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

:root {
  --bg:         #070810;
  --bg-2:       #0d0f1e;
  --bg-3:       #111427;
  --surface:    #151829;
  --surface-2:  #1c2038;
  --border:     rgba(99,120,255,.13);
  --border-2:   rgba(99,120,255,.25);

  --accent:     #4f7bff;
  --accent-2:   #00d4ff;
  --accent-glow:rgba(79,123,255,.35);

  --text:       #e8ecff;
  --text-2:     #8892b0;
  --text-3:     #4a5270;

  --font-head:  'Syne', sans-serif;
  --font-body:  'DM Sans', sans-serif;
  --font-mono:  'JetBrains Mono', monospace;

  --radius:     12px;
  --radius-lg:  20px;
  --transition: .25s cubic-bezier(.4,0,.2,1);
}

html { scroll-behavior: smooth; font-size: 16px; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-weight: 300;
  line-height: 1.65;
  overflow-x: hidden;
}

/* custom scrollbar */
::-webkit-scrollbar { width: 4px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: var(--accent); border-radius: 2px; }

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

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

img { max-width: 100%; display: block; }

.container {
  max-width: 1140px;
  margin: 0 auto;
  padding: 0 2rem;
}

/* ── TYPOGRAPHY ─────────────────────────────────────────── */
.section-tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--accent-2);
  margin-bottom: 1.4rem;
}

.section-title {
  font-family: var(--font-head);
  font-size: clamp(2.2rem, 5vw, 3.8rem);
  font-weight: 800;
  line-height: 1.08;
  letter-spacing: -.02em;
  margin-bottom: 3rem;
}

.section-title em {
  font-style: italic;
  font-weight: 700;
  background: linear-gradient(120deg, var(--accent), var(--accent-2));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.accent { color: var(--accent-2); }

/* ── BUTTONS ────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  padding: .85rem 2rem;
  border-radius: 50px;
  font-family: var(--font-head);
  font-size: .9rem;
  font-weight: 600;
  letter-spacing: .02em;
  transition: var(--transition);
  cursor: pointer;
  border: none;
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #fff;
  box-shadow: 0 0 30px var(--accent-glow);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 0 50px var(--accent-glow);
}

.btn-ghost {
  background: transparent;
  color: var(--text);
  border: 1px solid var(--border-2);
}
.btn-ghost:hover {
  border-color: var(--accent);
  color: var(--accent-2);
  background: rgba(79,123,255,.07);
}

/* ── NAVBAR ─────────────────────────────────────────────── */
#navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  padding: 1.2rem 0;
  transition: background var(--transition), backdrop-filter var(--transition), padding var(--transition);
}

#navbar.scrolled {
  background: rgba(7,8,16,.85);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  padding: .7rem 0;
  border-bottom: 1px solid var(--border);
}

.nav-inner {
  max-width: 1140px;
  margin: 0 auto;
  padding: 0 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  font-family: var(--font-head);
  font-size: 1.5rem;
  font-weight: 800;
  letter-spacing: -.02em;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 2.2rem;
}

.nav-links a {
  font-size: .88rem;
  font-weight: 500;
  color: var(--text-2);
  transition: color var(--transition);
  letter-spacing: .01em;
}

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

.nav-cta {
  padding: .5rem 1.3rem;
  border-radius: 50px;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #fff !important;
  font-weight: 600 !important;
}

.burger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}
.burger span {
  display: block;
  width: 24px; height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: var(--transition);
}
.burger.active span:nth-child(1) { transform: rotate(45deg) translate(5px,5px); }
.burger.active span:nth-child(2) { opacity: 0; }
.burger.active span:nth-child(3) { transform: rotate(-45deg) translate(5px,-5px); }

/* ── HERO ───────────────────────────────────────────────── */
#hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

#bgCanvas {
  position: absolute;
  inset: 0;
  width: 100%; height: 100%;
  opacity: .55;
}

.hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
  padding: 7rem 2rem 4rem;
}

.hero-label {
  font-family: var(--font-mono);
  font-size: .78rem;
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--accent-2);
  margin-bottom: 1.6rem;
}

