/* ===== RESET & BASE ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body { font-family: 'Inter', sans-serif; background: #F7F9FC; color: #1a202c; line-height: 1.6; }
a { text-decoration: none; color: inherit; }
img { max-width: 100%; }

/* ===== CSS VARIABLES ===== */
:root {
  --navy: #0F2044;
  --navy-light: #162a57;
  --teal: #0E9B8A;
  --teal-light: #0ec4ae;
  --amber: #F59E0B;
  --off-white: #F7F9FC;
  --slate: #4A5568;
  --border: #E2E8F0;
  --muted: #718096;
}

/* ===== NAVBAR ===== */
.navbar {
  background: linear-gradient(90deg, #0a1628 0%, #0F2044 60%, #0c2d3a 100%);
  position: sticky;
  top: 0;
  z-index: 1000;
  box-shadow: 0 1px 0 rgba(255,255,255,0.06), 0 4px 24px rgba(0,0,0,0.28);
  border-bottom: 1px solid rgba(14,155,138,0.15);
}
.navbar-inner {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 28px;
  height: 68px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

/* ── Logo ── */
.nav-logo {
  display: flex;
  align-items: center;
  gap: 11px;
  text-decoration: none;
  flex-shrink: 0;
}
.nav-logo-icon {
  width: 38px; height: 38px;
  flex-shrink: 0;
  filter: drop-shadow(0 2px 6px rgba(14,196,174,0.35));
  transition: filter .25s, transform .25s;
}
.nav-logo:hover .nav-logo-icon {
  filter: drop-shadow(0 3px 10px rgba(14,196,174,0.55));
  transform: scale(1.06);
}
.nav-logo-text {
  line-height: 1;
  font-family: 'DM Sans', sans-serif;
}
.nav-logo-name {
  font-size: 17px;
  font-weight: 800;
  color: #ffffff;
  letter-spacing: -0.3px;
}
.nav-logo-dot {
  font-size: 17px;
  font-weight: 700;
  color: rgba(255,255,255,0.55);
  letter-spacing: -0.3px;
}
.nav-logo-tld {
  font-size: 17px;
  font-weight: 800;
  color: var(--teal);
  letter-spacing: -0.3px;
}

/* ── Nav Links ── */
.nav-links {
  display: flex;
  align-items: center;
  gap: 8px;
}
.nav-link {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 7px 13px;
  border-radius: 9px;
  color: #b8cfe8;
  font-size: 13.5px;
  font-weight: 500;
  text-decoration: none;
  transition: background .18s, color .18s;
  letter-spacing: 0.01em;
  white-space: nowrap;
}
.nav-link i {
  font-size: 15px;
  opacity: 0.75;
  transition: opacity .18s;
}
.nav-link:hover {
  background: rgba(255,255,255,0.08);
  color: #ffffff;
}
.nav-link:hover i { opacity: 1; }
.nav-link.active {
  background: rgba(14,155,138,0.15);
  color: var(--teal-light, #0ec4ae);
  font-weight: 600;
}
.nav-link.active i { opacity: 1; color: var(--teal-light, #0ec4ae); }

/* CTA button in nav */
.nav-cta {
  display: flex;
  align-items: center;
  gap: 7px;
  padding: 8px 16px;
  background: var(--teal);
  color: #ffffff !important;
  border-radius: 10px;
  font-size: 13.5px;
  font-weight: 700;
  margin-left: 8px;
  text-decoration: none;
  transition: background .18s, transform .15s, box-shadow .18s;
  box-shadow: 0 2px 10px rgba(14,155,138,0.35);
  letter-spacing: 0.01em;
  white-space: nowrap;
}
.nav-cta i { font-size: 16px; }
.nav-cta:hover {
  background: var(--teal-light, #0ec4ae);
  transform: translateY(-1px);
  box-shadow: 0 4px 16px rgba(14,155,138,0.5);
}

/* ── Right controls ── */
.nav-controls {
  display: flex;
  align-items: center;
  gap: 8px;
}




