:root {
  --bg: #0a0e14;
  --bg2: #0f141c;
  --bg3: #141b26;
  --accent: #00d4aa;
  --accent2: #0088ff;
  --accent3: #ff6b35;
  --text: #e8edf5;
  --text2: #8a95a8;
  --text3: #4a5568;
  --border: #1e2a3a;
  --card: #111827;
  --mono: 'Space Mono', monospace;
  --sans: 'Sora', sans-serif;
}

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

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  font-size: 15px;
  line-height: 1.7;
  overflow-x: hidden;
}

/* grid background */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(rgba(0,212,170,0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0,212,170,0.03) 1px, transparent 1px);
  background-size: 40px 40px;
  pointer-events: none;
  z-index: 0;
}

/* ── NAV ── */
nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  background: rgba(10,14,20,0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  padding: 0 5%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 60px;
}

.logo {
  font-family: var(--mono);
  font-size: 14px;
  color: var(--accent);
  letter-spacing: 0.05em;
}
.logo span { color: var(--text2); }

.nav-links { display: flex; gap: 28px; }
.nav-links a {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--text2);
  text-decoration: none;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  transition: color 0.2s;
}
.nav-links a:hover { color: var(--accent); }

.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 4px;
}
.hamburger span {
  display: block;
  width: 22px; height: 2px;
  background: var(--accent);
  transition: all 0.3s;
}

.mobile-menu {
  display: none;
  position: fixed;
  top: 60px; left: 0; right: 0;
  background: rgba(10,14,20,0.97);
  border-bottom: 1px solid var(--border);
  padding: 20px 5%;
  z-index: 99;
  flex-direction: column;
  gap: 16px;
}
.mobile-menu.open { display: flex; }
.mobile-menu a {
  font-family: var(--mono);
  font-size: 13px;
  color: var(--text2);
  text-decoration: none;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 8px 0;
  border-bottom: 1px solid var(--border);
  transition: color 0.2s;
}
.mobile-menu a:hover { color: var(--accent); }

/* ── SECTIONS ── */
section {
  position: relative;
  z-index: 1;
  padding: 100px 8% 80px;
  max-width: 1100px;
  margin: 0 auto;
}

section:first-of-type { padding-top: 0; }

.section-label {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--accent);
  letter-spacing: 0.2em;
  text-transform: uppercase;
  margin-bottom: 12px;
}

h2 {
  font-family: var(--sans);
  font-size: clamp(28px, 4vw, 42px);
  font-weight: 700;
  color: var(--text);
  margin-bottom: 40px;
  line-height: 1.2;
}

h2 .accent { color: var(--accent); }

/* ── HERO ── */
#home {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: 60px;
  max-width: 1100px;
}

.hero-inner {
  width: 100%;
  padding: 0 8%;
}

.hero-tag {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--accent);
  letter-spacing: 0.2em;
  text-transform: uppercase;
  margin-bottom: 20px;
  display: flex;
  align-items: center;
  gap: 10px;
}
.hero-tag::before {
  content: '';
  display: block;
  width: 30px; height: 1px;
  background: var(--accent);
}

.hero-name {
  font-family: var(--sans);
  font-size: clamp(42px, 7vw, 88px);
  font-weight: 700;
  line-height: 1.0;
  color: var(--text);
  margin-bottom: 16px;
}
.hero-name .line2 {
  color: transparent;
  -webkit-text-stroke: 1px var(--accent);
}

.hero-role {
  font-family: var(--mono);
  font-size: clamp(14px, 2vw, 18px);
  color: var(--text2);
  margin-bottom: 28px;
}
.hero-role .highlight { color: var(--accent2); }

.hero-desc {
  max-width: 560px;
  color: var(--text2);
  font-size: 15px;
  line-height: 1.8;
  margin-bottom: 40px;
}

.hero-opt-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(0,212,170,0.08);
  border: 1px solid rgba(0,212,170,0.3);
  border-radius: 4px;
  padding: 6px 14px;
  font-family: var(--mono);
  font-size: 12px;
  color: var(--accent);
  margin-bottom: 40px;
  letter-spacing: 0.05em;
}
.hero-opt-badge .dot {
  width: 7px; height: 7px;
  border-radius: 50%;
  background: var(--accent);
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.4; transform: scale(0.8); }
}

