/* ========================================
   CSS Custom Properties & Reset
   ======================================== */
:root {
  --bg-dark: #0a192f;
  --bg-light: #112240;
  --bg-card: #112240;
  --text-primary: #ccd6f6;
  --text-secondary: #8892b0;
  --accent: #64ffda;
  --accent-tint: rgba(100, 255, 218, 0.1);
  --white: #e6f1ff;
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-display: 'Space Grotesk', sans-serif;
  --nav-height: 70px;
  --transition: all 0.25s cubic-bezier(0.645, 0.045, 0.355, 1);
}

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

html {
  scroll-behavior: smooth;
  scrollbar-width: thin;
  scrollbar-color: var(--accent) var(--bg-dark);
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg-dark);
  color: var(--text-secondary);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

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

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

ul {
  list-style: none;
}

/* ========================================
   3D Background Canvas
   ======================================== */
#bg-canvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  pointer-events: none;
}

/* ========================================
   Navigation
   ======================================== */
#navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-height);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 50px;
  z-index: 100;
  backdrop-filter: blur(10px);
  background: rgba(10, 25, 47, 0.85);
  transition: var(--transition);
}

#navbar.scrolled {
  box-shadow: 0 10px 30px -10px rgba(2, 12, 27, 0.7);
}

.nav-logo {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--accent);
  letter-spacing: -0.5px;
}

.nav-logo:hover {
  color: var(--accent);
  opacity: 0.8;
}

.nav-links {
  display: flex;
  gap: 32px;
  align-items: center;
}

.nav-links a {
  font-family: var(--font-display);
  font-size: 0.85rem;
  color: var(--text-primary);
  position: relative;
  letter-spacing: 0.5px;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--accent);
  transition: width 0.3s ease;
}

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

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

/* ========================================
   Section Styles
   ======================================== */
section {
  position: relative;
  z-index: 1;
  max-width: 1100px;
  margin: 0 auto;
  padding: 100px 24px;
}

.section-title {
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 3vw, 2rem);
  color: var(--text-primary);
  margin-bottom: 48px;
  display: flex;
  align-items: center;
  gap: 12px;
  white-space: nowrap;
}

.section-title::after {
  content: '';
  display: block;
  height: 1px;
  width: 100%;
  max-width: 300px;
  background: #233554;
}

.section-number {
  font-family: var(--font-display);
  font-size: 1rem;
  color: var(--accent);
  font-weight: 400;
}

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

.hero-content {
  max-width: 700px;
}

.hero-greeting {
  font-family: var(--font-display);
  color: var(--accent);
  font-size: clamp(0.9rem, 2vw, 1rem);
  margin-bottom: 20px;
  opacity: 0;
  animation: fadeInUp 0.6s ease forwards;
  animation-delay: 0.2s;
}

.hero-name {
  font-family: var(--font-display);
  font-size: clamp(2.5rem, 7vw, 4.5rem);
  color: var(--text-primary);
  font-weight: 700;
  line-height: 1.1;
  margin-bottom: 8px;
  opacity: 0;
  animation: fadeInUp 0.6s ease forwards;
  animation-delay: 0.35s;
}

.hero-tagline {
  font-family: var(--font-display);
  font-size: clamp(2rem, 5vw, 3.5rem);
  color: var(--text-secondary);
  font-weight: 600;
  line-height: 1.1;
  margin-bottom: 24px;
  opacity: 0;
  animation: fadeInUp 0.6s ease forwards;
  animation-delay: 0.5s;
}

.hero-description {
  max-width: 520px;
  font-size: 1.05rem;
  line-height: 1.7;
  margin-bottom: 48px;
  opacity: 0;
  animation: fadeInUp 0.6s ease forwards;
  animation-delay: 0.65s;
}

.hero-cta {
  display: inline-block;
  padding: 16px 40px;
  border: 1px solid var(--accent);
  color: var(--accent);
  font-family: var(--font-display);
  font-size: 0.9rem;
  border-radius: 6px;
  transition: var(--transition);
  opacity: 0;
  animation: fadeInUp 0.6s ease forwards;
  animation-delay: 0.8s;
}

.hero-cta:hover {
  background: var(--accent-tint);
  transform: translateY(-2px);
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ========================================
   Experience Section
   ======================================== */
.experience-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.exp-card {
  perspective: 1000px;
}

