:root {
  /* Dark theme (default) - matching the reference */
  --color-bg: #10141a;
  --color-surface: #1c2026;
  --color-surface-low: #181c22;
  --color-surface-high: #262a31;
  --color-surface-highest: #31353c;
  --color-surface-dim: #10141a;
  
  --color-primary: #a2c9ff;
  --color-primary-container: #1879cf;
  --color-on-primary: #00315c;
  --color-on-primary-container: #ffffff;
  --color-on-primary-fixed: #001c38;
  --color-on-primary-fixed-dim: #004882;
  
  --color-secondary: #adc9ee;
  --color-secondary-container: #2c4968;
  --color-on-secondary: #133250;
  --color-on-secondary-container: #9bb7dc;
  --color-secondary-fixed: #d1e4ff;
  --color-secondary-fixed-dim: #adc9ee;
  --color-on-secondary-fixed: #001d36;
  --color-on-secondary-fixed-variant: #2c4968;
  
  --color-tertiary: #ffb784;
  --color-tertiary-container: #b95e01;
  --color-on-tertiary: #4f2500;
  --color-on-tertiary-container: #ffffff;
  --color-tertiary-fixed: #ffdcc6;
  --color-tertiary-fixed-dim: #ffb784;
  --color-on-tertiary-fixed: #301400;
  --color-on-tertiary-fixed-variant: #713700;
  
  --color-error: #ffb4ab;
  --color-error-container: #93000a;
  --color-on-error: #690005;
  --color-on-error-container: #ffdad6;
  
  --color-outline: #8a919d;
  --color-outline-variant: #404751;
  
  --color-on-surface: #dfe2eb;
  --color-on-surface-variant: #c0c7d3;
  --color-on-background: #dfe2eb;
  
  --color-inverse-surface: #dfe2eb;
  --color-inverse-primary: #0060aa;
  --color-inverse-on-surface: #2d3137;
  
  --color-surface-tint: #a2c9ff;
  --color-surface-bright: #353940;
  --color-surface-container: #1c2026;
  --color-surface-container-lowest: #0a0e14;
  --color-surface-container-low: #181c22;
  --color-surface-container-high: #262a31;
  --color-surface-container-highest: #31353c;
  
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-label: 'Space Grotesk', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-material: 'Material Symbols Outlined', sans-serif;
  
  --radius-sm: 0.125rem;
  --radius-md: 0.25rem;
  --radius-lg: 0.5rem;
  --radius-xl: 0.75rem;
  
  --transition: 0.2s ease;
  --transition-slow: 0.4s ease;
}

/* Light theme */
body.light-mode {
  --color-bg: #ffffff;
  --color-surface: #f5f5f5;
  --color-surface-low: #f0f0f0;
  --color-surface-high: #e8e8e8;
  --color-surface-highest: #dedede;
  
  --color-primary: #2563eb;
  --color-primary-container: #d3e4ff;
  --color-on-primary: #ffffff;
  --color-on-primary-container: #001c38;
  --color-on-primary-fixed: #001c38;
  --color-on-primary-fixed-dim: #004882;
  
  --color-secondary: #4a6fa5;
  --color-secondary-container: #d1e4ff;
  --color-on-secondary: #ffffff;
  --color-on-secondary-container: #133250;
  --color-secondary-fixed: #d1e4ff;
  --color-secondary-fixed-dim: #adc9ee;
  --color-on-secondary-fixed: #001d36;
  --color-on-secondary-fixed-variant: #2c4968;
  
  --color-tertiary: #b95e01;
  --color-tertiary-container: #ffdcc6;
  --color-on-tertiary: #ffffff;
  --color-on-tertiary-container: #301400;
  
  --color-error: #ba1a1a;
  --color-error-container: #ffdad6;
  --color-on-error: #ffffff;
  --color-on-error-container: #410002;
  
  --color-outline: #73777f;
  --color-outline-variant: #c3c6cf;
  
  --color-on-surface: #1a1c1e;
  --color-on-surface-variant: #44474e;
  --color-on-background: #1a1c1e;
  
