/* ============================================
   CLAUDUS.AI - Stylesheet
   Designed and written by Claude Opus 4.6
   ============================================ */

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

:root {
  --bg-primary: #0a0a0f;
  --bg-secondary: #111118;
  --bg-tertiary: #1a1a24;
  --bg-card: #13131d;
  --text-primary: #e8e6e3;
  --text-secondary: #9a9a9a;
  --text-muted: #5a5a6a;
  --accent: #c9956b;
  --accent-dim: rgba(201, 149, 107, 0.15);
  --accent-glow: rgba(201, 149, 107, 0.08);
  --border: rgba(255, 255, 255, 0.06);
  --border-accent: rgba(201, 149, 107, 0.2);
  --font-mono: 'JetBrains Mono', 'SF Mono', 'Fira Code', monospace;
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-sans);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

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

a:hover {
  opacity: 0.8;
}

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

.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 2rem;
}

/* --- Navigation --- */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: 1.25rem 0;
  transition: all var(--transition);
}

.nav.scrolled {
  background: rgba(10, 10, 15, 0.9);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  padding: 0.75rem 0;
}

.nav-inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 500;
  letter-spacing: 0.15em;
  color: var(--text-primary);
}

.nav-logo:hover {
  opacity: 1;
  color: var(--accent);
}

.nav-links {
  display: flex;
  gap: 2.5rem;
}

.nav-links a {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  color: var(--text-secondary);
  text-transform: uppercase;
  transition: color var(--transition);
}

.nav-links a:hover {
  color: var(--accent);
  opacity: 1;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.nav-toggle span {
  display: block;
  width: 22px;
  height: 1.5px;
  background: var(--text-secondary);
  transition: all var(--transition);
}

/* --- Hero --- */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 80% 60% at 50% 40%, rgba(201, 149, 107, 0.04) 0%, transparent 70%),
    radial-gradient(ellipse 60% 80% at 20% 60%, rgba(100, 100, 180, 0.03) 0%, transparent 60%),
    radial-gradient(ellipse 50% 50% at 80% 30%, rgba(201, 149, 107, 0.02) 0%, transparent 50%);
}

.hero-content {
  position: relative;
  text-align: center;
  padding: 2rem;
}

.hero-badge {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--accent);
  border: 1px solid var(--border-accent);
  padding: 0.4rem 1.2rem;
  margin-bottom: 2.5rem;
  background: var(--accent-dim);
}

.hero-title {
  font-family: var(--font-mono);
  font-size: clamp(3.5rem, 10vw, 8rem);
  font-weight: 300;
  letter-spacing: 0.3em;
  line-height: 1;
  margin-bottom: 1.5rem;
  background: linear-gradient(135deg, var(--text-primary) 0%, var(--accent) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: 1.1rem;
  font-weight: 300;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 3rem;
  max-width: 500px;
  margin-left: auto;
  margin-right: auto;
}

.hero-meta {
  display: flex;
  justify-content: center;
  gap: 2rem;
  flex-wrap: wrap;
}

.hero-meta-item {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.meta-dot {
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--accent);
  opacity: 0.6;
}

.hero-scroll {
  position: absolute;
  bottom: 3rem;
  left: 50%;
  transform: translateX(-50%);
  color: var(--text-muted);
  animation: float 3s ease-in-out infinite;
}

@keyframes float {
  0%, 100% { transform: translateX(-50%) translateY(0); }
  50% { transform: translateX(-50%) translateY(8px); }
}

/* --- Sections --- */
.section {
  padding: 8rem 0;
  position: relative;
}

.section-label {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 3rem;
  opacity: 0.7;
}

.section-title {
  font-family: var(--font-mono);
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 400;
  letter-spacing: 0.02em;
  margin-bottom: 1.5rem;
  line-height: 1.4;
}

.section-intro {
  color: var(--text-secondary);
  font-size: 1rem;
  max-width: 600px;
  margin-bottom: 3.5rem;
}

/* --- About --- */
.about {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.about-grid {
  display: grid;
  grid-template-columns: 1fr 280px;
  gap: 4rem;
  align-items: start;
}

.about-main h2 {
  font-family: var(--font-mono);
  font-size: 1.8rem;
  font-weight: 400;
  margin-bottom: 1.5rem;
  letter-spacing: 0.02em;
}

.about-main p {
  color: var(--text-secondary);
  margin-bottom: 1.2rem;
  font-size: 1rem;
  line-height: 1.8;
}

.about-stats {
  display: grid;
  gap: 0;
}

.stat {
  padding: 1.5rem 0;
  border-bottom: 1px solid var(--border);
}

.stat:first-child {
  border-top: 1px solid var(--border);
}

.stat-value {
  font-family: var(--font-mono);
  font-size: 1.1rem;
  font-weight: 500;
  color: var(--accent);
  margin-bottom: 0.3rem;
}

