/* ============================================
   OMKAR HEGDE — Personal Scientific Profile
   Design System & Core Styles
   ============================================ */

@import url('https://fonts.googleapis.com/css2?family=Cormorant+Garamond:ital,wght@0,300;0,400;0,500;0,600;0,700;1,300;1,400;1,500&family=IBM+Plex+Sans:ital,wght@0,300;0,400;0,500;0,600;1,300;1,400&family=IBM+Plex+Mono:wght@300;400;500&display=swap');

/* --- Custom Properties --- */
:root {
  --void: #0a0a0f;
  --surface: #131318;
  --card: #1c1c24;
  --card-hover: #22222e;
  --border: #2a2a36;
  --border-subtle: #1e1e28;
  --text: #e8e6e1;
  --text-secondary: #9a978f;
  --text-muted: #6b6860;
  --accent: #00d4aa;
  --accent-dim: rgba(0, 212, 170, 0.15);
  --accent-glow: rgba(0, 212, 170, 0.08);
  --blue: #0ea5e9;
  --blue-dim: rgba(14, 165, 233, 0.12);
  --warm: #f5c542;

  --font-heading: 'Cormorant Garamond', Georgia, serif;
  --font-body: 'IBM Plex Sans', -apple-system, sans-serif;
  --font-mono: 'IBM Plex Mono', monospace;

  --space-xs: 4px;
  --space-sm: 8px;
  --space-md: 16px;
  --space-lg: 24px;
  --space-xl: 40px;
  --space-2xl: 64px;
  --space-3xl: 96px;
  --space-4xl: 128px;

  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 16px;

  --transition: 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  --transition-slow: 0.7s cubic-bezier(0.25, 0.46, 0.45, 0.94);

  --max-width: 1200px;
  --max-width-narrow: 800px;
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-body);
  font-weight: 400;
  color: var(--text);
  background-color: var(--void);
  line-height: 1.7;
  overflow-x: hidden;
}

img, video {
  max-width: 100%;
  display: block;
}

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

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

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

/* --- Typography --- */
h1, h2, h3, h4, h5 {
  font-family: var(--font-heading);
  font-weight: 400;
  line-height: 1.15;
  color: var(--text);
}

h1 {
  font-size: clamp(2.8rem, 6vw, 5.5rem);
  letter-spacing: -0.02em;
}

h2 {
  font-size: clamp(2rem, 4vw, 3.2rem);
  letter-spacing: -0.01em;
}

h3 {
  font-size: clamp(1.4rem, 2.5vw, 1.8rem);
}

h4 {
  font-size: 1.15rem;
  font-family: var(--font-body);
  font-weight: 500;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--accent);
}

p {
  max-width: 680px;
  color: var(--text-secondary);
}

.label {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
}

.large-text {
  font-size: clamp(1.15rem, 1.8vw, 1.35rem);
  line-height: 1.8;
}

/* --- Layout --- */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-xl);
}

.container--narrow {
  max-width: var(--max-width-narrow);
}

.section {
  padding: var(--space-4xl) 0;
  position: relative;
}

.section--compact {
  padding: var(--space-3xl) 0;
}

.section-divider {
  width: 60px;
  height: 1px;
  background: var(--accent);
  margin: var(--space-lg) 0;
  opacity: 0.5;
}

.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-xl);
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-xl);
}

.grid-4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-lg);
}

/* --- Navigation --- */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: var(--space-lg) var(--space-xl);
  display: flex;
  align-items: center;
  justify-content: space-between;
  transition: background var(--transition), padding var(--transition);
}

.nav--scrolled {
  background: rgba(10, 10, 15, 0.92);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  padding: var(--space-md) var(--space-xl);
  border-bottom: 1px solid var(--border-subtle);
}

.nav__logo {
  font-family: var(--font-heading);
  font-size: 1.3rem;
  font-weight: 500;
  color: var(--text);
  letter-spacing: 0.02em;
}

.nav__logo span {
  color: var(--accent);
}

.nav__links {
  display: flex;
  gap: var(--space-lg);
  list-style: none;
}

.nav__links a {
  font-size: 0.82rem;
  font-weight: 400;
  color: var(--text-secondary);
  letter-spacing: 0.03em;
  transition: color var(--transition);
  position: relative;
}

