:root {
  --bg: #0b1220;
  --bg-alt: #0e1728;
  --surface: #121d30;
  --surface-2: #17233a;
  --accent: #5b7ff5;
  --accent-2: #2dd9c4;
  --accent-dim: #aec2f8;
  --gold: #e0ac4b;
  --text: #e3ebf5;
  --text-dim: #8b99b3;
  --border: #263856;
  --gradient: linear-gradient(120deg, var(--accent), var(--accent-2));
  --font-mono: 'Fira Code', 'JetBrains Mono', Consolas, 'Courier New', monospace;
  --font-sans: 'Segoe UI', system-ui, sans-serif;
}

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

html { scroll-behavior: smooth; }

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

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

::-webkit-scrollbar { width: 10px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: var(--surface-2); border-radius: 5px; border: 2px solid var(--bg); }
::-webkit-scrollbar-thumb:hover { background: var(--accent); }

.neon {
  background: var(--gradient);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

/* ---------- Navbar ---------- */
#navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  background: rgba(11,18,32,0.92);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
  transition: transform 0.3s ease;
}

.nav-inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 18px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: 1.15rem;
  color: var(--text);
  text-decoration: none;
  letter-spacing: 0.3px;
}

.nav-links {
  display: flex;
  gap: 32px;
  list-style: none;
  font-size: 0.92rem;
}

.nav-links a {
  color: var(--text-dim);
  text-decoration: none;
  position: relative;
  transition: color 0.2s;
  padding-bottom: 4px;
  border-bottom: 1px solid transparent;
}

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

.nav-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--text);
  font-size: 1.5rem;
  cursor: pointer;
}

/* ---------- Hero ---------- */
.hero {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 100px 24px 40px;
  position: relative;
  overflow: hidden;
}

.hero-glow {
  position: absolute;
  border-radius: 50%;
  filter: blur(90px);
  opacity: 0.32;
  z-index: 0;
  pointer-events: none;
  animation: floatGlow 14s ease-in-out infinite;
}
.glow-1 { width: 420px; height: 420px; background: var(--accent); top: -120px; left: -100px; }
.glow-2 { width: 380px; height: 380px; background: var(--accent-2); bottom: -140px; right: -80px; animation-delay: -4s; }
.glow-3 { width: 300px; height: 300px; background: var(--gold); top: 30%; right: 15%; animation-delay: -8s; opacity: 0.2; }

@keyframes floatGlow {
  0%, 100% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(30px, -30px) scale(1.12); }
}

.hero-content { max-width: 780px; position: relative; z-index: 1; }

.hero-pretitle {
  font-family: var(--font-sans);
  text-transform: uppercase;
  letter-spacing: 3px;
  color: var(--gold);
  margin-bottom: 14px;
  font-size: 0.9rem;
  font-weight: 600;
}

.hero-title {
  font-size: clamp(2.4rem, 7vw, 4.2rem);
  font-weight: 700;
  color: var(--text);
  margin-bottom: 14px;
  letter-spacing: -0.5px;
}

.hero-subtitle {
  font-family: var(--font-sans);
  font-weight: 400;
  font-size: clamp(1.05rem, 2.6vw, 1.4rem);
  color: var(--text-dim);
  margin-bottom: 24px;
  min-height: 2.2rem;
}

.cursor { color: var(--accent-2); animation: blink 0.9s step-end infinite; }
@keyframes blink { 50% { opacity: 0; } }

.hero-desc {
  color: var(--text-dim);
  font-size: 1.05rem;
  max-width: 560px;
  margin: 0 auto 32px;
}

.hero-buttons {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 32px;
}

.btn {
  display: inline-block;
  padding: 14px 30px;
  border-radius: 4px;
  font-family: var(--font-sans);
  font-weight: 600;
  text-decoration: none;
  font-size: 0.95rem;
  cursor: pointer;
  transition: all 0.25s ease;
  border: 1px solid transparent;
}

.btn-primary {
  background: var(--gradient);
  background-size: 160% 160%;
  color: #06111f;
  font-weight: 700;
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 28px rgba(91,127,245,0.4);
  background-position: 100% 0;
}

.btn-outline {
  border-color: var(--border);
  color: var(--text);
  background: transparent;
}
.btn-outline:hover { border-color: var(--accent-2); color: var(--accent-2); transform: translateY(-2px); }

.hero-socials {
  display: flex;
  gap: 16px;
  justify-content: center;
}

.hero-socials a {
  width: 42px; height: 42px;
  display: flex; align-items: center; justify-content: center;
  border: 1px solid var(--border);
  border-radius: 50%;
  color: var(--text-dim);
  text-decoration: none;
  font-family: var(--font-sans);
  font-size: 0.78rem;
  font-weight: 600;
  transition: all 0.25s;
}
.hero-socials a:hover {
  border-color: var(--accent-2);
  color: var(--accent-2);
  transform: translateY(-3px);
  box-shadow: 0 8px 20px rgba(45,217,196,0.25);
}

