/* Coursework Help — Static Site Styles */
:root {
  --c-primary: #1a365d;
  --c-primary-light: #2c5282;
  --c-accent: #dd6b20;
  --c-accent-light: #ed8936;
  --c-bg: #ffffff;
  --c-surface: #f7fafc;
  --c-surface-alt: #edf2f7;
  --c-text: #1a202c;
  --c-text-muted: #718096;
  --c-border: #e2e8f0;
  --c-success: #276749;
  --c-success-bg: #f0fff4;
  --c-warning: #b7791f;
  --c-warning-bg: #fffaf0;
  --c-danger: #c53030;
  --c-danger-bg: #fff5f5;
  --radius: 10px;
  --radius-sm: 6px;
  --max-w: 1100px;
  --max-w-article: 820px;
  --shadow: 0 1px 3px rgba(0,0,0,0.08), 0 1px 2px rgba(0,0,0,0.04);
  --shadow-lg: 0 10px 25px rgba(0,0,0,0.08), 0 4px 10px rgba(0,0,0,0.04);
  --font: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
  --font-heading: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

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

html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }

body {
  font-family: var(--font);
  color: var(--c-text);
  background: var(--c-bg);
  line-height: 1.7;
  font-size: 17px;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4 { font-family: var(--font-heading); line-height: 1.3; font-weight: 700; }
h1 { font-size: clamp(1.75rem, 5vw, 2.5rem); margin-bottom: 1rem; }
h2 { font-size: clamp(1.4rem, 3.5vw, 1.9rem); margin-top: 3rem; margin-bottom: 1rem; }
h3 { font-size: clamp(1.15rem, 2.5vw, 1.4rem); margin-top: 2rem; margin-bottom: 0.75rem; }
h4 { font-size: 1.1rem; margin-top: 1.5rem; margin-bottom: 0.5rem; }
p { margin-bottom: 1.25rem; }
a { color: var(--c-primary); text-decoration: none; }
a:hover { text-decoration: underline; }
ul, ol { margin-bottom: 1.25rem; padding-left: 1.5rem; }
li { margin-bottom: 0.5rem; }
img { max-width: 100%; height: auto; display: block; }
strong { font-weight: 700; }

.container { max-width: var(--max-w); margin: 0 auto; padding: 0 1.5rem; }

/* Header */
.site-header {
  background: var(--c-primary);
  color: #fff;
  padding: 1rem 0;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: var(--shadow);
}
.site-header .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
}
.site-logo { font-size: 1.25rem; font-weight: 700; color: #fff; }
.site-logo:hover { text-decoration: none; opacity: 0.9; }
.site-nav { display: flex; gap: 1.25rem; flex-wrap: wrap; }
.site-nav a { color: rgba(255,255,255,0.85); font-size: 0.9rem; }
.site-nav a:hover { color: #fff; text-decoration: none; }
.site-nav a.active { color: #fff; font-weight: 600; }

/* Article */
main { padding: 2rem 0; }
article { max-width: var(--max-w-article); margin: 0 auto; }

/* Hero image */
.hero-image {
  width: 100%;
  border-radius: var(--radius);
  margin: 1.5rem 0 2rem;
  box-shadow: var(--shadow-lg);
}

/* Quick Answer */
.quick-answer {
  background: var(--c-surface);
  border-left: 4px solid var(--c-accent);
  border-radius: var(--radius);
  padding: 1.5rem 2rem;
  margin: 2rem 0;
}
.quick-answer h2 { margin-top: 0; font-size: 1.3rem; }
.quick-answer ul { margin-bottom: 0; }

/* CTA Block */
.cta-block {
  background: linear-gradient(135deg, var(--c-primary), var(--c-primary-light));
  color: #fff;
  border-radius: var(--radius);
  padding: 2rem;
  margin: 2.5rem 0;
  text-align: center;
}
.cta-block h3 { color: #fff; margin-top: 0; }
.cta-block p { color: rgba(255,255,255,0.9); margin-bottom: 1rem; }
.cta-button {
  display: inline-block;
  background: var(--c-accent);
  color: #fff;
  padding: 0.85rem 2rem;
  border-radius: var(--radius-sm);
  font-weight: 700;
  font-size: 1.05rem;
  margin-top: 0.5rem;
  transition: background 0.2s, transform 0.1s;
}
.cta-button:hover {
  background: var(--c-accent-light);
  text-decoration: none;
  transform: translateY(-1px);
}

