/* APA Citations — apacitations.com */
:root {
  --primary: #1a56db;
  --primary-dark: #1240a8;
  --primary-light: #e8effc;
  --ink: #1f2937;
  --ink-soft: #4b5563;
  --ink-faint: #6b7280;
  --bg: #ffffff;
  --bg-soft: #f6f8fb;
  --border: #e5e7eb;
  --success: #047857;
  --radius: 10px;
  --shadow: 0 1px 3px rgba(16, 24, 40, .08), 0 1px 2px rgba(16, 24, 40, .06);
  --shadow-lg: 0 10px 30px rgba(16, 24, 40, .10);
  --max: 1080px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: "Segoe UI", -apple-system, BlinkMacSystemFont, Roboto, "Helvetica Neue", Arial, sans-serif;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.65;
  font-size: 16.5px;
}
a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }
img, svg { max-width: 100%; }
.container { max-width: var(--max); margin: 0 auto; padding: 0 20px; }

/* Header */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255,255,255,.96);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
}
.nav-wrap { display: flex; align-items: center; justify-content: space-between; height: 62px; }
.brand { display: flex; align-items: center; gap: 9px; font-weight: 700; font-size: 1.18rem; color: var(--ink); }
.brand:hover { text-decoration: none; }
.brand .logo-badge {
  width: 34px; height: 34px; border-radius: 8px;
  background: linear-gradient(135deg, var(--primary), #3b82f6);
  color: #fff; display: inline-flex; align-items: center; justify-content: center;
  font-weight: 800; font-size: .95rem; letter-spacing: -.5px;
}
.brand em { font-style: normal; color: var(--primary); }
.main-nav { display: flex; gap: 4px; align-items: center; flex-wrap: wrap; }
.main-nav a {
  color: var(--ink-soft); font-weight: 500; font-size: .93rem;
  padding: 7px 11px; border-radius: 7px;
}
.main-nav a:hover, .main-nav a.active { background: var(--primary-light); color: var(--primary-dark); text-decoration: none; }
.nav-toggle { display: none; background: none; border: 1px solid var(--border); border-radius: 8px; padding: 6px 10px; font-size: 1.15rem; cursor: pointer; color: var(--ink); }

/* Hero */
.hero { background: linear-gradient(180deg, #f0f5ff 0%, #ffffff 100%); padding: 44px 0 10px; text-align: center; }
.hero h1 { font-size: clamp(1.7rem, 4vw, 2.5rem); margin: 0 0 10px; letter-spacing: -.5px; line-height: 1.2; }
.hero .subtitle { color: var(--ink-soft); max-width: 720px; margin: 0 auto 8px; font-size: 1.06rem; }
.trust-row { display: flex; gap: 18px; justify-content: center; flex-wrap: wrap; margin: 14px 0 4px; color: var(--ink-faint); font-size: .87rem; }
.trust-row span::before { content: "✓ "; color: var(--success); font-weight: 700; }

/* Tool card */
.tool-section { padding: 18px 0 34px; }
.tool-card {
  background: #fff; border: 1px solid var(--border); border-radius: 14px;
  box-shadow: var(--shadow-lg); max-width: 860px; margin: 0 auto; overflow: hidden;
}
.tabs { display: flex; border-bottom: 1px solid var(--border); background: var(--bg-soft); overflow-x: auto; }
.tab {
  flex: 1; min-width: 110px; padding: 13px 10px; text-align: center; cursor: pointer;
  border: none; background: none; font-size: .95rem; font-weight: 600; color: var(--ink-faint);
  border-bottom: 3px solid transparent; font-family: inherit; white-space: nowrap;
}
.tab:hover { color: var(--primary); }
.tab.active { color: var(--primary); border-bottom-color: var(--primary); background: #fff; }
.tool-body { padding: 22px; }
.style-row { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; margin-bottom: 16px; }
.style-row label { font-weight: 600; font-size: .92rem; }
.style-row select, .form-grid input, .form-grid select {
  padding: 10px 12px; border: 1px solid #cbd5e1; border-radius: 8px;
  font-size: .95rem; font-family: inherit; color: var(--ink); background: #fff;
}
.style-row select:focus, .form-grid input:focus { outline: 2px solid var(--primary-light); border-color: var(--primary); }

.autocite { display: flex; gap: 8px; margin-bottom: 6px; }
.autocite input { flex: 1; padding: 12px 14px; border: 1px solid #cbd5e1; border-radius: 8px; font-size: .97rem; font-family: inherit; }
.autocite input:focus { outline: 2px solid var(--primary-light); border-color: var(--primary); }
.hint { color: var(--ink-faint); font-size: .84rem; margin: 4px 2px 14px; }
.divider { display: flex; align-items: center; gap: 12px; color: var(--ink-faint); font-size: .82rem; margin: 14px 0; text-transform: uppercase; letter-spacing: .5px; }
.divider::before, .divider::after { content: ""; flex: 1; height: 1px; background: var(--border); }

