/* ---------- Tokens ---------- */
:root{
  --bg: #090c12;
  --bg-alt: #0d121b;
  --surface: #131a27;
  --surface-2: #182234;
  --border: #232c3d;
  --border-strong: #2e3a52;
  --text: #e7ecf3;
  --text-muted: #94a3b8;
  --text-dim: #64748b;
  --accent: #4fd1c5;
  --accent-2: #7dd3fc;
  --accent-3: #a78bfa;
  --accent-rgb: 79, 209, 197;
  --ok: #34d399;
  --radius: 12px;
  --radius-lg: 20px;
  --max-width: 1120px;
  --font-mono: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

*, *::before, *::after{ box-sizing: border-box; }
html{ scroll-behavior: smooth; }
body{
  margin: 0;
  background:
    radial-gradient(circle at 12% 8%, rgba(79, 209, 197, 0.07), transparent 40%),
    radial-gradient(circle at 88% 4%, rgba(125, 211, 252, 0.06), transparent 38%),
    var(--bg);
  background-attachment: fixed;
  color: var(--text);
  font-family: var(--font-sans);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  position: relative;
}
body::before{
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  background-image:
    linear-gradient(rgba(148, 163, 184, 0.055) 1px, transparent 1px),
    linear-gradient(90deg, rgba(148, 163, 184, 0.055) 1px, transparent 1px);
  background-size: 44px 44px;
  mask-image: radial-gradient(circle at 50% 0%, #000 0%, transparent 75%);
  -webkit-mask-image: radial-gradient(circle at 50% 0%, #000 0%, transparent 75%);
}
img{ max-width: 100%; display: block; }
a{ color: inherit; text-decoration: none; }
ul, ol{ list-style: none; margin: 0; padding: 0; }

.container{
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

.icon{
  width: 1em;
  height: 1em;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.8;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.gradient-text{
  background: linear-gradient(100deg, var(--accent) 10%, var(--accent-2) 55%, var(--accent-3) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

/* ---------- Scroll reveal ---------- */
.reveal{
  opacity: 0;
  transform: translateY(22px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.reveal.in-view{ opacity: 1; transform: translateY(0); }

@keyframes pulseGlow{
  0%, 100%{ box-shadow: 0 0 0 0 rgba(var(--accent-rgb), 0.45); }
  50%{ box-shadow: 0 0 0 6px rgba(var(--accent-rgb), 0); }
}
@keyframes blink{
  0%, 100%{ opacity: 1; }
  50%{ opacity: 0; }
}
@keyframes floatY{
  0%, 100%{ transform: translateY(0); }
  50%{ transform: translateY(-8px); }
}

/* ---------- Header ---------- */
.site-header{
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(9, 12, 18, 0.78);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}
.header-inner{
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
}
.logo{
  display: inline-flex;
  align-items: center;
  gap: 2px;
  font-family: var(--font-mono);
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--accent);
  letter-spacing: 0.5px;
}
.logo span{ color: var(--text); }

.nav{
  display: flex;
  align-items: center;
  gap: 32px;
}
.nav a{
  font-size: 0.95rem;
  color: var(--text-muted);
  transition: color 0.2s ease;
}
.nav a:hover{ color: var(--accent); }

.header-actions{
  display: flex;
  align-items: center;
  gap: 12px;
}

.nav-cta{
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 18px;
  border-radius: 999px;
  border: 1px solid var(--border-strong);
  color: var(--text) !important;
  font-weight: 600;
  transition: border-color 0.2s ease, color 0.2s ease, background 0.2s ease;
}
.nav-cta:hover{ border-color: var(--accent); color: var(--accent) !important; background: rgba(var(--accent-rgb), 0.08); }

.lang-switch{
  font-family: var(--font-mono);
  font-size: 0.82rem;
  padding: 6px 13px;
  border-radius: 999px;
  border: 1px solid var(--border);
  color: var(--text-muted) !important;
  transition: border-color 0.2s ease, color 0.2s ease;
}
.lang-switch:hover{ border-color: var(--accent); color: var(--accent) !important; }