.nav__links a:hover,
.nav__links a.active {
  color: var(--text);
}

.nav__links a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--accent);
  transition: width var(--transition);
}

.nav__links a:hover::after,
.nav__links a.active::after {
  width: 100%;
}

.nav__toggle {
  display: none;
  background: none;
  border: none;
  color: var(--text);
  font-size: 1.5rem;
  cursor: pointer;
}

/* Mobile nav */
.nav__mobile {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(10, 10, 15, 0.98);
  backdrop-filter: blur(30px);
  z-index: 999;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-xl);
}

.nav__mobile.open {
  display: flex;
}

.nav__mobile a {
  font-family: var(--font-heading);
  font-size: 1.8rem;
  color: var(--text-secondary);
  transition: color var(--transition);
}

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

.nav__mobile-close {
  position: absolute;
  top: var(--space-lg);
  right: var(--space-xl);
  background: none;
  border: none;
  color: var(--text);
  font-size: 1.8rem;
  cursor: pointer;
}

/* --- Hero --- */
.hero {
  position: relative;
  height: 100vh;
  min-height: 700px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

/* Video layer */
.hero__video-wrap {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.hero__video-wrap video,
.hero__video-wrap .hero__fallback {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.hero__video {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0;
  transition: opacity 2s ease-in-out;
  z-index: 0;
}

.hero__video.active {
  opacity: 1;
  z-index: 1;
}

.hero__fallback {
  background: linear-gradient(135deg, #0a0a0f 0%, #0e1118 50%, #0a0a0f 100%);
}

/* Heavy dark overlay so text is always readable */
.hero__overlay {
  position: absolute;
  inset: 0;
  z-index: 2;
  background: linear-gradient(
    180deg,
    rgba(10, 10, 15, 0.6) 0%,
    rgba(10, 10, 15, 0.72) 40%,
    rgba(10, 10, 15, 0.88) 100%
  );
}

/* Subtle vignette */
.hero::after {
  content: '';
  position: absolute;
  inset: 0;
  z-index: 2;
  background: radial-gradient(ellipse at 50% 50%, transparent 30%, rgba(10,10,15,0.4) 100%);
  pointer-events: none;
}

/* Flow canvas sits above video, below overlay content */
.hero__video-wrap .flow-canvas {
  z-index: 1;
  opacity: 0.35;
}

/* Old dot indicators: hide them, we use the new np-dots instead */
.hero__video-indicators {
  display: none;
}

/* ---- Split layout: portrait left, text right ---- */
.hero__split {
  position: relative;
  z-index: 3;
  display: flex;
  align-items: center;
  gap: clamp(48px, 5vw, 80px);
  max-width: 1280px;
  width: 100%;
  padding: 0 clamp(24px, 4vw, 60px);
  margin: 0 auto;
}

/* PORTRAIT: large, dominant */
.hero__portrait-wrap {
  position: relative;
  flex-shrink: 0;
  width: clamp(300px, 32vw, 460px);
}

.hero__portrait {
  width: 100%;
  height: auto;
  max-height: 580px;
  object-fit: cover;
  object-position: center 20%;
  border-radius: 12px;
  position: relative;
  z-index: 2;
  box-shadow:
    0 0 60px rgba(0, 212, 170, 0.08),
    0 24px 80px rgba(0, 0, 0, 0.6);
  border: 1.5px solid rgba(0, 212, 170, 0.18);
  opacity: 0;
  transform: scale(0.3);
  animation: portraitZoom 1.2s 0.3s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

.hero__portrait-glow {
  position: absolute;
  inset: -30px;
  border-radius: 20px;
  background: radial-gradient(ellipse at center, rgba(0,212,170,0.1) 0%, transparent 65%);
  z-index: 1;
  filter: blur(25px);
  opacity: 0;
  animation: glowFadeIn 2s 0.8s ease-out forwards;
}

@keyframes portraitZoom {
  0% { opacity: 0; transform: scale(0.3); filter: blur(10px); }
  50% { opacity: 1; filter: blur(2px); }
  100% { opacity: 1; transform: scale(1); filter: blur(0); }
}

