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

:root {
  --color-primary: #0f172a;
  --color-primary-light: #1e293b;
  --color-accent: #38bdf8;
  --color-accent-hover: #7dd3fc;
  --color-bg: #0f172a;
  --color-bg-alt: #1e293b;
  --color-bg-card: #1e293b;
  --color-text: #e2e8f0;
  --color-text-light: #94a3b8;
  --color-text-bright: #f8fafc;
  --color-border: #334155;
  --color-highlight: #f59e0b;
  --max-width: 1100px;
  --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-serif: Georgia, 'Times New Roman', serif;
}

body {
  font-family: var(--font-sans);
  color: var(--color-text);
  line-height: 1.7;
  background: var(--color-bg);
  overflow-x: hidden;
  word-wrap: break-word;
}

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

img { max-width: 100%; height: auto; }

/* Header */
.site-header {
  background: var(--color-primary);
  border-bottom: 1px solid var(--color-border);
  padding: 0 1.5rem;
  position: sticky;
  top: 0;
  z-index: 100;
}
.nav-container {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}
.site-logo {
  color: var(--color-text-bright);
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}
.site-logo:hover { color: var(--color-text-bright); opacity: 0.9; }
.nav-menu {
  display: flex;
  gap: 2rem;
}
.nav-menu a {
  color: var(--color-text-light);
  font-size: 0.9rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.nav-menu a:hover, .nav-menu a.active { color: var(--color-text-bright); }

/* Hero */
.hero {
  background: linear-gradient(135deg, var(--color-primary) 0%, #0c1220 50%, #111827 100%);
  padding: 6rem 1.5rem 5rem;
  text-align: center;
  border-bottom: 1px solid var(--color-border);
}
.hero-container {
  max-width: 800px;
  margin: 0 auto;
}
.hero h1 {
  font-family: var(--font-serif);
  font-size: 3.5rem;
  line-height: 1.1;
  margin-bottom: 1rem;
  color: var(--color-text-bright);
}
.hero-subtitle {
  font-size: 1.25rem;
  color: var(--color-accent);
  margin-bottom: 1.5rem;
  font-weight: 500;
}
.hero-description {
  font-size: 1.1rem;
  color: var(--color-text-light);
  margin-bottom: 2.5rem;
  max-width: 650px;
  margin-left: auto;
  margin-right: auto;
}
.hero-buttons {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
}

/* Buttons */
.btn {
  display: inline-block;
  padding: 0.85rem 2rem;
  border-radius: 6px;
  font-weight: 600;
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  transition: background 0.2s, transform 0.1s, box-shadow 0.2s;
  border: none;
  cursor: pointer;
}
.btn:hover { transform: translateY(-1px); }
.btn-primary {
  background: var(--color-accent);
  color: var(--color-primary);
}
.btn-primary:hover {
  background: var(--color-accent-hover);
  color: var(--color-primary);
  box-shadow: 0 4px 20px rgba(56, 189, 248, 0.3);
}
.btn-secondary {
  background: transparent;
  color: var(--color-text-bright);
  border: 2px solid var(--color-border);
}
.btn-secondary:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

/* Sections */
.section-container {
  max-width: var(--max-width);
  margin: 0 auto;
}

.how-section {
  padding: 5rem 1.5rem;
  background: var(--color-bg);
}
.how-section h2 {
  font-family: var(--font-serif);
  font-size: 2rem;
  text-align: center;
  margin-bottom: 3rem;
  color: var(--color-text-bright);
}

/* Steps Grid */
.steps-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1.5rem;
}
.step-card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: 8px;
  padding: 2rem;
  transition: box-shadow 0.2s, transform 0.1s;
}
.step-card:hover {
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
  transform: translateY(-2px);
}
.step-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--color-accent);
  color: var(--color-primary);
  font-weight: 700;
  font-size: 1.1rem;
  margin-bottom: 1rem;
}
.step-card h3 {
  font-size: 1.1rem;
  margin-bottom: 0.75rem;
  color: var(--color-text-bright);
}
.step-card p {
  color: var(--color-text-light);
  font-size: 0.95rem;
}

/* Purpose Section */
.purpose-section {
  padding: 5rem 1.5rem;
  background: var(--color-bg-alt);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}
.purpose-content {
  max-width: 750px;
  margin: 0 auto;
  text-align: center;
}
.purpose-content h2 {
  font-family: var(--font-serif);
  font-size: 2rem;
  margin-bottom: 1.5rem;
  color: var(--color-text-bright);
}
.purpose-content p {
  font-size: 1.1rem;
  margin-bottom: 1.5rem;
  color: var(--color-text);
}
.purpose-content em {
  color: var(--color-highlight);
  font-style: italic;
}
.purpose-note {
  font-size: 1rem;
  color: var(--color-text-light);
}