.hero-buttons {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 48px;
}

.btn-primary {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  background: var(--accent);
  color: var(--bg);
  border: none;
  padding: 12px 28px;
  cursor: pointer;
  text-decoration: none;
  display: inline-block;
  font-weight: 700;
  transition: all 0.2s;
  clip-path: polygon(0 0, calc(100% - 10px) 0, 100% 10px, 100% 100%, 10px 100%, 0 calc(100% - 10px));
}
.btn-primary:hover { background: #00f0c0; transform: translateY(-2px); }

.btn-secondary {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  background: transparent;
  color: var(--accent);
  border: 1px solid var(--accent);
  padding: 12px 28px;
  cursor: pointer;
  text-decoration: none;
  display: inline-block;
  transition: all 0.2s;
}
.btn-secondary:hover { background: rgba(0,212,170,0.08); }

.hero-socials { display: flex; gap: 16px; }
.hero-socials a {
  width: 38px; height: 38px;
  border: 1px solid var(--border);
  display: flex; align-items: center; justify-content: center;
  color: var(--text2);
  text-decoration: none;
  font-size: 15px;
  transition: all 0.2s;
}
.hero-socials a:hover {
  border-color: var(--accent);
  color: var(--accent);
  transform: translateY(-2px);
}

/* ── ABOUT ── */
#about { border-top: 1px solid var(--border); }

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: start;
}

.about-text p {
  color: var(--text2);
  margin-bottom: 16px;
  font-size: 15px;
  line-height: 1.85;
}
.about-text strong { color: var(--accent); font-weight: 600; }

.about-stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.stat-card {
  background: var(--card);
  border: 1px solid var(--border);
  padding: 20px;
  position: relative;
  overflow: hidden;
}
.stat-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0;
  width: 3px; height: 100%;
  background: var(--accent);
}

.stat-num {
  font-family: var(--mono);
  font-size: 28px;
  color: var(--accent);
  font-weight: 700;
  line-height: 1;
  margin-bottom: 6px;
}
.stat-label {
  font-size: 12px;
  color: var(--text2);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* ── SKILLS ── */
#skills { border-top: 1px solid var(--border); }

.skill-group { margin-bottom: 32px; }

.skill-group-title {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--accent2);
  text-transform: uppercase;
  letter-spacing: 0.15em;
  margin-bottom: 14px;
  display: flex;
  align-items: center;
  gap: 10px;
}
.skill-group-title::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--border);
}

.skill-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.tag {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--text2);
  background: var(--card);
  border: 1px solid var(--border);
  padding: 5px 12px;
  letter-spacing: 0.04em;
  transition: all 0.2s;
  cursor: default;
}
.tag:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: rgba(0,212,170,0.05);
}
.tag.hot {
  border-color: rgba(0,212,170,0.4);
  color: var(--accent);
  background: rgba(0,212,170,0.06);
}

/* ── EXPERIENCE ── */
#experience { border-top: 1px solid var(--border); }

.timeline { position: relative; }
.timeline::before {
  content: '';
  position: absolute;
  left: 0; top: 0; bottom: 0;
  width: 1px;
  background: linear-gradient(to bottom, var(--accent), var(--border));
}

.timeline-item {
  padding-left: 32px;
  padding-bottom: 48px;
  position: relative;
}

.timeline-dot {
  position: absolute;
  left: -5px; top: 6px;
  width: 11px; height: 11px;
  background: var(--accent);
  border: 2px solid var(--bg);
  border-radius: 0;
  transform: rotate(45deg);
}

.exp-card {
  background: var(--card);
  border: 1px solid var(--border);
  padding: 28px;
  transition: border-color 0.2s;
}
.exp-card:hover { border-color: rgba(0,212,170,0.3); }

.exp-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 16px;
  margin-bottom: 6px;
  flex-wrap: wrap;
}

.exp-title {
  font-size: 17px;
  font-weight: 600;
  color: var(--text);
}

.exp-date {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--accent);
  background: rgba(0,212,170,0.08);
  border: 1px solid rgba(0,212,170,0.2);
  padding: 3px 10px;
  white-space: nowrap;
}

.exp-company {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--accent2);
  margin-bottom: 16px;
}

.exp-card ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.exp-card ul li {
  color: var(--text2);
  font-size: 14px;
  padding-left: 16px;
  position: relative;
  line-height: 1.65;
}
.exp-card ul li::before {
  content: '▸';
  position: absolute;
  left: 0;
  color: var(--accent);
  font-size: 10px;
  top: 4px;
}
.exp-card ul li strong { color: var(--text); font-weight: 600; }

