@import url('https://fonts.googleapis.com/css2?family=DM+Sans:wght@300;400;500;600&family=DM+Mono:wght@400;500&display=swap');

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --orange: #E8521A;
  --orange-light: #FFF0EA;
  --orange-mid: #FDDDD0;
  --dark: #1A1A1A;
  --gray: #6B6B6B;
  --gray-light: #F5F5F3;
  --border: #E8E8E4;
  --white: #FFFFFF;
  --font: 'DM Sans', sans-serif;
  --mono: 'DM Mono', monospace;
}

html { font-size: 16px; scroll-behavior: smooth; }

body {
  font-family: var(--font);
  color: var(--dark);
  background: var(--white);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

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

/* ── NAV ── */
nav {
  border-bottom: 1px solid var(--border);
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 56px;
  position: sticky;
  top: 0;
  background: rgba(255,255,255,0.95);
  backdrop-filter: blur(8px);
  z-index: 100;
}

.nav-logo {
  font-size: 17px;
  font-weight: 600;
  color: var(--dark);
  display: flex;
  align-items: center;
  gap: 6px;
}
.nav-logo span { color: var(--orange); }

.nav-links {
  display: flex;
  gap: 24px;
  list-style: none;
  font-size: 14px;
}
.nav-links a { color: var(--gray); font-weight: 400; }
.nav-links a:hover { color: var(--dark); text-decoration: none; }

/* ── HERO / CONVERTER ── */
.hero {
  background: var(--orange-light);
  border-bottom: 1px solid var(--orange-mid);
  padding: 48px 24px 40px;
  text-align: center;
}

.hero h1 {
  font-size: clamp(26px, 5vw, 40px);
  font-weight: 600;
  letter-spacing: -0.02em;
  line-height: 1.2;
  margin-bottom: 8px;
}

.hero h1 .result-highlight {
  color: var(--orange);
  font-family: var(--mono);
}

.hero .subtitle {
  font-size: 15px;
  color: var(--gray);
  margin-bottom: 32px;
}

/* ── CONVERTER WIDGET ── */
.converter-box {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: 16px;
  max-width: 480px;
  margin: 0 auto;
  padding: 24px;
  box-shadow: 0 2px 24px rgba(0,0,0,0.06);
}

.conv-row {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 12px;
}

.conv-row label {
  font-size: 12px;
  font-weight: 500;
  color: var(--gray);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  min-width: 80px;
  text-align: right;
}

.conv-row input {
  flex: 1;
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 12px 16px;
  font-family: var(--mono);
  font-size: 22px;
  font-weight: 500;
  color: var(--dark);
  background: var(--gray-light);
  transition: border-color 0.15s, background 0.15s;
  outline: none;
  -moz-appearance: textfield;
}
.conv-row input::-webkit-outer-spin-button,
.conv-row input::-webkit-inner-spin-button { -webkit-appearance: none; }
.conv-row input:focus {
  border-color: var(--orange);
  background: var(--white);
}
.conv-row input.result-input {
  background: var(--orange-light);
  border-color: var(--orange-mid);
  color: var(--orange);
}

.conv-unit {
  font-size: 13px;
  color: var(--gray);
  min-width: 30px;
}

.swap-btn {
  display: block;
  margin: 0 auto 12px;
  background: none;
  border: 1px solid var(--border);
  border-radius: 50%;
  width: 34px;
  height: 34px;
  cursor: pointer;
  font-size: 16px;
  color: var(--gray);
  transition: all 0.15s;
  display: flex;
  align-items: center;
  justify-content: center;
}
.swap-btn:hover { border-color: var(--orange); color: var(--orange); transform: rotate(180deg); }

.formula-note {
  text-align: center;
  font-family: var(--mono);
  font-size: 12px;
  color: var(--gray);
  margin-top: 16px;
  padding-top: 16px;
  border-top: 1px solid var(--border);
}

/* ── MAIN CONTENT ── */
.container {
  max-width: 720px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ── ANSWER BOX ── */
.answer-box {
  background: var(--orange-light);
  border: 1px solid var(--orange-mid);
  border-radius: 12px;
  padding: 20px 24px;
  margin: 32px 0 24px;
}
.answer-box .answer-title {
  font-size: 13px;
  font-weight: 500;
  color: var(--orange);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 8px;
}
.answer-box .answer-text {
  font-size: 18px;
  font-weight: 500;
  color: var(--dark);
  line-height: 1.5;
}
.answer-box .answer-text strong {
  font-family: var(--mono);
  color: var(--orange);
}