/* ── Hamburger ── */
.nav-toggle {
  display: none;
  background: rgba(255,255,255,0.07);
  border: 1px solid rgba(255,255,255,0.15);
  border-radius: 9px;
  cursor: pointer;
  padding: 0;
  width: 38px; height: 38px;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
}
.nav-toggle span {
  display: block;
  width: 20px;
  height: 2px;
  background: white;
  border-radius: 2px;
  transition: .3s;
}

/* ── Mobile menu ── */
.nav-mobile {
  display: none;
  background: #0a1628;
  border-top: 1px solid rgba(14,155,138,0.15);
  padding: 12px 20px 16px;
}
.nav-mobile-link {
  display: flex;
  align-items: center;
  gap: 10px;
  color: #b8cfe8;
  font-size: 14px;
  font-weight: 500;
  padding: 11px 12px;
  border-radius: 9px;
  text-decoration: none;
  transition: background .18s, color .18s;
  margin-bottom: 2px;
}
.nav-mobile-link i { font-size: 17px; opacity: 0.7; }
.nav-mobile-link:hover { background: rgba(255,255,255,0.07); color: white; }
.nav-mobile-link:hover i { opacity: 1; }
.nav-mobile-cta {
  display: flex;
  align-items: center;
  gap: 10px;
  background: var(--teal);
  color: white !important;
  font-size: 14px;
  font-weight: 700;
  padding: 12px 16px;
  border-radius: 10px;
  text-decoration: none;
  margin-top: 8px;
  transition: background .18s;
}
.nav-mobile-cta:hover { background: #0ec4ae; }

/* ===== HERO ===== */
.hero {
  background: linear-gradient(135deg, #0F2044 0%, #162a57 55%, #0c3545 100%);
  padding: 80px 24px 90px;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute;
  top: -80px; right: -80px;
  width: 280px; height: 280px;
  border-radius: 50%;
  background: var(--teal);
  opacity: 0.07;
}
.hero::after {
  content: '';
  position: absolute;
  bottom: -60px; left: -60px;
  width: 200px; height: 200px;
  border-radius: 50%;
  background: var(--amber);
  opacity: 0.07;
}
.hero-inner { position: relative; z-index: 1; max-width: 760px; margin: 0 auto; }
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(14,155,138,0.15);
  color: var(--teal);
  border: 1px solid rgba(14,155,138,0.3);
  border-radius: 999px;
  padding: 6px 18px;
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 24px;
}
.badge-dot {
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--teal);
  animation: pulse 1.6s infinite;
}
@keyframes pulse { 0%,100%{opacity:1} 50%{opacity:.3} }
.hero h1 {
  color: white;
  font-size: clamp(32px, 5vw, 52px);
  font-weight: 800;
  line-height: 1.15;
  margin-bottom: 20px;
  font-family: 'DM Sans', sans-serif;
}
.hero h1 .teal { color: var(--teal); }
.hero-desc {
  color: #a0aec0;
  font-size: 17px;
  max-width: 560px;
  margin: 0 auto 36px;
  line-height: 1.75;
}
.hero-btns { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; margin-bottom: 48px; }
.btn-primary {
  background: var(--teal);
  color: white;
  border: none;
  padding: 14px 28px;
  border-radius: 12px;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  transition: opacity .2s, transform .2s;
}
.btn-primary:hover { opacity: 0.9; transform: translateY(-1px); }
.btn-outline {
  background: rgba(255,255,255,0.07);
  color: #e2e8f0;
  border: 1px solid rgba(255,255,255,0.22);
  padding: 14px 28px;
  border-radius: 12px;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  transition: background .2s;
}
.btn-outline:hover { background: rgba(255,255,255,0.12); }
.hero-stats { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }
.hero-stat {
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: 14px;
  padding: 14px 20px;
  display: flex;
  align-items: center;
  gap: 12px;
  min-width: 190px;
}
.hero-stat-icon { color: var(--teal); font-size: 22px; }
.hero-stat-val { color: white; font-size: 13px; font-weight: 600; }
.hero-stat-lbl { color: var(--muted); font-size: 11px; }

