.3;
}
.card-dir-body p { font-size: .8rem; color: var(--text2); line-height: 1.5; margin: 0; }
.card-dir-footer {
  display: flex; align-items: center;
  justify-content: space-between; margin-top: auto;
}
.card-dir-badge {
  display: inline-block; font-size: .68rem; font-weight: 700;
  letter-spacing: .05em; text-transform: uppercase;
  background: var(--bg2); border: 1px solid var(--border);
  color: var(--text3); border-radius: 999px; padding: .18rem .55rem;
}
.card-dir-btn {
  display: inline-flex; align-items: center; gap: .3rem;
  font-size: .76rem; font-weight: 700; color: var(--accent);
  background: var(--accent-glow); border: 1px solid var(--accent);
  border-radius: var(--radius-sm); padding: .3rem .7rem;
  text-decoration: none; transition: all var(--transition); white-space: nowrap;
}
.calc-dir-card:hover .card-dir-btn { background: var(--accent); color: #fff; }
.calc-dir-card[hidden] { display: none; }
.calc-cat-section[hidden] { display: none; }
.calc-dir-no-results { text-align: center; color: var(--text3); font-size: 1rem; padding: 3rem 1rem; display: none; }
.calc-dir-no-results.show { display: block; }

/* Directory responsive */
@media (max-width: 1100px) { .calc-dir-grid { grid-template-columns: repeat(3, 1fr); } }
@media (max-width: 860px) {
  .calc-dir-grid { grid-template-columns: repeat(3, 1fr); }
  .calc-dir-controls { flex-direction: column; align-items: stretch; }
  .calc-dir-search-wrap { max-width: 100%; }
}
@media (max-width: 640px) {
  .calc-dir-hero { padding: 2rem 1rem 1.75rem; }
  .calc-dir-title { font-size: 1.6rem; }
  .calc-dir-subtitle { font-size: .9rem; margin-bottom: 1.25rem; }
  .calc-dir-stats { gap: 1.25rem; }
  .calc-dir-stat strong { font-size: 1.2rem; }
  .calc-dir-controls { padding: 1.25rem 1rem 0; }
  .calc-dir-main { padding: 1.25rem 1rem 3rem; }
  .calc-dir-grid { grid-template-columns: repeat(2, 1fr); gap: .75rem; }
  .calc-dir-card { padding: 1rem; }
  .card-dir-icon { width: 40px; height: 40px; font-size: 1.25rem; }
  .card-dir-body h3 { font-size: .85rem; }
  .card-dir-body p { display: none; }
  .card-dir-badge { display: none; }
  .card-dir-btn { font-size: .72rem; padding: .28rem .55rem; }
  .calc-cat-info h2 { font-size: 1rem; }
  .filter-pill { font-size: .76rem; padding: .38rem .8rem; }
}
@media (max-width: 400px) {
  .calc-dir-grid { gap: .6rem; }
  .card-dir-footer { flex-direction: column; align-items: flex-start; gap: .4rem; }
}

