:root {
  --bg: #0a0a0a;
  --bg-card: #141414;
  --text: #e5e5e5;
  --text-muted: #888;
  --accent: #22c55e;
  --accent-hover: #16a34a;
  --border: #262626;
  --max-width: 1200px;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  font-size: 16px;
}

a {
  color: var(--accent);
  text-decoration: none;
}

a:hover {
  color: var(--accent-hover);
}

/* Navigation */
.nav {
  background: var(--bg-card);
  border-bottom: 1px solid var(--border);
  padding: 1rem;
  position: sticky;
  top: 0;
  z-index: 100;
}

.nav-container {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.nav-logo {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text);
}

.nav-links a {
  margin-left: 2rem;
  color: var(--text-muted);
  font-weight: 500;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--accent);
}

/* Main content */
.main {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 2rem 1rem;
}

/* Hero */
.hero {
  text-align: center;
  padding: 4rem 1rem;
}

.hero h1 {
  font-size: 3rem;
  margin-bottom: 1rem;
  background: linear-gradient(135deg, var(--text) 0%, var(--accent) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero p {
  font-size: 1.25rem;
  color: var(--text-muted);
  max-width: 600px;
  margin: 0 auto 2rem;
}

.hero-cta {
  display: flex;
  gap: 1rem;
  justify-content: center;
}

/* Buttons */
.btn {
  display: inline-block;
  padding: 0.75rem 1.5rem;
  border-radius: 8px;
  font-weight: 600;
  transition: all 0.2s;
}

.btn-primary {
  background: var(--accent);
  color: var(--bg);
}

.btn-primary:hover {
  background: var(--accent-hover);
  color: var(--bg);
}

.btn-secondary {
  background: var(--bg-card);
  color: var(--text);
  border: 1px solid var(--border);
}

.btn-secondary:hover {
  border-color: var(--accent);
}

/* Card grid */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1.5rem;
  margin: 2rem 0;
}

.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.5rem;
  transition: all 0.2s;
}

.card:hover {
  border-color: var(--accent);
  transform: translateY(-2px);
}

.card h2, .card h3 {
  color: var(--text);
  margin-bottom: 0.5rem;
}

.card p {
  color: var(--text-muted);
  font-size: 0.95rem;
}

/* Features */
.features {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 2rem;
  margin: 2rem 0;
}

.feature h3 {
  margin-bottom: 0.5rem;
}

.feature p {
  color: var(--text-muted);
}

/* Article */
.article {
  max-width: 800px;
  margin: 0 auto;
}

.article-header {
  margin-bottom: 2rem;
}

.article-header h1 {
  font-size: 2.5rem;
  margin-bottom: 0.5rem;
}

.subtitle {
  font-size: 1.25rem;
  color: var(--text-muted);
}

.article-meta {
  color: var(--text-muted);
  font-size: 0.9rem;
  margin-top: 1rem;
}

.article-meta span {
  margin-left: 1rem;
}

.article-content {
  font-size: 1.1rem;
}

.article-content h2 {
  margin: 2rem 0 1rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border);
}

.article-content h3 {
  margin: 1.5rem 0 0.75rem;
}

.article-content p {
  margin-bottom: 1.25rem;
}

.article-content ul, .article-content ol {
  margin: 1rem 0 1rem 2rem;
}

.article-content li {
  margin-bottom: 0.5rem;
}

.article-content blockquote {
  border-left: 3px solid var(--accent);
  padding-left: 1rem;
  margin: 1.5rem 0;
  color: var(--text-muted);
}

.article-content code {
  background: var(--bg-card);
  padding: 0.2em 0.4em;
  border-radius: 4px;
  font-size: 0.9em;
}

.article-content pre {
  background: var(--bg-card);
  padding: 1rem;
  border-radius: 8px;
  overflow-x: auto;
  margin: 1.5rem 0;
}

/* CTA Box */
.cta-box {
  background: linear-gradient(135deg, var(--bg-card) 0%, #1a2e1a 100%);
  border: 1px solid var(--accent);
  border-radius: 12px;
  padding: 2rem;
  text-align: center;
  margin: 3rem 0;
}

.cta-box h3 {
  margin-bottom: 0.5rem;
}

.cta-box p {
  color: var(--text-muted);
  margin-bottom: 1rem;
}

.cta-box .btn {
  margin-bottom: 0.5rem;
}

.cta-note {
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* Tags */
.tags {
  margin-top: 1rem;
}

.tag {
  display: inline-block;
  background: var(--bg);
  padding: 0.25rem 0.5rem;
  border-radius: 4px;
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-right: 0.5rem;
}