/* ===== SECTIONS ===== */
.section { padding: 72px 24px; }
.section-white { background: white; }
.section-gray { background: var(--off-white); }
.section-dark { background: var(--navy); }
.container { max-width: 1000px; margin: 0 auto; }
.section-header { text-align: center; margin-bottom: 48px; }
.eyebrow {
  display: inline-block;
  background: rgba(14,155,138,0.12);
  color: var(--teal);
  border-radius: 999px;
  padding: 5px 16px;
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .09em;
  margin-bottom: 12px;
}
.eyebrow-dark { background: rgba(15,32,68,0.08); color: var(--navy); }
.section-title {
  font-size: clamp(24px, 3.5vw, 34px);
  font-weight: 800;
  color: var(--navy);
  margin-bottom: 10px;
  font-family: 'DM Sans', sans-serif;
}
.section-sub { color: var(--slate); font-size: 15px; max-width: 520px; margin: 0 auto; line-height: 1.7; }

/* ===== CALCULATOR ===== */
.calc-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 28px; }
.card {
  background: white;
  border-radius: 20px;
  border: 1px solid var(--border);
  overflow: hidden;
}
.card-body { padding: 28px; }
.card-title { font-size: 16px; font-weight: 700; color: var(--navy); margin-bottom: 22px; font-family: 'DM Sans', sans-serif; }
.field-group { margin-bottom: 18px; }
.field-label { display: block; font-size: 13px; font-weight: 600; color: var(--slate); margin-bottom: 7px; }
.field {
  width: 100%;
  border: 1px solid var(--border);
  border-radius: 11px;
  padding: 11px 15px;
  font-size: 14px;
  color: #1a202c;
  background: #FAFBFC;
  outline: none;
  font-family: 'Inter', sans-serif;
  transition: border-color .2s, box-shadow .2s;
}
.field:focus { border-color: var(--teal); box-shadow: 0 0 0 3px rgba(14,155,138,0.14); }
.shift-options { display: flex; flex-direction: column; gap: 7px; }
.shift-btn {
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 10px 14px;
  border-radius: 11px;
  border: 1px solid var(--border);
  background: #FAFBFC;
  font-size: 13px;
  font-weight: 500;
  color: var(--slate);
  cursor: pointer;
  transition: all .15s;
  font-family: 'Inter', sans-serif;
}
.shift-btn:hover { border-color: var(--teal); color: var(--teal); }
.shift-btn.active { border-color: var(--teal); background: rgba(14,155,138,0.08); color: var(--teal); }
.shift-pct {
  font-size: 11px;
  padding: 2px 9px;
  border-radius: 999px;
  font-weight: 700;
}
.pct-active { background: var(--teal); color: white; }
.pct-inactive { background: #E2E8F0; color: var(--slate); }
.calc-actions { display: flex; gap: 10px; margin-top: 20px; }
.btn-calc {
  flex: 1;
  background: var(--teal);
  color: white;
  border: none;
  border-radius: 11px;
  padding: 12px;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 7px;
  font-family: 'Inter', sans-serif;
  transition: opacity .2s;
}
.btn-calc:hover { opacity: 0.9; }
.btn-reset {
  padding: 12px 16px;
  border-radius: 11px;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--slate);
  font-size: 13px;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 6px;
  font-family: 'Inter', sans-serif;
  transition: background .2s;
}
.btn-reset:hover { background: #f0f0f0; }

