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

:root {
  --bg: #0c0c0c;
  --bg3: #171717;

  --surface: #1f1f1f;
  --surface2: #292929;
  --border: rgba(255,255,255,0.05);
  --border2: rgba(255,255,255,0.10);
  --text: #fafaf9;
  --text2: #b0aca1;
  --text3: #78716c;
  --accent: #eab308;
  --accent-dim: rgba(234,179,8,0.12);
  --green: #22c55e;
  --amber: #f59e0b;
  --font-display: 'Syne', sans-serif;
  --font-mono: 'DM Mono', monospace;
}

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-mono);
  font-size: 14px;
  line-height: 1.7;
  overflow-x: hidden;
}

::-webkit-scrollbar { width: 4px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: var(--border2); border-radius: 2px; }

a { text-decoration: none; }

nav {
  position: fixed;
  inset: 0 0 auto;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.25rem 3rem;
  background: rgba(8,11,16,0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.nav-logo {
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 800;
  color: var(--text);
}

.nav-logo span,
.section-label,
.about-text strong,
.exp-role,
.stack-tag {
  color: var(--accent);
}

.nav-links,
.hero-actions,
.hero-stats,
.skill-tags,
.project-stack,
.exp-tags,
.exp-dots,
.exp-arrows,
.footer-right {
  display: flex;
  gap: 1rem;
}

.nav-links {
  gap: 2rem;
  list-style: none;
}

.nav-links a,
.footer-right a {
  color: var(--text2);
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  transition: color 0.2s;
}

.nav-links a:hover,
.footer-right a:hover,
.btn-ghost:hover {
  color: var(--accent);
}

.nav-cta,
.btn-primary,
.form-submit {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  border-radius: 3px;
  cursor: pointer;
}

.nav-cta {
  padding: 0.5rem 1.25rem;
  border: 1px solid var(--accent);
  color: var(--accent);
}

.nav-cta:hover,
.contact-link:hover {
  background: var(--accent-dim);
}

#hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: 6rem 3rem 4rem;
  position: relative;
  overflow: hidden;
}

.hero-grid-bg,
.hero-glow {
  position: absolute;
  pointer-events: none;
}

.hero-grid-bg {
  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 80% 60% at 50% 50%, black 30%, transparent 100%);
  opacity: 0.5;
}

.hero-glow {
  top: 20%;
  left: -10%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(0,212,255,0.04) 0%, transparent 70%);
}

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

.hero-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--accent);
  background: var(--accent-dim);
  border: 1px solid rgba(0,212,255,0.2);
  border-radius: 2px;
  padding: 0.3rem 0.75rem;
  margin-bottom: 1.5rem;
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.hero-tag::before {
  content: '';
  width: 6px;
  height: 6px;
  background: var(--accent);
  border-radius: 50%;
  animation: pulse 2s infinite;
}

@keyframes pulse {
  50% { opacity: 0.3; }
}

.hero-name,
.section-title,
.contact-big,
.stat-num,
.exp-company,
.project-name,
.skill-name {
  font-family: var(--font-display);
}

.hero-name {
  font-size: clamp(3.5rem, 8vw, 7rem);
  font-weight: 800;
  line-height: 0.9;
  letter-spacing: -0.04em;
  margin-bottom: 1.5rem;
}

.hero-name .line2,
.stat-label,
.info-key,
.exp-period,
.project-year,
.project-arrow,
.link-label,
.form-group label,
.footer-left {
  color: var(--text3);
}

.hero-desc,
.section-sub,
.about-text p,
.exp-desc,
.project-desc,
.contact-note {
  color: var(--text2);
  line-height: 1.8;
}

.hero-desc {
  max-width: 480px;
  margin-bottom: 2.5rem;
}

.hero-actions,
.skill-tags,
.project-stack,
.exp-tags {
  flex-wrap: wrap;
}

.btn-primary {
  display: inline-block;
  padding: 0.75rem 2rem;
  background: var(--accent);
  color: #000;
  font-weight: 500;
  transition: opacity 0.2s, transform 0.2s;
}

.btn-primary:hover {
  opacity: 0.85;
  transform: translateY(-1px);
}

.btn-ghost {
  color: var(--text2);
  font-size: 12px;
  letter-spacing: 0.05em;
  transition: color 0.2s;
}

.hero-stats {
  gap: 3rem;
  margin-top: 5rem;
  padding-top: 2rem;
  border-top: 1px solid var(--border);
}

.stat-num {
  display: block;
  font-size: 2rem;
  font-weight: 700;
}

.stat-label {
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

section {
  max-width: 1100px;
  margin: 0 auto;
  padding: 6rem 3rem;
}

#about,
#experience,
#skills,
#projects,
#contact,
footer {
  border-top: 1px solid var(--border);
}

.section-label {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 1rem;
  font-size: 11px;
  letter-spacing: 0.15em;
  text-transform: uppercase;
}

.section-label::before {
  content: '';
  width: 24px;
  height: 1px;
  background: var(--accent);
}

.section-title {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  margin-bottom: 1rem;
}

