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

:root {
  --bg: #07070e;
  --surface: #0d0d1c;
  --surface2: #12122a;
  --border: #1c1c38;
  --accent: #00e5ff;
  --accent-dim: rgba(0,229,255,0.12);
  --accent-glow: rgba(0,229,255,0.35);
  --text: #dde0f0;
  --text-dim: #5a5a7a;
  --text-mid: #9090b0;
  --mono: 'JetBrains Mono', monospace;
  --sans: 'Space Grotesk', sans-serif;
}

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.6;
  overflow-x: hidden;
}

/* Scanline overlay */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background: repeating-linear-gradient(
    0deg,
    transparent,
    transparent 2px,
    rgba(0,0,0,0.03) 2px,
    rgba(0,0,0,0.03) 4px
  );
  pointer-events: none;
  z-index: 9999;
}

/* ──────────────── NAV ──────────────── */
nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 3rem;
  height: 60px;
  background: rgba(7,7,14,0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.nav-logo {
  font-family: var(--mono);
  font-size: 0.85rem;
  color: var(--accent);
  letter-spacing: 0.05em;
  text-decoration: none;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 2rem;
  list-style: none;
}

.nav-links a {
  font-family: var(--mono);
  font-size: 0.75rem;
  color: var(--text-mid);
  text-decoration: none;
  letter-spacing: 0.08em;
  transition: color 0.2s;
}
.nav-links a:hover { color: var(--accent); }

.lang-toggle {
  display: flex;
  gap: 0;
  border: 1px solid var(--border);
  border-radius: 4px;
  overflow: hidden;
}
.lang-btn {
  font-family: var(--mono);
  font-size: 0.7rem;
  padding: 4px 10px;
  background: transparent;
  border: none;
  color: var(--text-dim);
  cursor: pointer;
  transition: all 0.2s;
  letter-spacing: 0.05em;
}
.lang-btn.active {
  background: var(--accent);
  color: #000;
  font-weight: 700;
}

.nav-burger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 36px;
  height: 36px;
  background: transparent;
  border: none;
  cursor: pointer;
  padding: 4px;
  margin-left: auto;
}
.nav-burger span {
  display: block;
  width: 100%;
  height: 1px;
  background: var(--text);
  transition: transform 0.25s, opacity 0.25s;
}
.nav-burger.open span:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.nav-burger.open span:nth-child(2) { opacity: 0; }
.nav-burger.open span:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

/* ──────────────── HERO ──────────────── */
#hero {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 120px 3rem 80px;
  position: relative;
  overflow: hidden;
}

.hero-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--border) 1px, transparent 1px),
    linear-gradient(90deg, var(--border) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse 70% 80% at 20% 50%, black 30%, transparent 100%);
  opacity: 0.5;
}

.hero-glow {
  position: absolute;
  width: 600px; height: 600px;
  left: -200px; top: 50%;
  transform: translateY(-50%);
  background: radial-gradient(circle, rgba(0,229,255,0.06) 0%, transparent 70%);
  pointer-events: none;
}

.hero-content { position: relative; max-width: 900px; }

.hero-tag {
  font-family: var(--mono);
  font-size: 0.75rem;
  color: var(--accent);
  letter-spacing: 0.15em;
  text-transform: uppercase;
  margin-bottom: 1.5rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
}
.hero-tag::before {
  content: '';
  display: block;
  width: 2rem;
  height: 1px;
  background: var(--accent);
}

.hero-name {
  font-size: clamp(3.5rem, 8vw, 7rem);
  font-weight: 700;
  line-height: 0.95;
  letter-spacing: -0.03em;
  margin-bottom: 1.5rem;
}

.hero-name .accent { color: var(--accent); }

.hero-title {
  font-family: var(--mono);
  font-size: clamp(0.9rem, 2vw, 1.1rem);
  color: var(--text-mid);
  margin-bottom: 2.5rem;
  max-width: 560px;
  line-height: 1.7;
}

.hero-ctas { display: flex; gap: 1rem; align-items: center; flex-wrap: wrap; }

.btn-primary {
  font-family: var(--mono);
  font-size: 0.8rem;
  padding: 12px 28px;
  background: var(--accent);
  color: #000;
  border: none;
  cursor: pointer;
  letter-spacing: 0.1em;
  font-weight: 700;
  text-decoration: none;
  transition: box-shadow 0.2s, opacity 0.2s;
  display: inline-block;
}
.btn-primary:hover { box-shadow: 0 0 24px var(--accent-glow); }