/* CTA Block — alt */
.cta-block-alt {
  background: var(--c-surface);
  border: 2px solid var(--c-primary);
  border-radius: var(--radius);
  padding: 2rem;
  margin: 2.5rem 0;
  text-align: center;
}
.cta-block-alt h3 { margin-top: 0; }
.cta-block-alt .cta-button { background: var(--c-primary); }
.cta-block-alt .cta-button:hover { background: var(--c-primary-light); }

/* Service Card */
.service-card {
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  padding: 2rem;
  margin: 2rem 0;
}
.service-card.best {
  border-color: var(--c-accent);
  border-width: 2px;
  background: linear-gradient(180deg, #fffaf0 0%, var(--c-surface) 100%);
}
.service-badge {
  display: inline-block;
  background: var(--c-accent);
  color: #fff;
  padding: 0.25rem 0.75rem;
  border-radius: 20px;
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 0.75rem;
}
.service-card h3 { margin-top: 0; }
.service-card .pros-list { margin-bottom: 1.5rem; }
.service-card .pros-list li { color: var(--c-success); }
.service-card .pros-list li::marker { content: "✓ "; }

/* Comparison Table */
.table-wrap { overflow-x: auto; margin: 2rem 0; }
.comparison-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.95rem;
  min-width: 600px;
}
.comparison-table th {
  background: var(--c-primary);
  color: #fff;
  padding: 1rem;
  text-align: left;
  font-weight: 600;
}
.comparison-table td {
  padding: 1rem;
  border-bottom: 1px solid var(--c-border);
  vertical-align: top;
}
.comparison-table tr:nth-child(even) td { background: var(--c-surface); }
.comparison-table tr:hover td { background: var(--c-surface-alt); }

/* Checklist */
.checklist { list-style: none; padding-left: 0; }
.checklist li {
  padding-left: 2rem;
  position: relative;
  margin-bottom: 0.75rem;
}
.checklist li::before {
  content: "✓";
  position: absolute;
  left: 0;
  color: var(--c-success);
  font-weight: 700;
  font-size: 1.1rem;
}

/* Numbered Tips */
.tips { counter-reset: tip; list-style: none; padding-left: 0; }
.tips li {
  counter-increment: tip;
  padding-left: 3rem;
  position: relative;
  margin-bottom: 1.5rem;
}
.tips li::before {
  content: counter(tip);
  position: absolute;
  left: 0;
  top: 0;
  width: 2rem;
  height: 2rem;
  background: var(--c-primary);
  color: #fff;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.9rem;
}

/* FAQ */
.faq-section { margin: 2.5rem 0; }
details {
  border: 1px solid var(--c-border);
  border-radius: var(--radius-sm);
  padding: 1rem 1.5rem;
  margin-bottom: 0.75rem;
  background: var(--c-bg);
}
summary {
  cursor: pointer;
  font-weight: 600;
  font-size: 1.05rem;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
summary::after { content: "+"; font-size: 1.3rem; color: var(--c-text-muted); }
details[open] summary::after { content: "−"; }
details[open] summary { margin-bottom: 0.75rem; }

/* Stats Block */
.stats-block {
  background: var(--c-surface);
  border-radius: var(--radius);
  padding: 2rem;
  margin: 2rem 0;
}
.stats-block h3 { margin-top: 0; }
.stat-row {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  padding: 1rem 0;
  border-bottom: 1px solid var(--c-border);
}
.stat-row:last-child { border-bottom: none; }
.stat-icon { font-size: 1.5rem; flex-shrink: 0; }