.exp-card-inner {
  background: var(--bg-card);
  border-radius: 12px;
  padding: 32px;
  border: 1px solid #233554;
  transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
  transform-style: preserve-3d;
  height: 100%;
}

.exp-card:hover .exp-card-inner {
  border-color: var(--accent);
  transform: translateY(-8px);
  box-shadow: 0 20px 60px -15px rgba(2, 12, 27, 0.7),
              0 0 40px -20px rgba(100, 255, 218, 0.15);
}

.exp-header {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 20px;
}

.exp-company-logo {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.exp-company-logo svg {
  width: 28px;
  height: 28px;
}

.stripe-logo {
  background: linear-gradient(135deg, #635bff, #7a73ff);
  color: white;
}

.twosigma-logo {
  background: linear-gradient(135deg, #00a4e4, #0085c7);
  color: white;
}

.aws-logo {
  background: linear-gradient(135deg, #ff9900, #ffac31);
  color: white;
}

.capitalone-logo {
  background: linear-gradient(135deg, #d03027, #e8453c);
  color: white;
}

.exp-company {
  font-family: var(--font-display);
  font-size: 1.2rem;
  color: var(--text-primary);
  font-weight: 600;
}

.exp-role {
  font-size: 0.85rem;
  color: var(--accent);
  font-weight: 500;
}

.exp-date {
  font-size: 0.78rem;
  color: var(--text-secondary);
  margin-top: 2px;
}

.exp-description {
  font-size: 0.95rem;
  line-height: 1.7;
  margin-bottom: 20px;
}

.exp-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.exp-tags span {
  font-family: var(--font-display);
  font-size: 0.75rem;
  color: var(--accent);
  background: var(--accent-tint);
  padding: 4px 12px;
  border-radius: 20px;
}

/* ========================================
   Projects Section
   ======================================== */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.project-card {
  perspective: 1000px;
}

.project-card-inner {
  background: var(--bg-card);
  border-radius: 12px;
  padding: 32px 28px;
  border: 1px solid #233554;
  transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
  transform-style: preserve-3d;
  height: 100%;
  display: flex;
  flex-direction: column;
}

.project-card:hover .project-card-inner {
  border-color: var(--accent);
  transform: translateY(-8px);
  box-shadow: 0 20px 60px -15px rgba(2, 12, 27, 0.7),
              0 0 40px -20px rgba(100, 255, 218, 0.15);
}

.project-top {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 28px;
}

.project-icon {
  color: var(--accent);
}

.project-links {
  display: flex;
  gap: 12px;
}

.project-links a {
  color: var(--text-secondary);
  transition: var(--transition);
}

.project-links a:hover {
  color: var(--accent);
  transform: translateY(-2px);
}

.project-title {
  font-family: var(--font-display);
  font-size: 1.2rem;
  color: var(--text-primary);
  font-weight: 600;
  margin-bottom: 12px;
  transition: var(--transition);
}

.project-card:hover .project-title {
  color: var(--accent);
}

.project-description {
  font-size: 0.9rem;
  line-height: 1.7;
  flex-grow: 1;
  margin-bottom: 20px;
}

.project-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: auto;
}

.project-tags span {
  font-family: var(--font-display);
  font-size: 0.72rem;
  color: var(--text-secondary);
  letter-spacing: 0.3px;
}

.project-tags span:not(:last-child)::after {
  content: ' \00b7';
  margin-left: 8px;
  color: #233554;
}

/* ========================================
   About Section
   ======================================== */
.about-content {
  display: grid;
  grid-template-columns: 3fr 2fr;
  gap: 60px;
  align-items: start;
}

.about-text p {
  margin-bottom: 16px;
  font-size: 1rem;
  line-height: 1.8;
}

.highlight {
  color: var(--accent);
}

.skills-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 8px 16px;
  margin-top: 20px;
}

.skills-list li {
  font-family: var(--font-display);
  font-size: 0.88rem;
  color: var(--text-secondary);
  position: relative;
  padding-left: 20px;
}

.skills-list li::before {
  content: '\25B9';
  color: var(--accent);
  position: absolute;
  left: 0;
  font-size: 0.75rem;
}