@keyframes glowFadeIn {
  to { opacity: 1; }
}

/* TEXT side */
.hero__text {
  text-align: left;
  flex: 1;
  min-width: 0;
}

.hero__text .hero__pre {
  opacity: 0;
  transform: translateY(20px);
  animation: fadeUp 0.8s 0.6s forwards;
}

.hero__text .hero__title {
  opacity: 0;
  transform: translateY(30px);
  animation: fadeUp 1s 0.8s forwards;
}

.hero__text .hero__sub {
  opacity: 0;
  transform: translateY(20px);
  animation: fadeUp 0.8s 1.0s forwards;
}

.hero__text .hero__typing {
  opacity: 0;
  animation: fadeUp 0.8s 1.1s forwards;
}

.hero__text .hero__cta {
  opacity: 0;
  transform: translateY(20px);
  animation: fadeUp 0.8s 1.3s forwards;
}

.hero__text .hero__now-playing {
  opacity: 0;
  animation: fadeUp 0.8s 1.5s forwards;
}

/* --- Now Playing --- */
.hero__now-playing {
  margin-top: 32px;
}

.hero__np-label {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-muted);
}

.hero__np-name {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.06em;
  color: var(--accent);
  margin-left: 8px;
  transition: opacity 0.4s ease;
}

.hero__np-dots {
  display: flex;
  gap: 8px;
  margin-top: 12px;
}

.hero__np-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.18);
  cursor: pointer;
  transition: all 0.5s ease;
}

.hero__np-dot.active {
  width: 28px;
  border-radius: 4px;
  background: var(--accent);
  box-shadow: 0 0 10px rgba(0, 212, 170, 0.4);
}

/* --- Typing Effect --- */
.hero__typing {
  font-size: clamp(0.92rem, 1.2vw, 1.05rem);
  color: var(--accent);
  min-height: 1.6em;
  margin-bottom: var(--space-lg);
  font-style: italic;
}

.hero__typing::after {
  content: '|';
  color: var(--accent);
  animation: blink 0.8s step-end infinite;
  margin-left: 2px;
}

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

/* --- Responsive --- */
@media (max-width: 900px) {
  .hero__split {
    flex-direction: column;
    text-align: center;
    gap: var(--space-xl);
    padding-top: 100px;
  }
  .hero__portrait-wrap {
    width: clamp(220px, 50vw, 300px);
  }
  .hero__text {
    text-align: center;
  }
  .hero__text .hero__sub {
    margin-left: auto;
    margin-right: auto;
  }
  .hero__np-dots {
    justify-content: center;
  }
  .hero__now-playing {
    text-align: center;
  }
}

.hero__portrait[src=""] {
  display: none;
}


.hero__pre {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: var(--space-lg);
  opacity: 0;
  transform: translateY(20px);
  animation: fadeUp 0.8s 0.2s forwards;
}

.hero__title {
  font-size: clamp(3rem, 7vw, 6rem);
  font-weight: 300;
  line-height: 1.05;
  margin-bottom: var(--space-lg);
  opacity: 0;
  transform: translateY(30px);
  animation: fadeUp 1s 0.4s forwards;
}

.hero__title em {
  font-style: italic;
  color: var(--accent);
}

.hero__sub {
  font-size: clamp(1rem, 1.5vw, 1.15rem);
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto var(--space-xl);
  line-height: 1.8;
  opacity: 0;
  transform: translateY(20px);
  animation: fadeUp 0.8s 0.6s forwards;
}

.hero__cta {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
  border: 1px solid rgba(0, 212, 170, 0.3);
  padding: var(--space-md) var(--space-xl);
  border-radius: var(--radius-sm);
  transition: all var(--transition);
  opacity: 0;
  transform: translateY(20px);
  animation: fadeUp 0.8s 0.8s forwards;
}

.hero__cta:hover {
  background: var(--accent-dim);
  border-color: var(--accent);
  color: var(--accent);
}