.nav-toggle{
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  background: none;
  border: none;
  cursor: pointer;
}
.nav-toggle span{
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text);
  transition: transform 0.25s ease, opacity 0.25s ease;
}
.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); }

/* ---------- Hero ---------- */
.hero{
  padding: 88px 0 64px;
  overflow: hidden;
}
.hero-inner{
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 56px;
  align-items: center;
}
.hero-eyebrow{
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  color: var(--accent);
  font-size: 0.92rem;
  margin: 0 0 16px;
  min-height: 1.3em;
}
.hero-eyebrow .dot{
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--ok);
  box-shadow: 0 0 0 0 rgba(52, 211, 153, 0.5);
  animation: pulseGlow 2.2s infinite;
  flex-shrink: 0;
}
.typed-cursor{
  display: inline-block;
  width: 8px;
  margin-left: 2px;
  color: var(--accent-2);
  animation: blink 1s step-start infinite;
}
.hero h1{
  font-size: clamp(2.3rem, 5vw, 3.6rem);
  margin: 0 0 20px;
  letter-spacing: -0.02em;
}
.hero-lead{
  max-width: 620px;
  color: var(--text-muted);
  font-size: 1.1rem;
  margin: 0 0 28px;
}
.badge-row{
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 0 0 32px;
}
.badge{
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 7px 14px;
  border-radius: 999px;
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--text-muted);
  font-size: 0.82rem;
  font-weight: 500;
}
.badge .icon{ color: var(--accent); width: 14px; height: 14px; }

.hero-actions{
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.btn{
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 13px 28px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 0.95rem;
  transition: transform 0.15s ease, background 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
  cursor: pointer;
  border: 1px solid transparent;
}
.btn-primary{
  background: linear-gradient(100deg, var(--accent), var(--accent-2));
  color: #06251f;
  box-shadow: 0 8px 24px -8px rgba(var(--accent-rgb), 0.55);
}
.btn-primary:hover{ transform: translateY(-2px); box-shadow: 0 12px 28px -8px rgba(var(--accent-rgb), 0.65); }
.btn-ghost{
  border: 1px solid var(--border-strong);
  color: var(--text);
}
.btn-ghost:hover{ border-color: var(--accent); color: var(--accent); transform: translateY(-2px); }

/* ---------- Terminal card ---------- */
.terminal{
  background: linear-gradient(180deg, var(--surface), var(--surface-2));
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: 0 24px 60px -24px rgba(0, 0, 0, 0.6), 0 0 0 1px rgba(255,255,255,0.02) inset;
  animation: floatY 6s ease-in-out infinite;
}
.terminal-bar{
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 14px 16px;
  background: rgba(255, 255, 255, 0.02);
  border-bottom: 1px solid var(--border);
}
.terminal-bar .dot{ width: 11px; height: 11px; border-radius: 50%; }
.terminal-bar .dot.red{ background: #ff5f56; }
.terminal-bar .dot.yellow{ background: #ffbd2e; }
.terminal-bar .dot.green{ background: #27c93f; }
.terminal-bar .terminal-title{
  margin: 0 auto;
  transform: translateX(-16px);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--text-dim);
}
.terminal-body{
  padding: 22px 24px 26px;
  font-family: var(--font-mono);
  font-size: 0.88rem;
  line-height: 1.9;
}
.terminal-body .prompt{ color: var(--accent-2); }
.terminal-body .cmd{ color: var(--text); }
.terminal-body .out{ color: var(--text-muted); }
.terminal-body .key{ color: var(--accent-3); }
.terminal-body .val{ color: var(--accent); }
.terminal-body .ok-line{ color: var(--ok); }
.terminal-body .divider{ color: var(--border-strong); }

/* ---------- Stats ---------- */
.stats{
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  background: var(--bg-alt);
}
.stats-grid{
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  padding: 40px 24px;
}
.stat{ text-align: center; }
.stat-number{
  display: block;
  font-family: var(--font-mono);
  font-size: 2rem;
  font-weight: 700;
  color: var(--accent);
}
.stat-label{
  color: var(--text-muted);
  font-size: 0.85rem;
}