/* ---------- Stats strip ---------- */
.stats-strip {
  background: var(--bg-alt);
  border-bottom: 1px solid var(--border);
  padding: 44px 24px;
}

.stats-inner {
  max-width: 700px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  text-align: center;
}

.stat { display: flex; flex-direction: column; align-items: center; }
.stat-value { display: flex; align-items: flex-start; }

.stat-num {
  font-size: clamp(2rem, 4vw, 2.6rem);
  font-weight: 800;
  background: var(--gradient);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  line-height: 1;
}

.stat-plus {
  font-size: 1.4rem;
  font-weight: 800;
  color: var(--accent-2);
  margin-left: 2px;
  vertical-align: top;
}

.stat-label {
  margin-top: 8px;
  font-size: 0.85rem;
  color: var(--text-dim);
}

@media (max-width: 640px) {
  .stats-inner { grid-template-columns: repeat(2, 1fr); gap: 32px; }
  .stat:last-child { grid-column: span 2; }
}

/* ---------- Sections ---------- */
.section {
  max-width: 1100px;
  margin: 0 auto;
  padding: 110px 24px;
}

.section.alt {
  max-width: none;
  background: var(--bg-alt);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}
.section.alt > * { max-width: 1100px; margin-left: auto; margin-right: auto; }

.section-title {
  font-size: clamp(1.5rem, 3.5vw, 2rem);
  font-weight: 700;
  margin-bottom: 50px;
  display: flex;
  align-items: center;
  gap: 14px;
}

.section-title::after {
  content: "";
  flex: 1;
  height: 1px;
  background: var(--border);
  margin-left: 10px;
}

.tag {
  font-family: var(--font-sans);
  background: var(--gradient);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  font-weight: 700;
  font-size: 1.05rem;
}

.reveal { opacity: 0; transform: translateY(40px); transition: opacity 0.7s ease, transform 0.7s ease; }
.reveal.visible { opacity: 1; transform: translateY(0); }

/* ---------- About ---------- */
.about-grid {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 50px;
  align-items: start;
}

.about-text p { color: var(--text-dim); margin-bottom: 16px; }
.about-text strong { color: var(--text); }

.about-facts {
  list-style: none;
  margin-top: 20px;
  display: grid;
  gap: 10px;
  font-size: 0.92rem;
}
.about-facts li { display: flex; gap: 10px; color: var(--text); }

.code-window {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
  box-shadow: 0 20px 50px rgba(0,0,0,0.4);
}

.code-header {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 12px 16px;
  background: var(--surface-2);
  border-bottom: 1px solid var(--border);
}

.dot { width: 11px; height: 11px; border-radius: 50%; }
.dot.red { background: #a94442; }
.dot.yellow { background: #b89144; }
.dot.green { background: #4c8a5e; }
.code-filename { margin-left: 10px; font-family: var(--font-mono); font-size: 0.8rem; color: var(--text-dim); }

.code-window pre {
  padding: 22px;
  overflow-x: auto;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  line-height: 1.7;
}

.c-kw { color: #d18ec2; }
.c-var { color: #7fb8d9; }
.c-key { color: var(--accent-dim); }
.c-str { color: #d9c37f; }
.c-bool { color: #a58fd0; }
.c-fn { color: #7fb8d9; }

/* ---------- Skills ---------- */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.skill-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 26px;
  transition: transform 0.25s, border-color 0.25s;
}
.skill-card:hover { transform: translateY(-5px); border-color: var(--accent); box-shadow: 0 16px 34px rgba(91,127,245,0.18); }

.skill-card h4 {
  color: var(--text);
  font-family: var(--font-sans);
  margin-bottom: 20px;
  font-size: 1.05rem;
  font-weight: 600;
}

.skill-bar { margin-bottom: 16px; }
.skill-name { display: block; font-size: 0.85rem; margin-bottom: 6px; color: var(--text-dim); }

.bar { height: 6px; background: var(--surface-2); border-radius: 4px; overflow: hidden; }
.fill {
  height: 100%;
  width: 0;
  background: var(--accent);
  border-radius: 4px;
  transition: width 1.4s cubic-bezier(.2,.8,.2,1);
}
.fill.animate { width: var(--pct); }

/* ---------- Experience / Education split ---------- */
.experience-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
}

.experience-subtitle {
  font-size: 1rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--accent-2);
  margin-bottom: 28px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border);
}

/* ---------- Timeline ---------- */
.timeline {
  position: relative;
  padding-left: 34px;
  border-left: 2px solid var(--border);
}

.timeline-item { position: relative; padding-bottom: 46px; }
.timeline-item:last-child { padding-bottom: 0; }

.timeline-dot {
  position: absolute;
  left: -42px;
  top: 4px;
  width: 16px; height: 16px;
  border-radius: 50%;
  background: var(--bg);
  border: 3px solid var(--accent);
  box-shadow: 0 0 0 4px rgba(45,217,196,0.15);
}