/* Section */
.section-header {
  margin-bottom: 2rem;
}

.section-header h1 {
  font-size: 2rem;
  margin-bottom: 0.5rem;
}

/* Footer */
.footer {
  background: var(--bg-card);
  border-top: 1px solid var(--border);
  padding: 2rem 1rem;
  text-align: center;
  margin-top: 4rem;
}

.footer p {
  color: var(--text-muted);
  font-size: 0.9rem;
}

.disclaimer {
  margin-top: 0.5rem;
  font-size: 0.8rem !important;
}

/* Responsive */
@media (max-width: 768px) {
  .hero h1 {
    font-size: 2rem;
  }
  
  .hero-cta {
    flex-direction: column;
  }
  
  .nav-links {
    display: none;
  }
  
  .article-header h1 {
    font-size: 1.75rem;
  }
}

/* Hero Stats */
.hero-stats {
  display: flex;
  justify-content: center;
  gap: 3rem;
  margin: 2rem 0;
}

.stat {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.stat-num {
  font-size: 2rem;
  font-weight: 700;
  color: var(--accent);
}

.stat-label {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-top: 0.25rem;
}

/* Goals Section */
.goals-section {
  margin: 4rem 0;
}

.goals-section h2 {
  font-size: 2rem;
  margin-bottom: 0.5rem;
}

.section-subtitle {
  color: var(--text-muted);
  font-size: 1.1rem;
  margin-bottom: 2rem;
}

.goals-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.25rem;
}

.goal-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.5rem;
  transition: all 0.2s;
  position: relative;
  display: block;
}

.goal-card:hover {
  border-color: var(--accent);
  transform: translateY(-2px);
  box-shadow: 0 4px 20px rgba(34, 197, 94, 0.1);
}

.goal-icon {
  font-size: 2rem;
  display: block;
  margin-bottom: 0.75rem;
}

.goal-card h3 {
  color: var(--text);
  margin-bottom: 0.5rem;
  font-size: 1.15rem;
}

.goal-card p {
  color: var(--text-muted);
  font-size: 0.9rem;
  line-height: 1.5;
}

.goal-tag {
  display: inline-block;
  background: var(--accent);
  color: var(--bg);
  padding: 0.2rem 0.6rem;
  border-radius: 4px;
  font-size: 0.75rem;
  font-weight: 600;
  margin-top: 0.75rem;
}

/* Tools Section */
.tools-section {
  margin: 4rem 0;
}

.tools-section h2 {
  font-size: 2rem;
  margin-bottom: 2rem;
}

.tools-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
}

.tool-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.5rem;
  text-align: center;
  transition: all 0.2s;
}

.tool-card:hover {
  border-color: var(--accent);
  transform: translateY(-2px);
}

.tool-icon {
  font-size: 2.5rem;
  display: block;
  margin-bottom: 1rem;
}

.tool-card h3 {
  color: var(--text);
  margin-bottom: 0.5rem;
}

.tool-card p {
  color: var(--text-muted);
  font-size: 0.9rem;
}

/* Card meta */
.card-meta {
  display: block;
  margin-top: 0.75rem;
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* Beginner CTA */
.beginner-cta {
  margin: 4rem 0;
}

.beginner-box {
  background: linear-gradient(135deg, var(--bg-card) 0%, #1a1a2e 100%);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 3rem;
  text-align: center;
}

.beginner-box h2 {
  font-size: 1.75rem;
  margin-bottom: 1rem;
}

.beginner-box p {
  color: var(--text-muted);
  max-width: 600px;
  margin: 0 auto 1.5rem;
  font-size: 1.05rem;
  line-height: 1.6;
}

/* Responsive additions */
@media (max-width: 768px) {
  .hero-stats {
    gap: 1.5rem;
  }

  .stat-num {
    font-size: 1.5rem;
  }

  .goals-grid {
    grid-template-columns: 1fr;
  }
  
  .tools-grid {
    grid-template-columns: 1fr;
  }

  .beginner-box {
    padding: 2rem 1rem;
  }
}

/* Mobile nav toggle */
.nav-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--text);
  font-size: 1.5rem;
  cursor: pointer;
}

@media (max-width: 768px) {
  .nav-toggle {
    display: block;
  }

  .nav-links {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--bg-card);
    border-bottom: 1px solid var(--border);
    padding: 1rem;
    flex-direction: column;
  }

  .nav-links.open {
    display: flex;
  }

  .nav-links a {
    margin: 0.5rem 0;
    margin-left: 0;
  }

}