:root {
  /* Premium Dark Theme */
  --bg-primary: #050505;
  --bg-secondary: #0a0a0a;
  --bg-card: rgba(15, 15, 15, 0.6);
  --bg-card-hover: rgba(25, 25, 25, 0.8);
  
  --text-primary: #ededed;
  --text-secondary: #a1a1aa;
  --text-accent: #38bdf8;
  --text-accent-glow: #0284c7;
  
  --border-color: rgba(255, 255, 255, 0.08);
  --border-hover: rgba(56, 189, 248, 0.5);
  
  --glow-primary: rgba(56, 189, 248, 0.15);
  --glow-secondary: rgba(168, 85, 247, 0.15);
  
  /* Typography */
  --font-sans: 'Inter', system-ui, -apple-system, sans-serif;
  --font-mono: 'Fira Code', ui-monospace, SFMono-Regular, monospace;
  
  /* Spacing */
  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 2rem;
  --space-lg: 4rem;
  --space-xl: 8rem;
  
  /* Transitions */
  --transition-fast: 0.15s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
  
  /* Border Radius */
  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;
  
  --bg-nav: rgba(5, 5, 5, 0.7);
  --bg-nav-scrolled: rgba(5, 5, 5, 0.9);
  --text-heading: #ffffff;
  --text-heading-gradient: linear-gradient(to right, #ffffff, #a1a1aa);
  --btn-primary-bg: #ffffff;
  --btn-primary-text: #050505;
  --btn-outline-bg: rgba(255, 255, 255, 0.05);
  
  --card-shadow: 0 4px 20px -2px rgba(0, 0, 0, 0.4);
  --card-shadow-hover: 0 20px 40px -5px rgba(0, 0, 0, 0.6), 0 0 30px rgba(168, 85, 247, 0.15), 0 0 15px rgba(236, 72, 153, 0.1);
}

[data-theme="light"] {
  --bg-primary: #f8fafc;
  --bg-secondary: #f1f5f9;
  --bg-card: rgba(255, 255, 255, 0.7);
  --bg-card-hover: rgba(255, 255, 255, 1);
  --bg-nav: rgba(248, 250, 252, 0.7);
  --bg-nav-scrolled: rgba(248, 250, 252, 0.9);
  
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-heading: #0f172a;
  --text-heading-gradient: linear-gradient(to right, #0f172a, #475569);
  --text-accent: #0284c7;
  --text-accent-glow: #0ea5e9;
  
  --border-color: rgba(0, 0, 0, 0.1);
  --border-hover: rgba(2, 132, 199, 0.4);
  
  --glow-primary: rgba(2, 132, 199, 0.15);
  --glow-secondary: rgba(147, 51, 234, 0.15);

  --btn-primary-bg: #0f172a;
  --btn-primary-text: #ffffff;
  --btn-outline-bg: rgba(0, 0, 0, 0.05);

  --card-shadow: 0 10px 30px -10px rgba(0, 0, 0, 0.1);
  --card-shadow-hover: 0 20px 40px -10px rgba(0, 0, 0, 0.15);
}

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

html {
  scroll-behavior: smooth;
  font-family: var(--font-sans);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.7;
}

body {
  overflow-x: hidden;
  position: relative;
}

/* Background Animated Blobs */
.bg-blobs {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  z-index: -1;
  overflow: hidden;
  pointer-events: none;
  background: var(--bg-primary);
}

.blob {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.5;
  animation: float 20s infinite alternate;
}

.blob-1 {
  top: -10%;
  left: -10%;
  width: 500px;
  height: 500px;
  background: var(--glow-primary);
  animation-delay: 0s;
}

.blob-2 {
  bottom: -10%;
  right: -10%;
  width: 600px;
  height: 600px;
  background: var(--glow-secondary);
  animation-delay: -5s;
}

@keyframes float {
  0% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(50px, 50px) scale(1.1); }
  100% { transform: translate(-50px, 20px) scale(0.9); }
}

