:root {
  --bg: #0b1220;
  --bg-alt: #0f1830;
  --surface: #131f3a;
  --surface-2: #182a4d;
  --border: rgba(255,255,255,0.08);
  --text: #e7ecf7;
  --text-dim: #9fb0cf;
  --text-dimmer: #6d7fa0;
  --blue: #4f8ff7;
  --blue-2: #7db6ff;
  --violet: #8b7cf6;
  --amber: #ffb454;
  --max: 1120px;
  --radius: 18px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.65;
  overflow-x: hidden;
  position: relative;
}

a { color: var(--blue-2); text-decoration: none; }
a:hover { text-decoration: none; }

h1, h2, h3 { font-family: 'Inter', sans-serif; color: var(--text); margin: 0 0 12px; letter-spacing: -0.02em; }
h2 { font-size: 36px; font-weight: 800; margin-bottom: 8px; }
h3 { font-size: 19px; font-weight: 700; }

.gradient-text {
  background: linear-gradient(135deg, var(--blue-2), var(--violet));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hl { color: var(--blue-2); font-weight: 600; }

.section { padding: 110px 24px; position: relative; }
.section-alt { background: var(--bg-alt); }
.section-inner { max-width: var(--max); margin: 0 auto; position: relative; z-index: 1; }
.section-eyebrow {
  text-transform: uppercase; letter-spacing: 2px; font-size: 12.5px; font-weight: 700;
  color: var(--blue-2); margin: 0 0 10px;
}

/* Background decoration */
.bg-mesh {
  position: fixed; top: -20%; left: -10%; width: 70%; height: 70%;
  background: radial-gradient(circle, rgba(79,143,247,0.18), transparent 60%);
  filter: blur(60px); pointer-events: none; z-index: 0;
}
.bg-grid {
  position: fixed; inset: 0; pointer-events: none; z-index: 0; opacity: 0.4;
  background-image: linear-gradient(rgba(255,255,255,0.025) 1px, transparent 1px),
                     linear-gradient(90deg, rgba(255,255,255,0.025) 1px, transparent 1px);
  background-size: 44px 44px;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 0%, black 40%, transparent 100%);
}
.mesh-contact {
  position: absolute; inset: 0; top: 0; left: 50%; transform: translateX(-50%);
  width: 60%; height: 100%;
  background: radial-gradient(circle, rgba(139,124,246,0.15), transparent 65%);
}

/* Reveal animation */
.reveal { opacity: 0; transform: translateY(24px); transition: opacity 0.7s ease, transform 0.7s ease; }
.reveal.in-view { opacity: 1; transform: translateY(0); }

/* NAV */
.nav {
  position: sticky; top: 0; z-index: 50;
  background: rgba(11,18,32,0.7);
  backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border);
  transition: background 0.3s;
}
.nav-inner {
  max-width: var(--max); margin: 0 auto;
  display: flex; align-items: center; justify-content: space-between;
  padding: 16px 24px;
}
.logo { display: flex; align-items: center; gap: 10px; font-weight: 800; color: var(--text); font-size: 16px; }
.logo-mark {
  display: inline-flex; align-items: center; justify-content: center;
  width: 30px; height: 30px; border-radius: 9px;
  background: linear-gradient(135deg, var(--blue), var(--violet));
  color: white; font-size: 15px; font-weight: 800;
}
.nav-links { display: flex; align-items: center; gap: 28px; }
.nav-links a { color: var(--text-dim); font-weight: 500; font-size: 14.5px; transition: color 0.2s; }
.nav-links a:hover { color: var(--text); }
.nav-cta {
  background: var(--surface-2); color: var(--text) !important; padding: 8px 18px !important;
  border-radius: 30px; border: 1px solid var(--border);
}
.nav-toggle { display: none; flex-direction: column; gap: 5px; background: none; border: none; cursor: pointer; padding: 6px; }
.nav-toggle span { width: 22px; height: 2px; background: var(--text); border-radius: 2px; }