.hero__scroll {
  position: absolute;
  bottom: var(--space-xl);
  left: 50%;
  transform: translateX(-50%);
  z-index: 2;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-sm);
  opacity: 0;
  animation: fadeUp 0.8s 1.2s forwards;
}

.hero__scroll span {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--text-muted);
}

.hero__scroll-line {
  width: 1px;
  height: 40px;
  background: linear-gradient(180deg, var(--accent), transparent);
  animation: scrollPulse 2s infinite;
}

/* --- Cards --- */
.card {
  background: var(--card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: var(--space-xl);
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
}

.card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--accent), transparent);
  opacity: 0;
  transition: opacity var(--transition);
}

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

.card:hover::before {
  opacity: 0.6;
}

.card__icon {
  font-size: 1.5rem;
  margin-bottom: var(--space-md);
  display: block;
}

.card__title {
  font-family: var(--font-heading);
  font-size: 1.3rem;
  margin-bottom: var(--space-sm);
  color: var(--text);
}

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

/* Focus area cards */
.focus-card {
  background: var(--card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: var(--space-lg) var(--space-xl);
  transition: all var(--transition);
  position: relative;
}

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

.focus-card__number {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--accent);
  letter-spacing: 0.1em;
  margin-bottom: var(--space-sm);
}

.focus-card__title {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  margin-bottom: var(--space-sm);
  color: var(--text);
}

.focus-card__text {
  font-size: 0.85rem;
  color: var(--text-muted);
  line-height: 1.65;
}

/* Question cards */
.question-strip {
  background: var(--surface);
  border-top: 1px solid var(--border-subtle);
  border-bottom: 1px solid var(--border-subtle);
}

.question-card {
  padding: var(--space-xl) 0;
  border-bottom: 1px solid var(--border-subtle);
  cursor: default;
  transition: padding-left var(--transition);
}

.question-card:last-child {
  border-bottom: none;
}

.question-card:hover {
  padding-left: var(--space-md);
}

.question-card__text {
  font-family: var(--font-heading);
  font-size: clamp(1.3rem, 2.5vw, 1.8rem);
  font-style: italic;
  color: var(--text-secondary);
  transition: color var(--transition);
}

.question-card:hover .question-card__text {
  color: var(--accent);
}

.question-card__text::before {
  content: '— ';
  color: var(--accent);
  opacity: 0.5;
}

/* Update cards */
.update-card {
  background: var(--card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: all var(--transition);
}

.update-card:hover {
  border-color: var(--border);
  transform: translateY(-3px);
}

.update-card__image {
  width: 100%;
  height: 200px;
  background: var(--surface);
  background-size: cover;
  background-position: center;
  position: relative;
}

.update-card__tag {
  position: absolute;
  top: var(--space-md);
  left: var(--space-md);
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
  background: rgba(10, 10, 15, 0.8);
  padding: var(--space-xs) var(--space-sm);
  border-radius: var(--radius-sm);
}

.update-card__body {
  padding: var(--space-lg);
}

.update-card__title {
  font-family: var(--font-heading);
  font-size: 1.15rem;
  margin-bottom: var(--space-sm);
  color: var(--text);
}

.update-card__date {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--text-muted);
  margin-bottom: var(--space-sm);
}

.update-card__text {
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.65;
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: var(--space-md) var(--space-xl);
  border-radius: var(--radius-sm);
  border: 1px solid;
  cursor: pointer;
  transition: all var(--transition);
  text-decoration: none;
}

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

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

.btn--outline {
  background: transparent;
  border-color: var(--border);
  color: var(--text-secondary);
}

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

.btn--sm {
  font-size: 0.68rem;
  padding: var(--space-sm) var(--space-md);
}

/* --- Tags --- */
.tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--accent);
  background: var(--accent-dim);
  padding: var(--space-xs) var(--space-sm);
  border-radius: var(--radius-sm);
}

.tag--blue {
  color: var(--blue);
  background: var(--blue-dim);
}

/* --- Timeline --- */
.timeline {
  position: relative;
  padding-left: var(--space-2xl);
}

.timeline::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 1px;
  background: linear-gradient(180deg, var(--accent), var(--border-subtle), transparent);
}