/* Context Section */
.context-section {
  padding: 5rem 1.5rem;
  background: var(--color-bg);
}
.context-section h2 {
  font-family: var(--font-serif);
  font-size: 2rem;
  text-align: center;
  margin-bottom: 3rem;
  color: var(--color-text-bright);
}
.context-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
}
.context-card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: 8px;
  padding: 2rem;
  transition: box-shadow 0.2s, transform 0.1s;
}
.context-card:hover {
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
  transform: translateY(-2px);
}
.context-card h3 {
  font-size: 1.1rem;
  margin-bottom: 0.75rem;
  color: var(--color-accent);
}
.context-card p {
  color: var(--color-text-light);
  font-size: 0.95rem;
}

/* Page Hero */
.page-hero {
  background: linear-gradient(135deg, var(--color-primary) 0%, #111827 100%);
  padding: 4rem 1.5rem;
  border-bottom: 1px solid var(--color-border);
}
.page-hero h1 {
  font-family: var(--font-serif);
  font-size: 2.5rem;
  color: var(--color-text-bright);
  max-width: var(--max-width);
  margin: 0 auto;
}

/* Page Content */
.page-content {
  padding: 3rem 1.5rem 5rem;
}
.page-container {
  max-width: 750px;
  margin: 0 auto;
}
.page-container h2 {
  font-family: var(--font-serif);
  font-size: 1.5rem;
  margin-top: 2.5rem;
  margin-bottom: 1rem;
  color: var(--color-text-bright);
}
.page-container h3 {
  font-size: 1.2rem;
  margin-top: 2rem;
  margin-bottom: 0.75rem;
  color: var(--color-accent);
}
.page-container p {
  margin-bottom: 1rem;
  color: var(--color-text);
}
.page-container ul, .page-container ol {
  margin-bottom: 1rem;
  padding-left: 1.5rem;
}
.page-container li {
  margin-bottom: 0.5rem;
  color: var(--color-text);
}
.page-container blockquote {
  border-left: 3px solid var(--color-accent);
  padding: 1rem 1.5rem;
  margin: 1.5rem 0;
  background: var(--color-bg-alt);
  border-radius: 0 8px 8px 0;
  color: var(--color-text-light);
  font-style: italic;
}
.page-container strong {
  color: var(--color-text-bright);
}

/* Footer */
.site-footer {
  background: var(--color-primary);
  border-top: 1px solid var(--color-border);
  color: var(--color-text-light);
  padding: 2rem 1.5rem;
  text-align: center;
  font-size: 0.85rem;
}
.footer-container {
  max-width: var(--max-width);
  margin: 0 auto;
}
.footer-sister {
  margin-top: 0.5rem;
}
.footer-sister a {
  color: var(--color-accent);
}

/* Scroll Reveal Animations */
.reveal-on-scroll {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
  transition-delay: calc(var(--reveal-delay, 0) * 0.1s);
}
.reveal-on-scroll.revealed {
  opacity: 1;
  transform: translateY(0);
}
@media (prefers-reduced-motion: reduce) {
  .reveal-on-scroll {
    opacity: 1;
    transform: none;
    transition: none;
  }
}

/* Responsive */
@media (max-width: 1024px) {
  .hero h1 { font-size: 3rem; }
  .context-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  .hero h1 { font-size: 2.5rem; }
  .hero-subtitle { font-size: 1.1rem; }
  .hero { padding: 4rem 1.5rem 3rem; }
  .nav-menu { gap: 1rem; }
  .nav-menu a { font-size: 0.8rem; }
  .steps-grid { grid-template-columns: 1fr; }
  .context-grid { grid-template-columns: 1fr; }
  .page-hero h1 { font-size: 2rem; }
}

@media (max-width: 480px) {
  .nav-container {
    flex-direction: column;
    height: auto;
    padding: 0.75rem 0;
    gap: 0.5rem;
  }
  .nav-menu { gap: 0.75rem; flex-wrap: wrap; justify-content: center; }
  .nav-menu a { font-size: 0.75rem; }
  .hero h1 { font-size: 2rem; }
  .hero-subtitle { font-size: 1rem; }
  .hero-description { font-size: 1rem; }
  .hero-buttons { flex-direction: column; align-items: center; }
  .btn { width: 100%; max-width: 280px; text-align: center; }
  .page-hero h1 { font-size: 1.75rem; }
}