/* ---- base ---- */
:root {
  --bg: #f6f7fb;
  --card: #ffffff;
  --ink: #1c2230;
  --muted: #5b6472;
  --line: #e4e7ee;
  --accent: #4f46e5;
  --accent-dark: #4338ca;
  --good: #16a34a;
  --bad: #dc2626;
  --radius: 14px;
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
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 { width: 100%; max-width: 820px; margin: 0 auto; padding: 0 18px; }
.container.narrow { max-width: 680px; }
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
h1 { font-size: 1.9rem; line-height: 1.25; margin: 0 0 .6em; }
h2 { font-size: 1.3rem; margin: 1.4em 0 .5em; }
img { max-width: 100%; }

/* ---- header / footer ---- */
.site-header {
  background: var(--card);
  border-bottom: 1px solid var(--line);
}
.site-header .container { display: flex; align-items: center; justify-content: space-between; height: 60px; }
.brand { font-weight: 800; font-size: 1.15rem; color: var(--ink); letter-spacing: -.02em; }
.brand:hover { text-decoration: none; }
.nav a { color: var(--muted); margin-left: 18px; font-size: .95rem; }

/* ---- search ---- */
.search-section.home-search { max-width: 480px; margin: 6px auto 0; }
.search-section.quiz-search { margin-top: 40px; }
.search-section.quiz-search h2 { margin-bottom: .6em; }
.search-section.quiz-search .search-wrap { max-width: 480px; }
.search-wrap { position: relative; }
.theme-search-input {
  width: 100%;
  font: inherit;
  padding: 8px 14px;
  border: 1.5px solid var(--line);
  border-radius: 999px;
  background: var(--bg);
  color: var(--ink);
}
.theme-search-input:focus { outline: none; border-color: var(--accent); background: #fff; }
.search-results {
  display: none;
  position: absolute;
  top: calc(100% + 6px);
  left: 0; right: 0;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 12px;
  box-shadow: 0 12px 30px rgba(20, 30, 60, .12);
  max-height: 320px;
  overflow-y: auto;
  z-index: 100;
  padding: 6px;
}
.search-item {
  display: block;
  padding: 9px 12px;
  border-radius: 8px;
  color: var(--ink);
  font-size: .95rem;
}
.search-item:hover { background: var(--bg); text-decoration: none; }
.search-empty, .search-empty:hover { color: var(--muted); cursor: default; background: transparent; }
.site-footer {
  margin-top: 56px;
  background: var(--card);
  border-top: 1px solid var(--line);
  padding: 26px 0;
}
.footer-links { display: flex; flex-wrap: wrap; gap: 18px; }
.footer-links a { color: var(--muted); font-size: .9rem; }
.copyright { color: var(--muted); font-size: .8rem; margin: 14px 0 0; }

/* ---- home ---- */
.hero { text-align: center; padding: 40px 0 8px; }
.hero h1 { font-size: 2.3rem; }
.hero p { color: var(--muted); max-width: 560px; margin: 0 auto; }
.grid {
  margin-top: 28px;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(230px, 1fr));
  gap: 16px;
}
.card {
  display: block;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 18px;
  color: var(--ink);
  transition: transform .12s ease, box-shadow .12s ease, border-color .12s ease;
}
.card:hover { text-decoration: none; transform: translateY(-2px); box-shadow: 0 8px 24px rgba(20,30,60,.08); border-color: #cdd2df; }
.card h2 { margin: 0 0 .4em; font-size: 1.15rem; }
.card p { color: var(--muted); font-size: .9rem; margin: 0 0 .8em; }
.card-cta { color: var(--accent); font-weight: 600; font-size: .9rem; }

/* ---- article / quiz ---- */
main { padding-top: 22px; }
.crumb { color: var(--muted); font-size: .85rem; margin: 0 0 .4em; }
.intro p { color: #39414f; }
.panel h1 { margin-top: .2em; }

.quiz {
  margin: 26px 0;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 22px;
}
.quiz-bar {
  display: flex; justify-content: space-between; align-items: center;
  font-size: .9rem; color: var(--muted); margin-bottom: 14px;
  font-weight: 600;
}
.q { margin: 0 0 26px; }
.q.is-hidden { display: none; }
.q-text { font-size: 1.12rem; font-weight: 600; margin: 0 0 14px; }
.q-num { color: var(--accent); margin-right: 4px; }
.opts { display: grid; gap: 10px; }
.opt {
  text-align: left;
  font: inherit;
  background: #fbfbfd;
  border: 1.5px solid var(--line);
  border-radius: 10px;
  padding: 12px 14px;
  cursor: pointer;
  color: var(--ink);
  transition: border-color .1s ease, background .1s ease;
}
.opt:hover:not(:disabled) { border-color: var(--accent); }
.opt:disabled { cursor: default; }
.opt.correct { border-color: var(--good); background: #ecfdf3; color: #0f7a36; font-weight: 600; }
.opt.wrong { border-color: var(--bad); background: #fef2f2; color: #b42121; }

.btn {
  display: inline-block;
  font: inherit; font-weight: 600;
  background: var(--accent); color: #fff;
  border: none; border-radius: 10px;
  padding: 11px 20px; cursor: pointer;
  transition: background .1s ease;
}
.btn:hover { background: var(--accent-dark); text-decoration: none; color: #fff; }
.btn.ghost { background: transparent; color: var(--accent); border: 1.5px solid var(--line); margin-left: 8px; }
.btn.ghost:hover { color: var(--accent); border-color: var(--accent); }
.quiz-next { margin-top: 4px; }

.quiz-results { text-align: center; padding: 10px 0; }
.score-line { font-size: 2.2rem; font-weight: 800; margin: .2em 0; }
.score-num { color: var(--accent); }
.score-msg { color: var(--muted); margin-bottom: 18px; }

.about-quiz { color: #39414f; }
.about-quiz p { margin: 0 0 1em; }

.faq { color: #39414f; margin-top: 8px; }
.faq-item { padding: 14px 0; border-top: 1px solid var(--line); }
.faq-item h3 { font-size: 1.05rem; margin: 0 0 .3em; color: var(--ink); }
.faq-item p { margin: 0; }

.blog-post { color: #2c333f; }
.blog-post h1 { margin-bottom: .5em; }
.blog-post h2 { font-size: 1.25rem; margin: 1.5em 0 .4em; }
.blog-post p { margin: 0 0 1.1em; }

.related { margin-top: 36px; }
.related h2 { margin-bottom: .6em; }
.related-grid { grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); }
.related-grid .card h3 { margin: 0 0 .6em; font-size: 1.05rem; }

/* ---- forms ---- */
.panel { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 26px; }
.contact-form { display: grid; gap: 6px; margin-top: 10px; }
.form-label { font-weight: 600; font-size: .9rem; margin-top: 10px; }
.form-input { font: inherit; padding: 10px 12px; border: 1.5px solid var(--line); border-radius: 8px; background: #fff; }
.form-textarea { min-height: 130px; resize: vertical; }
.contact-form .btn { margin-top: 14px; justify-self: start; }

@media (max-width: 560px) {
  .hero h1 { font-size: 1.9rem; }
  h1 { font-size: 1.6rem; }
}