.form-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 12px 14px; }
.form-grid .full { grid-column: 1 / -1; }
.form-grid label { display: block; font-size: .84rem; font-weight: 600; color: var(--ink-soft); margin-bottom: 4px; }
.form-grid input, .form-grid select { width: 100%; }
.authors-list .author-row { display: grid; grid-template-columns: 1fr 1fr 1fr auto; gap: 8px; margin-bottom: 8px; }
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 7px;
  background: var(--primary); color: #fff; border: none; border-radius: 8px;
  padding: 12px 22px; font-size: 1rem; font-weight: 600; cursor: pointer; font-family: inherit;
  transition: background .15s;
}
.btn:hover { background: var(--primary-dark); }
.btn.secondary { background: #fff; color: var(--primary); border: 1px solid var(--primary); }
.btn.secondary:hover { background: var(--primary-light); }
.btn.small { padding: 7px 13px; font-size: .86rem; }
.btn.ghost { background: none; border: 1px dashed #cbd5e1; color: var(--ink-soft); }
.btn.ghost:hover { border-color: var(--primary); color: var(--primary); }
.remove-author { background: none; border: none; color: #b91c1c; font-size: 1.2rem; cursor: pointer; padding: 0 8px; }
.actions { margin-top: 18px; display: flex; gap: 10px; flex-wrap: wrap; }

/* Result */
.result-box { margin-top: 20px; display: none; }
.result-box.show { display: block; }
.result-label { font-size: .82rem; font-weight: 700; text-transform: uppercase; letter-spacing: .6px; color: var(--ink-faint); margin-bottom: 6px; }
.citation-output {
  background: var(--bg-soft); border: 1px solid var(--border); border-left: 4px solid var(--primary);
  border-radius: 8px; padding: 16px 18px; font-size: 1rem;
  padding-left: 2.7em; text-indent: -1.2em; line-height: 1.9;
}
.intext-output {
  background: var(--bg-soft); border: 1px solid var(--border); border-left: 4px solid #7c3aed;
  border-radius: 8px; padding: 12px 18px; font-size: .97rem; margin-top: 10px;
}
.copy-row { display: flex; gap: 8px; margin-top: 10px; }
.copied-msg { color: var(--success); font-weight: 600; font-size: .88rem; align-self: center; display: none; }

/* Sections */
section.content-band { padding: 40px 0; }
section.content-band.alt { background: var(--bg-soft); }
.content-band h2 { font-size: 1.65rem; margin: 0 0 14px; letter-spacing: -.3px; }
.content-band h3 { font-size: 1.2rem; margin: 24px 0 8px; }
.feature-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; margin-top: 22px; }
.feature {
  background: #fff; border: 1px solid var(--border); border-radius: var(--radius);
  padding: 20px; box-shadow: var(--shadow);
}
.feature .icon { font-size: 1.6rem; margin-bottom: 8px; }
.feature h3 { margin: 0 0 6px; font-size: 1.05rem; }
.feature p { margin: 0; color: var(--ink-soft); font-size: .93rem; }

.steps { counter-reset: step; display: grid; gap: 14px; margin-top: 18px; }
.step { display: flex; gap: 14px; align-items: flex-start; }
.step::before {
  counter-increment: step; content: counter(step);
  width: 32px; height: 32px; flex: 0 0 32px; border-radius: 50%;
  background: var(--primary); color: #fff; font-weight: 700;
  display: inline-flex; align-items: center; justify-content: center; font-size: .95rem;
}
.step h3 { margin: 2px 0 4px; font-size: 1.05rem; }
.step p { margin: 0; color: var(--ink-soft); font-size: .95rem; }

.example-block {
  background: var(--bg-soft); border: 1px solid var(--border); border-radius: 8px;
  padding: 14px 18px 14px 2.9em; text-indent: -1.2em; margin: 10px 0; font-size: .97rem; line-height: 1.85;
}
.label-chip {
  display: inline-block; background: var(--primary-light); color: var(--primary-dark);
  font-size: .78rem; font-weight: 700; padding: 2px 10px; border-radius: 20px; margin-bottom: 6px;
  text-indent: 0;
}

/* FAQ */
.faq-item { border-bottom: 1px solid var(--border); }
.faq-item summary {
  cursor: pointer; padding: 15px 4px; font-weight: 600; font-size: 1.02rem; list-style: none;
  display: flex; justify-content: space-between; align-items: center;
}
.faq-item summary::after { content: "+"; font-size: 1.4rem; color: var(--primary); font-weight: 400; }
.faq-item[open] summary::after { content: "−"; }
.faq-item .faq-body { padding: 0 4px 16px; color: var(--ink-soft); }