/* Result card */
.result-header { background: var(--navy); padding: 16px 22px; }
.result-header-title { color: white; font-weight: 700; font-size: 15px; font-family: 'DM Sans', sans-serif; }
.result-header-sub { color: #a0aec0; font-size: 12px; margin-top: 2px; }
.result-body { padding: 22px; }
.result-effective {
  background: rgba(14,155,138,0.08);
  border: 1px solid rgba(14,155,138,0.22);
  border-radius: 13px;
  padding: 16px;
  margin-bottom: 18px;
}
.eff-label { font-size: 11px; font-weight: 700; text-transform: uppercase; letter-spacing: .08em; color: var(--teal); margin-bottom: 5px; }
.eff-value { font-size: 30px; font-weight: 800; color: var(--navy); font-family: 'DM Sans', sans-serif; }
.eff-value span { font-size: 14px; font-weight: 400; color: var(--muted); }
.eff-sub { font-size: 12px; color: var(--teal); margin-top: 3px; }
.result-row { display: flex; justify-content: space-between; align-items: center; padding: 9px 0; border-top: 1px solid var(--border); }
.result-row-label { font-size: 13px; font-weight: 500; color: var(--navy); }
.result-row-val { font-size: 13px; font-weight: 700; color: #1a202c; }
.result-row-val.net { color: var(--teal); font-size: 17px; }
.result-row-val.neg { color: #e53e3e; }
.proj-box { background: var(--off-white); border: 1px solid var(--border); border-radius: 13px; padding: 16px; margin-top: 14px; }
.proj-title { font-size: 10px; font-weight: 700; text-transform: uppercase; letter-spacing: .08em; color: var(--slate); margin-bottom: 12px; }
.proj-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.proj-item-lbl { font-size: 11px; color: var(--muted); }
.proj-item-val { font-size: 15px; font-weight: 800; color: var(--navy); font-family: 'DM Sans', sans-serif; }
.result-empty { display: flex; flex-direction: column; align-items: center; justify-content: center; min-height: 380px; text-align: center; padding: 32px; }
.result-empty-icon { width: 64px; height: 64px; border-radius: 50%; background: rgba(14,155,138,0.1); display: flex; align-items: center; justify-content: center; margin-bottom: 16px; }
.result-empty-title { font-size: 17px; font-weight: 700; color: var(--navy); margin-bottom: 6px; font-family: 'DM Sans', sans-serif; }
.result-empty-sub { font-size: 13px; color: var(--muted); }

/* ===== FORMULA ===== */
.formula-dark { background: var(--navy); border-radius: 20px; padding: 32px; margin-bottom: 28px; }
.formula-label { font-size: 11px; font-weight: 700; text-transform: uppercase; letter-spacing: .1em; color: var(--teal); text-align: center; margin-bottom: 18px; }
.formula-boxes { display: grid; grid-template-columns: 1fr auto 1fr; gap: 14px; align-items: center; }
.formula-box { background: rgba(255,255,255,0.07); border-radius: 13px; padding: 16px; text-align: center; }
.formula-box-lbl { font-size: 11px; color: #a0aec0; margin-bottom: 7px; }
.formula-box-code { font-family: 'Courier New', monospace; font-size: 13px; font-weight: 700; color: var(--amber); }
.formula-plus { font-size: 24px; font-weight: 700; color: var(--teal); text-align: center; }
.formula-result { text-align: center; margin-top: 18px; }
.formula-result-inner {
  display: inline-block;
  background: rgba(14,155,138,0.2);
  border: 1px solid rgba(14,155,138,0.4);
  border-radius: 11px;
  padding: 9px 28px;
  color: white;
  font-size: 14px;
  font-weight: 600;
}
.methods-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; margin-bottom: 28px; }
.method-card { border: 1px solid var(--border); border-radius: 18px; padding: 22px; background: white; }
.method-icon { width: 42px; height: 42px; border-radius: 13px; display: flex; align-items: center; justify-content: center; margin-bottom: 14px; font-size: 20px; }
.icon-teal { background: rgba(14,155,138,0.12); color: var(--teal); }
.icon-amber { background: rgba(245,158,11,0.12); color: var(--amber); }
.method-title { font-size: 15px; font-weight: 700; color: var(--navy); margin-bottom: 7px; font-family: 'DM Sans', sans-serif; }
.method-desc { font-size: 13px; color: var(--slate); margin-bottom: 12px; line-height: 1.6; }
.code-box { background: var(--off-white); border-radius: 11px; padding: 14px; font-family: 'Courier New', monospace; font-size: 12px; color: var(--navy); line-height: 1.8; }
.code-teal { color: var(--teal); font-weight: 700; }
.code-amber { color: var(--amber); font-weight: 700; }