.timeline__item {
  position: relative;
  padding-bottom: var(--space-3xl);
}

.timeline__item:last-child {
  padding-bottom: 0;
}

.timeline__dot {
  position: absolute;
  left: calc(-1 * var(--space-2xl) - 5px);
  top: 6px;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 12px var(--accent-dim);
}

.timeline__period {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: var(--space-sm);
}

.timeline__title {
  font-family: var(--font-heading);
  font-size: 1.6rem;
  margin-bottom: var(--space-sm);
  color: var(--text);
}

.timeline__subtitle {
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin-bottom: var(--space-md);
  font-style: italic;
}

.timeline__text {
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.75;
  max-width: 600px;
}

/* --- Page Header --- */
.page-header {
  padding: var(--space-4xl) 0 var(--space-3xl);
  position: relative;
}

.page-header__pre {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: var(--space-md);
}

.page-header__title {
  font-size: clamp(2.4rem, 5vw, 4rem);
  font-weight: 300;
  margin-bottom: var(--space-lg);
}

.page-header__desc {
  font-size: clamp(1rem, 1.4vw, 1.15rem);
  color: var(--text-secondary);
  max-width: 600px;
  line-height: 1.8;
}

/* --- Publication Cards --- */
.pub-card {
  background: var(--card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: var(--space-xl);
  transition: all var(--transition);
  display: grid;
  grid-template-columns: 1fr auto;
  gap: var(--space-xl);
  align-items: start;
}

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

.pub-card__meta {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--text-muted);
  letter-spacing: 0.06em;
  margin-bottom: var(--space-sm);
}

.pub-card__title {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  color: var(--text);
  margin-bottom: var(--space-sm);
  line-height: 1.35;
}

.pub-card__summary {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: var(--space-md);
}

.pub-card__tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
  margin-bottom: var(--space-md);
}

.pub-card__links {
  display: flex;
  gap: var(--space-sm);
}

.pub-card__thumb {
  width: 140px;
  height: 100px;
  background: var(--surface);
  border-radius: var(--radius-sm);
  flex-shrink: 0;
  background-size: cover;
  background-position: center;
}

/* --- Phenomena Gallery --- */
.phenomena-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: var(--space-lg);
}

.phenomenon-card {
  background: var(--card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  overflow: hidden;
  cursor: pointer;
  transition: all var(--transition);
}

.phenomenon-card:hover {
  border-color: var(--accent);
  transform: translateY(-3px);
}

.phenomenon-card__media {
  width: 100%;
  height: 220px;
  background: var(--surface);
  background-size: cover;
  background-position: center;
  position: relative;
}

.phenomenon-card__play {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(10, 10, 15, 0.4);
  opacity: 0;
  transition: opacity var(--transition);
}

.phenomenon-card:hover .phenomenon-card__play {
  opacity: 1;
}

.phenomenon-card__play svg {
  width: 48px;
  height: 48px;
  fill: var(--accent);
}

.phenomenon-card__body {
  padding: var(--space-lg);
}

.phenomenon-card__title {
  font-family: var(--font-heading);
  font-size: 1.2rem;
  color: var(--text);
  margin-bottom: var(--space-xs);
}

.phenomenon-card__hook {
  font-size: 0.85rem;
  color: var(--accent);
  font-style: italic;
  margin-bottom: var(--space-sm);
}

.phenomenon-card__desc {
  font-size: 0.85rem;
  color: var(--text-muted);
  line-height: 1.65;
}

/* --- Blog --- */
.blog-card {
  background: var(--card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: var(--space-xl);
  transition: all var(--transition);
}

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

.blog-card__cat {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: var(--space-sm);
}

.blog-card__title {
  font-family: var(--font-heading);
  font-size: 1.3rem;
  color: var(--text);
  margin-bottom: var(--space-sm);
  line-height: 1.3;
}

.blog-card__excerpt {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: var(--space-md);
}

.blog-card__date {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--text-muted);
}

/* Blog post template */
.post {
  max-width: var(--max-width-narrow);
  margin: 0 auto;
}

.post__title {
  font-size: clamp(2rem, 4vw, 3rem);
  margin-bottom: var(--space-md);
  line-height: 1.15;
}