/* Callout */
.callout {
  border-left: 4px solid var(--c-primary);
  background: var(--c-surface);
  padding: 1.5rem;
  margin: 1.5rem 0;
  border-radius: 0 var(--radius) var(--radius) 0;
}
.callout.warning {
  border-color: var(--c-warning);
  background: var(--c-warning-bg);
}

/* Brainstorming */
.brainstorm {
  background: var(--c-surface-alt);
  border-radius: var(--radius);
  padding: 2rem;
  margin: 2rem 0;
}
.brainstorm ul { padding-left: 1.2rem; }
.brainstorm li { margin-bottom: 0.85rem; }

/* Section divider */
hr { border: none; border-top: 1px solid var(--c-border); margin: 3rem 0; }

/* Breadcrumb */
.breadcrumb {
  font-size: 0.85rem;
  color: var(--c-text-muted);
  margin-bottom: 1.5rem;
}
.breadcrumb a { color: var(--c-text-muted); }
.breadcrumb a:hover { color: var(--c-primary); }

/* Affiliate disclosure */
.affiliate-disclosure {
  font-size: 0.85rem;
  color: var(--c-text-muted);
  background: var(--c-surface);
  padding: 1rem 1.5rem;
  border-radius: var(--radius-sm);
  margin: 2rem 0;
  line-height: 1.5;
}

/* Footer */
.site-footer {
  background: var(--c-primary);
  color: rgba(255,255,255,0.8);
  padding: 3rem 0 2rem;
  margin-top: 4rem;
}
.site-footer a { color: rgba(255,255,255,0.8); }
.site-footer a:hover { color: #fff; }
.footer-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 2rem;
  justify-content: space-between;
  margin-bottom: 2rem;
}
.footer-col h4 { color: #fff; margin-bottom: 1rem; font-size: 1rem; }
.footer-col ul { list-style: none; padding: 0; }
.footer-col li { margin-bottom: 0.5rem; }
.footer-col a { font-size: 0.9rem; }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.15);
  padding-top: 1.5rem;
  font-size: 0.85rem;
  text-align: center;
}

/* Lang switcher */
.lang-switcher {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
  margin: 1.5rem 0;
}
.lang-switcher a {
  padding: 0.4rem 0.85rem;
  border: 1px solid var(--c-border);
  border-radius: 20px;
  font-size: 0.85rem;
  color: var(--c-text-muted);
}
.lang-switcher a:hover { border-color: var(--c-primary); color: var(--c-primary); text-decoration: none; }
.lang-switcher a.active { background: var(--c-primary); color: #fff; border-color: var(--c-primary); }

/* Pinterest pin */
.pinterest-pin { margin: 2rem 0; text-align: center; }
.pinterest-pin img { max-width: 400px; margin: 0 auto; border-radius: var(--radius); box-shadow: var(--shadow-lg); }

/* Video */
.video-wrap { margin: 2rem 0; border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow-lg); }
.video-wrap video { width: 100%; display: block; }

/* Responsive */
@media (max-width: 768px) {
  body { font-size: 16px; }
  .site-header .container { flex-direction: column; }
  .site-nav { justify-content: center; }
  .comparison-table { font-size: 0.85rem; }
  .comparison-table th, .comparison-table td { padding: 0.6rem; }
  .cta-block, .cta-block-alt { padding: 1.5rem; }
  .footer-grid { flex-direction: column; }
}

/* RTL */
[dir="rtl"] { text-align: right; }
[dir="rtl"] ul, [dir="rtl"] ol { padding-left: 0; padding-right: 1.5rem; }
[dir="rtl"] .checklist li { padding-left: 0; padding-right: 2rem; }
[dir="rtl"] .checklist li::before { left: auto; right: 0; }
[dir="rtl"] .tips li { padding-left: 0; padding-right: 3rem; }
[dir="rtl"] .tips li::before { left: auto; right: 0; }
[dir="rtl"] .callout { border-left: none; border-right: 4px solid var(--c-primary); border-radius: var(--radius) 0 0 var(--radius); }
[dir="rtl"] .quick-answer { border-left: none; border-right: 4px solid var(--c-accent); }