/* ===== TABLE ===== */
.table-wrap { border: 1px solid var(--border); border-radius: 18px; overflow: hidden; }
table { width: 100%; border-collapse: collapse; font-size: 14px; }
thead tr { background: var(--navy); }
thead th { padding: 13px 18px; text-align: left; font-size: 11px; font-weight: 600; text-transform: uppercase; letter-spacing: .07em; color: #a0aec0; }
tbody tr { border-top: 1px solid var(--border); }
tbody tr:nth-child(even) { background: #FAFBFC; }
td { padding: 12px 18px; color: var(--slate); }
td:first-child { color: var(--navy); font-weight: 600; }
.badge-pill { display: inline-block; padding: 3px 11px; border-radius: 999px; font-size: 11px; font-weight: 700; }
.pill-teal { background: rgba(14,155,138,0.12); color: var(--teal); }
.pill-amber { background: rgba(245,158,11,0.12); color: var(--amber); }
.pill-purple { background: rgba(99,102,241,0.12); color: #6366f1; }
.pill-gray { background: rgba(74,85,104,0.1); color: var(--slate); }
.td-green { color: var(--teal); font-weight: 700; }
.td-bold { font-weight: 700; color: var(--navy); }

/* ===== HOW IT WORKS ===== */
.steps-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; margin-bottom: 28px; }
.step-card { background: white; border: 1px solid var(--border); border-radius: 18px; padding: 22px; display: flex; gap: 16px; transition: box-shadow .2s; }
.step-card:hover { box-shadow: 0 4px 20px rgba(0,0,0,0.07); }
.step-icon-wrap { position: relative; flex-shrink: 0; }
.step-icon { width: 50px; height: 50px; border-radius: 14px; background: rgba(14,155,138,0.08); display: flex; align-items: center; justify-content: center; font-size: 22px; color: var(--teal); }
.step-num { position: absolute; top: -6px; right: -6px; width: 20px; height: 20px; background: var(--navy); border-radius: 50%; font-size: 10px; font-weight: 700; color: white; display: flex; align-items: center; justify-content: center; }
.step-title { font-size: 14px; font-weight: 700; color: var(--navy); margin-bottom: 5px; font-family: 'DM Sans', sans-serif; }
.step-desc { font-size: 13px; color: var(--slate); line-height: 1.6; }
.callout-box { background: var(--navy); border-radius: 20px; padding: 28px 32px; display: flex; gap: 28px; align-items: center; flex-wrap: wrap; }
.callout-left { flex: 1; min-width: 220px; }
.callout-eyebrow { font-size: 10px; font-weight: 700; text-transform: uppercase; letter-spacing: .1em; color: var(--teal); margin-bottom: 8px; }
.callout-title { font-size: 20px; font-weight: 800; color: white; margin-bottom: 8px; font-family: 'DM Sans', sans-serif; }
.callout-desc { font-size: 13px; color: #a0aec0; line-height: 1.6; }
.callout-stats { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.callout-stat { background: rgba(255,255,255,0.07); border-radius: 13px; padding: 12px 18px; text-align: center; }
.callout-stat-val { font-size: 17px; font-weight: 800; color: white; font-family: 'DM Sans', sans-serif; }
.callout-stat-val.accent { color: var(--teal); }
.callout-stat-lbl { font-size: 10px; color: var(--muted); margin-top: 2px; }