/* Custom Cursor */
.cursor-dot {
  width: 8px;
  height: 8px;
  background-color: var(--text-accent);
  position: fixed;
  border-radius: 50%;
  pointer-events: none;
  z-index: 9999;
  transform: translate(-50%, -50%);
  transition: width 0.2s, height 0.2s, background-color 0.2s;
}

.cursor-outline {
  width: 40px;
  height: 40px;
  border: 1px solid var(--border-hover);
  position: fixed;
  border-radius: 50%;
  pointer-events: none;
  z-index: 9998;
  transform: translate(-50%, -50%);
  transition: width 0.2s, height 0.2s, border-color 0.2s;
}

body:hover .cursor-dot { opacity: 1; }
body:hover .cursor-outline { opacity: 1; }

.interactive-hover .cursor-dot {
  width: 0;
  height: 0;
}
.interactive-hover .cursor-outline {
  width: 60px;
  height: 60px;
  background-color: rgba(56, 189, 248, 0.1);
  border-color: var(--text-accent);
  backdrop-filter: blur(2px);
}

/* Typography Utilities */
h1, h2, h3, h4, h5, h6 {
  color: var(--text-heading);
  font-weight: 700;
  line-height: 1.1;
}

h1 {
  font-size: clamp(3rem, 6vw, 5rem);
  letter-spacing: -0.05em;
  margin-bottom: var(--space-sm);
  background: var(--text-heading-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

h2 {
  font-size: clamp(2.5rem, 4vw, 3.5rem);
  letter-spacing: -0.04em;
  margin-bottom: var(--space-md);
}

h3 {
  font-size: 1.75rem;
  margin-bottom: var(--space-xs);
  letter-spacing: -0.02em;
}

p {
  color: var(--text-secondary);
  font-size: 1.125rem;
  margin-bottom: var(--space-sm);
  max-width: 75ch;
}

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

a:hover {
  color: #7dd3fc;
}

/* Layout */
.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 var(--space-md);
  position: relative;
  z-index: 10;
}

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

/* Navbar */
.navbar {
  position: fixed;
  top: 0;
  width: 100%;
  background: var(--bg-nav);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  z-index: 1000;
  border-bottom: 1px solid var(--border-color);
  padding: var(--space-sm) 0;
  transition: padding var(--transition-normal), background var(--transition-normal);
}

.navbar.scrolled {
  padding: 0.5rem 0;
  background: var(--bg-nav-scrolled);
}

.navbar .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.brand {
  font-weight: 800;
  font-size: 1.25rem;
  color: var(--text-heading);
  display: flex;
  align-items: center;
  gap: 0.75rem;
  letter-spacing: -0.02em;
}

.nav-links {
  display: flex;
  gap: var(--space-md);
  align-items: center;
}

.nav-links a {
  color: var(--text-secondary);
  font-size: 0.95rem;
  font-weight: 500;
  position: relative;
}

.nav-links a:hover {
  color: var(--text-heading);
}

.nav-links a::after {
  content: '';
  position: absolute;
  width: 0;
  height: 2px;
  bottom: -4px;
  left: 0;
  background-color: var(--text-accent);
  transition: width var(--transition-normal);
}

.nav-links a:hover::after {
  width: 100%;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.875rem 1.75rem;
  border-radius: 9999px; /* Pill shape */
  font-weight: 600;
  font-size: 1rem;
  cursor: pointer;
  transition: all var(--transition-normal);
  border: 1px solid transparent;
  position: relative;
  overflow: hidden;
}

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

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 25px rgba(255, 255, 255, 0.2);
}

.btn-outline {
  background-color: var(--btn-outline-bg);
  color: var(--text-heading);
  border-color: var(--border-color);
  backdrop-filter: blur(10px);
}

.btn-outline:hover {
  border-color: var(--border-hover);
  background-color: rgba(56, 189, 248, 0.1);
  transform: translateY(-2px);
  text-shadow: 0 0 12px var(--glow-primary);
}