.hero-name {
  font-family: var(--font-head);
  font-size: clamp(4rem, 12vw, 9rem);
  font-weight: 800;
  line-height: .92;
  letter-spacing: -.04em;
  margin-bottom: 1.8rem;
}

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

.hero-tagline {
  font-size: clamp(1rem, 2.2vw, 1.25rem);
  color: var(--text-2);
  font-weight: 300;
  line-height: 1.7;
  max-width: 520px;
  margin: 0 auto 2.5rem;
}

.hero-actions {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
}

.hero-scroll-hint {
  position: absolute;
  bottom: 2.5rem; left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: .5rem;
  z-index: 2;
}

.hero-scroll-hint span {
  font-family: var(--font-mono);
  font-size: .65rem;
  letter-spacing: .15em;
  text-transform: uppercase;
  color: var(--text-3);
}

.scroll-line {
  width: 1px;
  height: 48px;
  background: linear-gradient(to bottom, var(--accent), transparent);
  animation: scrollPulse 1.8s ease-in-out infinite;
}

@keyframes scrollPulse {
  0%,100% { opacity: .4; transform: scaleY(1); }
  50%      { opacity: 1;  transform: scaleY(1.1); }
}

/* ── ANIMATIONS ─────────────────────────────────────────── */
.reveal-up {
  opacity: 0;
  transform: translateY(28px);
  animation: revealUp .7s ease forwards;
}

@keyframes revealUp {
  to { opacity: 1; transform: translateY(0); }
}

[data-animate] {
  opacity: 0;
  transform: translateY(32px);
  transition: opacity .65s ease, transform .65s ease;
}
[data-animate].in-view {
  opacity: 1;
  transform: translateY(0);
}

/* ── SECTIONS SHARED ────────────────────────────────────── */
section { padding: 8rem 0; }

section:nth-child(even) { background: var(--bg-2); }
#hero { background: var(--bg); padding: 0; }
#contact { background: var(--bg-2); }

/* ── ABOUT ──────────────────────────────────────────────── */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1.4fr;
  gap: 5rem;
  align-items: start;
}

.about-lead {
  font-size: 1.15rem;
  color: var(--text);
  font-weight: 400;
  margin-bottom: 1.2rem;
  line-height: 1.7;
}

.about-body {
  color: var(--text-2);
  margin-bottom: 3rem;
  line-height: 1.75;
}

.about-facts {
  display: flex;
  gap: 2.5rem;
  flex-wrap: wrap;
}

.about-facts li {
  display: flex;
  flex-direction: column;
}

.fact-num {
  font-family: var(--font-head);
  font-size: 2.4rem;
  font-weight: 800;
  letter-spacing: -.04em;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1;
  margin-bottom: .3rem;
}

.fact-label {
  font-size: .78rem;
  color: var(--text-3);
  letter-spacing: .04em;
  text-transform: uppercase;
}

/* ── EXPERIENCE ─────────────────────────────────────────── */
.timeline { margin-top: 1rem; }

.tl-item {
  display: grid;
  grid-template-columns: 28px 1fr;
  gap: 0 2.5rem;
  margin-bottom: 3rem;
}

.tl-marker { display: flex; flex-direction: column; align-items: center; }

.tl-dot {
  width: 14px; height: 14px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  box-shadow: 0 0 16px var(--accent-glow);
  flex-shrink: 0;
  margin-top: .3rem;
}

.tl-line {
  width: 1px;
  flex: 1;
  background: linear-gradient(to bottom, var(--border-2), transparent);
  margin-top: .6rem;
}

.tl-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 2rem 2.2rem;
  transition: border-color var(--transition), transform var(--transition);
}

.tl-card:hover {
  border-color: var(--border-2);
  transform: translateX(4px);
}

.tl-meta {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: .8rem;
}

.tl-period {
  font-family: var(--font-mono);
  font-size: .72rem;
  color: var(--text-3);
  letter-spacing: .06em;
}

.tl-badge {
  font-family: var(--font-mono);
  font-size: .65rem;
  letter-spacing: .1em;
  text-transform: uppercase;
  padding: .15rem .6rem;
  border-radius: 50px;
  background: rgba(79,123,255,.15);
  color: var(--accent-2);
  border: 1px solid rgba(0,212,255,.2);
}