/* ══════════════════════════════════════════
   INDIVIDUAL CALCULATOR PAGES
══════════════════════════════════════════ */
.calc-page-wrap {
  max-width: 1280px; margin: 0 auto; padding: 2rem 1.5rem 4rem;
}
.calc-page-breadcrumb {
  display: flex; align-items: center; gap: .4rem;
  font-size: .82rem; color: var(--text3);
  margin-bottom: 1.5rem; flex-wrap: wrap;
}
.calc-page-breadcrumb a { color: var(--accent); text-decoration: none; }
.calc-page-breadcrumb a:hover { text-decoration: underline; }
.calc-page-hero {
  display: flex; gap: 1.5rem; align-items: flex-start;
  margin-bottom: 2.5rem; flex-wrap: wrap;
}
.calc-page-icon {
  width: 72px; height: 72px; border-radius: 18px;
  display: flex; align-items: center; justify-content: center;
  font-size: 2.2rem; flex-shrink: 0;
}
.calc-page-info h1 { font-size: clamp(1.5rem, 3vw, 2.2rem); margin-bottom: .4rem; }
.calc-page-info p { font-size: 1rem; color: var(--text2); max-width: 600px; margin: 0; }
.calc-page-badge {
  display: inline-block; margin-top: .6rem;
  font-size: .72rem; font-weight: 700; letter-spacing: .05em;
  text-transform: uppercase; background: var(--accent-glow);
  border: 1px solid var(--accent); color: var(--accent);
  border-radius: 999px; padding: .25rem .75rem;
}
.calc-page-body {
  display: grid; grid-template-columns: 380px 1fr;
  gap: 2rem; align-items: start;
}
/* Input card */
.calc-input-card {
  background: var(--surface); border: 1.5px solid var(--border);
  border-radius: var(--radius); padding: 1.75rem;
  position: sticky; top: calc(var(--header-h) + 1rem);
}
.calc-input-card h2 {
  font-size: 1.05rem; font-weight: 700;
  margin-bottom: 1.25rem; padding-bottom: .75rem;
  border-bottom: 1px solid var(--border);
}
.calc-input-card .form-group { display: flex; flex-direction: column; gap: .4rem; margin-bottom: .85rem; }
.calc-input-card .form-group label { font-size: .85rem; font-weight: 600; color: var(--text2); }
.calc-input-card .form-group input,
.calc-input-card .form-group select {
  padding: .75rem 1rem;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--bg2); color: var(--text);
  font-family: 'JetBrains Mono', monospace;
  font-size: 1rem; outline: none; width: 100%;
  transition: border-color var(--transition);
}
.calc-input-card .form-group input:focus,
.calc-input-card .form-group select:focus { border-color: var(--accent); }
/* Results panel */
.result-panel {
  display: none; background: var(--bg2);
  border: 1.5px solid var(--border); border-radius: var(--radius);
  padding: 1.25rem; margin-top: 1rem;
  animation: fadeUp .3s ease both;
}
.result-panel.show { display: block; }
.result-panel h3 {
  font-size: .9rem; margin-bottom: .85rem; color: var(--text3);
  text-transform: uppercase; letter-spacing: .06em;
}
.result-grid { display: grid; grid-template-columns: 1fr 1fr; gap: .75rem; }
.result-item {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius-sm); padding: .75rem 1rem;
}
.result-label {
  display: block; font-size: .72rem; color: var(--text3);
  font-weight: 600; text-transform: uppercase;
  letter-spacing: .05em; margin-bottom: .25rem;
}
.result-value {
  font-family: 'JetBrains Mono', monospace; font-size: 1.1rem; font-weight: 700;
}
/* Content area */
.calc-page-content { display: flex; flex-direction: column; gap: 2rem; }
.formula-section {
  background: var(--bg2); border: 1.5px solid var(--border);
  border-left: 3px solid var(--accent);
  border-radius: var(--radius-sm); padding: 1.1rem 1.25rem;
}
.formula-section h3 {
  font-size: .8rem; font-weight: 700; text-transform: uppercase;
  letter-spacing: .07em; color: var(--accent); margin-bottom: .6rem;
}
.formula-section pre {
  font-family: 'JetBrains Mono', monospace; font-size: .82rem;
  color: var(--text2); line-height: 1.8; white-space: pre-wrap; margin: 0;
}
/* FAQ on calc pages */
.faq-section h2 { font-size: 1.15rem; font-weight: 700; margin-bottom: 1rem; }
/* Related calculators */
.related-section h2 {
  font-size: 1.05rem; font-weight: 700; margin-bottom: 1rem;
  color: var(--text3); text-transform: uppercase; letter-spacing: .06em;
}
.related-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: .75rem; }
.related-grid a {
  background: var(--surface); border: 1.5px solid var(--border);
  border-radius: var(--radius); padding: .9rem 1rem;
  text-decoration: none; display: flex; flex-direction: column; gap: .3rem;
  font-size: .85rem; font-weight: 700; color: var(--text);
  transition: all var(--transition);
}
.related-grid a:hover { border-color: var(--accent); transform: translateY(-2px); text-decoration: none; }
/* Calc page responsive */
@media (max-width: 900px) {
  .calc-page-body { grid-template-columns: 1fr; }
  .calc-input-card { position: static; }
  .related-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 600px) {
  .calc-page-wrap { padding: 1.25rem 1rem 3rem; }
  .result-grid { grid-template-columns: 1fr; }
  .calc-page-hero { gap: 1rem; }
  .calc-page-icon { width: 56px; height: 56px; font-size: 1.7rem; }
}

/* ══════════════════════════════════════════
   NUMVEXA RESULT MODAL SYSTEM
   Appended below all existing styles — safe, no overrides above this line
══════════════════════════════════════════ */

/* ── Overlay ── */
.nv-modal-overlay {
  position: fixed;
  inset: 0;
  z-index: 9000;
  background: rgba(10, 15, 30, 0.72);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.28s cubic-bezier(0.4, 0, 0.2, 1);
}
.nv-modal-overlay.nv-open {
  opacity: 1;
  pointer-events: all;
}

