/* ═══════════════════════════════════════
   PLAYA NEURAL — Design System
   ═══════════════════════════════════════ */

:root {
  --bg-deep: #0a0a0f;
  --bg-surface: #0d1117;
  --amber: #e8a849;
  --amber-glow: rgba(232, 168, 73, 0.15);
  --green: #3ecf8e;
  --green-glow: rgba(62, 207, 142, 0.1);
  --indigo: #6366f1;
  --indigo-glow: rgba(99, 102, 241, 0.12);
  --text-primary: #e2e0dc;
  --text-muted: #6b6860;
  --font-mono: 'JetBrains Mono', monospace;
  --font-serif: 'Newsreader', Georgia, serif;
}

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

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  background: var(--bg-deep);
  color: var(--text-primary);
  font-family: var(--font-serif);
  font-size: clamp(16px, 1.2vw, 20px);
  line-height: 1.6;
  overflow-x: hidden;
}

/* Film grain overlay */
body::after {
  content: '';
  position: fixed;
  inset: 0;
  z-index: 9999;
  pointer-events: none;
  opacity: 0.025;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  background-repeat: repeat;
  background-size: 200px;
}

/* Subtle radial vignette */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background: radial-gradient(ellipse at center, transparent 40%, rgba(0, 0, 0, 0.4) 100%);
}

/* ── Canvas ── */
#particle-canvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  pointer-events: none;
}

/* ── Layout ── */
.section {
  position: relative;
  z-index: 1;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  padding: 8rem 2rem;
}

.container {
  max-width: 900px;
  width: 100%;
  margin: 0 auto;
}

/* ── Section Labels ── */
.section-label {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 400;
  letter-spacing: 0.3em;
  color: var(--amber);
  margin-bottom: 3rem;
  text-transform: uppercase;
}

/* ═══════════════════════════════════════
   HERO
   ═══════════════════════════════════════ */
.hero {
  position: relative;
  z-index: 1;
  height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
}

.hero-content {
  position: relative;
}

.hero-label {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 300;
  letter-spacing: 0.4em;
  color: var(--text-muted);
  margin-bottom: 2.5rem;
  text-transform: uppercase;
  opacity: 0;
  animation: fadeSlideUp 0.8s 0.2s ease forwards;
}

.hero-title {
  font-family: var(--font-mono);
  font-size: clamp(1.8rem, 4.5vw, 3.8rem);
  font-weight: 300;
  line-height: 1.3;
  color: var(--text-primary);
  min-height: 2.6em;
}

.hero-title .char {
  display: inline-block;
  opacity: 0;
  transform: translateY(4px);
  animation: charReveal 0.15s ease forwards;
}

.hero-title .space {
  width: 0.3em;
}

@keyframes charReveal {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.hero-separator {
  width: 60px;
  height: 1px;
  background: var(--amber);
  margin: 2.5rem auto;
  opacity: 0;
  transform: scaleX(0);
  animation: separatorReveal 0.6s 2s ease forwards;
}

@keyframes separatorReveal {
  to {
    opacity: 1;
    transform: scaleX(1);
  }
}

.hero-scroll {
  font-family: var(--font-mono);
  font-size: 1.2rem;
  color: var(--text-muted);
  opacity: 0;
  animation: fadeIn 0.6s 2.4s forwards;
}

.hero-scroll::after {
  content: '';
  display: block;
  width: 1px;
  height: 40px;
  background: linear-gradient(to bottom, var(--text-muted), transparent);
  margin: 1rem auto 0;
  animation: pulse 3s 2.4s ease-in-out infinite;
}

@keyframes fadeIn {
  to { opacity: 0.6; }
}

@keyframes fadeSlideUp {
  to {
    opacity: 1;
    transform: translateY(0);
  }
  from {
    opacity: 0;
    transform: translateY(10px);
  }
}

@keyframes pulse {
  0%, 100% { opacity: 0.3; }
  50% { opacity: 0.8; }
}

/* ═══════════════════════════════════════
   PHILOSOPHY
   ═══════════════════════════════════════ */
.philosophy {
  min-height: 80vh;
}