/* ── REFERENCE PILLS ── */
.section-title {
  font-size: 13px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  color: var(--gray);
  margin: 32px 0 14px;
}

.context-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(190px, 1fr));
  gap: 8px;
  margin-bottom: 32px;
}

.context-card {
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 12px 14px;
  background: var(--white);
  transition: border-color 0.15s, background 0.15s;
  cursor: default;
}
.context-card:hover {
  border-color: var(--orange-mid);
  background: var(--orange-light);
}
.context-card .cc-val {
  font-family: var(--mono);
  font-size: 15px;
  font-weight: 500;
  color: var(--dark);
}
.context-card .cc-lbl {
  font-size: 12px;
  color: var(--gray);
  margin-top: 2px;
}

/* ── NEARBY LINKS ── */
.nearby-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
  gap: 6px;
  margin-bottom: 32px;
}

.nearby-link {
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 8px 12px;
  font-size: 13px;
  color: var(--orange);
  text-align: center;
  transition: all 0.15s;
  display: block;
}
.nearby-link:hover {
  background: var(--orange-light);
  border-color: var(--orange);
  text-decoration: none;
}

/* ── FAQ ── */
.faq-list { margin-bottom: 32px; }

.faq-item {
  border-top: 1px solid var(--border);
  padding: 18px 0;
}
.faq-item:last-child { border-bottom: 1px solid var(--border); }

.faq-q {
  font-size: 15px;
  font-weight: 500;
  color: var(--dark);
  margin-bottom: 6px;
}
.faq-a {
  font-size: 14px;
  color: var(--gray);
  line-height: 1.7;
}

/* ── AD SLOTS ── */
.ad-slot {
  background: var(--gray-light);
  border: 1px dashed var(--border);
  border-radius: 8px;
  padding: 16px;
  text-align: center;
  font-size: 12px;
  color: #BBBBB5;
  margin: 24px 0;
  min-height: 100px;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* ── FOOTER ── */
footer {
  border-top: 1px solid var(--border);
  padding: 32px 24px;
  margin-top: 48px;
  text-align: center;
  font-size: 13px;
  color: var(--gray);
}
footer a { color: var(--gray); }
footer a:hover { color: var(--orange); text-decoration: none; }
.footer-links { display: flex; justify-content: center; gap: 20px; margin-bottom: 12px; flex-wrap: wrap; }

/* ── BREADCRUMB ── */
.breadcrumb {
  font-size: 13px;
  color: var(--gray);
  padding: 16px 0 0;
}
.breadcrumb a { color: var(--gray); }
.breadcrumb a:hover { color: var(--orange); text-decoration: none; }
.breadcrumb span { margin: 0 6px; }

/* ── CATEGORY PAGE ── */
.value-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
  margin-bottom: 32px;
}
.value-table th {
  text-align: left;
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--gray);
  padding: 10px 14px;
  border-bottom: 2px solid var(--border);
}
.value-table td {
  padding: 10px 14px;
  border-bottom: 1px solid var(--border);
}
.value-table tr:hover td { background: var(--gray-light); }
.value-table td a { color: var(--orange); font-weight: 500; }
.value-table td .mono { font-family: var(--mono); }

/* ── HOMEPAGE HERO ── */
.home-hero {
  padding: 64px 24px 48px;
  text-align: center;
  background: var(--orange-light);
  border-bottom: 1px solid var(--orange-mid);
}
.home-hero h1 {
  font-size: clamp(32px, 6vw, 52px);
  font-weight: 600;
  letter-spacing: -0.03em;
  line-height: 1.15;
  margin-bottom: 16px;
}
.home-hero h1 em {
  font-style: normal;
  color: var(--orange);
}
.home-hero .tagline {
  font-size: 17px;
  color: var(--gray);
  max-width: 440px;
  margin: 0 auto 36px;
}

/* ── RESPONSIVE ── */
@media (max-width: 600px) {
  .nav-links { display: none; }
  .conv-row label { min-width: 60px; font-size: 11px; }
  .conv-row input { font-size: 18px; }
  .context-grid { grid-template-columns: repeat(2, 1fr); }
  .nearby-grid { grid-template-columns: repeat(2, 1fr); }
}