/* HERO */
.hero { padding: 150px 24px 100px; position: relative; }
.hero-inner {
  max-width: var(--max); margin: 0 auto;
  display: flex; align-items: center; gap: 56px; flex-wrap: wrap; position: relative; z-index: 1;
}
.hero-text { flex: 1 1 460px; }
.eyebrow {
  display: inline-block; font-size: 13.5px; color: var(--text-dim); font-weight: 600;
  background: var(--surface); border: 1px solid var(--border); padding: 6px 16px; border-radius: 30px;
  margin-bottom: 24px;
}
.hero h1 { font-size: 52px; font-weight: 900; line-height: 1.12; margin-bottom: 22px; }
.tagline { font-size: 18.5px; color: var(--text-dim); max-width: 540px; margin-bottom: 32px; }
.hero-actions { display: flex; gap: 14px; margin-bottom: 32px; flex-wrap: wrap; }
.hero-links { display: flex; gap: 26px; flex-wrap: wrap; }
.hero-links a { color: var(--text-dim); font-weight: 500; font-size: 14.5px; display: inline-flex; align-items: center; gap: 7px; transition: color 0.2s; }
.hero-links a:hover { color: var(--blue-2); }

.btn {
  display: inline-flex; align-items: center; gap: 8px; padding: 13px 26px; border-radius: 12px; font-weight: 600; font-size: 15px;
  transition: transform 0.2s, box-shadow 0.2s; cursor: pointer; border: none;
}
.btn-primary {
  background: linear-gradient(135deg, var(--blue), var(--violet)); color: white;
  box-shadow: 0 8px 28px rgba(79,143,247,0.35);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 12px 32px rgba(79,143,247,0.5); text-decoration: none; }
.btn-ghost {
  background: var(--surface); color: var(--text); border: 1px solid var(--border);
}
.btn-ghost:hover { background: var(--surface-2); transform: translateY(-2px); text-decoration: none; }

.hero-photo { flex: 0 0 300px; position: relative; display: flex; justify-content: center; }
.photo-ring {
  width: 280px; height: 280px; border-radius: 28px; padding: 4px;
  background: linear-gradient(135deg, var(--blue), var(--violet));
  box-shadow: 0 30px 60px rgba(0,0,0,0.5);
}
.photo-ring img {
  width: 100%; height: 100%; object-fit: cover; border-radius: 24px; display: block;
  background: var(--surface);
}
.floating-card {
  position: absolute; background: rgba(19,31,58,0.9); backdrop-filter: blur(10px);
  border: 1px solid var(--border); border-radius: 12px; padding: 10px 16px;
  font-size: 13px; font-weight: 600; color: var(--text); box-shadow: 0 10px 30px rgba(0,0,0,0.4);
  animation: float 5s ease-in-out infinite;
}
.card-1 { top: 8%; left: -15%; animation-delay: 0s; }
.card-2 { bottom: 18%; right: -18%; animation-delay: 1s; }
.card-3 { bottom: -6%; left: -5%; animation-delay: 2s; }
@keyframes float { 0%,100% { transform: translateY(0); } 50% { transform: translateY(-10px); } }

.scroll-cue { display: flex; justify-content: center; margin-top: 40px; }
.scroll-cue span {
  display: block; width: 22px; height: 36px; border: 2px solid var(--border); border-radius: 14px; position: relative;
}
.scroll-cue span::before {
  content: ''; position: absolute; top: 6px; left: 50%; transform: translateX(-50%);
  width: 4px; height: 8px; background: var(--blue-2); border-radius: 2px;
  animation: scrollDot 1.6s ease-in-out infinite;
}
@keyframes scrollDot { 0% { opacity: 1; top: 6px; } 100% { opacity: 0; top: 18px; } }

/* ABOUT */
.about-grid { display: grid; grid-template-columns: 1.2fr 1fr; gap: 48px; align-items: start; margin-top: 36px; }
.about-text p { color: var(--text-dim); font-size: 16.5px; }
.stat-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; }
.stat-card {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 26px 20px; text-align: center;
}
.stat-number { display: block; font-size: 34px; font-weight: 900; background: linear-gradient(135deg, var(--blue-2), var(--violet)); -webkit-background-clip: text; background-clip: text; color: transparent; }
.stat-label { display: block; font-size: 13px; color: var(--text-dimmer); margin-top: 6px; font-weight: 500; }

/* SKILLS */
.skills-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 20px; margin-top: 36px; }
.skill-card {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 26px;
  transition: transform 0.25s, border-color 0.25s;
}
.skill-card:hover { transform: translateY(-6px); border-color: rgba(79,143,247,0.4); }
.skill-icon { font-size: 26px; margin-bottom: 12px; }
.skill-card p { margin: 0; color: var(--text-dim); font-size: 14.5px; }