.section-sub {
  max-width: 500px;
  margin-bottom: 3rem;
  font-size: 13px;
}

.about-grid,
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: start;
}

.about-text p {
  font-size: 14px;
  line-height: 1.9;
  margin-bottom: 1rem;
}

.about-panel,
.skill-card,
.exp-card,
.project-item,
.contact-link {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 4px;
}

.about-panel {
  overflow: hidden;
}

.panel-header {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--border);
  color: var(--text3);
  font-size: 11px;
  letter-spacing: 0.06em;
}

.dot { width: 8px; height: 8px; border-radius: 50%; }
.dot-red { background: #ff5f57; }
.dot-yellow { background: #febc2e; }
.dot-green { background: #28c840; }

.panel-body { padding: 1.25rem; }

.info-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.6rem 0;
  border-bottom: 1px solid var(--border);
  font-size: 12px;
}

.info-row:last-child { border-bottom: none; }
.info-val.green { color: var(--green); }
.info-val.accent { color: var(--accent); }

#experience { overflow: hidden; }

.exp-slider-track {
  display: flex;
  gap: 1.5rem;
  transition: transform 0.5s cubic-bezier(0.4, 0, 0.2, 1);
  will-change: transform;
}

.exp-card {
  flex: 0 0 calc(33.333% - 1rem);
  min-width: 0;
  padding: 1.75rem;
  transition: border-color 0.3s, background 0.3s;
}

.exp-card.active,
.skill-card:hover,
.project-item:hover {
  background: var(--surface2);
  border-color: rgba(0,212,255,0.3);
}

.exp-logo-box {
  width: 100%;
  height: 72px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.25rem;
  background: var(--bg3);
  border-radius: 3px;
}

.exp-logo-box img {
  max-width: 140px;
  max-height: 50px;
  object-fit: contain;
}

.exp-company,
.project-name,
.skill-name {
  font-size: 1.05rem;
  font-weight: 600;
  margin-bottom: 0.25rem;
}

.exp-period,
.exp-role,
.exp-desc,
.project-desc {
  font-size: 12px;
}

.exp-period {
  letter-spacing: 0.06em;
  margin-bottom: 1rem;
}

.exp-desc,
.project-desc {
  margin-bottom: 1rem;
}

.exp-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 2rem;
}

.exp-dot {
  width: 24px;
  height: 3px;
  padding: 0;
  border: none;
  border-radius: 2px;
  background: var(--border2);
  cursor: pointer;
  transition: background 0.3s, width 0.3s;
}

.exp-dot.active {
  width: 40px;
  background: var(--accent);
}

.exp-arrow-btn {
  width: 36px;
  height: 36px;
  display: grid;
  place-items: center;
  background: var(--surface);
  border: 1px solid var(--border2);
  border-radius: 3px;
  color: var(--text2);
  cursor: pointer;
  transition: background 0.2s, border-color 0.2s, color 0.2s;
}

.exp-arrow-btn:hover:not(:disabled) {
  background: var(--surface2);
  border-color: var(--accent);
  color: var(--accent);
}

.exp-arrow-btn:disabled {
  opacity: 0.3;
  cursor: not-allowed;
}

.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1rem;
}

.skill-card {
  padding: 1.25rem;
  transition: border-color 0.2s, background 0.2s;
}

.skill-category {
  margin-bottom: 0.75rem;
  color: var(--accent);
  font-size: 10px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.tag,
.stack-tag {
  border-radius: 2px;
  font-size: 11px;
}

.tag {
  padding: 0.2rem 0.6rem;
  background: var(--bg3);
  border: 1px solid var(--border);
  color: var(--text2);
}

.stack-tag {
  padding: 0.15rem 0.5rem;
  background: var(--accent-dim);
  border: 1px solid rgba(0,212,255,0.2);
  letter-spacing: 0.04em;
}

.skill-bar {
  height: 2px;
  margin-top: 1rem;
  background: var(--border);
  border-radius: 1px;
  overflow: hidden;
}

.skill-fill {
  height: 100%;
  background: var(--accent);
  border-radius: 1px;
}

.projects-list {
  display: flex;
  flex-direction: column;
  gap: 1px;
  border: 1px solid var(--border);
  border-radius: 4px;
  max-height: 550px;
  overflow-y: auto;
  overflow-x: hidden;
  position: relative;
  mask-image: linear-gradient(
    to bottom,
    rgba(0,0,0,1) 0%,
    rgba(0,0,0,1) 78%,
    rgba(0,0,0,0.85) 88%,
    rgba(0,0,0,0.35) 96%,
    transparent 100%
  );
}

.projects-list::-webkit-scrollbar {
  width: 4px;
}

.projects-list::-webkit-scrollbar-thumb {
  background: var(--border2);
  border-radius: 2px;
}

.projects-list::-webkit-scrollbar-track {
  background: transparent;
}

.project-item {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 1rem;
  align-items: start;
  padding: 1.75rem 2rem;
  border-bottom: 1px solid var(--border);
  transition: background 0.2s;
}

.project-item:last-child { border-bottom: none; }

.project-num {
  margin-bottom: 0.5rem;
  color: var(--text3);
  font-size: 11px;
}

.project-meta {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 0.5rem;
  text-align: right;
}