/* Form Elements */
input, textarea {
  background: var(--btn-outline-bg);
  border: 1px solid var(--border-color);
  padding: 0.75rem 1rem;
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-family: var(--font-sans);
  outline: none;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
  width: 100%;
}

input:focus, textarea:focus {
  border-color: var(--text-accent);
  box-shadow: 0 0 0 2px var(--glow-primary);
}

input::placeholder, textarea::placeholder {
  color: var(--text-secondary);
  opacity: 0.5;
}

/* Magnetic Effect wrapper for buttons */
.magnetic-wrap {
  display: inline-block;
}

/* Hero Section */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: var(--space-xl);
}

.hero-content {
  max-width: 900px;
}

.hero-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 260px;
  align-items: start;
  gap: var(--space-lg);
}

.hero-layout .hero-content {
  max-width: none;
  min-width: 0;
}

.hero-portrait {
  position: sticky;
  top: calc(var(--space-xl) + var(--space-sm));
  margin: 0;
  padding: 0.4rem;
  border-radius: 28px;
  background: linear-gradient(145deg, rgba(56, 189, 248, 0.75), rgba(168, 85, 247, 0.55));
  box-shadow: 0 20px 45px rgba(0, 0, 0, 0.4), 0 0 35px rgba(56, 189, 248, 0.16);
}

.hero-portrait img {
  display: block;
  width: 100%;
  aspect-ratio: 1 / 1.15;
  object-fit: cover;
  object-position: center top;
  border-radius: 24px;
  background: #111;
}

.eyebrow {
  font-family: var(--font-mono);
  color: var(--text-accent);
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  margin-bottom: var(--space-sm);
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  background: rgba(56, 189, 248, 0.1);
  padding: 0.5rem 1rem;
  border-radius: 9999px;
  border: 1px solid rgba(56, 189, 248, 0.2);
}

.status-dot {
  width: 8px;
  height: 8px;
  background-color: #10b981;
  border-radius: 50%;
  display: inline-block;
  box-shadow: 0 0 12px #10b981;
  animation: pulse-green 2s infinite;
}

@keyframes pulse-green {
  0% { box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.4); }
  70% { box-shadow: 0 0 0 10px rgba(16, 185, 129, 0); }
  100% { box-shadow: 0 0 0 0 rgba(16, 185, 129, 0); }
}

.hero-actions {
  display: flex;
  gap: var(--space-sm);
  margin-top: var(--space-md);
  flex-wrap: wrap;
}

.hero-proof {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1.5rem;
  margin-top: var(--space-md);
  color: var(--text-secondary);
  font-size: 0.9rem;
  font-family: var(--font-mono);
}

.hero-proof span {
  display: inline-flex;
  align-items: baseline;
  gap: 0.4rem;
}

.hero-proof strong {
  color: var(--text-accent);
  font-size: 1.15rem;
}

.research-highlight {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: var(--space-sm);
  max-width: 830px;
  margin-top: var(--space-lg);
  padding: 0.9rem 1rem;
  border: 1px solid rgba(56, 189, 248, 0.28);
  border-radius: var(--radius-md);
  background: linear-gradient(100deg, rgba(56, 189, 248, 0.12), rgba(168, 85, 247, 0.08));
  position: relative;
}

.research-highlight::before {
  content: '';
  position: absolute;
  top: calc(var(--space-md) * -1);
  left: 0;
  width: 64px;
  height: 1px;
  background: linear-gradient(90deg, var(--text-accent), transparent);
}

.research-highlight-chart {
  grid-column: 1 / -1;
  grid-row: 2;
  width: min(100%, 500px);
  height: auto;
  max-height: 255px;
  justify-self: center;
  object-fit: contain;
  object-position: center;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  background: #fff;
  cursor: zoom-in;
}

.research-highlight-icon {
  width: 42px;
  height: 42px;
  display: grid;
  place-items: center;
  border-radius: 12px;
  background: rgba(56, 189, 248, 0.14);
  color: var(--text-accent);
}

.research-highlight-copy {
  grid-column: 1;
  grid-row: 1;
  display: flex;
  flex-direction: column;
  line-height: 1.35;
}

.research-highlight-copy span {
  color: var(--text-accent);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.research-highlight-copy strong {
  color: var(--text-heading);
  font-size: 0.95rem;
  font-weight: 600;
}

