:root {
  --bg: #0a0a0f;
  --bg-soft: #111119;
  --bg-card: rgba(255, 255, 255, 0.03);
  --bg-card-hover: rgba(255, 255, 255, 0.06);
  --border: rgba(255, 255, 255, 0.08);
  --border-strong: rgba(255, 255, 255, 0.14);
  --text: #e8e8f0;
  --text-dim: #9a9aae;
  --text-faint: #6b6b7e;
  --accent: #7c5cff;
  --accent-2: #2dd4bf;
  --accent-3: #f472b6;
  --radius: 16px;
  --radius-sm: 10px;
  --maxw: 1120px;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

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

html { scroll-behavior: smooth; scroll-padding-top: 90px; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: "Inter", system-ui, sans-serif;
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
  position: relative;
}

a { color: inherit; text-decoration: none; }
ul { list-style: none; }

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

/* ---------- Background decoration ---------- */
.bg-grid {
  position: fixed; inset: 0; z-index: -2;
  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: 56px 56px;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 0%, #000 40%, transparent 100%);
}
.bg-glow {
  position: fixed; z-index: -1; border-radius: 50%;
  filter: blur(120px); opacity: 0.35; pointer-events: none;
}
.bg-glow--1 {
  width: 520px; height: 520px; top: -160px; left: -120px;
  background: radial-gradient(circle, var(--accent), transparent 70%);
  animation: float 18s ease-in-out infinite;
}
.bg-glow--2 {
  width: 460px; height: 460px; top: 30%; right: -160px;
  background: radial-gradient(circle, var(--accent-2), transparent 70%);
  animation: float 22s ease-in-out infinite reverse;
}
@keyframes float {
  0%, 100% { transform: translate(0, 0); }
  50% { transform: translate(40px, 30px); }
}

/* ---------- Scroll progress ---------- */
.scroll-progress {
  position: fixed; top: 0; left: 0; height: 3px; width: 0;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  z-index: 100; transition: width 0.1s linear;
}

/* ---------- Nav ---------- */
.nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 50;
  display: flex; align-items: center; justify-content: space-between;
  padding: 18px 6vw;
  transition: background 0.3s, backdrop-filter 0.3s, padding 0.3s, border-color 0.3s;
  border-bottom: 1px solid transparent;
}
.nav.scrolled {
  background: rgba(10, 10, 15, 0.72);
  backdrop-filter: blur(14px);
  border-bottom-color: var(--border);
  padding: 12px 6vw;
}
.nav__brand { display: flex; align-items: center; gap: 10px; font-weight: 600; }
.nav__brand-mark {
  display: grid; place-items: center;
  width: 34px; height: 34px; border-radius: 9px;
  background: linear-gradient(135deg, var(--accent), var(--accent-3));
  font-size: 13px; font-weight: 700; letter-spacing: 0.5px;
  font-family: "Space Grotesk", sans-serif;
}
.nav__brand-name { font-size: 15px; letter-spacing: 0.2px; }
.nav__links { display: flex; align-items: center; gap: 28px; }
.nav__links a {
  font-size: 14px; color: var(--text-dim);
  transition: color 0.2s; position: relative;
}
.nav__links a:not(.nav__cta)::after {
  content: ""; position: absolute; left: 0; bottom: -6px;
  width: 0; height: 1.5px; background: var(--accent);
  transition: width 0.25s var(--ease);
}
.nav__links a:not(.nav__cta):hover { color: var(--text); }
.nav__links a:not(.nav__cta):hover::after { width: 100%; }
.nav__cta {
  padding: 8px 18px; border-radius: 999px;
  border: 1px solid var(--border-strong);
  background: var(--bg-card); transition: all 0.25s var(--ease);
}
.nav__cta:hover { background: var(--accent); border-color: var(--accent); color: #fff; }
.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;
  transition: transform 0.3s, opacity 0.3s;
}
.nav__toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav__toggle.open span:nth-child(2) { opacity: 0; }
.nav__toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ---------- Layout ---------- */
main { max-width: var(--maxw); margin: 0 auto; padding: 0 6vw; }