.btn-ghost {
  font-family: var(--mono);
  font-size: 0.8rem;
  padding: 11px 28px;
  background: transparent;
  color: var(--accent);
  border: 1px solid var(--accent);
  cursor: pointer;
  letter-spacing: 0.1em;
  text-decoration: none;
  transition: background 0.2s;
  display: inline-block;
}
.btn-ghost:hover { background: var(--accent-dim); }

.hero-stats {
  display: flex;
  gap: 3rem;
  margin-top: 4rem;
  padding-top: 2rem;
  border-top: 1px solid var(--border);
}
.hero-stat-num {
  font-size: 2rem;
  font-weight: 700;
  color: var(--accent);
  font-family: var(--mono);
}
.hero-stat-label {
  font-size: 0.75rem;
  color: var(--text-dim);
  font-family: var(--mono);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-top: 2px;
  white-space: pre-line;
}

/* ──────────────── SECTIONS ──────────────── */
section {
  padding: 100px 3rem;
  max-width: 1200px;
  margin: 0 auto;
}

.section-label {
  font-family: var(--mono);
  font-size: 0.7rem;
  color: var(--accent);
  letter-spacing: 0.2em;
  text-transform: uppercase;
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  position: relative;
}
.section-label::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--border);
  max-width: 120px;
}

.section-header {
  position: relative;
  overflow: hidden;
  margin-bottom: 3rem;
}

.section-header::before {
  content: '';
  position: absolute;
  inset: -10px;
  background-image:
    linear-gradient(var(--border) 1px, transparent 1px),
    linear-gradient(90deg, var(--border) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse 80% 120% at 5% 50%, black 10%, transparent 70%);
  opacity: 0.5;
  pointer-events: none;
}

.section-title {
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.15;
  margin-bottom: 0;
  position: relative;
}

/* ──────────────── ABOUT ──────────────── */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: start;
}

.about-text p {
  color: var(--text-mid);
  margin-bottom: 1.2rem;
  line-height: 1.8;
  font-size: 1rem;
}

.about-text p:first-child { color: var(--text); font-size: 1.05rem; }
.about-text p.highlight { font-weight: 500; }

.info-block {
  display: grid;
  gap: 0;
  border: 1px solid var(--border);
}

.info-row {
  display: grid;
  grid-template-columns: 130px 1fr;
  border-bottom: 1px solid var(--border);
}
.info-row:last-child { border-bottom: none; }

.info-key {
  font-family: var(--mono);
  font-size: 0.7rem;
  color: var(--text-dim);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 14px 16px;
  border-right: 1px solid var(--border);
  background: var(--surface);
  display: flex;
  align-items: center;
}

.info-val {
  font-family: var(--mono);
  font-size: 0.82rem;
  color: var(--text);
  padding: 14px 16px;
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 6px;
}

.tag {
  font-family: var(--mono);
  font-size: 0.68rem;
  padding: 3px 8px;
  background: var(--accent-dim);
  color: var(--accent);
  border: 1px solid rgba(0,229,255,0.2);
  letter-spacing: 0.05em;
}

/* ──────────────── SKILLS ──────────────── */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2px;
}

.skill-group {
  background: var(--surface);
  border: 1px solid var(--border);
  padding: 1.5rem;
}

.skill-group-title {
  font-family: var(--mono);
  font-size: 0.7rem;
  color: var(--accent);
  letter-spacing: 0.15em;
  text-transform: uppercase;
  margin-bottom: 1.2rem;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--border);
}

.skill-item {
  margin-bottom: 0.75rem;
}
.skill-item:last-child { margin-bottom: 0; }

.skill-name {
  font-family: var(--mono);
  font-size: 0.8rem;
  color: var(--text);
}

/* ──────────────── TIMELINE ──────────────── */
.timeline {
  position: relative;
  padding-left: 2rem;
}
.timeline::before {
  content: '';
  position: absolute;
  left: 0; top: 8px; bottom: 0;
  width: 1px;
  background: linear-gradient(to bottom, var(--accent), transparent);
}

.timeline-item {
  position: relative;
  margin-bottom: 3rem;
  padding-left: 2rem;
}
.timeline-item::before {
  content: '';
  position: absolute;
  left: -2rem;
  top: 8px;
  width: 9px; height: 9px;
  border: 1px solid var(--accent);
  background: var(--bg);
  transform: rotate(45deg);
}
.timeline-item.active::before {
  background: var(--accent);
}