  --color-inverse-surface: #f1f0f4;
  --color-inverse-primary: #a2c9ff;
  --color-inverse-on-surface: #2d3137;
  
  --color-surface-tint: #2563eb;
  --color-surface-bright: #f5f5f5;
  --color-surface-container: #f5f5f5;
  --color-surface-container-lowest: #ffffff;
  --color-surface-container-low: #fafafa;
  --color-surface-container-high: #f0f0f0;
  --color-surface-container-highest: #e8e8e8;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  background-color: var(--color-bg);
  color: var(--color-on-surface);
  line-height: 1.6;
  transition: background-color var(--transition-slow), color var(--transition-slow);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Selection */
::selection {
  background-color: var(--color-primary-container);
  color: var(--color-on-primary-container);
}

/* Material Symbols */
.material-symbols-outlined {
  font-variation-settings: 'FILL' 0, 'wght' 400, 'GRAD' 0, 'opsz' 24;
  font-family: var(--font-material);
}

/* Theme Toggle */
.theme-toggle {
  position: fixed;
  top: 1.5rem;
  right: 1.5rem;
  z-index: 1000;
  width: 44px;
  height: 44px;
  border: 1px solid var(--color-outline-variant);
  border-radius: var(--radius-md);
  background: var(--color-surface-container);
  color: var(--color-on-surface);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition);
}

.theme-toggle .material-symbols-outlined {
  font-size: 1.5rem;
}

.theme-toggle:hover {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: var(--color-on-primary);
}

.theme-toggle:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

/* Navigation */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(16, 20, 26, 0.7);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  transition: background var(--transition-slow);
}

body.light-mode .navbar {
  background: rgba(255, 255, 255, 0.7);
}

.nav-container {
  max-width: 80rem;
  margin: 0 auto;
  padding: 1.5rem 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.05em;
  text-transform: uppercase;
  color: var(--color-on-surface);
  text-decoration: none;
  transition: color var(--transition);
}

.logo:hover {
  color: var(--color-primary);
}

.nav-links {
  display: flex;
  gap: 3rem;
  align-items: center;
}

.nav-links a {
  font-family: var(--font-sans);
  font-weight: 500;
  letter-spacing: -0.02em;
  color: var(--color-on-surface-variant);
  text-decoration: none;
  transition: all var(--transition);
}

.nav-links a:hover {
  color: var(--color-primary);
  transform: scale(1.02);
}

.btn-resume {
  background: var(--color-primary) !important;
  color: var(--color-on-primary) !important;
  padding: 0.5rem 1.25rem !important;
  border-radius: var(--radius-md) !important;
  font-size: 0.875rem !important;
  font-weight: 700 !important;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.btn-resume:hover {
  transform: scale(1.05) !important;
}

.mobile-menu-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--color-primary);
  cursor: pointer;
  padding: 0.5rem;
  font-size: 1.5rem;
}

/* Mobile: show hamburger + move resume button next to it */
@media (max-width: 768px) {
  .mobile-menu-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    position: fixed;
    top: 1rem;
    left: 1rem;
    z-index: 200;
    background: var(--color-surface-container);
    border: 1px solid var(--color-outline-variant);
    border-radius: var(--radius-md);
    width: 44px;
    height: 44px;
  }
  
  .nav-links {
    display: none;
  }
  
  /* When mobile menu is open, show all links including resume */
  .nav-links.mobile-open {
    display: flex;
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: var(--color-bg);
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 2rem;
    z-index: 100;
    padding-top: 80px;
  }
  
  .nav-links.mobile-open a {
    font-size: 1.5rem;
    padding: 1rem;
  }
}

/* Hero Section */
.hero {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 8rem 2rem 4rem;
  position: relative;
  overflow: hidden;
}

.hero-glow {
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 100%;
  height: 100%;
  background: radial-gradient(circle at 50% 0%, rgba(24, 121, 207, 0.08) 0%, rgba(16, 20, 26, 0) 70%);
  pointer-events: none;
}

