/* Python Mastery - Course Styles */
:root {
  --bg: #0f1419;
  --surface: #1a2332;
  --text: #e6edf3;
  --muted: #8b949e;
  --accent: #58a6ff;
  --accent2: #3fb950;
  --border: #30363d;
}

* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: 'Segoe UI', system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
}

.top-nav {
  background: var(--surface);
  padding: 1rem 2rem;
  border-bottom: 1px solid var(--border);
  display: flex;
  gap: 1.5rem;
  flex-wrap: wrap;
}
.top-nav a {
  color: var(--accent);
  text-decoration: none;
}
.top-nav a:hover { text-decoration: underline; }

.container {
  max-width: 800px;
  margin: 0 auto;
  padding: 2rem;
}

.hero {
  margin-bottom: 3rem;
}
.hero h1 { font-size: 2.5rem; margin-bottom: 0.5rem; }
.subtitle { font-size: 1.25rem; color: var(--muted); }
.description { margin: 1rem 0; }
.meta {
  display: flex;
  gap: 1.5rem;
  flex-wrap: wrap;
  margin-top: 1rem;
  color: var(--muted);
  font-size: 0.9rem;
}

section { margin: 2rem 0; }
section h2 {
  color: var(--accent);
  font-size: 1.25rem;
  margin-bottom: 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--border);
}

.phases, .week-grid {
  display: grid;
  gap: 1rem;
  margin-top: 1rem;
}
.phase-card, .week-card {
  background: var(--surface);
  padding: 1.25rem;
  border-radius: 8px;
  border: 1px solid var(--border);
}
.week-card {
  text-decoration: none;
  color: inherit;
  display: block;
  transition: border-color 0.2s;
}
.week-card:hover { border-color: var(--accent); }
.week-card h3 { margin: 0.5rem 0; }
.week-card p { color: var(--muted); font-size: 0.9rem; margin: 0; }
.week-num { color: var(--accent); font-size: 0.85rem; }

.block-header { margin-bottom: 2rem; }
.badge {
  display: inline-block;
  background: var(--surface);
  padding: 0.25rem 0.5rem;
  border-radius: 4px;
  font-size: 0.8rem;
  color: var(--muted);
  margin-bottom: 0.5rem;
}
.block-header h1 { font-size: 1.75rem; margin: 0.5rem 0; }
.objective { color: var(--muted); font-size: 1rem; }

.block-list {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 1rem;
}
.block-card {
  background: var(--surface);
  padding: 1rem;
  border-radius: 8px;
  border: 1px solid var(--border);
  text-decoration: none;
  color: inherit;
  transition: border-color 0.2s;
}
.block-card:hover { border-color: var(--accent); }
.block-num { color: var(--accent); font-size: 0.8rem; }
.block-day { color: var(--muted); font-size: 0.8rem; margin-left: 0.5rem; }
.block-card h3 { margin: 0.5rem 0; font-size: 1rem; }

.code-block {
  margin: 1rem 0;
  background: #0d1117;
  border-radius: 6px;
  overflow: hidden;
  border: 1px solid var(--border);
}
.code-block h4 {
  margin: 0;
  padding: 0.5rem 1rem;
  color: var(--muted);
  font-size: 0.85rem;
  border-bottom: 1px solid var(--border);
}
.code-block pre {
  margin: 0;
  padding: 1rem;
  overflow-x: auto;
  font-family: 'Consolas', 'Monaco', monospace;
  font-size: 0.9rem;
  line-height: 1.5;
}
.code-block code { color: var(--accent2); }

.problem {
  margin: 1rem 0;
  padding: 1rem;
  background: var(--surface);
  border-radius: 6px;
  border-left: 4px solid var(--accent);
}
.hint { margin-top: 0.5rem; color: var(--muted); font-size: 0.9rem; }

details { margin-top: 0.5rem; }
details summary { cursor: pointer; color: var(--accent); font-size: 0.9rem; }
.block-nav {
  margin-top: 2rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border);
  display: flex;
  gap: 1rem;
}
.block-nav a { color: var(--accent); text-decoration: none; }
.block-nav a:hover { text-decoration: underline; }

ul { padding-left: 1.5rem; }
li { margin: 0.5rem 0; }
.week-grid { grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); }

.coursebook-link {
  display: inline-block;
  padding: 1rem 1.5rem;
  background: var(--surface);
  border: 1px solid var(--accent);
  border-radius: 8px;
  color: var(--accent);
  text-decoration: none;
  font-weight: 500;
  margin: 1rem 0;
}
.coursebook-link:hover { background: rgba(88, 166, 255, 0.1); }