.tl-date {
  font-family: var(--mono);
  font-size: 0.7rem;
  color: var(--accent);
  letter-spacing: 0.1em;
  margin-bottom: 0.4rem;
}

.tl-title {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 0.3rem;
}

.tl-sub {
  font-family: var(--mono);
  font-size: 0.75rem;
  color: var(--text-dim);
}

.tl-sub-item {
  display: flex;
  align-items: baseline;
  gap: 6px;
  margin-bottom: 2px;
}
.tl-sub-accent {
  color: var(--accent);
  flex-shrink: 0;
}

/* ──────────────── PROJECTS ──────────────── */
#projects { max-width: 100%; padding: 100px 3rem; }
#projects > * { max-width: 1200px; margin-left: auto; margin-right: auto; }

.projects-list { display: grid; gap: 2px; max-width: 1200px; margin: 0 auto; }

.project-card {
  background: var(--surface);
  border: 1px solid var(--border);
  cursor: pointer;
  transition: border-color 0.2s;
  position: relative;
  overflow: hidden;
}
.project-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: var(--card-accent, var(--accent));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.3s;
}
.project-card:hover::before,
.project-card.open::before { transform: scaleX(1); }
.project-card:hover, .project-card.open {
  border-color: color-mix(in oklch, var(--card-accent, var(--accent)) 50%, var(--border));
}

.project-header {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  padding: 1.8rem 2rem;
  gap: 1rem;
}

.project-meta {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 0.6rem;
  flex-wrap: wrap;
}

.project-num {
  font-family: var(--mono);
  font-size: 0.7rem;
  color: var(--text-dim);
}

.project-engine-tag {
  font-family: var(--mono);
  font-size: 0.65rem;
  padding: 2px 8px;
  background: color-mix(in oklch, var(--card-accent, var(--accent)) 15%, transparent);
  color: var(--card-accent, var(--accent));
  border: 1px solid color-mix(in oklch, var(--card-accent, var(--accent)) 30%, transparent);
}

.project-type-tag {
  font-family: var(--mono);
  font-size: 0.65rem;
  color: var(--text-dim);
}

.project-title-row {
  display: flex;
  align-items: baseline;
  gap: 1.5rem;
}

.project-name {
  font-size: 1.3rem;
  font-weight: 700;
  letter-spacing: -0.01em;
}

.project-short {
  font-size: 0.85rem;
  color: var(--text-mid);
}

.project-toggle {
  font-family: var(--mono);
  font-size: 0.75rem;
  color: var(--text-dim);
  display: flex;
  align-items: center;
  gap: 6px;
  white-space: nowrap;
}
.toggle-icon {
  width: 20px; height: 20px;
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.8rem;
  transition: transform 0.3s, border-color 0.2s;
}
.project-card.open .toggle-icon { transform: rotate(45deg); border-color: var(--card-accent, var(--accent)); }

.project-body {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.5s cubic-bezier(0.16,1,0.3,1);
}
.project-card.open .project-body { max-height: 800px; }

.project-body-inner {
  padding: 0 2rem 2rem;
  display: grid;
  grid-template-columns: 1fr 280px;
  gap: 2rem;
  border-top: 1px solid var(--border);
  padding-top: 2rem;
}

.project-desc {
  color: var(--text-mid);
  line-height: 1.8;
  margin-bottom: 1.5rem;
  font-size: 0.9rem;
}

.project-tech-list {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 1.5rem;
}

/* Tech tags inside a project card inherit the card's accent color */
.project-tech-tag {
  background: color-mix(in oklch, var(--card-accent, var(--accent)) 10%, transparent);
  color: var(--card-accent, var(--accent));
  border-color: color-mix(in oklch, var(--card-accent, var(--accent)) 25%, transparent);
}

.project-links {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.link-btn {
  font-family: var(--mono);
  font-size: 0.72rem;
  padding: 8px 16px;
  border: 1px solid var(--border);
  color: var(--text-mid);
  text-decoration: none;
  letter-spacing: 0.06em;
  transition: border-color 0.2s, color 0.2s;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.link-btn:hover {
  border-color: var(--card-accent, var(--accent));
  color: var(--card-accent, var(--accent));
}

.project-media {
  background: var(--surface2);
  border: 1px solid var(--border);
  aspect-ratio: 16/9;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}

.project-media img,
.project-media video {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.project-media--zoomable { cursor: zoom-in; }

/* ──────────────── LIGHTBOX ──────────────── */
.lightbox {
  position: fixed;
  inset: 0;
  z-index: 1000;
  background: rgba(0, 0, 0, 0.88);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: zoom-out;
}