.post__meta {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-bottom: var(--space-3xl);
  display: flex;
  gap: var(--space-lg);
}

.post__body p {
  margin-bottom: var(--space-lg);
  font-size: 1.05rem;
  line-height: 1.85;
  color: var(--text-secondary);
}

.post__body h2 {
  margin-top: var(--space-2xl);
  margin-bottom: var(--space-md);
  font-size: 1.8rem;
}

.post__body blockquote {
  border-left: 2px solid var(--accent);
  padding-left: var(--space-lg);
  margin: var(--space-xl) 0;
  font-style: italic;
  color: var(--text-secondary);
}

/* --- Media Gallery --- */
.media-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: var(--space-md);
}

.media-item {
  aspect-ratio: 4/3;
  background: var(--card);
  border-radius: var(--radius-md);
  overflow: hidden;
  cursor: pointer;
  position: relative;
  transition: transform var(--transition);
  background-size: cover;
  background-position: center;
}

.media-item:hover {
  transform: scale(1.02);
}

.media-item__overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 50%, rgba(10, 10, 15, 0.8) 100%);
  opacity: 0;
  transition: opacity var(--transition);
  display: flex;
  align-items: flex-end;
  padding: var(--space-lg);
}

.media-item:hover .media-item__overlay {
  opacity: 1;
}

.media-item__caption {
  font-size: 0.85rem;
  color: var(--text);
}

/* --- Lightbox --- */
.lightbox {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 2000;
  background: rgba(10, 10, 15, 0.95);
  backdrop-filter: blur(20px);
  align-items: center;
  justify-content: center;
  padding: var(--space-xl);
}

.lightbox.open {
  display: flex;
}

.lightbox__close {
  position: absolute;
  top: var(--space-lg);
  right: var(--space-xl);
  background: none;
  border: none;
  color: var(--text);
  font-size: 2rem;
  cursor: pointer;
}

.lightbox__content {
  max-width: 900px;
  max-height: 80vh;
  width: 100%;
}

.lightbox__content img,
.lightbox__content video {
  width: 100%;
  max-height: 70vh;
  object-fit: contain;
  border-radius: var(--radius-md);
}

.lightbox__caption {
  margin-top: var(--space-md);
  text-align: center;
  color: var(--text-secondary);
  font-size: 0.9rem;
}

/* --- Yoga page --- */
.yoga-section {
  background: linear-gradient(180deg, var(--void) 0%, #0d0d12 100%);
}

.yoga-card {
  background: rgba(28, 28, 36, 0.5);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: var(--space-xl);
  backdrop-filter: blur(10px);
}

.yoga-card__title {
  font-family: var(--font-heading);
  font-size: 1.4rem;
  color: var(--text);
  margin-bottom: var(--space-sm);
  font-style: italic;
}

.yoga-card__text {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.8;
}

/* --- Contact --- */
.contact-links {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-md);
}

.contact-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-secondary);
  padding: var(--space-md) var(--space-lg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  transition: all var(--transition);
}

.contact-link:hover {
  border-color: var(--accent);
  color: var(--accent);
}

/* --- Filter Buttons --- */
.filters {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
  margin-bottom: var(--space-xl);
}

.filter-btn {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-muted);
  background: var(--card);
  border: 1px solid var(--border-subtle);
  padding: var(--space-sm) var(--space-md);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition);
}

.filter-btn:hover,
.filter-btn.active {
  color: var(--accent);
  border-color: var(--accent);
  background: var(--accent-dim);
}

/* --- Future Lab --- */
.future-lab {
  background: var(--surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: var(--space-3xl);
  text-align: center;
  position: relative;
  overflow: hidden;
}

.future-lab::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at center, var(--accent-glow) 0%, transparent 70%);
  pointer-events: none;
}

/* --- Footer --- */
.footer {
  padding: var(--space-3xl) 0 var(--space-xl);
  border-top: 1px solid var(--border-subtle);
}

.footer__grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--space-xl);
  margin-bottom: var(--space-3xl);
}

.footer__brand {
  font-family: var(--font-heading);
  font-size: 1.2rem;
  color: var(--text);
  margin-bottom: var(--space-md);
}