/* ---------- Sections ---------- */
.section{ padding: 96px 0; }
.section-alt{ background: var(--bg-alt); }
.section-eyebrow{
  font-family: var(--font-mono);
  color: var(--accent);
  font-size: 0.82rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  margin: 0 0 10px;
}
.section-title{
  font-size: clamp(1.6rem, 3vw, 2.1rem);
  margin: 0 0 16px;
  letter-spacing: -0.01em;
}
.section-lead{
  color: var(--text-muted);
  max-width: 640px;
  margin: 0 0 44px;
  font-size: 1.02rem;
}

.about-grid{
  display: grid;
  grid-template-columns: 1.3fr 1fr;
  gap: 48px;
  align-items: start;
}
.about-text{
  color: var(--text-muted);
  font-size: 1.05rem;
}
.about-highlights{
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.highlight-item{
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 16px 18px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}
.highlight-item .icon{
  color: var(--accent);
  width: 20px;
  height: 20px;
  flex-shrink: 0;
  margin-top: 2px;
}
.highlight-item strong{ display: block; font-size: 0.95rem; }
.highlight-item span{ color: var(--text-muted); font-size: 0.86rem; }

/* ---------- Competency cards ---------- */
.competency-grid{
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 20px;
}
.competency-card{
  position: relative;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px;
  transition: border-color 0.25s ease, transform 0.25s ease, background 0.25s ease;
  overflow: hidden;
}
.competency-card::before{
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(180px circle at 20% 0%, rgba(var(--accent-rgb), 0.10), transparent 60%);
  opacity: 0;
  transition: opacity 0.3s ease;
}
.competency-card:hover{ border-color: var(--border-strong); transform: translateY(-4px); }
.competency-card:hover::before{ opacity: 1; }
.competency-icon{
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  border-radius: 14px;
  background: linear-gradient(135deg, rgba(var(--accent-rgb), 0.18), rgba(125, 211, 252, 0.10));
  color: var(--accent);
  margin-bottom: 18px;
  position: relative;
}
.competency-icon .icon{ width: 24px; height: 24px; }
.competency-card h3{
  margin: 0 0 10px;
  font-size: 1.08rem;
  position: relative;
}
.competency-card p{
  margin: 0;
  color: var(--text-muted);
  font-size: 0.92rem;
  line-height: 1.65;
  position: relative;
}

/* ---------- Skills ---------- */
.skills-grid{
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 20px;
}
.skill-card{
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  transition: border-color 0.2s ease, transform 0.2s ease;
}
.skill-card:hover{ border-color: var(--border-strong); transform: translateY(-3px); }
.skill-card-head{
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 16px;
}
.skill-card-head .icon-wrap{
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: 9px;
  background: rgba(var(--accent-rgb), 0.12);
  color: var(--accent);
  flex-shrink: 0;
}
.skill-card-head .icon-wrap .icon{ width: 17px; height: 17px; }
.skill-card h3{
  margin: 0;
  font-size: 0.98rem;
  color: var(--text);
}
.tag-list{
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.tag-list li{
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.82rem;
  padding: 5px 12px 5px 10px;
  border-radius: 999px;
  background: rgba(var(--accent-rgb), 0.06);
  border: 1px solid var(--border);
  color: var(--text-muted);
  transition: border-color 0.2s ease, color 0.2s ease;
}
.tag-list li::before{
  content: "";
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--accent-2);
  flex-shrink: 0;
}
.tag-list li:hover{ border-color: var(--accent); color: var(--text); }

/* ---------- Timeline ---------- */
.timeline{
  position: relative;
  padding-left: 32px;
  border-left: 2px solid var(--border);
}
.timeline-item{
  position: relative;
  padding-bottom: 38px;
}
.timeline-item:last-child{ padding-bottom: 0; }
.timeline-marker{
  position: absolute;
  left: -38px;
  top: 4px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 4px rgba(var(--accent-rgb), 0.15);
}
.timeline-item.is-current .timeline-marker{
  background: var(--ok);
  animation: pulseGlow 2.2s infinite;
}
.timeline-period{
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--accent);
  display: inline-flex;
  align-items: center;
  gap: 10px;
}
.current-tag{
  display: inline-flex;
  align-items: center;
  padding: 2px 10px;
  border-radius: 999px;
  background: rgba(52, 211, 153, 0.12);
  border: 1px solid rgba(52, 211, 153, 0.35);
  color: var(--ok);
  font-family: var(--font-sans);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.02em;
}
.timeline-content h3{
  margin: 8px 0 4px;
  font-size: 1.08rem;
}
.timeline-content p{
  margin: 0;
  color: var(--text-muted);
  font-size: 0.95rem;
}