.lightbox-inner {
  max-width: 85vw;
  max-height: 85vh;
  cursor: default;
  border: 1px solid var(--border);
  box-shadow: 0 0 60px rgba(0, 0, 0, 0.6);
}

.lightbox-inner img,
.lightbox-inner video {
  display: block;
  max-width: 85vw;
  max-height: 85vh;
  object-fit: contain;
}

.media-placeholder { text-align: center; }
.media-placeholder-icon {
  font-size: 2rem;
  margin-bottom: 0.5rem;
  opacity: 0.3;
}
.media-placeholder-text {
  font-family: var(--mono);
  font-size: 0.65rem;
  color: var(--text-dim);
  letter-spacing: 0.1em;
}

/* ──────────────── CONTACT ──────────────── */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: start;
}

.contact-lead {
  font-size: 1.1rem;
  color: var(--text-mid);
  line-height: 1.8;
  margin-bottom: 2rem;
}

.contact-links { display: flex; flex-direction: column; gap: 1px; }

.contact-link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.2rem 1.4rem;
  background: var(--surface);
  border: 1px solid var(--border);
  text-decoration: none;
  transition: border-color 0.2s;
  margin-bottom: 2px;
}
.contact-link:hover { border-color: var(--accent); }

.contact-link-label {
  font-family: var(--mono);
  font-size: 0.7rem;
  color: var(--text-dim);
  letter-spacing: 0.1em;
  text-transform: uppercase;
}
.contact-link-value {
  font-size: 0.9rem;
  color: var(--text);
  margin-top: 2px;
}
.contact-link-arrow {
  font-family: var(--mono);
  font-size: 0.8rem;
  color: var(--accent);
}

.cv-box {
  border: 1px solid var(--border);
  padding: 2rem;
  background: var(--surface);
  position: relative;
  overflow: hidden;
}
.cv-box::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: var(--accent);
}
.cv-box-label {
  font-family: var(--mono);
  font-size: 0.7rem;
  color: var(--accent);
  letter-spacing: 0.15em;
  text-transform: uppercase;
  margin-bottom: 0.75rem;
}
.cv-box-title {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 0.75rem;
}
.cv-box-text {
  font-size: 0.85rem;
  color: var(--text-mid);
  margin-bottom: 1.5rem;
  line-height: 1.7;
}

/* ──────────────── FOOTER ──────────────── */
footer {
  border-top: 1px solid var(--border);
  padding: 2rem 3rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.footer-text {
  font-family: var(--mono);
  font-size: 0.7rem;
  color: var(--text-dim);
  letter-spacing: 0.05em;
}

/* ──────────────── RESPONSIVE ──────────────── */
@media (max-width: 900px) {
  nav { padding: 0 1.5rem; }
  section, #projects { padding: 60px 1.5rem; }
  #hero { padding: 100px 1.5rem 60px; }
  .about-grid, .contact-grid, .skills-grid { grid-template-columns: 1fr; }
  .skills-grid { grid-template-columns: 1fr 1fr; }
  .project-body-inner { grid-template-columns: 1fr; }
  .hero-stats { gap: 2rem; }
}

@media (max-width: 768px) {
  nav {
    flex-wrap: wrap;
    align-content: flex-start;
    padding: 0 1.5rem;
    height: 60px;
    overflow: hidden;
    transition: height 0.3s ease;
  }
  nav.open {
    height: auto;
    padding-bottom: 1rem;
    border-bottom-color: rgba(0,229,255,0.2);
  }
  .nav-burger { display: flex; }
  .nav-logo { order: 1; }
  .nav-burger { order: 2; }
  .nav-links {
    order: 3;
    display: none;
    flex-direction: column;
    width: 100%;
    gap: 0;
    margin-top: 0.75rem;
    border-top: 1px solid var(--border);
    padding-top: 0.5rem;
  }
  nav.open .nav-links { display: flex; }
  .nav-links li { border-bottom: 1px solid var(--border); }
  .nav-links a {
    display: block;
    padding: 0.8rem 0;
    font-size: 0.8rem;
  }
  .lang-toggle {
    order: 4;
    display: none;
    margin-top: 0.75rem;
  }
  nav.open .lang-toggle { display: flex; }
}

@media (max-width: 600px) {
  .skills-grid { grid-template-columns: 1fr; }
  .hero-stats { flex-wrap: wrap; gap: 1.5rem; }
  footer { flex-direction: column; gap: 0.5rem; text-align: center; }
}