/* ===== FAQ ===== */
.faq-list { max-width: 680px; margin: 0 auto; display: flex; flex-direction: column; gap: 10px; }
.faq-item { background: white; border: 1px solid var(--border); border-radius: 15px; overflow: hidden; transition: border-color .2s; }
.faq-item.open { border-color: var(--teal); }
.faq-btn { width: 100%; display: flex; justify-content: space-between; align-items: center; padding: 16px 20px; cursor: pointer; background: none; border: none; text-align: left; gap: 14px; font-family: 'Inter', sans-serif; }
.faq-q { font-size: 14px; font-weight: 600; color: var(--navy); }
.faq-chevron { font-size: 18px; color: var(--teal); transition: transform .25s; flex-shrink: 0; }
.faq-chevron.open { transform: rotate(180deg); }
.faq-answer { display: none; padding: 0 20px 16px; font-size: 13px; color: var(--slate); line-height: 1.7; border-top: 1px solid var(--border); padding-top: 14px; }
.faq-answer.open { display: block; }

/* ===== FOOTER ===== */
footer { background: var(--navy); padding: 56px 24px 0; }
.footer-top { max-width: 1200px; margin: 0 auto; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 36px; margin-bottom: 40px; }
.footer-brand-row { display: flex; align-items: center; gap: 10px; margin-bottom: 14px; }
.footer-logo-icon { background: none; border-radius: 0; width: auto; height: auto; display: flex; align-items: center; justify-content: center; filter: drop-shadow(0 2px 6px rgba(14,196,174,0.3)); }
.footer-brand-name { color: white; font-weight: 700; font-size: 15px; font-family: 'DM Sans', sans-serif; }
.footer-brand-name .teal { color: var(--teal); }
.footer-desc { color: var(--muted); font-size: 13px; line-height: 1.7; max-width: 250px; margin-bottom: 14px; }
.footer-trust { display: inline-block; background: rgba(14,155,138,0.12); color: var(--teal); border-radius: 999px; padding: 5px 14px; font-size: 11px; font-weight: 600; margin-bottom: 18px; }
.footer-social { display: flex; gap: 10px; }
.social-btn {
  width: 36px; height: 36px;
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 16px;
  transition: transform .2s, opacity .2s;
  text-decoration: none;
}
.social-btn:hover { transform: translateY(-2px); opacity: 0.9; }
.social-twitter { background: #1DA1F2; color: white; }
.social-facebook { background: #1877F2; color: white; }
.social-linkedin { background: #0A66C2; color: white; }
.social-pinterest { background: #E60023; color: white; }
.footer-col-title { font-size: 10px; font-weight: 700; text-transform: uppercase; letter-spacing: .1em; color: #a0aec0; margin-bottom: 14px; }
.footer-links { display: flex; flex-direction: column; gap: 8px; }
.footer-links a { color: var(--muted); font-size: 13px; transition: color .2s; }
.footer-links a:hover { color: white; }

/* Footer nav row */
.footer-nav-row {
  max-width: 1200px;
  margin: 0 auto;
  border-top: 1px solid rgba(255,255,255,0.08);
  padding: 24px 0;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px 28px;
}
.footer-nav-row a { color: #9eb3cc; font-size: 13px; font-weight: 500; transition: color .2s; }
.footer-nav-row a:hover { color: white; }

/* Language section */
.footer-lang-section {
  max-width: 1200px;
  margin: 0 auto;
  border-top: 1px solid rgba(255,255,255,0.08);
  padding: 28px 0;
}
.footer-lang-title { font-size: 10px; font-weight: 700; text-transform: uppercase; letter-spacing: .1em; color: #a0aec0; text-align: center; margin-bottom: 16px; }
.lang-grid { display: flex; flex-wrap: wrap; justify-content: center; gap: 8px; }
.lang-btn {
  padding: 7px 16px;
  border-radius: 8px;
  border: 1px solid rgba(255,255,255,0.15);
  background: transparent;
  color: #9eb3cc;
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  transition: all .2s;
  font-family: 'Inter', sans-serif;
  text-decoration: none;
  display: inline-block;
}
.lang-btn:hover { border-color: var(--teal); color: var(--teal); background: rgba(14,155,138,0.08); }
.lang-btn.active { background: rgba(255,255,255,0.12); color: white; border-color: rgba(255,255,255,0.3); font-weight: 600; }