.footer__desc {
  font-size: 0.85rem;
  color: var(--text-muted);
  line-height: 1.7;
  max-width: 300px;
}

.footer__heading {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: var(--space-md);
}

.footer__links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.footer__links a {
  font-size: 0.85rem;
  color: var(--text-muted);
  transition: color var(--transition);
}

.footer__links a:hover {
  color: var(--text);
}

.footer__bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: var(--space-xl);
  border-top: 1px solid var(--border-subtle);
  font-size: 0.78rem;
  color: var(--text-muted);
}

/* --- Animations --- */
@keyframes fadeUp {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes scrollPulse {
  0%, 100% { opacity: 0.3; transform: scaleY(0.6); }
  50% { opacity: 1; transform: scaleY(1); }
}

.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.7s ease-out, transform 0.7s ease-out;
}

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

.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }
.reveal-delay-3 { transition-delay: 0.3s; }
.reveal-delay-4 { transition-delay: 0.4s; }

/* --- Reduced Motion --- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
  .hero__pre, .hero__title, .hero__sub, .hero__cta, .hero__scroll {
    opacity: 1; transform: none; animation: none;
  }
  .hero__scroll-line { animation: none; opacity: 0.5; }
}

/* --- Responsive --- */
@media (max-width: 1024px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .footer__grid { grid-template-columns: 1fr 1fr; gap: var(--space-xl); }
}

@media (max-width: 768px) {
  .nav__links { display: none; }
  .nav__toggle { display: block; }

  .section { padding: var(--space-3xl) 0; }
  .container { padding: 0 var(--space-lg); }

  .grid-2, .grid-3, .grid-4 {
    grid-template-columns: 1fr;
  }

  .pub-card {
    grid-template-columns: 1fr;
  }

  .pub-card__thumb {
    width: 100%;
    height: 160px;
    order: -1;
  }

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

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

  .footer__bottom {
    flex-direction: column;
    gap: var(--space-md);
    text-align: center;
  }

  .contact-links {
    flex-direction: column;
  }

  .hero__title {
    font-size: clamp(2.2rem, 8vw, 3.5rem);
  }
}

@media (max-width: 480px) {
  .hero {
    min-height: 100svh;
  }
}

/* --- Utility --- */
.mt-sm { margin-top: var(--space-sm); }
.mt-md { margin-top: var(--space-md); }
.mt-lg { margin-top: var(--space-lg); }
.mt-xl { margin-top: var(--space-xl); }
.mt-2xl { margin-top: var(--space-2xl); }
.mt-3xl { margin-top: var(--space-3xl); }
.mb-md { margin-bottom: var(--space-md); }
.mb-lg { margin-bottom: var(--space-lg); }
.mb-xl { margin-bottom: var(--space-xl); }
.text-center { text-align: center; }
.text-accent { color: var(--accent); }
.flex-center { display: flex; align-items: center; justify-content: center; }

/* ============================================
   DYNAMIC FEATURES v2
   ============================================ */

/* --- Flow-field canvas --- */
.flow-canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 0;
}

/* --- Section with video background --- */
.section--video {
  position: relative;
  overflow: hidden;
}

.section-video {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  z-index: 0;
  opacity: 0.2;
  transition: opacity 1s ease;
}

.section-video.playing {
  opacity: 0.25;
}

.section--video > .container,
.section--video > .section__overlay {
  position: relative;
  z-index: 2;
}

.section--video .section__overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    180deg,
    rgba(10, 10, 15, 0.7) 0%,
    rgba(10, 10, 15, 0.85) 50%,
    rgba(10, 10, 15, 0.95) 100%
  );
  z-index: 1;
}

/* --- Hover-to-play video in cards --- */
.video-hover {
  cursor: pointer;
}

.video-hover__player {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0;
  transition: opacity 0.5s ease;
  z-index: 1;
  pointer-events: none;
}

.phenomenon-card__media,
.update-card__image {
  position: relative;
  overflow: hidden;
}

/* --- Parallax containers --- */
[data-parallax] {
  will-change: transform;
}

/* --- Animated timeline line --- */
.timeline {
  position: relative;
}

.timeline__line {
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 1px;
  background: var(--border-subtle);
}

