/* ============================================================
   VARIABLES & THEME
   ============================================================ */
:root {
  --bg: #0a0c10;
  --bg2: #12151c;
  --bg3: #1a1e28;
  --border: rgba(255,255,255,0.07);
  --border2: rgba(255,255,255,0.12);
  --text: #e8eaf0;
  --muted: #7a8099;
  --accent: #4ade80;
  --accent2: #22d3ee;
  --accent-dim: rgba(74,222,128,0.1);
  --accent-dim2: rgba(34,211,238,0.1);
  --mono: 'Fira Code', monospace;
  --sans: 'Nunito', sans-serif;
  --nav-bg: rgba(10,12,16,0.85);
}
body.light {
  --bg: #f5f5f2;
  --bg2: #ffffff;
  --bg3: #eaeae7;
  --border: rgba(0,0,0,0.08);
  --border2: rgba(0,0,0,0.15);
  --text: #1a1c22;
  --muted: #5a6070;
  --accent: #16a34a;
  --accent2: #0891b2;
  --accent-dim: rgba(22,163,74,0.1);
  --accent-dim2: rgba(8,145,178,0.1);
  --nav-bg: rgba(245,245,242,0.88);
}

/* ============================================================
   RESET & BASE
   ============================================================ */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.7;
  overflow-x: hidden;
}

/* ============================================================
   NAV
   ============================================================ */
nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  display: flex; align-items: center; justify-content: space-between;
  padding: 1.25rem 3rem;
  background: var(--nav-bg);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}
.nav-logo {
  font-family: var(--mono);
  font-size: 1rem;
  color: var(--accent);
  text-decoration: none;
  letter-spacing: -0.02em;
}
.nav-links { display: flex; gap: 2rem; list-style: none; }
.nav-links a {
  font-size: 0.8rem;
  font-family: var(--mono);
  color: var(--muted);
  text-decoration: none;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  transition: color 0.2s;
}
.nav-links a:hover { color: var(--accent); }
.theme-toggle {
  background: none; border: 1px solid var(--border2);
  border-radius: 20px; cursor: pointer;
  display: flex; align-items: center; gap: 6px;
  padding: 5px 12px;
  font-family: var(--mono); font-size: 0.72rem;
  color: var(--muted); letter-spacing: 0.04em;
  transition: all 0.2s;
}
.theme-toggle:hover { border-color: var(--accent); color: var(--accent); }
.theme-toggle .t-icon { font-size: 14px; line-height: 1; display: inline-block; transition: transform 0.4s; }
body.light .theme-toggle .t-icon { transform: rotate(180deg); }

/* ============================================================
   HERO
   ============================================================ */
.hero {
  min-height: 100vh;
  display: grid;
  grid-template-columns: 1fr 1fr;
  align-items: center;
  padding: 8rem 3rem 4rem;
  gap: 4rem;
  position: relative;
  overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute;
  top: -200px; right: -200px;
  width: 600px; height: 600px;
  background: radial-gradient(circle, rgba(74,222,128,0.06) 0%, transparent 70%);
  pointer-events: none;
}
.hero::after {
  content: '';
  position: absolute;
  bottom: -100px; left: 30%;
  width: 400px; height: 400px;
  background: radial-gradient(circle, rgba(34,211,238,0.05) 0%, transparent 70%);
  pointer-events: none;
}
.hero-tag {
  font-family: var(--mono);
  font-size: 0.75rem;
  color: var(--accent);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin-bottom: 1.5rem;
  display: flex; align-items: center; gap: 0.75rem;
}
.hero-tag::before {
  content: '';
  display: inline-block;
  width: 32px; height: 1px;
  background: var(--accent);
}
.hero-name {
  font-size: clamp(2.8rem, 5vw, 5rem);
  font-weight: 500;
  line-height: 1.0;
  letter-spacing: -0.01em;
  margin-bottom: 1rem;
}
.hero-name span { color: var(--accent); }
.hero-role {
  font-family: var(--mono);
  font-size: 1rem;
  color: var(--muted);
  margin-bottom: 2rem;
}
.hero-desc {
  font-size: 1rem;
  color: var(--muted);
  max-width: 480px;
  margin-bottom: 2.5rem;
  line-height: 1.8;
}
.hero-ctas { display: flex; gap: 1rem; flex-wrap: wrap; }

/* ============================================================
   BUTTONS
   ============================================================ */
.btn {
  display: inline-flex; align-items: center; gap: 0.5rem;
  padding: 0.75rem 1.75rem;
  font-family: var(--mono);
  font-size: 0.8rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  text-decoration: none;
  border-radius: 4px;
  transition: all 0.2s;
  cursor: pointer;
  border: none;
}
.btn-primary {
  background: var(--accent);
  color: #0a0c10;
  font-weight: 700;
}
.btn-primary:hover { background: #6ee7a0; transform: translateY(-2px); }
.btn-outline {
  background: transparent;
  color: var(--text);
  border: 1px solid var(--border2);
}
.btn-outline:hover { border-color: var(--accent); color: var(--accent); transform: translateY(-2px); }