.philosophy blockquote {
  font-family: var(--font-serif);
  font-size: clamp(1.3rem, 2.8vw, 2.1rem);
  font-weight: 300;
  font-style: italic;
  line-height: 1.6;
  color: var(--text-primary);
  max-width: 680px;
  margin: 0 auto;
  text-align: center;
  border: none;
  padding: 0;
  position: relative;
}

.philosophy blockquote::before {
  content: '\201C';
  font-family: var(--font-serif);
  font-size: 6rem;
  color: var(--amber);
  opacity: 0.15;
  position: absolute;
  top: -3rem;
  left: -1.5rem;
  line-height: 1;
}

/* ═══════════════════════════════════════
   INTERESTS
   ═══════════════════════════════════════ */
.interests {
  min-height: auto;
  padding: 6rem 2rem 8rem;
}

/* Essay container */
.interest-essay {
  max-width: 600px;
  margin: 0 auto 2rem;
  max-height: 0;
  overflow: hidden;
  opacity: 0;
  transition: max-height 0.5s cubic-bezier(0.25, 0.46, 0.45, 0.94),
              opacity 0.35s ease,
              margin 0.4s ease;
}

.interest-essay.visible {
  opacity: 1;
  margin: 0 auto 2.5rem;
}

.interest-essay.dimmed {
  opacity: 0.1;
}

.interest-essay-text {
  font-family: var(--font-serif);
  font-size: clamp(0.95rem, 1.1vw, 1.1rem);
  font-style: italic;
  color: var(--text-muted);
  text-align: center;
  line-height: 1.75;
  padding: 1.5rem 1rem 0.5rem;
}

/* Text fade-out for cross-fade transitions */
.interest-essay-text {
  transition: opacity 0.25s ease, filter 0.25s ease;
}

.interest-essay-text.fading {
  opacity: 0;
  filter: blur(3px);
}

/* Word-by-word reveal */
.essay-word {
  display: inline;
  opacity: 0;
  filter: blur(4px);
  animation: wordReveal 0.4s ease forwards;
}

@keyframes wordReveal {
  to {
    opacity: 1;
    filter: blur(0);
  }
}

.interest-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  justify-content: center;
  max-width: 700px;
  margin: 0 auto;
}

.interest-node {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 400;
  letter-spacing: 0.04em;
  color: var(--text-primary);
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid rgba(255, 255, 255, 0.07);
  padding: 0.75rem 1.5rem;
  border-radius: 2px;
  cursor: pointer;
  transition: all 0.35s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  position: relative;
  outline: none;
}

.interest-node:focus-visible {
  outline: 1px solid var(--amber);
  outline-offset: 3px;
}

.interest-node:hover,
.interest-node.active {
  border-color: var(--amber);
  color: var(--amber);
  background: var(--amber-glow);
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(232, 168, 73, 0.12),
              0 0 0 1px rgba(232, 168, 73, 0.1);
}

.interest-node.related {
  border-color: var(--green);
  color: var(--green);
  background: var(--green-glow);
  transform: translateY(-1px);
  box-shadow: 0 4px 20px rgba(62, 207, 142, 0.1);
}

.interest-node.accent {
  border-color: rgba(99, 102, 241, 0.25);
  color: var(--indigo);
}

.interest-node.accent:hover,
.interest-node.accent.active {
  border-color: var(--indigo);
  color: var(--indigo);
  background: var(--indigo-glow);
  box-shadow: 0 8px 30px rgba(99, 102, 241, 0.12),
              0 0 0 1px rgba(99, 102, 241, 0.1);
}

/* ═══════════════════════════════════════
   PHOTO
   ═══════════════════════════════════════ */
.photo-section {
  min-height: auto;
  padding: 4rem 2rem 6rem;
}

.photo-wrapper {
  position: relative;
  max-width: 650px;
  width: 100%;
  margin: 0 auto;
  overflow: hidden;
  border-radius: 2px;
  line-height: 0;
}

.photo-img {
  width: 100%;
  display: block;
  filter: grayscale(0.6) contrast(1.1) brightness(0.9);
  transition: filter 0.6s ease;
}

.photo-wrapper:hover .photo-img {
  filter: grayscale(0.3) contrast(1.05) brightness(0.95);
}

