/* ===========================
   ROOT & RESET
   =========================== */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  --bg:          #0d1117;
  --bg-alt:      #161b22;
  --bg-card:     #1c2230;
  --border:      #30363d;
  --accent:      #58a6ff;
  --accent-glow: rgba(88, 166, 255, 0.15);
  --accent2:     #3fb950;
  --text:        #e6edf3;
  --text-muted:  #8b949e;
  --red:         #ff7b72;
  --yellow:      #d29922;
  --radius:      12px;
  --radius-sm:   6px;
  --shadow:      0 8px 32px rgba(0,0,0,0.4);
  --transition:  0.3s ease;
  --font-mono:   'JetBrains Mono', monospace;
  --font-main:   'Inter', sans-serif;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

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

a {
  color: inherit;
  text-decoration: none;
}

ul {
  list-style: none;
}

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

.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ===========================
   SCROLLBAR
   =========================== */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--accent); }

/* ===========================
   NAVBAR
   =========================== */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: 16px 0;
  transition: background var(--transition), box-shadow var(--transition), padding var(--transition);
}

.navbar.scrolled {
  background: rgba(13, 17, 23, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: 0 1px 0 var(--border);
  padding: 10px 0;
}

.nav-inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  font-family: var(--font-mono);
  font-size: 1.1rem;
  font-weight: 500;
  color: var(--text);
  letter-spacing: -0.5px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 32px;
}

.nav-links a {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-muted);
  transition: color var(--transition);
  position: relative;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--accent);
  border-radius: 2px;
  transition: width var(--transition);
}

.nav-links a:hover {
  color: var(--text);
}

.nav-links a:hover::after {
  width: 100%;
}

.nav-cta {
  background: var(--accent) !important;
  color: var(--bg) !important;
  padding: 8px 18px;
  border-radius: 20px;
  font-weight: 600 !important;
  transition: opacity var(--transition) !important;
}

.nav-cta::after { display: none !important; }

.nav-cta:hover {
  opacity: 0.85;
}

.burger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.burger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: var(--transition);
}

.burger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.burger.open span:nth-child(2) { opacity: 0; }
.burger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ===========================
   HERO
   =========================== */
.hero {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  position: relative;
  overflow: hidden;
  padding: 100px 0 60px;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 80% 50% at 60% 40%, rgba(88, 166, 255, 0.07) 0%, transparent 70%),
    radial-gradient(ellipse 50% 40% at 10% 80%, rgba(63, 185, 80, 0.05) 0%, transparent 60%);
  pointer-events: none;
}

.hero-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  align-items: center;
  gap: 60px;
}

.hero-greeting {
  font-size: 1rem;
  color: var(--text-muted);
  font-family: var(--font-mono);
  margin-bottom: 12px;
}

.hero-name {
  font-size: clamp(2.2rem, 5vw, 3.4rem);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -1px;
  margin-bottom: 20px;
}

.hero-role {
  margin-bottom: 20px;
}

.role-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--accent-glow);
  border: 1px solid rgba(88, 166, 255, 0.3);
  color: var(--accent);
  padding: 6px 16px;
  border-radius: 20px;
  font-size: 0.9rem;
  font-weight: 500;
  font-family: var(--font-mono);
}

.hero-summary {
  color: var(--text-muted);
  font-size: 1rem;
  max-width: 520px;
  margin-bottom: 32px;
  line-height: 1.75;
}

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

/* ===========================
   BUTTONS
   =========================== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: 8px;
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition);
  border: none;
}

.btn-primary {
  background: var(--accent);
  color: var(--bg);
}

.btn-primary:hover {
  background: #79b8ff;
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(88, 166, 255, 0.3);
}

.btn-outline {
  background: transparent;
  color: var(--text);
  border: 1px solid var(--border);
}

.btn-outline:hover {
  border-color: var(--accent);
  color: var(--accent);
  transform: translateY(-2px);
}

/* ===========================
   TERMINAL CARD
   =========================== */
.terminal-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  font-family: var(--font-mono);
  font-size: 0.85rem;
}

.terminal-header {
  background: var(--bg-alt);
  padding: 12px 16px;
  display: flex;
  align-items: center;
  gap: 8px;
  border-bottom: 1px solid var(--border);
}

.dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
}

.dot.red    { background: #ff5f57; }
.dot.yellow { background: #febc2e; }
.dot.green  { background: #28c840; }

.terminal-title {
  margin-left: auto;
  margin-right: auto;
  color: var(--text-muted);
  font-size: 0.8rem;
}

.terminal-body {
  padding: 20px;
  min-height: 180px;
  line-height: 1.9;
}

.terminal-body p {
  color: var(--accent2);
}

.cmd {
  color: var(--accent);
  user-select: none;
  margin-right: 8px;
}

.typed {
  color: var(--text);
  white-space: pre-wrap;
}

.cursor {
  display: inline-block;
  color: var(--accent);
  animation: blink 1s step-start infinite;
}

@keyframes blink {
  50% { opacity: 0; }
}

#terminal-output {
  margin-top: 8px;
  padding-top: 8px;
  border-top: 1px solid var(--border);
}