/* Article pages */
.article-layout { display: grid; grid-template-columns: minmax(0, 1fr) 280px; gap: 40px; padding: 36px 0 50px; }
.article-main h1 { font-size: clamp(1.6rem, 3.5vw, 2.15rem); line-height: 1.25; margin: 0 0 6px; letter-spacing: -.4px; }
.article-meta { color: var(--ink-faint); font-size: .88rem; margin-bottom: 22px; }
.article-main h2 { font-size: 1.45rem; margin: 34px 0 10px; letter-spacing: -.2px; }
.article-main h3 { font-size: 1.15rem; margin: 24px 0 8px; }
.article-main p, .article-main li { color: #374151; }
.article-main table { border-collapse: collapse; width: 100%; margin: 14px 0; font-size: .94rem; }
.article-main th, .article-main td { border: 1px solid var(--border); padding: 9px 12px; text-align: left; vertical-align: top; }
.article-main th { background: var(--bg-soft); }
.toc {
  background: var(--bg-soft); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 16px 18px; position: sticky; top: 80px;
}
.toc h2 { font-size: .95rem; margin: 0 0 8px; text-transform: uppercase; letter-spacing: .5px; color: var(--ink-faint); }
.toc ul { margin: 0; padding-left: 18px; font-size: .92rem; }
.toc li { margin-bottom: 6px; }
.cta-box {
  background: linear-gradient(135deg, var(--primary), #3b82f6); color: #fff;
  border-radius: var(--radius); padding: 22px; margin: 28px 0; text-align: center;
}
.cta-box h3 { margin: 0 0 6px; color: #fff; }
.cta-box p { color: #dbeafe; margin: 0 0 14px; }
.cta-box .btn { background: #fff; color: var(--primary); }
.cta-box .btn:hover { background: var(--primary-light); }

/* Style cards on home */
.style-cards { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; margin-top: 20px; }
.style-card {
  background: #fff; border: 1px solid var(--border); border-radius: var(--radius);
  padding: 18px; box-shadow: var(--shadow); text-align: center;
}
.style-card h3 { margin: 0 0 6px; }
.style-card p { color: var(--ink-soft); font-size: .88rem; margin: 0 0 12px; }

/* Guides grid */
.guides-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; margin-top: 20px; }
.guide-card {
  background: #fff; border: 1px solid var(--border); border-radius: var(--radius);
  padding: 18px 20px; box-shadow: var(--shadow); display: block; color: var(--ink);
}
.guide-card:hover { border-color: var(--primary); text-decoration: none; box-shadow: var(--shadow-lg); }
.guide-card h3 { margin: 0 0 6px; font-size: 1.04rem; color: var(--primary); }
.guide-card p { margin: 0; color: var(--ink-soft); font-size: .9rem; }

/* Footer */
.site-footer { background: #0f1b33; color: #cbd5e1; margin-top: 30px; padding: 40px 0 24px; font-size: .92rem; }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1fr; gap: 28px; }
.site-footer h4 { color: #fff; margin: 0 0 10px; font-size: .95rem; text-transform: uppercase; letter-spacing: .6px; }
.site-footer a { color: #cbd5e1; display: block; margin-bottom: 7px; }
.site-footer a:hover { color: #fff; }
.footer-bottom { border-top: 1px solid #26324d; margin-top: 28px; padding-top: 16px; color: #94a3b8; font-size: .85rem; display: flex; justify-content: space-between; flex-wrap: wrap; gap: 8px; }
.footer-about p { margin: 0; color: #94a3b8; line-height: 1.6; }

/* Breadcrumb */
.breadcrumb { font-size: .86rem; color: var(--ink-faint); padding: 14px 0 0; }
.breadcrumb a { color: var(--ink-faint); }
.breadcrumb a:hover { color: var(--primary); }

.notice {
  background: #fffbeb; border: 1px solid #fcd34d; color: #92400e;
  border-radius: 8px; padding: 10px 14px; font-size: .9rem; margin: 10px 0; display: none;
}
.notice.show { display: block; }

/* Responsive */
@media (max-width: 900px) {
  .feature-grid { grid-template-columns: repeat(2, 1fr); }
  .style-cards { grid-template-columns: repeat(2, 1fr); }
  .article-layout { grid-template-columns: 1fr; }
  .toc { position: static; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 640px) {
  .form-grid { grid-template-columns: 1fr; }
  .authors-list .author-row { grid-template-columns: 1fr 1fr; }
  .authors-list .author-row input:nth-child(3) { grid-column: 1; }
  .feature-grid, .guides-grid { grid-template-columns: 1fr; }
  .main-nav {
    display: none; position: absolute; top: 62px; left: 0; right: 0;
    background: #fff; border-bottom: 1px solid var(--border); flex-direction: column;
    align-items: stretch; padding: 10px 16px; box-shadow: var(--shadow-lg);
  }
  .main-nav.open { display: flex; }
  .nav-toggle { display: block; }
  .autocite { flex-direction: column; }
}