.research-highlight-actions {
  grid-column: 2;
  grid-row: 1;
  display: flex;
  gap: 0.75rem;
  white-space: nowrap;
}

.research-highlight-actions a {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  color: var(--text-heading);
  font-size: 0.85rem;
  font-weight: 600;
  text-decoration: none;
}

.research-highlight-actions a:hover {
  color: var(--text-accent);
}

/* Glass Cards */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: var(--space-md);
  transition: all var(--transition-normal);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  position: relative;
  overflow: hidden;
  box-shadow: var(--card-shadow);
}

/* Interactive Card Glow Effect (handled in JS, styled here) */
.card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  border-radius: inherit;
  padding: 2px; /* Border width */
  background: linear-gradient(
    45deg,
    transparent 40%,
    rgba(56, 189, 248, 0.3),
    rgba(168, 85, 247, 0.3),
    transparent 60%
  );
  -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  opacity: 0;
  transition: opacity var(--transition-normal);
  z-index: -1;
}

.cursor-outline.hover {
  transform: translate(-50%, -50%) scale(1.5);
  background-color: var(--glow-primary);
  border-color: transparent;
}

@keyframes glowPulse {
  0%, 100% {
    opacity: 1;
    transform: scale(1);
    box-shadow: 0 0 10px currentColor;
  }
  50% {
    opacity: 0.5;
    transform: scale(0.8);
    box-shadow: 0 0 0 transparent;
  }
}

.card:hover {
  transform: translateY(-5px);
  background: var(--bg-card-hover);
  box-shadow: var(--card-shadow-hover);
  border-color: transparent;
}

.card:hover::before {
  opacity: 1;
}

/* Grid Layouts */
.grid-2 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
  gap: var(--space-md);
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--space-md);
}

/* Profile Section */
.profile-text {
  font-size: 1.25rem;
  color: #e4e4e7;
  max-width: 100%;
  line-height: 1.8;
}

/* Tech Tags */
.project-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: var(--space-sm);
}

.tag {
  background-color: var(--btn-outline-bg);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  font-size: 0.85rem;
  padding: 0.35rem 0.75rem;
  border-radius: 9999px;
  font-family: var(--font-mono);
  display: flex;
  align-items: center;
  gap: 0.4rem;
  transition: all var(--transition-fast);
}

.tag:hover {
  background-color: rgba(56, 189, 248, 0.15);
  border-color: rgba(56, 189, 248, 0.4);
  color: var(--text-heading);
  transform: translateY(-2px);
}

/* Project Cards */
.project-card {
  display: flex;
  flex-direction: column;
}

.card-image {
  width: 100%;
  height: 180px;
  object-fit: cover;
  border-radius: var(--radius-sm);
  margin-bottom: var(--space-sm);
  border: 1px solid var(--border-color);
  transition: transform var(--transition-slow);
}

.large-card-image {
  width: 100%;
  max-height: 250px;
  object-fit: contain;
  background: rgba(0, 0, 0, 0.2);
  padding: var(--space-sm);
  border-radius: var(--radius-md);
  margin-bottom: var(--space-md);
  border: 1px solid var(--border-color);
  transition: transform var(--transition-slow);
}

.workflow-preview {
  min-height: 150px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 0.6rem;
  padding: var(--space-sm);
  margin-bottom: var(--space-md);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, rgba(56, 189, 248, 0.08), rgba(168, 85, 247, 0.08));
  color: var(--text-accent);
}

.workflow-preview span {
  min-width: 105px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.45rem;
  padding: 0.85rem 0.6rem;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  background: var(--bg-card);
  color: var(--text-heading);
  font-size: 0.78rem;
  font-family: var(--font-mono);
  text-align: center;
}

.what-i-build {
  padding: 0.9rem 1.1rem;
  border-left: 3px solid var(--text-accent);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  background: rgba(56, 189, 248, 0.06);
  color: var(--text-heading);
  font-weight: 500;
}