.tl-role {
  font-family: var(--font-head);
  font-size: 1.35rem;
  font-weight: 700;
  margin-bottom: .25rem;
}

.tl-company {
  font-size: .88rem;
  color: var(--accent);
  font-weight: 500;
  margin-bottom: 1.2rem;
}

.tl-duties {
  margin-bottom: 1.5rem;
  padding-left: 1rem;
}

.tl-duties li {
  color: var(--text-2);
  font-size: .9rem;
  margin-bottom: .5rem;
  position: relative;
}

.tl-duties li::before {
  content: '—';
  position: absolute;
  left: -1rem;
  color: var(--accent);
  font-size: .8rem;
}

.tl-tags {
  display: flex;
  flex-wrap: wrap;
  gap: .5rem;
}

.tl-tags span {
  font-size: .72rem;
  padding: .2rem .75rem;
  border-radius: 50px;
  background: var(--surface-2);
  color: var(--text-3);
  border: 1px solid var(--border);
  letter-spacing: .03em;
}

/* ── EDUCATION ──────────────────────────────────────────── */
.edu-grid {
  display: grid;
  grid-template-columns: 1fr 1.4fr;
  gap: 2rem;
  align-items: start;
}

.edu-card {
  position: relative;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 2.5rem;
  overflow: hidden;
  transition: border-color var(--transition), transform var(--transition);
}

.edu-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  opacity: 0;
  transition: opacity var(--transition);
}

.edu-card:hover { border-color: var(--border-2); transform: translateY(-4px); }
.edu-card:hover::before { opacity: 1; }

.edu-icon {
  width: 56px; height: 56px;
  border-radius: var(--radius);
  background: var(--surface-2);
  border: 1px solid var(--border);
  display: grid;
  place-items: center;
  color: var(--accent-2);
  margin-bottom: 1.5rem;
}

.edu-badge {
  position: absolute;
  top: 1.5rem; right: 1.5rem;
  font-family: var(--font-mono);
  font-size: .65rem;
  letter-spacing: .12em;
  text-transform: uppercase;
  padding: .2rem .7rem;
  border-radius: 50px;
  background: rgba(0,212,255,.12);
  color: var(--accent-2);
  border: 1px solid rgba(0,212,255,.25);
}

.edu-badge--done {
  background: rgba(79,123,255,.12);
  color: var(--accent);
  border-color: rgba(79,123,255,.25);
}

.edu-period {
  font-family: var(--font-mono);
  font-size: .7rem;
  color: var(--text-3);
  letter-spacing: .06em;
  margin-bottom: .6rem;
}

.edu-degree {
  font-family: var(--font-head);
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: .35rem;
  line-height: 1.25;
}

.edu-school {
  color: var(--accent);
  font-size: .88rem;
  font-weight: 500;
  margin-bottom: 1.5rem;
}

.edu-thesis {
  background: var(--surface-2);
  border-radius: var(--radius);
  padding: 1rem 1.2rem;
  border: 1px solid var(--border);
}

.thesis-label {
  display: block;
  font-family: var(--font-mono);
  font-size: .65rem;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--text-3);
  margin-bottom: .4rem;
}

.thesis-title {
  font-size: .88rem;
  color: var(--text-2);
  font-style: italic;
  line-height: 1.5;
}

/* ── SKILLS ─────────────────────────────────────────────── */
.skills-wrapper {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
}

.skill-group {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 2rem;
  transition: border-color var(--transition);
}

.skill-group:hover { border-color: var(--border-2); }

.skill-group-title {
  font-family: var(--font-head);
  font-size: .9rem;
  font-weight: 700;
  color: var(--text-2);
  letter-spacing: .03em;
  margin-bottom: 1.2rem;
  display: flex;
  align-items: center;
  gap: .5rem;
}

.skill-icon {
  color: var(--accent-2);
  font-size: .8rem;
}

.skill-pills {
  display: flex;
  flex-wrap: wrap;
  gap: .5rem;
}

.skill-pills span {
  font-size: .78rem;
  padding: .3rem .85rem;
  border-radius: 50px;
  background: var(--surface-2);
  color: var(--text-2);
  border: 1px solid var(--border);
  transition: background var(--transition), color var(--transition), border-color var(--transition);
}