.project-status {
  padding: 0.2rem 0.6rem;
  border-radius: 2px;
  font-size: 10px;
  letter-spacing: 0.06em;
}

.status-live {
  color: var(--green);
  background: rgba(0,229,160,0.1);
  border: 1px solid rgba(0,229,160,0.2);
}

.status-wip {
  color: var(--amber);
  background: rgba(245,166,35,0.1);
  border: 1px solid rgba(245,166,35,0.2);
}

.project-arrow {
  font-size: 18px;
  transition: color 0.2s, transform 0.2s;
}

.project-item:hover .project-arrow {
  color: var(--accent);
  transform: translate(2px, -2px);
}

.contact-big {
  font-size: clamp(2rem, 4vw, 3.5rem);
  font-weight: 800;
  line-height: 0.95;
  letter-spacing: -0.04em;
  margin-bottom: 1.5rem;
}

.contact-big .accent { color: var(--accent); }

.contact-note {
  margin-bottom: 2rem;
  font-size: 13px;
}

.contact-links,
.contact-form {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.contact-link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 1.25rem;
  transition: border-color 0.2s, background 0.2s;
}

.contact-link:hover {
  border-color: var(--accent);
}

.link-label,
.form-group label {
  color: var(--text3);
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.link-val {
  color: var(--text);
  font-size: 13px;
}

.link-icon {
  color: var(--text3);
  font-size: 18px;
  transition: color 0.2s;
}

.contact-link:hover .link-icon { color: var(--accent); }

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 0.75rem 1rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 3px;
  color: var(--text);
  font-family: var(--font-mono);
  font-size: 13px;
  outline: none;
  resize: vertical;
  transition: border-color 0.2s;
}

.form-group input:focus,
.form-group textarea:focus {
  border-color: var(--accent);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
  color: var(--text3);
}

.form-submit {
  align-self: flex-start;
  padding: 0.85rem 2rem;
  background: var(--accent);
  border: none;
  color: #000;
  font-weight: 500;
  transition: opacity 0.2s, background 0.2s;
}

.form-submit:hover { opacity: 0.85; }

.form-submit.sent { background: var(--green); }

.form-success {
  display: none;
  color: var(--green);
  font-size: 12px;
  margin-top: 0.5rem;
}

.form-success.show { display: block; }

footer {
  max-width: 1100px;
  margin: 0 auto;
  padding: 2rem 3rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.footer-left,
.footer-right a {
  color: var(--text3);
  font-size: 12px;
}

.fade-up {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-up.visible {
  opacity: 1;
  transform: translateY(0);
}

@media (max-width: 768px) {
  nav { padding: 1rem 1.5rem; }
  nav .nav-links { display: none; }

  section { padding: 4rem 1.5rem; }
  #hero { padding: 6rem 1.5rem 3rem; }

  .about-grid,
  .contact-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .hero-stats {
    gap: 2rem;
    flex-wrap: wrap;
  }

  .exp-card { flex: 0 0 85%; }

  .project-item {
    grid-template-columns: 1fr;
  }

  .project-meta {
    align-items: flex-start;
    text-align: left;
  }

  footer {
    flex-direction: column;
    gap: 1rem;
    text-align: center;
  }
}

#certifications .skills-grid {
  max-height: 500px;
  overflow-y: auto;
  overflow-x: hidden;
  padding-right: 0.5rem;
  mask-image: linear-gradient(
    to bottom,
    black 0%,
    black 88%,
    transparent 100%
  );
}

#certifications .skills-grid::-webkit-scrollbar {
  width: 4px;
}

#certifications .skills-grid::-webkit-scrollbar-thumb {
  background: var(--border2);
  border-radius: 2px;
}

#certifications .skills-grid::-webkit-scrollbar-track {
  background: transparent;
}

#programs .skills-grid {
  max-height: 500px;
  overflow-y: auto;
  overflow-x: hidden;
  padding-right: 0.5rem;

  mask-image: linear-gradient(
    to bottom,
    black 0%,
    black 88%,
    transparent 100%
  );
}

#programs .skills-grid::-webkit-scrollbar {
  width: 4px;
}

#programs .skills-grid::-webkit-scrollbar-thumb {
  background: var(--border2);
  border-radius: 2px;
}

#programs .skills-grid::-webkit-scrollbar-track {
  background: transparent;
}


.hero-logo-marquee {
  width: 100%;
  max-width: 700px;
  margin-top: 3rem;
  overflow: hidden;
  mask-image: linear-gradient(
    to right,
    transparent,
    black 15%,
    black 85%,
    transparent
  );
}

.logo-marquee-track {
  display: flex;
  align-items: center;
  gap: 3rem;
  width: max-content;
  animation: logoMarquee 18s linear infinite;
}

.logo-marquee-track img {
  height: 52px;
  width: auto;
  object-fit: contain;
  opacity: 0.75;
  filter: grayscale(100%);
}

@keyframes logoMarquee {
  from {
    transform: translateX(0);
  }

  to {
    transform: translateX(-50%);
  }
}

.hero-logo-label {
  margin-top: 3rem;
  margin-bottom: 1rem;
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text3);
}