/* ============================================================
   TERMINAL (hero visual)
   ============================================================ */
.hero-visual {
  display: flex; align-items: center; justify-content: center;
  position: relative;
}
.terminal {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: 12px;
  width: 100%;
  max-width: 460px;
  overflow: hidden;
  font-family: var(--mono);
}
.terminal-bar {
  background: var(--bg3);
  padding: 0.75rem 1rem;
  display: flex; align-items: center; gap: 0.5rem;
  border-bottom: 1px solid var(--border);
}
.dot { width: 10px; height: 10px; border-radius: 50%; }
.dot-r { background: #ff5f57; }
.dot-y { background: #febc2e; }
.dot-g { background: #28c840; }
.terminal-title {
  font-size: 0.7rem;
  color: var(--muted);
  margin-left: auto;
  letter-spacing: 0.04em;
}
.terminal-body { padding: 1.5rem; font-size: 0.8rem; line-height: 2; }
.t-prompt { color: var(--accent); }
.t-cmd { color: var(--text); }
.t-key { color: var(--accent2); }
.t-val { color: #c4b5fd; }
.t-muted { color: var(--muted); }
.t-line { display: block; }
.cursor {
  display: inline-block;
  width: 8px; height: 1em;
  background: var(--accent);
  vertical-align: text-bottom;
  animation: blink 1s step-end infinite;
  margin-left: 2px;
}
@keyframes blink { 50% { opacity: 0; } }

/* ============================================================
   HERO STATS
   ============================================================ */
.hero-stats {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 1rem;
  margin-top: 2rem;
}
.stat {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1rem;
  text-align: center;
}
.stat-num {
  font-size: 1.75rem; font-weight: 500;
  color: var(--accent);
  line-height: 1;
  display: block;
}
.stat-label {
  font-size: 0.7rem;
  font-family: var(--mono);
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-top: 0.25rem;
  display: block;
}

/* ============================================================
   SECTIONS (shared)
   ============================================================ */
section { padding: 6rem 3rem; }
.section-inner { max-width: 1100px; margin: 0 auto; }
.section-label {
  font-family: var(--mono);
  font-size: 0.72rem;
  color: var(--accent);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin-bottom: 1rem;
  display: flex; align-items: center; gap: 0.75rem;
}
.section-label::before {
  content: '';
  display: inline-block; width: 24px; height: 1px;
  background: var(--accent);
}
.section-title {
  font-size: clamp(2rem, 4vw, 3.2rem);
  font-weight: 500;
  letter-spacing: -0.01em;
  line-height: 1.1;
  margin-bottom: 3rem;
}
.divider {
  width: 100%; height: 1px;
  background: var(--border);
  margin: 0;
}

/* ============================================================
   SKILLS
   ============================================================ */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.5rem;
}
.skill-card {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.5rem;
  transition: border-color 0.2s, transform 0.2s;
}
.skill-card:hover { border-color: var(--border2); transform: translateY(-2px); }
.skill-card-title {
  font-size: 0.75rem;
  font-family: var(--mono);
  color: var(--accent2);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 1rem;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--border);
}
.skill-tags { display: flex; flex-wrap: wrap; gap: 0.4rem; }
.tag {
  font-family: var(--mono);
  font-size: 0.72rem;
  padding: 0.25rem 0.6rem;
  border-radius: 4px;
  background: rgba(255,255,255,0.05);
  color: var(--muted);
  border: 1px solid var(--border);
  transition: all 0.2s;
}
.tag:hover { border-color: var(--accent); color: var(--accent); background: var(--accent-dim); }

/* ============================================================
   EXPERIENCE
   ============================================================ */
.timeline { position: relative; padding-left: 2rem; }
.timeline::before {
  content: '';
  position: absolute; left: 0; top: 8px; bottom: 0;
  width: 1px; background: var(--border);
}
.exp-item {
  position: relative;
  margin-bottom: 3.5rem;
  padding-left: 2rem;
}
.exp-item::before {
  content: '';
  position: absolute; left: -2rem; top: 8px;
  width: 9px; height: 9px;
  border-radius: 50%;
  background: var(--bg);
  border: 1.5px solid var(--accent);
  transform: translateX(-4px);
}
.exp-item.current::before { background: var(--accent); }
.exp-header { margin-bottom: 0.75rem; }
.exp-role {
  font-size: 1.15rem;
  font-weight: 500;
  color: var(--text);
  margin-bottom: 0.2rem;
}
.exp-meta {
  display: flex; gap: 1.5rem; flex-wrap: wrap;
  font-family: var(--mono);
  font-size: 0.75rem;
  color: var(--muted);
}
.exp-company { color: var(--accent); font-weight: 500; }
.exp-period {
  background: var(--bg3);
  padding: 0.15rem 0.6rem;
  border-radius: 4px;
  border: 1px solid var(--border);
}
.exp-current-badge {
  background: var(--accent-dim);
  color: var(--accent);
  border: 1px solid rgba(74,222,128,0.2);
  padding: 0.15rem 0.6rem;
  border-radius: 4px;
}
.exp-desc {
  color: var(--muted);
  font-size: 0.95rem;
  margin-top: 0.75rem;
  line-height: 1.75;
}
.exp-stack {
  display: flex; flex-wrap: wrap; gap: 0.4rem;
  margin-top: 1rem;
}
.stack-tag {
  font-family: var(--mono);
  font-size: 0.7rem;
  padding: 0.2rem 0.55rem;
  background: var(--accent-dim2);
  color: var(--accent2);
  border-radius: 4px;
  border: 1px solid rgba(34,211,238,0.15);
}

