/* =====================================
   DESIGN SYSTEM
===================================== */
:root {
  --bg: #080c10;
  --bg2: #0d1117;
  --surface: #111820;
  --surface2: #161e28;
  --border: rgba(255,255,255,0.07);
  --border-accent: rgba(96,165,250,0.25);
  --text: #e8edf2;
  --text-muted: #6b7a8d;
  --text-dim: #3d4a5a;
  --accent: #60a5fa;
  --accent2: #38bdf8;
  --accent-green: #34d399;
  --accent-amber: #fbbf24;
  --accent-rose: #f87171;
  --font-display: 'Syne', sans-serif;
  --font-mono: 'DM Mono', monospace;
  --font-body: 'DM Sans', sans-serif;
}

/* =====================================
   RESET & BASE
===================================== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-body);
  background-color: var(--bg);
  color: var(--text);
  line-height: 1.6;
  font-weight: 300;
  overflow-x: hidden;
}

a { text-decoration: none; color: inherit; }

/* =====================================
   TEXTURE & AMBIENCE
===================================== */
.grain {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 9999;
  opacity: 0.025;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 512 512' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)'/%3E%3C/svg%3E");
}

.ambient-glow {
  position: fixed;
  top: -30vh;
  left: 50%;
  transform: translateX(-50%);
  width: 80vw;
  height: 60vh;
  background: radial-gradient(ellipse, rgba(96,165,250,0.08) 0%, transparent 70%);
  pointer-events: none;
  z-index: 0;
}

/* =====================================
   NAV
===================================== */
header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: 1.25rem 3rem;
  background: rgba(8, 12, 16, 0.8);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
}

nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  max-width: 1100px;
  margin: 0 auto;
}

.nav-logo {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.2rem;
  color: var(--accent);
  letter-spacing: 0.05em;
  cursor: default;
}

a.nav-logo { cursor: pointer; }

.nav-links { display: flex; gap: 2.5rem; }

.nav-links a {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--text-muted);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  transition: color 0.2s;
}

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

.nav-links a.active {
  position: relative;
}
.nav-links a.active::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  right: 0;
  height: 1px;
  background: var(--accent);
}

/* =====================================
   HERO SECTION
===================================== */
#hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: 8rem 3rem 5rem;
  position: relative;
}

.hero-inner {
  max-width: 1100px;
  margin: 0 auto;
  width: 100%;
  display: grid;
  grid-template-columns: 1fr 380px;
  gap: 5rem;
  align-items: center;
}

.eyebrow {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--accent);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 1.5rem;
  opacity: 0;
  animation: fadeUp 0.7s 0.1s forwards;
}

.dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent-green);
  box-shadow: 0 0 8px var(--accent-green);
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(0.8); }
}

h1 {
  font-family: var(--font-display);
  font-size: clamp(3.5rem, 7vw, 6rem);
  font-weight: 800;
  line-height: 1;
  letter-spacing: -0.02em;
  margin-bottom: 1.5rem;
  opacity: 0;
  animation: fadeUp 0.7s 0.2s forwards;
}

.outline-text {
  -webkit-text-stroke: 2px var(--accent);
  color: transparent;
}

.hero-sub {
  font-size: 1.05rem;
  color: var(--text-muted);
  max-width: 500px;
  line-height: 1.7;
  margin-bottom: 2.5rem;
  opacity: 0;
  animation: fadeUp 0.7s 0.3s forwards;
}

.hero-cta {
  display: flex;
  gap: 1rem;
  margin-bottom: 2rem;
  opacity: 0;
  animation: fadeUp 0.7s 0.4s forwards;
}

.btn-primary {
  display: inline-block;
  padding: 0.75rem 1.75rem;
  background: var(--accent);
  color: var(--bg);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.9rem;
  border-radius: 6px;
  transition: all 0.2s;
  border: none;
  cursor: pointer;
  letter-spacing: 0.02em;
}
.btn-primary:hover {
  background: var(--accent2);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(96,165,250,0.3);
}
.btn-primary.full-width { width: 100%; text-align: center; }