/* ── PROJECTS ── */
#projects { border-top: 1px solid var(--border); }

.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 20px;
}

.proj-card {
  background: var(--card);
  border: 1px solid var(--border);
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  transition: all 0.25s;
  position: relative;
  overflow: hidden;
}
.proj-card::after {
  content: '';
  position: absolute;
  bottom: 0; left: 0; right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--accent), var(--accent2));
  transform: scaleX(0);
  transition: transform 0.3s;
}
.proj-card:hover { border-color: rgba(0,212,170,0.3); transform: translateY(-3px); }
.proj-card:hover::after { transform: scaleX(1); }

.proj-type {
  font-family: var(--mono);
  font-size: 10px;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.15em;
}
.proj-title {
  font-size: 16px;
  font-weight: 600;
  color: var(--text);
  line-height: 1.3;
}
.proj-desc {
  font-size: 13px;
  color: var(--text2);
  line-height: 1.7;
  flex: 1;
}

.proj-stack {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}
.stack-tag {
  font-family: var(--mono);
  font-size: 10px;
  color: var(--accent2);
  background: rgba(0,136,255,0.08);
  border: 1px solid rgba(0,136,255,0.2);
  padding: 2px 8px;
}

.proj-links { display: flex; gap: 12px; }
.proj-links a {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--text2);
  text-decoration: none;
  letter-spacing: 0.05em;
  display: flex;
  align-items: center;
  gap: 5px;
  transition: color 0.2s;
}
.proj-links a:hover { color: var(--accent); }

/* ── EDUCATION ── */
#education { border-top: 1px solid var(--border); }

.edu-grid { display: flex; flex-direction: column; gap: 20px; }

.edu-card {
  background: var(--card);
  border: 1px solid var(--border);
  padding: 28px;
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 16px;
  align-items: start;
}
.edu-degree {
  font-size: 16px;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 4px;
}
.edu-school {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--accent2);
  margin-bottom: 12px;
}
.edu-detail {
  font-size: 13px;
  color: var(--text2);
}
.edu-gpa {
  font-family: var(--mono);
  font-size: 22px;
  color: var(--accent);
  font-weight: 700;
  text-align: right;
  white-space: nowrap;
}
.edu-gpa-label {
  font-family: var(--mono);
  font-size: 10px;
  color: var(--text3);
  text-align: right;
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

/* ── CERTIFICATIONS ── */
#certifications { border-top: 1px solid var(--border); }

.cert-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 16px;
}
.cert-card {
  background: var(--card);
  border: 1px solid var(--border);
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  transition: border-color 0.2s;
}
.cert-card:hover { border-color: rgba(0,212,170,0.3); }
.cert-name {
  font-size: 14px;
  font-weight: 600;
  color: var(--text);
}
.cert-issuer {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--text2);
}
.cert-date {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--text3);
}
.cert-link {
  margin-top: 8px;
  font-family: var(--mono);
  font-size: 11px;
  color: var(--accent);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 5px;
  transition: opacity 0.2s;
}
.cert-link:hover { opacity: 0.7; }

/* ── CONTACT ── */
#contact {
  border-top: 1px solid var(--border);
  text-align: center;
}
.contact-sub {
  font-family: var(--mono);
  font-size: 13px;
  color: var(--text2);
  max-width: 480px;
  margin: 0 auto 40px;
  line-height: 1.7;
}
.contact-grid {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 16px;
  margin-bottom: 40px;
}
.contact-item {
  display: flex;
  align-items: center;
  gap: 10px;
  background: var(--card);
  border: 1px solid var(--border);
  padding: 14px 22px;
  text-decoration: none;
  color: var(--text2);
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  transition: all 0.2s;
}
.contact-item:hover {
  border-color: var(--accent);
  color: var(--accent);
}
.contact-item i { color: var(--accent); }

.footer-line {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--text3);
  letter-spacing: 0.08em;
  border-top: 1px solid var(--border);
  padding-top: 32px;
  margin-top: 20px;
}

/* ── ANIMATIONS ── */
.fade-in {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ── RESPONSIVE ── */
@media (max-width: 768px) {
  .nav-links { display: none; }
  .hamburger { display: flex; }
  section { padding: 80px 5% 60px; }
  .about-grid { grid-template-columns: 1fr; gap: 40px; }
  .about-stats { grid-template-columns: 1fr 1fr; }
  .hero-inner { padding: 0 5%; }
  .hero-name { font-size: clamp(36px, 10vw, 60px); }
  .edu-card { grid-template-columns: 1fr; }
  .edu-gpa { text-align: left; }
  .edu-gpa-label { text-align: left; }
  .projects-grid { grid-template-columns: 1fr; }
}