.section { padding: 110px 0; border-top: 1px solid var(--border); }
.section__head { display: flex; align-items: baseline; gap: 18px; margin-bottom: 50px; }
.section__index {
  font-family: "Space Grotesk", sans-serif;
  font-size: 13px; color: var(--accent); font-weight: 600;
}
.section__title {
  font-family: "Space Grotesk", sans-serif;
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  font-weight: 700; letter-spacing: -0.02em;
}

/* ---------- Hero ---------- */
.hero {
  min-height: 100vh; display: flex; flex-direction: column;
  justify-content: center; position: relative; padding: 120px 0 60px;
}
.hero__inner { max-width: 760px; }
.hero__eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 13px; color: var(--text-dim);
  padding: 7px 14px; border: 1px solid var(--border);
  border-radius: 999px; background: var(--bg-card); margin-bottom: 28px;
}
.hero__status-dot {
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--accent-2); box-shadow: 0 0 0 0 var(--accent-2);
  animation: pulse 2s infinite;
}
@keyframes pulse {
  0% { box-shadow: 0 0 0 0 rgba(45, 212, 191, 0.6); }
  70% { box-shadow: 0 0 0 10px rgba(45, 212, 191, 0); }
  100% { box-shadow: 0 0 0 0 rgba(45, 212, 191, 0); }
}
.hero__title {
  font-family: "Space Grotesk", sans-serif;
  font-size: clamp(2.4rem, 6.5vw, 4.6rem);
  font-weight: 700; line-height: 1.05; letter-spacing: -0.03em;
  margin-bottom: 26px;
}
.text-gradient {
  background: linear-gradient(120deg, var(--accent), var(--accent-2) 60%, var(--accent-3));
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent;
}
.hero__subtitle {
  font-size: 1.12rem; color: var(--text-dim);
  max-width: 580px; margin-bottom: 36px;
}
.hero__actions { display: flex; gap: 14px; flex-wrap: wrap; margin-bottom: 40px; }
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  padding: 13px 28px; border-radius: 999px;
  font-size: 14px; font-weight: 500; cursor: pointer;
  transition: all 0.25s var(--ease); border: 1px solid transparent;
}
.btn--primary {
  background: var(--accent); color: #fff;
  box-shadow: 0 8px 24px -8px rgba(124, 92, 255, 0.6);
}
.btn--primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 14px 30px -8px rgba(124, 92, 255, 0.75);
}
.btn--ghost { border-color: var(--border-strong); color: var(--text); }
.btn--ghost:hover { background: var(--bg-card-hover); transform: translateY(-2px); }

.hero__meta { display: flex; flex-wrap: wrap; gap: 10px; }
.chip {
  display: inline-flex; align-items: center; gap: 7px;
  font-size: 13px; color: var(--text-dim);
  padding: 8px 14px; border: 1px solid var(--border);
  border-radius: 999px; background: var(--bg-card);
  transition: all 0.2s var(--ease);
}
.chip:hover { color: var(--text); border-color: var(--border-strong); transform: translateY(-1px); }

.hero__scroll {
  position: absolute; bottom: 30px; left: 50%; transform: translateX(-50%);
  width: 26px; height: 42px; border: 2px solid var(--border-strong);
  border-radius: 14px; display: flex; justify-content: center; padding-top: 7px;
}
.hero__scroll span {
  width: 3px; height: 8px; border-radius: 2px; background: var(--text-dim);
  animation: scrollDot 1.8s infinite;
}
@keyframes scrollDot {
  0% { transform: translateY(0); opacity: 1; }
  100% { transform: translateY(14px); opacity: 0; }
}

/* ---------- About ---------- */
.about { display: grid; grid-template-columns: 1.4fr 1fr; gap: 60px; align-items: start; }
.about__text p { margin-bottom: 18px; color: var(--text-dim); }
.about__text strong { color: var(--text); }
.about__stats {
  display: grid; grid-template-columns: 1fr 1fr; gap: 14px;
  position: sticky; top: 100px;
}
.stat {
  padding: 22px; border: 1px solid var(--border); border-radius: var(--radius);
  background: var(--bg-card); transition: all 0.25s var(--ease);
}
.stat:hover { transform: translateY(-3px); border-color: var(--border-strong); }
.stat__num {
  display: block; font-family: "Space Grotesk", sans-serif;
  font-size: 2rem; font-weight: 700; color: var(--text); margin-bottom: 4px;
}
.stat__label { font-size: 12.5px; color: var(--text-faint); }