.btn-ghost {
  display: inline-block;
  padding: 0.75rem 1.75rem;
  background: transparent;
  color: var(--text-muted);
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.9rem;
  border-radius: 6px;
  border: 1px solid var(--border);
  transition: all 0.2s;
}
.btn-ghost:hover {
  border-color: var(--accent);
  color: var(--accent);
  transform: translateY(-2px);
}

.hero-links {
  display: flex;
  gap: 1.5rem;
  opacity: 0;
  animation: fadeUp 0.7s 0.5s forwards;
}
.hero-links a {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--text-dim);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  transition: color 0.2s;
  position: relative;
}
.hero-links a::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  right: 0;
  height: 1px;
  background: var(--accent);
  transform: scaleX(0);
  transition: transform 0.2s;
}
.hero-links a:hover { color: var(--accent); }
.hero-links a:hover::after { transform: scaleX(1); }

/* Profile */
.hero-right {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.5rem;
  opacity: 0;
  animation: fadeIn 0.9s 0.4s forwards;
}

.profile-wrapper {
  position: relative;
  width: 220px;
  height: 220px;
}

.profile-pic {
  width: 220px;
  height: 220px;
  object-fit: cover;
  object-position: 45% 20%;
  border-radius: 50%;
  border: 2px solid var(--border-accent);
  position: relative;
  z-index: 1;
  filter: grayscale(15%);
}

.profile-ring {
  position: absolute;
  inset: -8px;
  border-radius: 50%;
  border: 1px dashed rgba(96,165,250,0.3);
  animation: spin 20s linear infinite;
}
.profile-ring::before {
  content: '';
  position: absolute;
  top: -3px;
  left: 50%;
  width: 6px;
  height: 6px;
  background: var(--accent);
  border-radius: 50%;
  transform: translateX(-50%);
}

@keyframes spin { from { transform: rotate(0deg); } to { transform: rotate(360deg); } }

.stat-cards {
  display: flex;
  gap: 1rem;
  width: 100%;
}

.stat {
  flex: 1;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 1rem;
  text-align: center;
  transition: border-color 0.2s;
}
.stat:hover { border-color: var(--border-accent); }

.stat-num {
  display: block;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.5rem;
  color: var(--accent);
}
.stat-label {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

/* =====================================
   SECTIONS (SHARED)
===================================== */
section { position: relative; z-index: 1; }

.section-inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 6rem 3rem;
}

.section-header {
  display: flex;
  align-items: baseline;
  gap: 1.5rem;
  margin-bottom: 3.5rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--border);
}

.section-tag {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--accent);
  letter-spacing: 0.1em;
}

.section-header h2 {
  font-family: var(--font-display);
  font-size: 2.2rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--text);
}

/* =====================================
   TIMELINE
===================================== */
.timeline {
  display: flex;
  flex-direction: column;
  gap: 0;
  position: relative;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 140px;
  top: 0;
  bottom: 0;
  width: 1px;
  background: var(--border);
}

.timeline-item {
  display: grid;
  grid-template-columns: 140px 1fr;
  gap: 0 2.5rem;
  padding: 2rem 0;
  border-bottom: 1px solid var(--border);
  transition: background 0.2s;
}
.timeline-item:last-child { border-bottom: none; }

.timeline-meta {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  padding-top: 0.2rem;
  align-items: flex-end;
  padding-right: 2rem;
}

.tl-date {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--text-dim);
  text-align: right;
  line-height: 1.4;
}

.tl-type {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  padding: 0.2rem 0.5rem;
  border-radius: 3px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-weight: 400;
}
.tl-type.research { background: rgba(96,165,250,0.12); color: var(--accent); border: 1px solid rgba(96,165,250,0.2); }
.tl-type.engineering { background: rgba(52,211,153,0.1); color: var(--accent-green); border: 1px solid rgba(52,211,153,0.2); }
.tl-type.founder { background: rgba(251,191,36,0.1); color: var(--accent-amber); border: 1px solid rgba(251,191,36,0.2); }