/* ── Modal Box ── */
.nv-modal {
  position: relative;
  width: 100%;
  max-width: 650px;
  max-height: 90vh;
  overflow-y: auto;
  background: var(--surface);
  border: 1.5px solid var(--border);
  border-radius: 20px;
  box-shadow:
    0 24px 80px rgba(0, 0, 0, 0.28),
    0 0 0 1px rgba(99, 102, 241, 0.12),
    inset 0 1px 0 rgba(255, 255, 255, 0.06);
  transform: scale(0.88) translateY(24px);
  transition: transform 0.3s cubic-bezier(0.34, 1.56, 0.64, 1), opacity 0.28s ease;
  opacity: 0;
}
.nv-modal-overlay.nv-open .nv-modal {
  transform: scale(1) translateY(0);
  opacity: 1;
}

/* Scrollbar inside modal */
.nv-modal::-webkit-scrollbar { width: 5px; }
.nv-modal::-webkit-scrollbar-track { background: transparent; }
.nv-modal::-webkit-scrollbar-thumb { background: var(--border); border-radius: 99px; }

/* ── Modal Header ── */
.nv-modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.4rem 1.6rem 1rem;
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  background: var(--surface);
  border-radius: 20px 20px 0 0;
  z-index: 2;
}
.nv-modal-title-group {
  display: flex;
  align-items: center;
  gap: .75rem;
}
.nv-modal-emoji {
  font-size: 1.6rem;
  line-height: 1;
}
.nv-modal-title {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text);
  line-height: 1.2;
}
.nv-modal-subtitle {
  font-size: .75rem;
  color: var(--text3);
  margin-top: .15rem;
}
.nv-modal-close {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  border: 1.5px solid var(--border);
  background: var(--bg2);
  color: var(--text2);
  font-size: 1rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.18s ease;
  flex-shrink: 0;
  line-height: 1;
}
.nv-modal-close:hover {
  background: var(--red);
  border-color: var(--red);
  color: #fff;
  transform: rotate(90deg);
}

/* ── Modal Body ── */
.nv-modal-body {
  padding: 1.5rem 1.6rem;
}

/* ── Hero Result ── */
.nv-result-hero {
  background: linear-gradient(135deg, var(--accent) 0%, var(--accent2) 100%);
  border-radius: 14px;
  padding: 1.5rem 1.75rem;
  text-align: center;
  margin-bottom: 1.25rem;
  position: relative;
  overflow: hidden;
}
.nv-result-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 30% 50%, rgba(255,255,255,0.15) 0%, transparent 70%);
  pointer-events: none;
}
.nv-result-hero-label {
  font-size: .72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .1em;
  color: rgba(255,255,255,0.75);
  margin-bottom: .4rem;
}
.nv-result-hero-value {
  font-family: 'JetBrains Mono', monospace;
  font-size: clamp(1.8rem, 5vw, 2.6rem);
  font-weight: 700;
  color: #fff;
  line-height: 1.1;
}
.nv-result-hero-note {
  font-size: .75rem;
  color: rgba(255,255,255,0.65);
  margin-top: .4rem;
}

/* ── Result Grid Cards ── */
.nv-result-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: .75rem;
  margin-bottom: 1.25rem;
}
.nv-result-card {
  background: var(--bg2);
  border: 1.5px solid var(--border);
  border-radius: 12px;
  padding: 1rem 1.15rem;
  transition: border-color 0.18s ease, box-shadow 0.18s ease;
}
.nv-result-card:hover {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow);
}
.nv-result-card-label {
  font-size: .68rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .07em;
  color: var(--text3);
  margin-bottom: .35rem;
  display: block;
}
.nv-result-card-value {
  font-family: 'JetBrains Mono', monospace;
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text);
  line-height: 1.2;
}
.nv-result-card-value.is-green  { color: var(--green); }
.nv-result-card-value.is-red    { color: var(--red); }
.nv-result-card-value.is-amber  { color: var(--amber); }
.nv-result-card-value.is-accent { color: var(--accent); }
.nv-result-card.nv-full { grid-column: 1 / -1; }

/* ── Formula Note ── */
.nv-modal-note {
  background: var(--accent-glow);
  border: 1px solid rgba(99,102,241,0.25);
  border-radius: 10px;
  padding: .8rem 1rem;
  font-size: .78rem;
  color: var(--text2);
  line-height: 1.6;
  margin-bottom: 1.25rem;
}
.nv-modal-note strong { color: var(--accent); }