/* PROJECTS */
.projects-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); gap: 26px; margin-top: 36px; }
.project-card {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden;
  transition: transform 0.3s, box-shadow 0.3s;
  display: flex; flex-direction: column;
}
.project-card:hover { transform: translateY(-8px); box-shadow: 0 20px 50px rgba(0,0,0,0.4); }
.featured-project {
  grid-column: 1 / -1;
  border-color: rgba(255,180,84,0.35);
  background: linear-gradient(135deg, var(--surface), var(--surface-2));
}
.featured-project .project-thumb { aspect-ratio: 21/8; }
@media (min-width: 700px) {
  .featured-project { display: grid; grid-template-columns: 1.1fr 1fr; }
  .featured-project .project-thumb { aspect-ratio: auto; height: 100%; }
}
.project-thumb { width: 100%; aspect-ratio: 16/9.6; overflow: hidden; background: #0f1b33; }
.project-thumb img { width: 100%; height: 100%; object-fit: cover; display: block; transition: transform 0.4s; }
.project-card:hover .project-thumb img { transform: scale(1.05); }
.project-body { padding: 24px; display: flex; flex-direction: column; flex: 1; }
.project-tag {
  display: inline-block; background: rgba(79,143,247,0.15); color: var(--blue-2); font-size: 12px; font-weight: 700;
  padding: 4px 12px; border-radius: 20px; margin-bottom: 12px; width: fit-content;
  text-transform: uppercase; letter-spacing: 0.5px;
}
.project-body p { color: var(--text-dim); font-size: 14.5px; flex: 1; }
.project-link { font-weight: 600; margin-top: 12px; display: inline-flex; align-items: center; gap: 4px; color: var(--blue-2); }
.project-link span { transition: transform 0.2s; }
.project-link:hover span { transform: translateX(3px); }

/* CERTIFICATIONS */
.cert-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); gap: 20px; margin-top: 36px; }
.cert-card {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 26px; display: flex; gap: 18px; align-items: flex-start;
}
.cert-badge {
  flex: 0 0 52px; height: 52px; border-radius: 14px; background: linear-gradient(135deg, var(--blue), var(--violet));
  display: flex; align-items: center; justify-content: center; font-size: 24px;
}
.cert-card p { color: var(--text-dim); font-size: 14.5px; margin: 4px 0 8px; }

/* EXPERIENCE / TIMELINE */
.timeline { position: relative; margin-top: 36px; padding-left: 30px; }
.timeline::before {
  content: ''; position: absolute; left: 6px; top: 8px; bottom: 8px; width: 2px;
  background: linear-gradient(var(--blue), var(--violet));
}
.timeline-item { position: relative; margin-bottom: 40px; }
.timeline-item:last-child { margin-bottom: 0; }
.timeline-dot {
  position: absolute; left: -30px; top: 4px; width: 14px; height: 14px; border-radius: 50%;
  background: var(--bg); border: 3px solid var(--blue-2); box-shadow: 0 0 0 4px rgba(79,143,247,0.15);
}
.timeline-content {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 24px;
}
.job-head { display: flex; justify-content: space-between; align-items: baseline; flex-wrap: wrap; gap: 8px; margin-bottom: 10px; }
.job-dates { color: var(--text-dimmer); font-size: 13.5px; font-family: 'JetBrains Mono', monospace; }
.timeline-content ul { padding-left: 18px; color: var(--text-dim); font-size: 14.5px; margin: 0; }
.timeline-content li { margin-bottom: 6px; }

/* CONTACT */
.contact { text-align: center; }
.contact-sub { color: var(--text-dim); font-size: 16px; }
.contact-links { display: flex; justify-content: center; gap: 14px; margin-top: 28px; flex-wrap: wrap; }

.footer { text-align: center; padding: 36px 24px; color: var(--text-dimmer); font-size: 13px; border-top: 1px solid var(--border); position: relative; z-index: 1; }

@media (max-width: 860px) {
  .nav-links {
    position: absolute; top: 100%; left: 0; right: 0; flex-direction: column; align-items: flex-start;
    background: rgba(11,18,32,0.98); padding: 20px 24px; gap: 16px; border-bottom: 1px solid var(--border);
    display: none;
  }
  .nav-links.open { display: flex; }
  .nav-toggle { display: flex; }
  .about-grid { grid-template-columns: 1fr; }
  .hero h1 { font-size: 38px; }
  .hero-photo { flex: 0 0 auto; margin-top: 20px; }
  .photo-ring { width: 220px; height: 220px; }
  .floating-card { display: none; }
  .hero-inner { flex-direction: column-reverse; text-align: center; }
  .hero-links, .hero-actions { justify-content: center; }
  .about-text { text-align: left; }
}