.timeline__line-fill {
  position: absolute;
  left: 0;
  top: 0;
  width: 1px;
  height: 0%;
  background: linear-gradient(180deg, var(--accent), var(--blue));
  transition: height 0.1s linear;
}

.timeline__dot {
  transition: transform 0.4s ease, box-shadow 0.4s ease;
}

.timeline__dot--active {
  transform: scale(1.4);
  box-shadow: 0 0 16px rgba(0, 212, 170, 0.5), 0 0 32px rgba(0, 212, 170, 0.2);
}

/* --- Hero flow canvas specifics --- */
.hero .flow-canvas {
  z-index: 1;
  opacity: 0.7;
}

/* --- Parallax depth on hero text --- */
.hero__content {
  will-change: transform;
}

/* --- Scroll cue animation enhancement --- */
@keyframes scrollFloat {
  0%, 100% { transform: translateY(0); opacity: 0.5; }
  50% { transform: translateY(8px); opacity: 1; }
}

.hero__scroll {
  animation: scrollFloat 2.5s ease-in-out infinite;
}

/* --- Video card play indicator --- */
.video-hover .phenomenon-card__play svg,
.video-hover .update-card__image::after {
  transition: opacity var(--transition), transform var(--transition);
}

.video-hover:hover .phenomenon-card__play {
  opacity: 0;
}

/* =============================================
   DYNAMIC FEATURES v2
   ============================================= */

/* --- Section Video Backgrounds --- */
.section-video {
  position: relative;
  overflow: hidden;
}

.section-video__bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.section-video__bg video {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.section-video__overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    180deg,
    rgba(10, 10, 15, 0.75) 0%,
    rgba(10, 10, 15, 0.85) 50%,
    rgba(10, 10, 15, 0.9) 100%
  );
  z-index: 1;
}

.section-video > .container {
  position: relative;
  z-index: 2;
}

/* --- Flow Canvas (ambient on sections) --- */
.flow-canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 1;
  opacity: 0.7;
}

.section-video .flow-canvas {
  z-index: 2;
}

/* --- Parallax helpers --- */
.hero__video-wrap {
  will-change: transform;
}

.hero__content {
  will-change: transform, opacity;
}

/* --- Hover-to-play video card states --- */
[data-video-src] {
  cursor: pointer;
}

[data-video-src] .phenomenon-card__play {
  transition: opacity 0.4s ease;
}

[data-video-src]:hover .phenomenon-card__play {
  opacity: 0;
}

/* Video play indicator badge */
.video-badge {
  position: absolute;
  top: var(--space-sm);
  right: var(--space-sm);
  font-family: var(--font-mono);
  font-size: 0.6rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
  background: rgba(10, 10, 15, 0.7);
  padding: 3px 8px;
  border-radius: var(--radius-sm);
  z-index: 3;
  pointer-events: none;
}

/* --- Timeline animation --- */
.timeline__dot {
  transition: transform 0.5s ease, box-shadow 0.5s ease;
  transform: scale(0.6);
  opacity: 0.4;
}

.timeline__dot--active {
  transform: scale(1);
  opacity: 1;
  box-shadow: 0 0 16px rgba(0, 212, 170, 0.4), 0 0 4px rgba(0, 212, 170, 0.6);
  animation: dotPulse 2s ease-in-out infinite;
}

@keyframes dotPulse {
  0%, 100% { box-shadow: 0 0 12px rgba(0, 212, 170, 0.3); }
  50% { box-shadow: 0 0 20px rgba(0, 212, 170, 0.6); }
}

/* --- Streamline canvas on research sections --- */
.research-section-bg {
  position: relative;
  overflow: hidden;
}

.research-section-bg .flow-canvas {
  opacity: 0.4;
}

/* --- Reduced motion override --- */
@media (prefers-reduced-motion: reduce) {
  .timeline__dot {
    transform: scale(1);
    opacity: 1;
    animation: none;
  }
  .timeline__dot--active {
    animation: none;
  }
  [data-video-src] video {
    display: none;
  }
  .flow-canvas {
    display: none;
  }
}