.timeline-content {
  padding-left: 2.5rem;
  position: relative;
}
.timeline-content::before {
  content: '';
  position: absolute;
  left: -0.5rem;
  top: 0.55rem;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--surface2);
  border: 1px solid var(--border-accent);
}

.timeline-content h3 {
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 0.2rem;
}
.tl-org {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--accent);
  margin-bottom: 0.75rem;
}
.tl-desc {
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.65;
  margin-bottom: 1rem;
}
.tl-desc strong { color: var(--accent-green); font-weight: 500; }

.tl-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}
.tl-tags span {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--text-dim);
  background: var(--surface);
  border: 1px solid var(--border);
  padding: 0.2rem 0.6rem;
  border-radius: 3px;
  letter-spacing: 0.04em;
}

/* =====================================
   SKILLS
===================================== */
#skills { background: var(--bg2); }
#skills .section-inner { border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }

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

.skill-group {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.5rem;
  transition: border-color 0.2s;
}
.skill-group:hover { border-color: var(--border-accent); }

.skill-group h4 {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 1rem;
}

.skill-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.skill-pills span {
  font-family: var(--font-body);
  font-size: 0.82rem;
  color: var(--text-muted);
  background: var(--surface2);
  border: 1px solid var(--border);
  padding: 0.3rem 0.75rem;
  border-radius: 100px;
  transition: all 0.15s;
}
.skill-pills span:hover {
  color: var(--accent);
  border-color: var(--border-accent);
  background: rgba(96,165,250,0.06);
}

/* =====================================
   AWARDS
===================================== */
.awards-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1rem;
}

.award-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.75rem 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  transition: all 0.2s;
}
.award-card:hover {
  border-color: var(--border-accent);
  transform: translateY(-2px);
}

.award-icon { font-size: 1.75rem; margin-bottom: 0.25rem; }

.award-card p {
  font-size: 0.88rem;
  color: var(--text-muted);
  line-height: 1.4;
}

.award-place {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

/* =====================================
   PROJECTS PAGE
===================================== */
#projects-page { padding-top: 80px; }

.page-hero {
  padding: 5rem 0 4rem;
}
.page-hero h1 {
  font-family: var(--font-display);
  font-size: clamp(3rem, 6vw, 5rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  margin: 0.5rem 0 1rem;
  opacity: 1;
  animation: none;
}
.page-sub {
  font-size: 1rem;
  color: var(--text-muted);
  max-width: 520px;
}

.projects-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
}

.project-card.featured {
  grid-column: span 2;
  display: grid;
  grid-template-columns: 1fr 1fr;
}

.project-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 14px;
  overflow: hidden;
  transition: all 0.25s;
}
.project-card:hover {
  border-color: var(--border-accent);
  transform: translateY(-3px);
  box-shadow: 0 16px 40px rgba(0,0,0,0.3);
}

.project-img-wrap {
  position: relative;
  overflow: hidden;
  aspect-ratio: 16/9;
}
.project-card.featured .project-img-wrap {
  aspect-ratio: auto;
  height: 100%;
}

.project-img-wrap img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s;
  filter: brightness(0.85) saturate(0.9);
}
.project-card:hover .project-img-wrap img { transform: scale(1.04); }

.project-overlay {
  position: absolute;
  top: 1rem;
  right: 1rem;
}

.proj-lang {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  background: rgba(8,12,16,0.85);
  border: 1px solid var(--border);
  color: var(--accent);
  padding: 0.25rem 0.6rem;
  border-radius: 4px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  backdrop-filter: blur(4px);
}

.project-info {
  padding: 1.5rem;
}

.proj-header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin-bottom: 0.5rem;
}

