:root {
  --blue: #0f4c81;
  --blue-dark: #0b3a63;
  --blue-light: #e8f0f8;
  --ink: #1b2733;
  --ink-soft: #4a5a6a;
  --line: #dde5ec;
  --bg: #f6f8fa;
  --card: #ffffff;
  --accent: #0e8a6d;
  --radius: 10px;
  --shadow: 0 1px 3px rgba(16, 42, 67, 0.08), 0 4px 14px rgba(16, 42, 67, 0.06);
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.6;
}
.container { max-width: 1080px; margin: 0 auto; padding: 0 20px; }
.container.narrow { max-width: 760px; padding-top: 40px; padding-bottom: 60px; }
.center { text-align: center; }

/* Header */
.site-header {
  background: var(--blue);
  color: #fff;
  box-shadow: var(--shadow);
}
.header-inner { display: flex; align-items: center; justify-content: space-between; height: 60px; }
.brand {
  color: inherit; text-decoration: none; font-weight: 700; font-size: 1.15rem;
  display: inline-flex; align-items: center; gap: 8px;
}
.brand-mark {
  display: inline-flex; align-items: center; justify-content: center;
  width: 26px; height: 26px; border-radius: 6px;
  background: rgba(255, 255, 255, 0.18); font-weight: 800;
}
.site-nav a {
  color: rgba(255, 255, 255, 0.9); text-decoration: none; margin-left: 22px; font-size: 0.95rem;
}
.site-nav a:hover { color: #fff; text-decoration: underline; }

/* Hero */
.hero { background: linear-gradient(160deg, var(--blue) 0%, var(--blue-dark) 100%); color: #fff; padding: 52px 0; }
.hero h1 { margin: 0 0 10px; font-size: 2.3rem; letter-spacing: -0.5px; }
.hero-sub { margin: 0; max-width: 640px; font-size: 1.1rem; color: rgba(255, 255, 255, 0.88); }

/* Cards */
.category { margin: 38px 0; }
.category h2 { font-size: 1.35rem; border-bottom: 2px solid var(--line); padding-bottom: 8px; }
.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 18px; }
.card {
  display: block; background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 20px; text-decoration: none; color: inherit; box-shadow: var(--shadow);
  transition: transform 0.12s ease, box-shadow 0.12s ease;
}
.card:hover { transform: translateY(-2px); box-shadow: 0 6px 20px rgba(16, 42, 67, 0.12); }
.card h3 { margin: 0 0 6px; font-size: 1.05rem; color: var(--blue); }
.card p { margin: 0 0 12px; font-size: 0.92rem; color: var(--ink-soft); }
.card-cta { font-size: 0.85rem; font-weight: 600; color: var(--accent); }

/* Tool page */
.breadcrumb { margin: 22px 0 6px; font-size: 0.88rem; color: var(--ink-soft); }
.breadcrumb a { color: var(--blue); text-decoration: none; }
.tool-layout { display: grid; grid-template-columns: minmax(0, 1fr) 280px; gap: 28px; padding-bottom: 60px; }
@media (max-width: 860px) { .tool-layout { grid-template-columns: 1fr; } }
.badge {
  display: inline-block; background: var(--blue-light); color: var(--blue);
  font-size: 0.78rem; font-weight: 700; letter-spacing: 0.4px; text-transform: uppercase;
  padding: 3px 10px; border-radius: 20px;
}
h1 { font-size: 1.9rem; margin: 10px 0 6px; letter-spacing: -0.4px; }
.lead { color: var(--ink-soft); font-size: 1.05rem; margin-top: 0; }
.tool-card {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 26px; box-shadow: var(--shadow); margin: 18px 0;
}
form label { display: block; font-weight: 600; font-size: 0.92rem; margin-bottom: 14px; }
form input, form select, form textarea {
  display: block; width: 100%; margin-top: 5px; padding: 10px 12px;
  border: 1px solid var(--line); border-radius: 8px; font-size: 1rem; font-family: inherit;
  background: #fff; color: var(--ink);
}
form input:focus, form select:focus, form textarea:focus {
  outline: 2px solid var(--blue); outline-offset: 1px; border-color: var(--blue);
}
form label.check { display: flex; align-items: center; gap: 8px; font-weight: 500; }
form label.check input { display: inline; width: auto; margin: 0; }
.gpa-row { display: grid; grid-template-columns: 2fr 1fr; gap: 12px; }
.btn {
  display: inline-block; background: var(--blue); color: #fff; border: 0; cursor: pointer;
  font-size: 1rem; font-weight: 600; padding: 11px 26px; border-radius: 8px; text-decoration: none;
}
.btn:hover { background: var(--blue-dark); }
.result {
  margin-top: 20px; padding: 18px 20px; border-radius: 8px;
  background: var(--blue-light); border: 1px solid #c9dcee;
}
.result h2 { margin: 0 0 10px; font-size: 1rem; text-transform: uppercase; letter-spacing: 0.5px; color: var(--blue); }
.result table { width: 100%; border-collapse: collapse; }
.result td { padding: 6px 0; font-size: 0.98rem; }
.result td:last-child { text-align: right; font-weight: 700; font-variant-numeric: tabular-nums; }
.result .big { font-size: 1.6rem; font-weight: 800; color: var(--blue-dark); margin: 4px 0 10px; word-break: break-all; }
.result .error { color: #a4262c; font-weight: 600; margin: 0; }

/* Prose */
.prose h2 { font-size: 1.25rem; margin-top: 30px; }
.prose h3 { font-size: 1.02rem; margin-bottom: 4px; }
.prose p { color: #33414f; }
.prose a { color: var(--blue); }
.home-prose { margin-bottom: 50px; }

/* Sidebar */
.side-card {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 18px 20px; box-shadow: var(--shadow); margin-top: 18px;
}
.side-card h2 { font-size: 1rem; margin: 0 0 10px; }
.side-list { list-style: none; margin: 0; padding: 0; }
.side-list li { padding: 7px 0; border-bottom: 1px solid var(--line); }
.side-list li:last-child { border-bottom: 0; }
.side-list a { color: var(--blue); text-decoration: none; font-size: 0.95rem; }
.side-list a:hover { text-decoration: underline; }

/* Ads: invisible until a publisher ID is configured */
.ad-slot { display: none; margin: 22px 0; min-height: 90px; }
.ad-slot.active { display: block; }

/* Footer */
.site-footer { background: #10222f; color: #b9c6d2; margin-top: 40px; }
.footer-inner { display: flex; justify-content: space-between; gap: 30px; padding: 34px 20px 10px; flex-wrap: wrap; }
.site-footer .brand { color: #fff; }
.footer-note { font-size: 0.88rem; max-width: 420px; }
.footer-links { display: flex; flex-direction: column; gap: 6px; }
.footer-links a { color: #b9c6d2; text-decoration: none; font-size: 0.92rem; }
.footer-links a:hover { color: #fff; }
.copyright { padding: 14px 20px 26px; font-size: 0.8rem; color: #8195a5; }