/* Footer bottom */
.footer-bottom {
  max-width: 1200px;
  margin: 0 auto;
  border-top: 1px solid rgba(255,255,255,0.08);
  padding: 18px 0 24px;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 8px;
}
.footer-bottom p { font-size: 12px; color: #4A5568; }

/* ===== RESPONSIVE ===== */
@media (max-width: 900px) {
  .nav-links { display: none; }
  .nav-toggle { display: flex; }
  .calc-grid { grid-template-columns: 1fr; }
  .methods-grid { grid-template-columns: 1fr; }
  .steps-grid { grid-template-columns: 1fr; }
  .formula-boxes { grid-template-columns: 1fr; }
  .formula-plus { font-size: 18px; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .callout-box { flex-direction: column; }
  .footer-bottom { flex-direction: column; text-align: center; }
  .footer-nav-row { gap: 6px 18px; }
}
@media (max-width: 480px) {
  .footer-grid { grid-template-columns: 1fr; }
  .hero-stats { flex-direction: column; align-items: center; }
  .hero-stat { min-width: unset; width: 100%; max-width: 300px; }
}

/* ===== ADVANCED CALCULATOR ===== */
.calc-full { display: grid; grid-template-columns: 1fr 1fr; gap: 28px; }
.calc-section-title {
  font-size: 11px; font-weight: 700; text-transform: uppercase;
  letter-spacing: .09em; color: var(--teal); margin: 22px 0 12px;
  padding-bottom: 6px; border-bottom: 1px solid var(--border);
}
.calc-section-title:first-child { margin-top: 0; }

/* Differentials */
.diff-row {
  background: var(--off-white);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 16px;
  margin-bottom: 12px;
}
.diff-row-header {
  display: flex; justify-content: space-between; align-items: center;
  margin-bottom: 12px;
}
.diff-row-title { font-size: 12px; font-weight: 700; color: var(--navy); }
[data-theme="dark"] .diff-row-title { color: #e2e8f0; }
.diff-remove-btn {
  background: rgba(229,62,62,0.1); border: none; border-radius: 7px;
  color: #e53e3e; width: 28px; height: 28px; display: flex;
  align-items: center; justify-content: center; cursor: pointer;
  font-size: 14px; transition: background .2s;
}
.diff-remove-btn:hover { background: rgba(229,62,62,0.2); }
.diff-fields { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.btn-add-diff {
  width: 100%; padding: 10px; border-radius: 11px;
  border: 1px dashed var(--teal); background: rgba(14,155,138,0.05);
  color: var(--teal); font-size: 13px; font-weight: 600; cursor: pointer;
  display: flex; align-items: center; justify-content: center; gap: 7px;
  font-family: 'Inter', sans-serif; transition: background .2s;
  margin-top: 4px;
}
.btn-add-diff:hover { background: rgba(14,155,138,0.12); }

/* Pay period + currency row */
.two-col { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }

/* Calc error */
.calc-error {
  background: rgba(229,62,62,0.1); border: 1px solid rgba(229,62,62,0.3);
  color: #e53e3e; border-radius: 10px; padding: 10px 14px;
  font-size: 13px; margin-bottom: 14px; display: none;
}

/* Result summary table */
.res-table { width: 100%; border-collapse: collapse; margin-top: 8px; }
.res-table tr { border-top: 1px solid var(--border); }
.res-table tr:first-child { border-top: none; }
.res-table td { padding: 10px 0; font-size: 14px; }
.res-table td:last-child { text-align: right; font-weight: 700; color: var(--navy); }
[data-theme="dark"] .res-table td:last-child { color: #e2e8f0; }
.res-table .res-total-row td { font-size: 16px; font-weight: 800; color: var(--teal); padding-top: 14px; border-top: 2px solid var(--teal); }
.res-explanation {
  background: var(--off-white); border: 1px solid var(--border);
  border-radius: 13px; padding: 16px; margin-top: 16px;
  font-size: 12.5px; color: var(--slate); line-height: 1.85;
}
[data-theme="dark"] .res-explanation { background: #111827; }
.res-explanation strong { color: var(--navy); }
[data-theme="dark"] .res-explanation strong { color: #e2e8f0; }