/* ---------- CTA banner ---------- */
.cta-banner{
  position: relative;
  background: linear-gradient(120deg, rgba(var(--accent-rgb), 0.12), rgba(125, 211, 252, 0.08));
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-lg);
  padding: 48px 40px;
  text-align: center;
  overflow: hidden;
}
.cta-banner h2{
  margin: 0 0 12px;
  font-size: clamp(1.5rem, 3vw, 2rem);
}
.cta-banner p{
  margin: 0 0 28px;
  color: var(--text-muted);
  max-width: 560px;
  margin-left: auto;
  margin-right: auto;
}
.cta-actions{
  display: flex;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}

/* ---------- Contact ---------- */
.contact-lead{
  color: var(--text-muted);
  margin: -20px 0 36px;
  max-width: 560px;
}
.contact-grid{
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 20px;
}
.contact-card{
  display: flex;
  flex-direction: column;
  gap: 6px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px;
  transition: border-color 0.2s ease, transform 0.15s ease;
}
a.contact-card:hover{
  border-color: var(--accent);
  transform: translateY(-3px);
}
.contact-icon{
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 30px;
  height: 30px;
  color: var(--accent);
  font-size: 1.1rem;
}
.contact-icon .icon{ width: 18px; height: 18px; }
.contact-label{
  color: var(--text-muted);
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.contact-value{
  font-weight: 600;
}

/* ---------- Footer ---------- */
.site-footer{
  border-top: 1px solid var(--border);
  padding: 28px 0;
}
.footer-inner{
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: var(--text-muted);
  font-size: 0.85rem;
}
.footer-inner a:hover{ color: var(--accent); }

/* ---------- Back to top ---------- */
.to-top{
  position: fixed;
  right: 24px;
  bottom: 24px;
  z-index: 90;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 46px;
  height: 46px;
  padding: 0;
  border-radius: 50%;
  background: rgba(19, 26, 39, 0.85);
  border: 1px solid var(--border-strong);
  color: var(--text);
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transform: translateY(12px);
  backdrop-filter: blur(8px);
  box-shadow: 0 10px 28px -10px rgba(0, 0, 0, 0.7);
  transition: opacity 0.25s ease, transform 0.25s ease, visibility 0.25s ease,
              border-color 0.2s ease, color 0.2s ease, background 0.2s ease;
}
.to-top.visible{ opacity: 1; visibility: visible; transform: translateY(0); }
.to-top:hover{
  border-color: var(--accent);
  color: var(--accent);
  background: rgba(var(--accent-rgb), 0.12);
}
.to-top .icon{ width: 20px; height: 20px; }

@media (max-width: 480px){
  .to-top{ right: 16px; bottom: 16px; width: 42px; height: 42px; }
}

/* ---------- Responsive ---------- */
@media (max-width: 900px){
  .hero-inner{ grid-template-columns: 1fr; }
  .terminal{ max-width: 520px; }
  .about-grid{ grid-template-columns: 1fr; }
}

@media (max-width: 760px){
  .nav{
    position: absolute;
    top: 68px;
    left: 0;
    right: 0;
    background: var(--bg);
    border-bottom: 1px solid var(--border);
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.25s ease;
  }
  .nav.open{ max-height: 320px; }
  .nav a{
    padding: 16px 24px;
    border-top: 1px solid var(--border);
  }
  .nav-cta{ border-radius: 0; border-left: none; border-right: none; }
  .lang-switch{ padding: 6px 11px; }
  .nav-toggle{ display: flex; }
  .stats-grid{ grid-template-columns: repeat(2, 1fr); }
  .cta-banner{ padding: 36px 24px; }
}

@media (max-width: 480px){
  .hero{ padding: 72px 0 56px; }
  .section{ padding: 64px 0; }
}