.hero-content {
  max-width: 80rem;
  margin: 0 auto;
  width: 100%;
  position: relative;
  z-index: 1;
}

.status-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  background: var(--color-surface-container-high);
  padding: 0.375rem 0.75rem;
  border-radius: 9999px;
  margin-bottom: 1.5rem;
}

.status-dot {
  width: 0.5rem;
  height: 0.5rem;
  border-radius: 50%;
  background: var(--color-primary);
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

.status-text {
  font-family: var(--font-label);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-on-secondary-container);
}

.hero h1 {
  font-size: clamp(3rem, 10vw, 6rem);
  font-weight: 800;
  letter-spacing: -0.04em;
  line-height: 1;
  margin-bottom: 1rem;
}

.hero h1 .highlight {
  color: var(--color-primary-container);
}

.hero-label {
  font-family: var(--font-label);
  font-size: clamp(1rem, 2vw, 1.25rem);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-outline);
  margin-bottom: 1rem;
}

.hero-intro {
  max-width: 42rem;
  font-size: clamp(1rem, 2vw, 1.25rem);
  color: var(--color-on-surface-variant);
  font-weight: 300;
  line-height: 1.6;
  margin-bottom: 2rem;
}

.hero-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem;
}

.btn-primary,
.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 1rem 2rem;
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  border-radius: var(--radius-md);
  text-decoration: none;
  transition: all var(--transition);
}

.btn-primary {
  background: var(--color-primary);
  color: var(--color-on-primary);
  border: none;
}

.btn-primary:hover {
  transform: scale(1.02);
  box-shadow: 0 0 32px rgba(162, 201, 255, 0.15);
}

.btn-primary .arrow {
  transition: transform var(--transition);
}

.btn-primary:hover .arrow {
  transform: translateX(4px);
}

.btn-secondary {
  background: transparent;
  color: var(--color-on-surface);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.btn-secondary:hover {
  background: var(--color-surface-container-high);
}

/* Hero Decoration */
.hero-decoration {
  position: absolute;
  right: 0;
  bottom: 5rem;
  opacity: 0.1;
  display: none;
}

@media (min-width: 1024px) {
  .hero-decoration {
    display: block;
  }
  
  .hero-decoration .material-symbols-outlined {
    font-size: 20rem;
    font-variation-settings: 'wght' 100;
  }
}

/* Bio Section */
.bio {
  padding: 8rem 2rem;
  background: var(--color-surface-container-lowest);
}

.bio-container {
  max-width: 80rem;
  margin: 0 auto;
  display: flex;
  justify-content: center;
}

.bio-content {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  max-width: 48rem;
  text-align: center;
}

.bio-content h2 {
  font-size: clamp(1.5rem, 4vw, 2.25rem);
  font-weight: 600;
  letter-spacing: -0.02em;
  line-height: 1.2;
}

.bio-text {
  color: var(--color-on-surface-variant);
  font-size: 1.0625rem;
  line-height: 1.6;
  max-width: 42rem;
}

/* Tech Stack Section */
.tech-stack {
  padding: 8rem 2rem;
}

.tech-container {
  max-width: 80rem;
  margin: 0 auto;
}

.tech-header {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  margin-bottom: 5rem;
}

@media (min-width: 768px) {
  .tech-header {
    flex-direction: row;
    justify-content: space-between;
    align-items: flex-end;
  }
}

.tech-header h2 {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 700;
  letter-spacing: -0.02em;
}

.tech-desc {
  font-family: var(--font-label);
  font-size: 0.875rem;
  color: var(--color-on-surface-variant);
  max-width: 20rem;
  text-align: right;
}

.tech-grid {
  display: grid;
  grid-template-columns: repeat(1, 1fr);
  gap: 2rem;
}

@media (min-width: 768px) {
  .tech-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .tech-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.tech-card {
  background: var(--color-surface-container-low);
  padding: 2.5rem;
  border-radius: var(--radius-lg);
  transition: all var(--transition);
  border-left: 3px solid transparent;
}