/* ============================================================
   PROJECTS
   ============================================================ */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(480px, 1fr));
  gap: 1.5rem;
}
.project-card {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.75rem;
  transition: border-color 0.2s, transform 0.2s;
}
.project-card:hover { border-color: var(--border2); transform: translateY(-2px); }
.project-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1rem;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--border);
}
.project-name {
  font-family: var(--mono);
  font-size: 1rem;
  font-weight: 500;
  color: var(--accent);
}
.project-role {
  font-family: var(--mono);
  font-size: 0.7rem;
  color: var(--accent2);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  background: var(--accent-dim2);
  border: 1px solid rgba(34,211,238,0.15);
  padding: 0.2rem 0.6rem;
  border-radius: 4px;
}
.project-desc {
  color: var(--muted);
  font-size: 0.95rem;
  line-height: 1.75;
  margin-bottom: 1rem;
}

/* ============================================================
   CERTIFICATIONS
   ============================================================ */
.certs-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1rem;
}
.cert-card {
  display: flex; align-items: center; gap: 1rem;
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 1.1rem 1.25rem;
  transition: border-color 0.2s;
}
.cert-card:hover { border-color: var(--accent); }
.cert-icon {
  width: 36px; height: 36px;
  border-radius: 8px;
  background: var(--accent-dim);
  border: 1px solid rgba(74,222,128,0.2);
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
  font-size: 1rem;
}
.cert-name {
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text);
  line-height: 1.3;
}
.cert-body {
  font-family: var(--mono);
  font-size: 0.7rem;
  color: var(--muted);
  margin-top: 0.2rem;
}

/* ============================================================
   CONTACT
   ============================================================ */
.contact-grid {
  display: grid; grid-template-columns: 1fr 1fr; gap: 4rem; align-items: start;
}
.contact-left p { color: var(--muted); font-size: 1rem; line-height: 1.8; margin-bottom: 2rem; }
.contact-links { display: flex; flex-direction: column; gap: 0.75rem; }
.contact-link {
  display: flex; align-items: center; gap: 0.75rem;
  font-family: var(--mono);
  font-size: 0.85rem;
  color: var(--muted);
  text-decoration: none;
  transition: color 0.2s;
}
.contact-link:hover { color: var(--accent); }
.contact-link-icon {
  width: 32px; height: 32px;
  border-radius: 6px;
  background: var(--bg3);
  border: 1px solid var(--border);
  display: flex; align-items: center; justify-content: center;
  font-size: 0.85rem;
}
.contact-right {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 2rem;
}
.form-group { margin-bottom: 1.25rem; }
.form-label {
  display: block;
  font-family: var(--mono);
  font-size: 0.72rem;
  color: var(--muted);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 0.5rem;
}
.form-input, .form-textarea {
  width: 100%;
  background: var(--bg3);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 0.75rem 1rem;
  font-family: var(--sans);
  font-size: 0.9rem;
  color: var(--text);
  outline: none;
  transition: border-color 0.2s;
  resize: vertical;
}
.form-input:focus, .form-textarea:focus { border-color: var(--accent); }
.form-textarea { min-height: 120px; }

/* ============================================================
   FOOTER
   ============================================================ */
footer {
  padding: 2rem 3rem;
  border-top: 1px solid var(--border);
  display: flex; justify-content: space-between; align-items: center;
  flex-wrap: wrap; gap: 1rem;
}
footer p {
  font-family: var(--mono);
  font-size: 0.75rem;
  color: var(--muted);
}
footer a { color: var(--accent); text-decoration: none; }

/* ============================================================
   SCROLL REVEAL
   ============================================================ */
.reveal { opacity: 0; transform: translateY(24px); transition: opacity 0.6s ease, transform 0.6s ease; }
.reveal.visible { opacity: 1; transform: none; }

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 860px) {
  nav { padding: 1rem 1.5rem; }
  .nav-links { display: none; }
  .hero { grid-template-columns: 1fr; padding: 7rem 1.5rem 3rem; }
  .hero-visual { display: none; }
  .hero-stats { grid-template-columns: repeat(3, 1fr); }
  section { padding: 4rem 1.5rem; }
  .projects-grid { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; gap: 2rem; }
  footer { padding: 2rem 1.5rem; }
}