.real-chart-image {
  width: 100%;
  height: 350px;
  object-fit: cover;
  object-position: top;
  border-radius: var(--radius-md);
  margin-bottom: var(--space-md);
  border: 1px solid var(--border-color);
  transition: transform var(--transition-slow);
}

.card:hover .large-card-image,
.card:hover .real-chart-image {
  transform: scale(1.01);
}

.card:hover .card-image {
  transform: scale(1.02);
}

.card-image,
.large-card-image,
.real-chart-image {
  cursor: zoom-in;
}

/* Lightbox for enlarging card/diagram images */
.lightbox-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.85);
  backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-md);
  z-index: 10000;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-normal);
}

.lightbox-overlay.is-open {
  opacity: 1;
  pointer-events: auto;
}

.lightbox-overlay img {
  max-width: min(95vw, 1400px);
  max-height: 90vh;
  width: auto;
  height: auto;
  object-fit: contain;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-color);
  background: #0a0a0a;
  cursor: zoom-out;
}

.lightbox-close {
  position: fixed;
  top: var(--space-sm);
  right: var(--space-sm);
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid var(--border-color);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  backdrop-filter: blur(10px);
}

.lightbox-close:hover {
  background: rgba(56, 189, 248, 0.2);
  border-color: var(--border-hover);
}

.project-card .eyebrow {
  background: transparent;
  border: none;
  padding: 0;
  margin-bottom: var(--space-xs);
}

.project-case-study {
  margin-top: var(--space-sm);
  border-top: 1px solid var(--border-color);
  padding-top: var(--space-sm);
  flex-grow: 1;
}

.project-case-study h4 {
  font-size: 1.05rem;
  color: var(--text-accent);
  margin-top: var(--space-sm);
  margin-bottom: 0.3rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.project-case-study p {
  font-size: 1rem;
  margin-bottom: 0.75rem;
}

.card-actions {
  margin-top: var(--space-md);
  padding-top: var(--space-sm);
  border-top: 1px solid var(--border-color);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

/* AI Verification Icons */
.card-icon {
  width: 56px;
  height: 56px;
  background: linear-gradient(135deg, rgba(56, 189, 248, 0.1), rgba(168, 85, 247, 0.1));
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-md);
  color: var(--text-accent);
  transition: transform var(--transition-normal);
}

.card:hover .card-icon {
  transform: scale(1.1) rotate(5deg);
  background: linear-gradient(135deg, rgba(56, 189, 248, 0.2), rgba(168, 85, 247, 0.2));
  color: var(--text-heading);
}

/* Footer */
footer {
  padding: var(--space-md) 0;
  text-align: center;
  border-top: 1px solid var(--border-color);
  background-color: var(--bg-secondary);
}

footer .footer-links {
  margin-top: var(--space-sm);
  display: flex;
  justify-content: center;
  gap: var(--space-md);
}

/* Scroll Animations Staggering */
.animate-on-scroll {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.8s cubic-bezier(0.16, 1, 0.3, 1), transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

.animate-on-scroll.is-visible {
  opacity: 1;
  transform: translateY(0);
}

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

/* Responsive */
@media (max-width: 768px) {
  .hero-layout {
    grid-template-columns: 1fr;
    gap: var(--space-md);
  }

  .hero-portrait {
    position: static;
    width: min(220px, 68vw);
    order: -1;
    justify-self: center;
  }

  .hero-actions {
    flex-direction: column;
    align-items: stretch;
  }

  .hero-proof {
    gap: 0.5rem 1rem;
  }

  .research-highlight {
    grid-template-columns: 1fr;
  }

  .research-highlight-chart {
    grid-column: 1;
    grid-row: 3;
    max-height: none;
  }

  .research-highlight-actions {
    grid-column: 1;
    grid-row: 2;
    padding-left: 0;
  }

  .workflow-preview > i {
    transform: rotate(90deg);
  }
  
  .btn {
    width: 100%;
  }

  .nav-links {
    display: none;
  }
  
  .cursor-dot, .cursor-outline {
    display: none;
  }
  
  .grid-2 {
    grid-template-columns: 1fr;
  }
}