.coursebook-container { max-width: 900px; }
.coursebook-header { margin-bottom: 2rem; }
.coursebook-subtitle { color: var(--muted); font-size: 0.95rem; }
.coursebook-content { margin: 2rem 0; }
.coursebook-pre {
  white-space: pre-wrap;
  word-wrap: break-word;
  font-family: 'Consolas', 'Monaco', monospace;
  font-size: 0.85rem;
  line-height: 1.5;
  padding: 1.5rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow-x: auto;
}

.topic-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 1rem; margin-top: 1rem; }
.topic-card { background: var(--surface); padding: 1.25rem; border-radius: 8px; border: 1px solid var(--border); text-decoration: none; color: inherit; transition: border-color 0.2s; }
.topic-card:hover { border-color: var(--accent); }
.topic-icon { font-size: 2rem; display: block; margin-bottom: 0.5rem; }
.topic-header { margin-bottom: 2rem; }
.topic-header .topic-icon { font-size: 2.5rem; }
.topic-list { padding-left: 1.5rem; }
.resource-links { display: flex; flex-direction: column; gap: 0.75rem; }
.resource-links .coursebook-link { display: inline-block; }
.youtube-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); gap: 0.75rem; }
.yt-card { background: var(--surface); padding: 0.75rem; border-radius: 6px; border: 1px solid var(--border); text-decoration: none; color: inherit; display: block; }
.yt-card:hover { border-color: var(--accent); }
.yt-channel { font-size: 0.8rem; color: var(--muted); }
.cheat-grid, .snippet-list, .viz-list { display: flex; flex-direction: column; gap: 1rem; }
.cheat-card, .viz-card { background: var(--surface); padding: 1rem; border-radius: 6px; border: 1px solid var(--border); }
.cheat-pre, .viz-pre { font-size: 0.85rem; white-space: pre-wrap; background: #0d1117; padding: 0.75rem; border-radius: 4px; margin: 0.5rem 0; }
.viz-note { font-size: 0.85rem; color: var(--muted); }
.strategy-box { background: var(--surface); padding: 1rem; border-radius: 6px; border-left: 4px solid var(--accent); }
.assessment-cta { display: inline-block; padding: 0.75rem 1rem; background: var(--accent2); color: var(--bg); border-radius: 6px; text-decoration: none; font-weight: 500; margin-top: 0.5rem; }
.assessment-cta:hover { opacity: 0.9; }
.jobs-grid { display: grid; gap: 1.5rem; }
.job-card { background: var(--surface); padding: 1.25rem; border-radius: 8px; border: 1px solid var(--border); }
.job-salary, .job-demand { color: var(--accent); font-weight: 500; }
.pricing-grid, .comparison-table { display: grid; gap: 1rem; }
.price-card, .comp-card { background: var(--surface); padding: 1.25rem; border-radius: 8px; border: 1px solid var(--border); }
.price { font-size: 1.5rem; color: var(--accent2); }
.limits { color: var(--muted); font-size: 0.9rem; }
.calendar-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: 1rem; }
.calendar-week { background: var(--surface); padding: 1rem; border-radius: 6px; border: 1px solid var(--border); }
.block-checks { display: flex; flex-wrap: wrap; gap: 0.25rem; margin-top: 0.5rem; }
.check-label { font-size: 0.85rem; display: inline-flex; align-items: center; gap: 0.25rem; }
.progress-bar-wrap { height: 24px; background: var(--surface); border-radius: 4px; overflow: hidden; margin: 1rem 0; }
.progress-bar { height: 100%; background: var(--accent2); transition: width 0.3s; }
.strategy-list { display: flex; flex-direction: column; gap: 1rem; }
.strategy-item { background: var(--surface); padding: 1rem; border-radius: 6px; }
.ai-box { background: var(--surface); padding: 1.5rem; border-radius: 8px; border: 1px solid var(--border); }
.ai-chat-section { margin: 2rem 0; }
.chat-messages { max-height: 320px; overflow-y: auto; background: var(--surface); padding: 1rem; border-radius: 6px; margin-bottom: 1rem; border: 1px solid var(--border); }
.chat-msg { margin: 0.5rem 0; }
.chat-user { color: var(--accent); }
.chat-form { display: flex; gap: 0.5rem; margin-top: 0.5rem; }
.chat-form textarea { flex: 1; font-family: inherit; padding: 0.5rem; border-radius: 4px; background: var(--surface); border: 1px solid var(--border); color: var(--text); }
.chat-form button { padding: 0.5rem 1rem; background: var(--accent); color: var(--bg); border: none; border-radius: 4px; cursor: pointer; }
.chat-status { font-size: 0.9rem; color: var(--muted); margin-top: 0.5rem; }
.chat-status.error { color: #f85149; }
.code-help-form { display: flex; flex-direction: column; gap: 0.5rem; }