/* ---------- Timeline ---------- */
.timeline { position: relative; padding-left: 28px; }
.timeline::before {
  content: ""; position: absolute; left: 6px; top: 6px; bottom: 6px;
  width: 1.5px; background: linear-gradient(var(--accent), transparent);
}
.timeline__item { position: relative; padding-bottom: 10px; }
.timeline__dot {
  position: absolute; left: -28px; top: 6px;
  width: 14px; height: 14px; border-radius: 50%;
  background: var(--bg); border: 2.5px solid var(--accent);
  box-shadow: 0 0 0 4px rgba(124, 92, 255, 0.15);
}
.timeline__content {
  padding: 26px 28px; border: 1px solid var(--border);
  border-radius: var(--radius); background: var(--bg-card);
  transition: all 0.25s var(--ease);
}
.timeline__content:hover { border-color: var(--border-strong); transform: translateX(4px); }
.timeline__header {
  display: flex; justify-content: space-between; align-items: flex-start;
  gap: 16px; margin-bottom: 14px; flex-wrap: wrap;
}
.timeline__content h3 { font-size: 1.15rem; font-family: "Space Grotesk", sans-serif; }
.timeline__org { color: var(--accent); font-size: 14px; margin-top: 2px; }
.timeline__date {
  font-size: 12.5px; color: var(--text-faint);
  padding: 4px 12px; border: 1px solid var(--border); border-radius: 999px;
  white-space: nowrap;
}
.timeline__content ul li {
  position: relative; padding-left: 20px; margin-bottom: 8px;
  color: var(--text-dim); font-size: 14.5px;
}
.timeline__content ul li::before {
  content: ""; position: absolute; left: 0; top: 9px;
  width: 6px; height: 6px; border-radius: 50%; background: var(--accent);
}
.timeline__content strong { color: var(--text); }

/* ---------- Projects ---------- */
.projects { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 22px; }
.project {
  padding: 30px; border: 1px solid var(--border); border-radius: var(--radius);
  background: var(--bg-card); transition: all 0.3s var(--ease);
  display: flex; flex-direction: column; position: relative; overflow: hidden;
}
.project::before {
  content: ""; position: absolute; top: 0; left: 0; right: 0; height: 1px;
  background: linear-gradient(90deg, transparent, var(--accent), transparent);
  opacity: 0; transition: opacity 0.3s;
}
.project:hover {
  transform: translateY(-4px); border-color: var(--border-strong);
  background: var(--bg-card-hover);
}
.project:hover::before { opacity: 1; }
.project__icon {
  width: 48px; height: 48px; border-radius: 12px;
  display: grid; place-items: center; margin-bottom: 18px;
  background: linear-gradient(135deg, rgba(124,92,255,0.18), rgba(45,212,191,0.12));
  color: var(--accent);
}
.project__title {
  font-family: "Space Grotesk", sans-serif; font-size: 1.18rem;
  font-weight: 600; margin-bottom: 10px; letter-spacing: -0.01em;
}
.project__desc { color: var(--text-dim); font-size: 14.5px; margin-bottom: 16px; }
.project__points { margin-bottom: 18px; }
.project__points li {
  position: relative; padding-left: 18px; margin-bottom: 7px;
  color: var(--text-dim); font-size: 13.5px;
}
.project__points li::before {
  content: "▹"; position: absolute; left: 0; color: var(--accent-2);
}
.project__points strong { color: var(--text); }
.project__tags { display: flex; flex-wrap: wrap; gap: 6px; margin-top: auto; }
.project__tags span {
  font-size: 11.5px; padding: 4px 10px; border-radius: 6px;
  background: rgba(124, 92, 255, 0.1); color: var(--accent);
  border: 1px solid rgba(124, 92, 255, 0.18);
}