.proj-header h3 {
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text);
}

.proj-year {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--text-dim);
}

.project-info p {
  font-size: 0.88rem;
  color: var(--text-muted);
  line-height: 1.6;
  margin-bottom: 1rem;
}

/* =====================================
   CONTACT PAGE
===================================== */
#contact-page {
  padding-top: 80px;
  min-height: 100vh;
  display: flex;
  align-items: center;
}

.contact-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 5rem;
  align-items: start;
  padding-top: 5rem;
  padding-bottom: 5rem;
}

.contact-left .page-hero,
.contact-left h1 {
  padding-top: 0;
}

.contact-direct {
  margin-top: 2rem;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.contact-item {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
}
.contact-label {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.1em;
}
.contact-item a, .contact-item span {
  font-size: 0.95rem;
  color: var(--text-muted);
  transition: color 0.2s;
}
.contact-item a:hover { color: var(--accent); }

.resume-section {
  margin-top: 2.5rem;
  padding-top: 2rem;
  border-top: 1px solid var(--border);
}
.resume-label {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--text-dim);
  letter-spacing: 0.08em;
  margin-bottom: 1rem !important;
}

.contact-form {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 2.5rem;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.form-group label {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.contact-form input,
.contact-form textarea {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text);
  font-family: var(--font-body);
  font-size: 0.9rem;
  padding: 0.85rem 1rem;
  transition: border-color 0.2s;
  resize: none;
  font-weight: 300;
}
.contact-form input::placeholder,
.contact-form textarea::placeholder { color: var(--text-dim); }
.contact-form input:focus,
.contact-form textarea:focus {
  outline: none;
  border-color: var(--border-accent);
}

#form-status {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--accent-green);
  text-align: center;
  min-height: 1.2em;
}

/* =====================================
   FOOTER
===================================== */
footer {
  border-top: 1px solid var(--border);
  padding: 2.5rem 3rem;
}

.footer-inner {
  max-width: 1100px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.footer-logo {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1rem;
  color: var(--accent);
}

.footer-inner p {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-dim);
}
.footer-inner p a { color: var(--text-muted); transition: color 0.2s; }
.footer-inner p a:hover { color: var(--accent); }

.footer-links {
  display: flex;
  gap: 1.5rem;
}
.footer-links a {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  transition: color 0.2s;
}
.footer-links a:hover { color: var(--accent); }

/* =====================================
   ANIMATIONS
===================================== */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}
@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

/* =====================================
   RESPONSIVE
===================================== */
@media (max-width: 900px) {
  .hero-inner {
    grid-template-columns: 1fr;
    gap: 3rem;
    text-align: center;
  }
  .hero-sub { margin: 0 auto 2.5rem; }
  .hero-cta { justify-content: center; }
  .hero-links { justify-content: center; }
  .eyebrow { justify-content: center; }
  .hero-right { flex-direction: row; flex-wrap: wrap; justify-content: center; }

  .timeline::before { display: none; }
  .timeline-item { grid-template-columns: 1fr; gap: 0.5rem; }
  .timeline-meta { flex-direction: row; align-items: center; padding-right: 0; }
  .timeline-content { padding-left: 0; }
  .timeline-content::before { display: none; }

  .skills-grid { grid-template-columns: 1fr; }
  .awards-row { grid-template-columns: repeat(2, 1fr); }
  .projects-grid { grid-template-columns: 1fr; }
  .project-card.featured { grid-column: span 1; grid-template-columns: 1fr; }
  .contact-layout { grid-template-columns: 1fr; gap: 3rem; }

  header { padding: 1rem 1.5rem; }
  .section-inner { padding: 4rem 1.5rem; }
  footer { padding: 2rem 1.5rem; }
  .footer-inner { flex-direction: column; text-align: center; }
}

@media (max-width: 600px) {
  .awards-row { grid-template-columns: 1fr 1fr; }
  .stat-cards { gap: 0.5rem; }
}