.skill-pills span:hover {
  background: rgba(79,123,255,.12);
  color: var(--text);
  border-color: rgba(79,123,255,.3);
}

.lang-pill {
  display: flex !important;
  align-items: center;
  gap: .4rem;
}

.lang-pill em {
  font-style: normal;
  color: var(--accent-2);
  font-size: .7rem;
  font-family: var(--font-mono);
}

/* last skill group full-width if odd */
.skill-group:last-child:nth-child(odd) {
  grid-column: 1 / -1;
}

/* ── CONTACT ─────────────────────────────────────────────── */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.1fr;
  gap: 6rem;
  align-items: center;
}

.contact-title { margin-bottom: 1rem; }

.contact-sub {
  color: var(--text-2);
  font-size: 1rem;
  line-height: 1.7;
  max-width: 380px;
}

.contact-cards {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.contact-card {
  display: flex;
  align-items: center;
  gap: 1.2rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.4rem 1.6rem;
  transition: border-color var(--transition), transform var(--transition), background var(--transition);
}

.contact-card:hover {
  border-color: var(--border-2);
  background: var(--surface-2);
  transform: translateX(4px);
}

.cc-icon {
  width: 44px; height: 44px;
  flex-shrink: 0;
  border-radius: var(--radius);
  background: var(--surface-2);
  border: 1px solid var(--border);
  display: grid;
  place-items: center;
  color: var(--accent-2);
}

.cc-text {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: .15rem;
}

.cc-label {
  font-family: var(--font-mono);
  font-size: .65rem;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--text-3);
}

.cc-value {
  font-size: .95rem;
  color: var(--text);
  font-weight: 400;
}

.cc-arrow {
  color: var(--accent);
  font-size: 1.1rem;
  opacity: 0;
  transition: opacity var(--transition), transform var(--transition);
}

.contact-card:hover .cc-arrow { opacity: 1; transform: translateX(4px); }

.contact-card--info { cursor: default; }
.contact-card--info:hover { transform: none; }

/* ── FOOTER ──────────────────────────────────────────────── */
footer {
  background: var(--bg);
  border-top: 1px solid var(--border);
  padding: 2rem 0;
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}

.footer-logo {
  font-family: var(--font-head);
  font-size: 1.2rem;
  font-weight: 800;
}

.footer-copy {
  font-size: .8rem;
  color: var(--text-3);
}

.back-top {
  width: 38px; height: 38px;
  border-radius: 50%;
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--text-2);
  cursor: pointer;
  font-size: 1rem;
  transition: border-color var(--transition), color var(--transition), transform var(--transition);
  display: grid;
  place-items: center;
}

.back-top:hover {
  border-color: var(--accent);
  color: var(--accent-2);
  transform: translateY(-3px);
}

/* ── RESPONSIVE ──────────────────────────────────────────── */
@media (max-width: 900px) {
  .about-grid,
  .contact-grid {
    grid-template-columns: 1fr;
    gap: 3rem;
  }

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

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

  .skill-group:last-child:nth-child(odd) {
    grid-column: unset;
  }
}

@media (max-width: 720px) {
  .nav-links {
    position: fixed;
    top: 0; right: 0;
    height: 100vh; width: 280px;
    background: var(--bg-3);
    border-left: 1px solid var(--border);
    flex-direction: column;
    align-items: flex-start;
    padding: 6rem 2.5rem 3rem;
    gap: 1.8rem;
    transform: translateX(100%);
    transition: transform .35s cubic-bezier(.4,0,.2,1);
  }

  .nav-links.open { transform: translateX(0); }

  .nav-links a { font-size: 1.1rem; }

  .burger { display: flex; z-index: 101; }

  section { padding: 5rem 0; }

  .hero-name { font-size: clamp(3rem, 14vw, 5rem); }

  .outline-text { -webkit-text-stroke-width: 1.5px; }

  .tl-item { grid-template-columns: 20px 1fr; gap: 0 1.5rem; }

  .about-facts { gap: 1.5rem; }

  .contact-grid { gap: 3rem; }
}

@media (max-width: 480px) {
  .hero-actions { flex-direction: column; align-items: center; }
  .btn { width: 100%; justify-content: center; }
  .footer-inner { flex-direction: column; text-align: center; }
}