:root {
  --bg: #FAFAF8;
  --surface: #FFFFFF;
  --ink: #1A1D23;
  --ink-soft: #5B6270;
  --border: #E8E7E3;
  --accent: #FF5A36;
  --accent-ink: #FFFFFF;
  --accent-soft: #FFF1EC;
  --radius: 12px;
  --max: 880px;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, "Inter", "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--ink);
  line-height: 1.6;
}

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

.wrap { max-width: var(--max); margin: 0 auto; padding: 0 20px; }

/* Header */
header.site {
  border-bottom: 1px solid var(--border);
  background: var(--surface);
  position: sticky;
  top: 0;
  z-index: 10;
}
header.site .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}
.logo {
  font-weight: 800;
  font-size: 20px;
  color: var(--ink);
  letter-spacing: -0.02em;
}
.logo span { color: var(--accent); }
nav.site-nav a {
  color: var(--ink-soft);
  font-weight: 600;
  font-size: 14px;
  margin-left: 24px;
}
nav.site-nav a:hover { color: var(--ink); text-decoration: none; }

/* Hero */
.hero {
  padding: 56px 0 40px;
  text-align: center;
}
.hero h1 {
  font-size: 40px;
  letter-spacing: -0.03em;
  margin: 0 0 12px;
}
.hero p {
  color: var(--ink-soft);
  font-size: 17px;
  max-width: 560px;
  margin: 0 auto;
}

/* Tool grid on homepage */
.tool-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
  padding: 24px 0 64px;
}
.tool-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  transition: transform 0.15s ease, border-color 0.15s ease;
}
.tool-card:hover {
  transform: translateY(-2px);
  border-color: var(--accent);
  text-decoration: none;
}
.tool-card .icon { font-size: 28px; margin-bottom: 12px; display: block; }
.tool-card h3 { margin: 0 0 6px; font-size: 17px; color: var(--ink); }
.tool-card p { margin: 0; font-size: 14px; color: var(--ink-soft); }

/* Tool page layout */
main.tool-page { padding: 40px 0 80px; }
.tool-page h1 { font-size: 30px; letter-spacing: -0.02em; margin-bottom: 8px; }
.intro-answer {
  font-size: 17px;
  color: var(--ink-soft);
  max-width: 640px;
  margin-bottom: 32px;
}

.tool-box {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  margin-bottom: 48px;
}

.field { margin-bottom: 16px; }
.field label {
  display: block;
  font-size: 13px;
  font-weight: 700;
  color: var(--ink-soft);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-bottom: 6px;
}
input[type="text"], input[type="number"], textarea, select {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 16px;
  font-family: inherit;
  background: var(--bg);
  color: var(--ink);
}
textarea { min-height: 160px; resize: vertical; }
input:focus, textarea:focus, select:focus {
  outline: none;
  border-color: var(--accent);
}

button.primary {
  background: var(--accent);
  color: var(--accent-ink);
  border: none;
  padding: 12px 22px;
  border-radius: 8px;
  font-weight: 700;
  font-size: 15px;
  cursor: pointer;
}
button.primary:hover { opacity: 0.9; }
button.secondary {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--ink);
  padding: 12px 20px;
  border-radius: 8px;
  font-weight: 600;
  cursor: pointer;
  margin-left: 8px;
}

.result-box {
  background: var(--accent-soft);
  border: 1px solid #FFD9CB;
  border-radius: 8px;
  padding: 16px;
  margin-top: 16px;
  font-weight: 700;
  font-size: 18px;
}

.stat-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(110px, 1fr));
  gap: 12px;
  margin-top: 12px;
}
.stat {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 12px;
  text-align: center;
}
.stat .num { font-size: 22px; font-weight: 800; color: var(--accent); }
.stat .label { font-size: 12px; color: var(--ink-soft); text-transform: uppercase; }

/* Content sections */
.content-block { max-width: 680px; margin-bottom: 40px; }
.content-block h2 { font-size: 22px; margin-bottom: 12px; }
.content-block ul { padding-left: 20px; }

.faq-item { margin-bottom: 20px; }
.faq-item h3 { font-size: 16px; margin-bottom: 6px; }
.faq-item p { color: var(--ink-soft); margin: 0; }

.related { margin-top: 40px; }
.related h2 { font-size: 18px; margin-bottom: 12px; }
.related-links { display: flex; flex-wrap: wrap; gap: 10px; }
.related-links a {
  background: var(--surface);
  border: 1px solid var(--border);
  padding: 8px 14px;
  border-radius: 20px;
  font-size: 14px;
  font-weight: 600;
  color: var(--ink);
}
.related-links a:hover { border-color: var(--accent); text-decoration: none; }

footer.site {
  border-top: 1px solid var(--border);
  padding: 32px 0;
  text-align: center;
  color: var(--ink-soft);
  font-size: 13px;
}
footer.site a { color: var(--ink-soft); margin: 0 8px; }

.ad-slot {
  background: var(--surface);
  border: 1px dashed var(--border);
  border-radius: 8px;
  padding: 20px;
  text-align: center;
  color: var(--ink-soft);
  font-size: 12px;
  margin: 32px 0;
}

@media (max-width: 600px) {
  .hero h1 { font-size: 28px; }
  nav.site-nav a { margin-left: 14px; font-size: 13px; }
}