/* ---------- Skills ---------- */
.skills { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 18px; }
.skill-group {
  padding: 24px; border: 1px solid var(--border); border-radius: var(--radius);
  background: var(--bg-card); transition: all 0.25s var(--ease);
}
.skill-group:hover { border-color: var(--border-strong); transform: translateY(-2px); }
.skill-group h3 {
  font-family: "Space Grotesk", sans-serif; font-size: 0.95rem;
  font-weight: 600; color: var(--text); margin-bottom: 14px;
  display: flex; align-items: center; gap: 8px;
}
.skill-group h3::before {
  content: ""; width: 4px; height: 16px; border-radius: 2px;
  background: linear-gradient(var(--accent), var(--accent-2));
}
.skill-group__chips { display: flex; flex-wrap: wrap; gap: 8px; }
.skill-group__chips span {
  font-size: 12.5px; padding: 6px 12px; border-radius: 7px;
  background: rgba(255,255,255,0.04); color: var(--text-dim);
  border: 1px solid var(--border); transition: all 0.2s;
}
.skill-group__chips span:hover { color: var(--text); background: rgba(124,92,255,0.12); border-color: rgba(124,92,255,0.3); }

/* ---------- Achievements ---------- */
.achievements { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 16px; }
.achievement {
  display: flex; gap: 16px; padding: 24px;
  border: 1px solid var(--border); border-radius: var(--radius);
  background: var(--bg-card); transition: all 0.25s var(--ease);
}
.achievement:hover { transform: translateY(-2px); border-color: var(--border-strong); }
.achievement__icon {
  font-size: 1.6rem; line-height: 1; flex-shrink: 0;
  width: 46px; height: 46px; border-radius: 12px;
  display: grid; place-items: center;
  background: linear-gradient(135deg, rgba(124,92,255,0.16), rgba(244,114,182,0.12));
}
.achievement h3 { font-family: "Space Grotesk", sans-serif; font-size: 1rem; margin-bottom: 5px; }
.achievement p { color: var(--text-dim); font-size: 13.5px; }

/* ---------- Contact ---------- */
.contact { text-align: center; max-width: 720px; margin: 0 auto; }
.contact__headline {
  font-family: "Space Grotesk", sans-serif;
  font-size: clamp(1.6rem, 4vw, 2.4rem); font-weight: 700;
  letter-spacing: -0.02em; margin-bottom: 16px;
}
.contact__sub { color: var(--text-dim); margin-bottom: 38px; font-size: 1.05rem; }
.contact__links {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 14px;
}
.contact__card {
  display: flex; flex-direction: column; gap: 4px; text-align: left;
  padding: 22px; border: 1px solid var(--border); border-radius: var(--radius);
  background: var(--bg-card); transition: all 0.25s var(--ease);
}
.contact__card:hover {
  transform: translateY(-3px); border-color: var(--accent);
  background: var(--bg-card-hover);
}
.contact__card-label { font-size: 12px; color: var(--text-faint); text-transform: uppercase; letter-spacing: 0.08em; }
.contact__card-value { font-family: "Space Grotesk", sans-serif; font-weight: 500; color: var(--text); }

/* ---------- Footer ---------- */
.footer {
  border-top: 1px solid var(--border); padding: 32px 6vw;
  text-align: center; color: var(--text-faint); font-size: 13px;
}

/* ---------- Reveal animation ---------- */
.reveal { opacity: 0; transform: translateY(28px); transition: opacity 0.7s var(--ease), transform 0.7s var(--ease); }
.reveal.visible { opacity: 1; transform: translateY(0); }

/* ---------- Responsive ---------- */
@media (max-width: 860px) {
  .about { grid-template-columns: 1fr; gap: 36px; }
  .about__stats { position: static; }
}
@media (max-width: 720px) {
  .nav__links {
    position: fixed; top: 0; right: 0; height: 100vh; width: 75%; max-width: 320px;
    flex-direction: column; justify-content: center; align-items: flex-start;
    padding: 60px 36px; gap: 22px;
    background: var(--bg-soft); border-left: 1px solid var(--border);
    transform: translateX(100%); transition: transform 0.35s var(--ease);
    box-shadow: -20px 0 60px rgba(0,0,0,0.4);
  }
  .nav__links.open { transform: translateX(0); }
  .nav__toggle { display: flex; z-index: 60; }
  .section { padding: 80px 0; }
  .timeline { padding-left: 24px; }
  .about__stats { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 460px) {
  .about__stats { grid-template-columns: 1fr; }
  .hero__actions { flex-direction: column; }
  .btn { width: 100%; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
  .reveal { opacity: 1; transform: none; }
}