.code-help-form textarea, .code-help-form input { font-family: monospace; padding: 0.5rem; background: var(--surface); border: 1px solid var(--border); color: var(--text); border-radius: 4px; }
.code-help-reply { margin-top: 1rem; }
.code-help-reply pre { white-space: pre-wrap; }
.ai-note { font-size: 0.85rem; color: var(--muted); margin-top: 1rem; }
.ai-analysis-btn { padding: 0.5rem 1rem; background: var(--accent); color: var(--bg); border: none; border-radius: 4px; cursor: pointer; margin-top: 0.5rem; }
.ai-analysis-result { margin-top: 1rem; padding: 1rem; background: var(--surface); border-radius: 6px; }
.ai-feedback { line-height: 1.6; }
.ai-advice-section, .ai-career-section { margin: 2rem 0; }
.ai-advice-result, .ai-career-result { margin-top: 1rem; }
.benefits-section {
  background: var(--surface);
  padding: 2.5rem 0;
  border-top: 1px solid var(--border);
}
.benefits-headline {
  font-size: 1.85rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
  line-height: 1.3;
}
.benefits-tagline {
  color: var(--muted);
  margin-bottom: 1.5rem;
  font-size: 1.05rem;
}
.benefits-differentiator {
  background: rgba(88, 166, 255, 0.08);
  border-left: 4px solid var(--accent);
  padding: 1.25rem 1.5rem;
  border-radius: 0 8px 8px 0;
  margin-bottom: 2rem;
}
.benefits-differentiator p { margin: 0; }
.benefits-flow {
  margin-bottom: 2rem;
}
.benefits-flow-label {
  font-size: 0.9rem;
  color: var(--muted);
  margin-bottom: 0.5rem;
}
.benefits-flow-steps {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
  font-weight: 500;
}
.benefits-flow-steps span:nth-child(odd) { color: var(--accent); }
.benefits-flow-note {
  margin-top: 0.5rem;
  color: var(--muted);
  font-size: 0.95rem;
}
.benefits-curriculum-title,
.benefits-pricing-title {
  font-size: 1.25rem;
  margin: 2rem 0 1rem 0;
  color: var(--text);
}
.benefits-curriculum {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 1rem;
  margin-bottom: 2rem;
}
.benefits-curriculum-part {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1rem;
}
.part-badge {
  display: inline-block;
  background: var(--accent);
  color: var(--bg);
  font-size: 0.75rem;
  padding: 0.2rem 0.5rem;
  border-radius: 4px;
  font-weight: 600;
  margin-bottom: 0.25rem;
}
.part-weeks {
  display: block;
  color: var(--muted);
  font-size: 0.85rem;
  margin-bottom: 0.5rem;
}
.benefits-curriculum-part p { margin: 0; font-size: 0.9rem; }
.benefits-pricing-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.25rem;
  margin-bottom: 2rem;
}
.benefits-pricing-card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.5rem;
  position: relative;
}
.benefits-pricing-featured {
  border-color: var(--accent);
  box-shadow: 0 0 0 1px rgba(88, 166, 255, 0.3);
}
.featured-badge {
  position: absolute;
  top: -10px;
  right: 1rem;
  background: linear-gradient(135deg, var(--accent), #a78bfa);
  color: var(--bg);
  font-size: 0.7rem;
  padding: 0.25rem 0.6rem;
  border-radius: 20px;
  font-weight: 600;
}
.benefits-pricing-card h4 {
  margin: 0 0 0.75rem 0;
  font-size: 1.15rem;
}
.benefits-pricing-card .price {
  margin: 0 0 0.5rem 0;
  font-size: 1.25rem;
}
.price-main { color: var(--accent2); }
.price-early { color: var(--muted); font-size: 0.9rem; margin-left: 0.5rem; }
.price-desc {
  margin: 0 0 1rem 0;
  color: var(--muted);
  font-size: 0.9rem;
  line-height: 1.4;
}
.benefits-pricing-card ul {
  margin: 0;
  padding-left: 1.25rem;
  font-size: 0.9rem;
  line-height: 1.6;
}
.benefits-pricing-card li { margin: 0.35rem 0; }
.benefits-extras {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  margin-bottom: 1.5rem;
  padding: 1.25rem;
  background: rgba(88, 166, 255, 0.05);
  border-radius: 8px;
  font-size: 0.95rem;
}
.benefits-audience {
  margin-bottom: 1.5rem;
}
.benefits-audience p { margin: 0; }
.benefits-cta {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  margin-bottom: 1rem;
}
.benefits-cta-primary {
  display: inline-block;
  padding: 0.75rem 1.5rem;
  background: var(--accent);
  color: var(--bg) !important;
  border-radius: 8px;
  font-weight: 600;
  text-decoration: none;
}
.benefits-cta-primary:hover { background: #79b8ff; }
.benefits-cta-secondary {
  display: inline-block;
  padding: 0.75rem 1.5rem;
  border: 1px solid var(--accent);
  color: var(--accent);
  border-radius: 8px;
  font-weight: 500;
  text-decoration: none;
}
.benefits-cta-secondary:hover { background: rgba(88, 166, 255, 0.1); }
.benefits-link {
  margin: 0;
  font-size: 0.9rem;
  color: var(--muted);
}
.benefits-link a { color: var(--accent); }