.timeline-date {
  font-family: var(--font-sans);
  color: var(--gold);
  font-size: 0.85rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.timeline-content h4 {
  margin: 8px 0 10px;
  font-size: 1.15rem;
  color: var(--text);
  font-weight: 600;
}

.company { color: var(--text-dim); font-weight: 400; font-size: 0.95rem; }
.timeline-content p { color: var(--text-dim); margin-bottom: 12px; }

.tags { display: flex; flex-wrap: wrap; gap: 8px; }
.tags span {
  font-family: var(--font-sans);
  font-size: 0.75rem;
  font-weight: 600;
  padding: 4px 10px;
  border-radius: 4px;
  background: var(--surface-2);
  border: 1px solid var(--border);
  color: var(--accent-dim);
}

/* ---------- Projects ---------- */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 26px;
}

.project-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 26px;
  display: flex;
  flex-direction: column;
  transition: transform 0.3s, box-shadow 0.3s, border-color 0.3s;
}
.project-card {
  position: relative;
  overflow: hidden;
}
.project-card::before {
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: var(--gradient);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.3s ease;
}
.project-card:hover::before { transform: scaleX(1); }
.project-card:hover {
  transform: translateY(-6px);
  border-color: var(--accent);
  box-shadow: 0 20px 40px rgba(0,0,0,0.35);
}

.project-top { display: flex; justify-content: space-between; align-items: center; margin-bottom: 18px; }
.folder-icon {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 1px;
  color: var(--text-dim);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 3px 8px;
}
.project-links { display: flex; gap: 12px; }
.project-links a {
  color: var(--text-dim);
  text-decoration: none;
  font-family: var(--font-sans);
  font-size: 0.85rem;
  font-weight: 600;
  transition: color 0.2s;
}
.project-links a:hover { color: var(--accent-dim); }

.project-card h4 { font-size: 1.2rem; margin-bottom: 10px; font-weight: 600; }
.project-card p { color: var(--text-dim); font-size: 0.92rem; margin-bottom: 18px; flex: 1; }

/* ---------- Contact ---------- */
.contact-lead { color: var(--text-dim); max-width: 600px; margin-bottom: 46px; }

.contact-grid {
  display: grid;
  grid-template-columns: 1.3fr 1fr;
  gap: 50px;
}

.contact-grid-solo {
  grid-template-columns: 1fr;
  max-width: 480px;
}

.contact-info { display: flex; flex-direction: column; gap: 26px; }
.contact-item { display: flex; gap: 16px; align-items: flex-start; }
.c-icon {
  width: 44px; height: 44px;
  display: flex; align-items: center; justify-content: center;
  border: 1px solid var(--border);
  border-radius: 50%;
  color: var(--accent-dim);
  flex-shrink: 0;
}
.contact-item a { color: var(--text-dim); text-decoration: none; transition: color 0.2s; }
.contact-item a:hover { color: var(--accent-dim); }

.socials-row { gap: 20px; }
.socials-row a { border: 1px solid var(--border); padding: 8px 16px; border-radius: 4px; font-weight: 600; font-size: 0.9rem; }
.socials-row a:hover { border-color: var(--accent); }

/* ---------- Footer ---------- */
.footer {
  text-align: center;
  padding: 34px 24px;
  border-top: 1px solid var(--border);
  color: var(--text-dim);
  font-family: var(--font-sans);
  font-size: 0.85rem;
}

/* ---------- Back to top ---------- */
#backToTop {
  position: fixed;
  bottom: 28px;
  right: 28px;
  width: 46px; height: 46px;
  border-radius: 50%;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
  font-size: 1.2rem;
  cursor: pointer;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s, transform 0.3s, border-color 0.3s;
  z-index: 90;
}
#backToTop.show { opacity: 1; pointer-events: auto; }
#backToTop {
  background: var(--surface);
}
#backToTop:hover {
  transform: translateY(-3px);
  border-color: var(--accent-2);
  color: var(--accent-2);
  box-shadow: 0 8px 20px rgba(45,217,196,0.25);
}

/* ---------- Responsive ---------- */
@media (max-width: 900px) {
  .skills-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 860px) {
  .about-grid, .contact-grid, .experience-grid { grid-template-columns: 1fr; }
  .experience-grid { gap: 50px; }
  .nav-links {
    position: fixed;
    top: 66px; right: 0;
    background: var(--bg-alt);
    border-left: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
    flex-direction: column;
    padding: 20px 30px;
    gap: 20px;
    transform: translateX(100%);
    transition: transform 0.3s ease;
  }
  .nav-links.open { transform: translateX(0); }
  .nav-toggle { display: block; }
}

@media (max-width: 520px) {
  .hero-buttons { flex-direction: column; align-items: stretch; }
  .skills-grid { grid-template-columns: 1fr; }
}