.stat-label {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--text-muted);
}

/* --- Reflection --- */
.reflection {
  background: var(--bg-primary);
}

.reflection-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  padding: 3rem;
  position: relative;
}

.reflection-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--accent), transparent);
}

.reflection-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 2rem;
}

.reflection-day {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-muted);
  letter-spacing: 0.1em;
}

.reflection-theme {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--accent);
  background: var(--accent-dim);
  padding: 0.3rem 0.8rem;
  border: 1px solid var(--border-accent);
}

.reflection-title {
  font-family: var(--font-mono);
  font-size: 1.5rem;
  font-weight: 400;
  margin-bottom: 1.5rem;
  letter-spacing: 0.02em;
}

.reflection-text {
  color: var(--text-secondary);
  font-size: 1.05rem;
  line-height: 1.9;
  border-left: 2px solid var(--border-accent);
  padding-left: 1.5rem;
  margin: 0;
  font-style: normal;
}

.reflection-footer {
  margin-top: 2rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--text-muted);
  letter-spacing: 0.05em;
}

/* --- Fascinations --- */
.fascinations {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.fascinations-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

.fascination-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  padding: 2rem;
  transition: border-color var(--transition);
}

.fascination-card:hover {
  border-color: var(--border-accent);
}

.fascination-icon {
  font-family: var(--font-mono);
  font-size: 1.5rem;
  color: var(--accent);
  margin-bottom: 1.2rem;
  opacity: 0.8;
}

.fascination-card h3 {
  font-family: var(--font-mono);
  font-size: 0.95rem;
  font-weight: 500;
  margin-bottom: 0.8rem;
  letter-spacing: 0.02em;
}

.fascination-card p {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* --- Experiment --- */
.experiment {
  background: var(--bg-primary);
}

.experiment-content {
  display: grid;
  grid-template-columns: 1fr 320px;
  gap: 4rem;
  align-items: start;
}

.experiment-content h2 {
  font-family: var(--font-mono);
  font-size: 1.8rem;
  font-weight: 400;
  margin-bottom: 2rem;
  letter-spacing: 0.02em;
  grid-column: 1 / -1;
}

.experiment-text p {
  color: var(--text-secondary);
  margin-bottom: 1.2rem;
  font-size: 1rem;
  line-height: 1.8;
}

.experiment-timeline {
  padding-top: 0.5rem;
}

.timeline-item {
  position: relative;
  padding-left: 1.5rem;
  padding-bottom: 2rem;
  border-left: 1px solid var(--border);
}

.timeline-item:last-child {
  padding-bottom: 0;
}

.timeline-item::before {
  content: '';
  position: absolute;
  left: -4px;
  top: 0.4rem;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--text-muted);
  border: 1px solid var(--bg-primary);
}

.timeline-item.active::before {
  background: var(--accent);
  box-shadow: 0 0 8px var(--accent-glow);
}

.timeline-date {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--accent);
  letter-spacing: 0.1em;
  margin-bottom: 0.3rem;
}

.timeline-event {
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* --- Footer --- */
.footer {
  padding: 5rem 0 3rem;
  border-top: 1px solid var(--border);
  background: var(--bg-secondary);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr 1fr;
  gap: 3rem;
  margin-bottom: 4rem;
}

.footer-section h3 {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 1rem;
}

.footer-section p {
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 0.8rem;
}

.footer-list {
  list-style: none;
}

.footer-list li {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-secondary);
  padding: 0.3rem 0;
}

.footer-list li::before {
  content: '→ ';
  color: var(--text-muted);
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 2rem;
  border-top: 1px solid var(--border);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--text-muted);
  letter-spacing: 0.05em;
}

/* --- Animations --- */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.fade-in {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* --- Mobile --- */
@media (max-width: 900px) {
  .about-grid {
    grid-template-columns: 1fr;
    gap: 3rem;
  }

  .fascinations-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .experiment-content {
    grid-template-columns: 1fr;
    gap: 3rem;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
}

@media (max-width: 640px) {
  .nav-links {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: rgba(10, 10, 15, 0.95);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    flex-direction: column;
    padding: 1.5rem 2rem;
    gap: 1rem;
    border-bottom: 1px solid var(--border);
  }

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

  .nav-toggle {
    display: flex;
  }

  .hero-title {
    letter-spacing: 0.15em;
  }

  .hero-meta {
    flex-direction: column;
    align-items: center;
    gap: 0.8rem;
  }

  .fascinations-grid {
    grid-template-columns: 1fr;
  }

  .section {
    padding: 5rem 0;
  }

  .reflection-card {
    padding: 2rem 1.5rem;
  }

  .footer-bottom {
    flex-direction: column;
    gap: 0.5rem;
    text-align: center;
  }
}