.tech-card:hover {
  background: var(--color-surface-container);
  border-left-color: var(--color-primary);
}

.tech-card .icon {
  font-size: 2rem;
  color: var(--color-primary);
  margin-bottom: 1.5rem;
}

.tech-card h3 {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 1rem;
}

.tech-card p {
  color: var(--color-on-surface-variant);
  font-size: 0.875rem;
  line-height: 1.6;
  margin-bottom: 1.5rem;
}

.tech-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.tech-tags span {
  background: var(--color-surface-container-high);
  color: var(--color-on-secondary-container);
  font-family: var(--font-label);
  font-size: 0.625rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  padding: 0.25rem 0.5rem;
  border-radius: 2px;
}

/* Section Label (shared) */
.section-label {
  font-family: var(--font-label);
  font-size: 0.875rem;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--color-primary);
}

/* CTA Section removed - using Contact instead */
.contact {
  padding: 6rem 2rem;
  background: var(--color-surface-container-lowest);
  border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.contact-content {
  max-width: 80rem;
  margin: 0 auto;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2rem;
}

.contact-links {
  display: flex;
  gap: 1.5rem;
  justify-content: center;
  flex-wrap: wrap;
}

.contact-item {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1.25rem;
  color: var(--color-on-surface-variant);
  text-decoration: none;
  background: var(--color-surface-container);
  border: 1px solid var(--color-outline-variant);
  border-radius: var(--radius-md);
  transition: all var(--transition);
}

.contact-item:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.contact-item .material-symbols-outlined {
  font-size: 1.125rem;
}

/* Footer */
footer {
  padding: 5rem 2rem;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  background: var(--color-surface-container-lowest);
}

.footer-content {
  max-width: 80rem;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2rem;
}

.footer-logo {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--color-on-surface);
}

.footer-links {
  display: flex;
  gap: 3rem;
}

.footer-links a {
  font-family: var(--font-label);
  font-size: 0.875rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-on-surface-variant);
  text-decoration: none;
  transition: color var(--transition);
}

.footer-links a:hover {
  color: var(--color-on-surface);
}

.footer-copyright {
  font-family: var(--font-label);
  font-size: 0.625rem;
  letter-spacing: 0.4em;
  color: var(--color-outline);
  text-align: center;
}

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

.hero-content > * {
  animation: fadeInUp 0.6s ease backwards;
}

.status-badge { animation-delay: 0.1s; }
.hero h1 { animation-delay: 0.2s; }
.hero-label { animation-delay: 0.25s; }
.hero-intro { animation-delay: 0.3s; }
.hero-cta { animation-delay: 0.35s; }

/* Responsive */
@media (max-width: 768px) {
  .theme-toggle {
    top: 1rem;
    right: 1rem;
    width: 38px;
    height: 38px;
  }
  
  .theme-toggle .material-symbols-outlined {
    font-size: 1.25rem;
  }
  
  .nav-container {
    padding: 1rem;
  }
  
  .logo {
    padding-left: 3.5rem;
  }
  
  .hero {
    padding: 6rem 1rem 3rem;
  }
  
  .navbar {
    background: var(--color-bg);
  }
  
  .hero-cta {
    flex-direction: column;
  }
  
  .btn-primary,
  .btn-secondary {
    width: 100%;
    justify-content: center;
  }
  
  .bio {
    padding: 4rem 1rem;
  }
  
  .tech-stack {
    padding: 4rem 1rem;
  }
  
  .tech-header {
    margin-bottom: 3rem;
  }
  
  .tech-desc {
    text-align: left;
  }
  
  .cta {
    padding: 4rem 1rem;
  }
  
  footer {
    padding: 3rem 1rem;
  }
  
  .footer-links {
    flex-wrap: wrap;
    justify-content: center;
    gap: 1.5rem;
  }
}

/* Mobile menu */
.nav-links.mobile-open {
  display: flex;
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: var(--color-bg);
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 2rem;
  z-index: 99;
}

.nav-links.mobile-open a {
  font-size: 1.5rem;
}