/* Result header period badge */
.res-period-badge {
  display: inline-block; background: rgba(14,155,138,0.2);
  border-radius: 8px; padding: 3px 10px; font-size: 11px;
  color: var(--teal); font-weight: 700; margin-top: 4px;
}

@media (max-width: 768px) {
  .calc-full { grid-template-columns: 1fr; }
  .diff-fields { grid-template-columns: 1fr; }
  .two-col { grid-template-columns: 1fr; }
}


/* ===== FULL MOBILE RESPONSIVE ===== */
@media (max-width: 900px) {
  .navbar-inner { padding: 0 16px; height: 60px; }
  .nav-logo-name, .nav-logo-dot, .nav-logo-tld { font-size: 15px; }
  .nav-links { display: none; }
  .nav-toggle { display: flex; }
  .hero-inner { padding: 40px 16px 36px; }
  .hero h1 { font-size: clamp(28px, 6vw, 48px); }
  .hero-desc { font-size: 15px; }
  .hero-btns { flex-direction: column; align-items: center; gap: 10px; }
  .hero-btns a { width: 100%; max-width: 320px; justify-content: center; }
  .hero-stats { flex-direction: column; align-items: stretch; gap: 10px; }
  .hero-stat { min-width: unset; width: 100%; }
  .container { padding: 0 16px; }
  .section { padding: 40px 0; }
  .section-title { font-size: clamp(20px, 5vw, 32px); }
  .calc-full { grid-template-columns: 1fr; gap: 20px; }
  .diff-fields { grid-template-columns: 1fr; }
  .two-col { grid-template-columns: 1fr; }
  .methods-grid { grid-template-columns: 1fr; }
  .steps-grid { grid-template-columns: 1fr; }
  .callout-box { flex-direction: column; }
  .callout-stats { grid-template-columns: 1fr 1fr; }
  .formula-dark { padding: 24px 16px; }
  .methods-grid.formula-boxes { grid-template-columns: 1fr; }
  /* Tables: horizontal scroll on mobile */
  .table-wrap { overflow-x: auto; -webkit-overflow-scrolling: touch; }
  .table-wrap table { min-width: 600px; }
  .table-wrap::after {
    content: "← Scroll to see more →";
    display: block;
    text-align: center;
    font-size: 11px;
    color: #9ca3af;
    padding: 6px 0;
  }
  table th, table td { padding: 10px 8px; font-size: 12px; white-space: nowrap; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 24px; }
  .footer-top { padding: 32px 16px 0; }
  .footer-bottom { flex-direction: column; text-align: center; padding: 16px; }
  .footer-nav-row { gap: 6px 14px; flex-wrap: wrap; justify-content: center; padding: 12px 16px; }
  .lang-grid { gap: 6px; padding: 0 16px 16px; }
  .lang-btn { font-size: 11px; padding: 6px 10px; }
  .faq-list { gap: 8px; }
  .faq-btn { padding: 14px 16px; }
}

@media (max-width: 600px) {
  .footer-grid { grid-template-columns: 1fr; }
  .hero-stats { gap: 8px; }
  .callout-stats { grid-template-columns: 1fr 1fr; gap: 12px; }
  .step-card { flex-direction: column; }
  .step-icon-wrap { flex-direction: row; align-items: center; gap: 12px; margin-bottom: 12px; }
  .step-num { position: static; }
  .footer-lang-section { padding: 20px 16px; }
  .footer-brand-row { flex-wrap: wrap; }
  .hero h1 { font-size: 26px; line-height: 1.25; }
  .section-title { font-size: 20px; }
  .card-body { padding: 16px; }
  .res-table td { font-size: 13px; padding: 8px 0; }
  .callout-box { padding: 20px 16px; }
}

@media (max-width: 400px) {
  .navbar-inner { padding: 0 12px; }
  .nav-logo-dot { display: none; }
  .hero-inner { padding: 30px 12px; }
  .hero h1 { font-size: 23px; }
}