.about-image {
  position: relative;
  max-width: 280px;
  margin: 0 auto;
}

.about-image-placeholder {
  width: 100%;
  aspect-ratio: 1;
  border-radius: 12px;
  background: var(--bg-light);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  z-index: 2;
  overflow: hidden;
  border: 2px solid #233554;
  transition: var(--transition);
}

.about-image-placeholder span {
  font-family: var(--font-display);
  font-size: 4rem;
  font-weight: 700;
  color: var(--accent);
  opacity: 0.3;
}

.about-image:hover .about-image-placeholder {
  border-color: var(--accent);
}

.about-image-border {
  position: absolute;
  top: 16px;
  left: 16px;
  width: 100%;
  height: 100%;
  border: 2px solid var(--accent);
  border-radius: 12px;
  z-index: 1;
  transition: var(--transition);
}

.about-image:hover .about-image-border {
  top: 12px;
  left: 12px;
}

/* ========================================
   Contact Section
   ======================================== */
#contact {
  text-align: center;
  max-width: 600px;
  padding-top: 120px;
  padding-bottom: 120px;
}

.contact-title {
  font-family: var(--font-display);
  font-size: clamp(2rem, 5vw, 3rem);
  color: var(--text-primary);
  margin: 16px 0 24px;
}

.contact-description {
  font-size: 1.05rem;
  line-height: 1.7;
  margin-bottom: 48px;
}

.contact-btn {
  display: inline-block;
  padding: 18px 56px;
  border: 1px solid var(--accent);
  color: var(--accent);
  font-family: var(--font-display);
  font-size: 0.95rem;
  border-radius: 6px;
  transition: var(--transition);
}

.contact-btn:hover {
  background: var(--accent-tint);
  transform: translateY(-2px);
}

/* ========================================
   Footer
   ======================================== */
footer {
  position: relative;
  z-index: 1;
  text-align: center;
  padding: 24px;
}

.footer-socials {
  display: none;
}

.footer-credit {
  font-family: var(--font-display);
  font-size: 0.8rem;
  color: var(--text-secondary);
  letter-spacing: 0.5px;
}

.footer-credit:hover {
  color: var(--accent);
}

/* ========================================
   Side Elements (fixed left/right gutters)
   ======================================== */
.side-element {
  position: fixed;
  bottom: 0;
  z-index: 50;
  width: 40px;
}

.side-left {
  right: 40px;
}

.side-right {
  left: 40px;
}

.side-email {
  font-family: var(--font-display);
  font-size: 0.78rem;
  letter-spacing: 1.5px;
  color: var(--text-secondary);
  writing-mode: vertical-rl;
  padding-bottom: 120px;
  position: relative;
  transition: var(--transition);
}

.side-email::after {
  content: '';
  display: block;
  width: 1px;
  height: 100px;
  background: var(--text-secondary);
  margin: 0 auto;
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
}

.side-email:hover {
  color: var(--accent);
  transform: translateY(-4px);
}

.side-socials {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 20px;
  padding-bottom: 120px;
  position: relative;
}

.side-socials::after {
  content: '';
  display: block;
  width: 1px;
  height: 100px;
  background: var(--text-secondary);
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
}

.side-socials a {
  color: var(--text-secondary);
  transition: var(--transition);
}

.side-socials a:hover {
  color: var(--accent);
  transform: translateY(-4px);
}

/* ========================================
   Scroll Reveal Animations
   ======================================== */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

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

/* ========================================
   Responsive Design
   ======================================== */
@media (max-width: 1080px) {
  .side-element {
    display: none;
  }

  .footer-socials {
    display: flex;
    justify-content: center;
    gap: 20px;
    margin-bottom: 16px;
  }

  .footer-socials a {
    color: var(--text-secondary);
    transition: var(--transition);
  }

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

@media (max-width: 900px) {
  #navbar {
    padding: 0 24px;
  }

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

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

  .about-content {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .about-image {
    max-width: 240px;
  }
}

@media (max-width: 600px) {
  section {
    padding: 80px 20px;
  }

  .nav-links {
    gap: 20px;
  }

  .nav-links a {
    font-size: 0.78rem;
  }

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

  .skills-list {
    grid-template-columns: 1fr;
  }
}

/* ========================================
   Subtle card 3D tilt glow
   ======================================== */
[data-tilt] {
  will-change: transform;
}