.photo-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    135deg,
    rgba(232, 168, 73, 0.25) 0%,
    rgba(10, 10, 15, 0.45) 100%
  );
  z-index: 1;
  pointer-events: none;
  transition: opacity 0.6s ease;
}

.photo-wrapper:hover .photo-overlay {
  opacity: 0.7;
}

.photo-caption {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--text-muted);
  text-align: center;
  margin-top: 1.2rem;
  letter-spacing: 0.15em;
  text-transform: lowercase;
}

/* ═══════════════════════════════════════
   CONNECT
   ═══════════════════════════════════════ */
.connect {
  min-height: 60vh;
  padding-bottom: 10rem;
}

.connect-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.2rem;
  max-width: 360px;
  margin-bottom: 3.5rem;
}

.connect-link {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 400;
  color: var(--text-muted);
  text-decoration: none;
  transition: color 0.3s ease, transform 0.3s ease;
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
}

.connect-prefix {
  color: rgba(232, 168, 73, 0.4);
  transition: color 0.3s ease, transform 0.3s ease;
}

.connect-link:hover {
  color: var(--amber);
  transform: translateX(4px);
}

.connect-link:hover .connect-prefix {
  color: var(--amber);
}

.connect-link:focus-visible {
  outline: 1px solid var(--amber);
  outline-offset: 3px;
}

.connect-cta {
  font-family: var(--font-serif);
  font-size: 1.15rem;
  font-style: italic;
  color: var(--text-muted);
  margin-top: 0.5rem;
}

.cursor {
  color: var(--amber);
  animation: blink 1s step-end infinite;
  margin-left: 2px;
  font-style: normal;
}

@keyframes blink {
  50% { opacity: 0; }
}

/* ═══════════════════════════════════════
   SCROLL REVEAL
   ═══════════════════════════════════════ */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.8s cubic-bezier(0.25, 0.46, 0.45, 0.94),
              transform 0.8s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.reveal.revealed {
  opacity: 1;
  transform: translateY(0);
}

/* Stagger interest nodes */
.interest-node.reveal:nth-child(1) { transition-delay: 0s; }
.interest-node.reveal:nth-child(2) { transition-delay: 0.05s; }
.interest-node.reveal:nth-child(3) { transition-delay: 0.1s; }
.interest-node.reveal:nth-child(4) { transition-delay: 0.15s; }
.interest-node.reveal:nth-child(5) { transition-delay: 0.2s; }
.interest-node.reveal:nth-child(6) { transition-delay: 0.25s; }
.interest-node.reveal:nth-child(7) { transition-delay: 0.3s; }
.interest-node.reveal:nth-child(8) { transition-delay: 0.35s; }
.interest-node.reveal:nth-child(9) { transition-delay: 0.4s; }
.interest-node.reveal:nth-child(10) { transition-delay: 0.45s; }

/* ═══════════════════════════════════════
   RESPONSIVE
   ═══════════════════════════════════════ */
@media (max-width: 768px) {
  .section {
    padding: 5rem 1.5rem;
  }

  .hero-label {
    font-size: 0.6rem;
    letter-spacing: 0.3em;
  }

  .philosophy blockquote::before {
    font-size: 4rem;
    top: -2rem;
    left: -0.5rem;
  }

  .interest-grid {
    gap: 0.6rem;
  }

  .interest-node {
    font-size: 0.72rem;
    padding: 0.6rem 1.1rem;
  }

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

  .connect {
    padding-bottom: 6rem;
  }

  .photo-wrapper {
    max-width: 100%;
  }
}

@media (max-width: 480px) {
  .hero-title {
    font-size: 1.5rem;
  }

  .section {
    padding: 4rem 1.2rem;
  }

  .philosophy blockquote {
    font-size: 1.15rem;
  }
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  .reveal {
    opacity: 1;
    transform: none;
  }

  .hero-label,
  .hero-separator,
  .hero-scroll {
    opacity: 1;
    transform: none;
  }

  .hero-title .char {
    opacity: 1;
    transform: none;
  }

  .essay-word {
    opacity: 1;
    filter: none;
  }
}