/* ── Action Buttons Row ── */
.nv-modal-actions {
  display: flex;
  gap: .65rem;
  flex-wrap: wrap;
}
.nv-btn {
  display: inline-flex;
  align-items: center;
  gap: .4rem;
  padding: .65rem 1.2rem;
  border-radius: 10px;
  font-family: 'Sora', sans-serif;
  font-size: .85rem;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: all 0.18s ease;
  white-space: nowrap;
  text-decoration: none;
}
.nv-btn-primary {
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  color: #fff;
  box-shadow: 0 4px 16px rgba(99,102,241,.35);
  flex: 1;
  justify-content: center;
}
.nv-btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 24px rgba(99,102,241,.45);
}
.nv-btn-ghost {
  background: var(--bg2);
  border: 1.5px solid var(--border);
  color: var(--text2);
}
.nv-btn-ghost:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--accent-glow);
}
.nv-btn-copy {
  background: var(--bg2);
  border: 1.5px solid var(--border);
  color: var(--text2);
}
.nv-btn-copy.copied {
  border-color: var(--green);
  color: var(--green);
  background: rgba(16,185,129,0.1);
}

/* ── Mobile ── */
@media (max-width: 520px) {
  .nv-modal-overlay { padding: .5rem; }
  .nv-modal { border-radius: 16px; max-height: 95vh; }
  .nv-modal-header { padding: 1.1rem 1.2rem .8rem; }
  .nv-modal-body { padding: 1.1rem 1.2rem; }
  .nv-result-hero-value { font-size: 1.9rem; }
  .nv-result-grid { grid-template-columns: 1fr; }
  .nv-modal-actions { flex-direction: column; }
  .nv-btn { width: 100%; justify-content: center; }
}
/* ── End of Numvexa Result Modal System ── */

/* ══════════════════════════════════════════
   NUMVEXA RESULT MODAL SYSTEM
   Append this block to the END of style.css
══════════════════════════════════════════ */

/* ── Overlay ── */
.nv-modal-overlay {
  position: fixed;
  inset: 0;
  z-index: 9000;
  background: rgba(10, 15, 30, 0.72);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.28s cubic-bezier(0.4, 0, 0.2, 1);
}
.nv-modal-overlay.nv-open {
  opacity: 1;
  pointer-events: all;
}

/* ── Modal Box ── */
.nv-modal {
  position: relative;
  width: 100%;
  max-width: 650px;
  max-height: 90vh;
  overflow-y: auto;
  background: var(--surface);
  border: 1.5px solid var(--border);
  border-radius: 20px;
  box-shadow:
    0 24px 80px rgba(0, 0, 0, 0.28),
    0 0 0 1px rgba(99, 102, 241, 0.12),
    inset 0 1px 0 rgba(255, 255, 255, 0.06);
  transform: scale(0.88) translateY(24px);
  transition: transform 0.3s cubic-bezier(0.34, 1.56, 0.64, 1), opacity 0.28s ease;
  opacity: 0;
  /* Glassmorphism accent */
  background: linear-gradient(
    145deg,
    var(--surface) 0%,
    color-mix(in srgb, var(--surface) 95%, var(--accent)) 100%
  );
}
.nv-modal-overlay.nv-open .nv-modal {
  transform: scale(1) translateY(0);
  opacity: 1;
}

/* Scrollbar inside modal */
.nv-modal::-webkit-scrollbar { width: 5px; }
.nv-modal::-webkit-scrollbar-track { background: transparent; }
.nv-modal::-webkit-scrollbar-thumb { background: var(--border); border-radius: 99px; }

/* ── Modal Header ── */
.nv-modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.4rem 1.6rem 1rem;
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  background: inherit;
  border-radius: 20px 20px 0 0;
  z-index: 2;
}
.nv-modal-title-group {
  display: flex;
  align-items: center;
  gap: .75rem;
}
.nv-modal-emoji {
  font-size: 1.6rem;
  line-height: 1;
}
.nv-modal-title {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text);
  line-height: 1.2;
}
.nv-modal-subtitle {
  font-size: .75rem;
  color: var(--text3);
  margin-top: .15rem;
}
.nv-modal-close {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  border: 1.5px solid var(--border);
  background: var(--bg2);
  color: var(--text2);
  font-size: 1rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.18s ease;
  flex-shrink: 0;
  line-height: 1;
}
.nv-modal-close:hover {
  background: var(--red);
  border-color: var(--red);
  color: #fff;
  transform: rotate(90deg);
}