.explore-section {
  background: linear-gradient(180deg, var(--surface) 0%, var(--bg) 100%);
  padding: 2.5rem 0;
  border-top: 1px solid var(--border);
}
.explore-title {
  font-size: 1.75rem;
  margin-bottom: 0.5rem;
  background: linear-gradient(135deg, var(--accent), #a78bfa);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.explore-subtitle {
  color: var(--muted);
  margin-bottom: 2rem;
  max-width: 560px;
}
.explore-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 1.25rem;
  margin-bottom: 2rem;
}
.explore-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.5rem;
  text-decoration: none;
  color: inherit;
  transition: all 0.2s ease;
  display: flex;
  flex-direction: column;
}
.explore-card:hover {
  border-color: var(--accent);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0,0,0,0.2);
}
.explore-card-ai {
  border-color: rgba(88, 166, 255, 0.4);
  background: linear-gradient(135deg, rgba(88, 166, 255, 0.08), rgba(167, 139, 250, 0.06));
}
.explore-card-ai:hover {
  border-color: var(--accent);
}
.explore-icon {
  font-size: 2rem;
  margin-bottom: 0.75rem;
}
.explore-card h3 {
  font-size: 1.1rem;
  margin: 0 0 0.5rem 0;
  color: var(--text);
}
.explore-card p {
  font-size: 0.9rem;
  color: var(--muted);
  line-height: 1.5;
  margin: 0;
  flex-grow: 1;
}
.explore-cta {
  display: inline-block;
  margin-top: 1rem;
  font-size: 0.85rem;
  color: var(--accent);
  font-weight: 500;
}
.explore-card:hover .explore-cta { text-decoration: underline; }
.explore-ai-banner {
  background: linear-gradient(135deg, rgba(88, 166, 255, 0.15), rgba(167, 139, 250, 0.1));
  border: 1px solid rgba(88, 166, 255, 0.3);
  border-radius: 12px;
  padding: 1.5rem 2rem;
}
.explore-ai-banner-inner {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  flex-wrap: wrap;
}
.explore-ai-banner-icon {
  font-size: 2.5rem;
}
.explore-ai-banner-inner h4 {
  margin: 0 0 0.25rem 0;
  font-size: 1.1rem;
}
.explore-ai-banner-inner p {
  margin: 0;
  color: var(--muted);
  font-size: 0.9rem;
}
.explore-ai-banner-btn {
  margin-left: auto;
  padding: 0.75rem 1.5rem;
  background: var(--accent);
  color: var(--bg) !important;
  border-radius: 8px;
  font-weight: 600;
  text-decoration: none;
  white-space: nowrap;
}
.explore-ai-banner-btn:hover {
  background: #79b8ff;
}

.trailer-wrapper { position: relative; width: 100%; }
.skip-trailer {
  position: absolute; top: 12px; right: 16px; z-index: 10;
  padding: 8px 16px; background: rgba(0,0,0,0.6); color: #e6edf3;
  border-radius: 6px; text-decoration: none; font-size: 0.9rem;
  border: 1px solid rgba(255,255,255,0.2);
}
.skip-trailer:hover { background: rgba(0,0,0,0.8); color: #58a6ff; }
.course-trailer-iframe {
  width: 100%; height: 520px; border: none; display: block;
}
.aq-question { margin: 1.5rem 0; }
.aq-options label { display: block; margin: 0.5rem 0; }
.aq-question textarea { width: 100%; font-family: monospace; }
.hidden { display: none !important; }

@media (max-width: 600px) {
  .container { padding: 1rem; }
  .top-nav { padding: 1rem; }
}