/* ── Hero Result (primary highlight) ── */
.nv-modal-body {
  padding: 1.5rem 1.6rem;
}
.nv-result-hero {
  background: linear-gradient(135deg, var(--accent) 0%, var(--accent2) 100%);
  border-radius: 14px;
  padding: 1.5rem 1.75rem;
  text-align: center;
  margin-bottom: 1.25rem;
  position: relative;
  overflow: hidden;
}
.nv-result-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 30% 50%, rgba(255,255,255,0.15) 0%, transparent 70%);
}
.nv-result-hero-label {
  font-size: .72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .1em;
  color: rgba(255,255,255,0.75);
  margin-bottom: .4rem;
}
.nv-result-hero-value {
  font-family: 'JetBrains Mono', monospace;
  font-size: clamp(1.8rem, 5vw, 2.6rem);
  font-weight: 700;
  color: #fff;
  line-height: 1.1;
}
.nv-result-hero-note {
  font-size: .75rem;
  color: rgba(255,255,255,0.65);
  margin-top: .4rem;
}

/* ── Result Grid Cards ── */
.nv-result-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: .75rem;
  margin-bottom: 1.25rem;
}
.nv-result-card {
  background: var(--bg2);
  border: 1.5px solid var(--border);
  border-radius: 12px;
  padding: 1rem 1.15rem;
  transition: border-color 0.18s ease, box-shadow 0.18s ease;
}
.nv-result-card:hover {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow);
}
.nv-result-card-label {
  font-size: .68rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .07em;
  color: var(--text3);
  margin-bottom: .35rem;
  display: block;
}
.nv-result-card-value {
  font-family: 'JetBrains Mono', monospace;
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text);
  line-height: 1.2;
}
.nv-result-card-value.is-green { color: var(--green); }
.nv-result-card-value.is-red   { color: var(--red); }
.nv-result-card-value.is-amber { color: var(--amber); }
.nv-result-card-value.is-accent { color: var(--accent); }
/* full-width card variant */
.nv-result-card.nv-full { grid-column: 1 / -1; }

/* ── Formula Note (optional inline) ── */
.nv-modal-note {
  background: color-mix(in srgb, var(--accent-glow) 60%, transparent);
  border: 1px solid color-mix(in srgb, var(--accent) 25%, transparent);
  border-radius: 10px;
  padding: .8rem 1rem;
  font-size: .78rem;
  color: var(--text2);
  line-height: 1.6;
  margin-bottom: 1.25rem;
}
.nv-modal-note strong { color: var(--accent); }

/* ── Action Buttons Row ── */
.nv-modal-actions {
  display: flex;
  gap: .65rem;
  flex-wrap: wrap;
}
.nv-btn {
  display: inline-flex;
  align-items: center;
  gap: .4rem;
  padding: .65rem 1.2rem;
  border-radius: 10px;
  font-family: 'Sora', sans-serif;
  font-size: .85rem;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: all 0.18s ease;
  white-space: nowrap;
  text-decoration: none;
}
.nv-btn-primary {
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  color: #fff;
  box-shadow: 0 4px 16px rgba(99,102,241,.35);
  flex: 1;
  justify-content: center;
}
.nv-btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 24px rgba(99,102,241,.45);
}
.nv-btn-ghost {
  background: var(--bg2);
  border: 1.5px solid var(--border);
  color: var(--text2);
}
.nv-btn-ghost:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--accent-glow);
}
.nv-btn-copy {
  background: var(--bg2);
  border: 1.5px solid var(--border);
  color: var(--text2);
}
.nv-btn-copy.copied {
  border-color: var(--green);
  color: var(--green);
  background: color-mix(in srgb, var(--green) 12%, var(--bg2));
}

/* ── Mobile ── */
@media (max-width: 520px) {
  .nv-modal-overlay { padding: .5rem; }
  .nv-modal { border-radius: 16px; max-height: 95vh; }
  .nv-modal-header { padding: 1.1rem 1.2rem .8rem; }
  .nv-modal-body { padding: 1.1rem 1.2rem; }
  .nv-result-hero-value { font-size: 1.9rem; }
  .nv-result-grid { grid-template-columns: 1fr; }
  .nv-modal-actions { flex-direction: column; }
  .nv-btn { width: 100%; justify-content: center; }
}