#terminal-output p {
  color: var(--text-muted);
  font-size: 0.8rem;
  line-height: 1.8;
}

#terminal-output p span.hl {
  color: var(--accent2);
}

/* ===========================
   SCROLL HINT
   =========================== */
.scroll-hint {
  position: absolute;
  bottom: 28px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  color: var(--text-muted);
  font-size: 0.75rem;
  animation: float 2s ease-in-out infinite;
}

@keyframes float {
  0%, 100% { transform: translateX(-50%) translateY(0); }
  50%       { transform: translateX(-50%) translateY(6px); }
}

/* ===========================
   SECTIONS
   =========================== */
.section {
  padding: 100px 0;
}

.section-alt {
  background: var(--bg-alt);
}

.section-title {
  font-size: clamp(1.8rem, 3vw, 2.2rem);
  font-weight: 700;
  margin-bottom: 56px;
  letter-spacing: -0.5px;
  position: relative;
  display: inline-block;
}

.section-title::after {
  content: '';
  position: absolute;
  bottom: -12px;
  left: 0;
  width: 48px;
  height: 3px;
  background: var(--accent);
  border-radius: 2px;
}

/* ===========================
   TIMELINE
   =========================== */
.timeline {
  position: relative;
  padding-left: 32px;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 7px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  background: linear-gradient(to bottom, var(--accent), var(--border));
  border-radius: 2px;
}

.timeline-item {
  position: relative;
  margin-bottom: 48px;
  opacity: 0;
  transform: translateX(-20px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}

.timeline-item.visible {
  opacity: 1;
  transform: translateX(0);
}

.timeline-dot {
  position: absolute;
  left: -28px;
  top: 20px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--bg-card);
  border: 2px solid var(--accent);
  box-shadow: 0 0 0 4px var(--accent-glow);
}

.timeline-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  transition: border-color var(--transition), box-shadow var(--transition);
}

.timeline-card:hover {
  border-color: var(--accent);
  box-shadow: 0 0 0 1px var(--accent), var(--shadow);
}

.timeline-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 12px;
}

.timeline-date {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.82rem;
  color: var(--text-muted);
  font-family: var(--font-mono);
}

.timeline-badge {
  font-size: 0.72rem;
  font-weight: 600;
  padding: 2px 10px;
  border-radius: 20px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.timeline-badge.current {
  background: rgba(63, 185, 80, 0.15);
  border: 1px solid rgba(63, 185, 80, 0.4);
  color: var(--accent2);
}

.timeline-company {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 4px;
}

.timeline-role {
  font-size: 0.9rem;
  color: var(--accent);
  font-weight: 500;
  margin-bottom: 16px;
  font-family: var(--font-mono);
}

.timeline-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 20px;
}

.timeline-list li {
  color: var(--text-muted);
  font-size: 0.92rem;
  padding-left: 16px;
  position: relative;
  line-height: 1.6;
}

.timeline-list li::before {
  content: '▹';
  position: absolute;
  left: 0;
  color: var(--accent);
}

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

.timeline-tags span {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--accent);
  background: var(--accent-glow);
  border: 1px solid rgba(88, 166, 255, 0.2);
  padding: 3px 10px;
  border-radius: 4px;
}

/* ===========================
   SKILLS GRID
   =========================== */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 24px;
}

.skill-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px 24px;
  text-align: center;
  transition: border-color var(--transition), transform var(--transition), box-shadow var(--transition);
  opacity: 0;
  transform: translateY(20px);
}

.skill-card.visible {
  opacity: 1;
  transform: translateY(0);
}

.skill-card:hover {
  border-color: var(--accent);
  transform: translateY(-6px);
  box-shadow: 0 12px 40px rgba(88, 166, 255, 0.12);
}

.skill-icon {
  font-size: 2rem;
  color: var(--accent);
  margin-bottom: 16px;
}

.skill-card h3 {
  font-size: 0.95rem;
  font-weight: 700;
  margin-bottom: 16px;
  color: var(--text);
}

.skill-card ul {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.skill-card ul li {
  font-size: 0.88rem;
  color: var(--text-muted);
}

/* ===========================
   EDUCATION
   =========================== */
.edu-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
}

.edu-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px;
  display: flex;
  gap: 20px;
  align-items: flex-start;
  transition: border-color var(--transition), box-shadow var(--transition);
  opacity: 0;
  transform: translateY(20px);
}

.edu-card.visible {
  opacity: 1;
  transform: translateY(0);
}

.edu-card:hover {
  border-color: var(--accent);
  box-shadow: 0 0 0 1px var(--accent), var(--shadow);
}

.edu-icon {
  font-size: 1.6rem;
  color: var(--accent);
  margin-top: 4px;
  flex-shrink: 0;
}

.edu-info h3 {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 6px;
}

.edu-major {
  color: var(--accent);
  font-size: 0.88rem;
  font-weight: 500;
  font-family: var(--font-mono);
  margin-bottom: 6px;
}

.edu-year {
  font-size: 0.82rem;
  color: var(--text-muted);
  font-family: var(--font-mono);
  margin-bottom: 8px;
}

.edu-gpa {
  font-size: 0.88rem;
  color: var(--text-muted);
}

.edu-gpa strong {
  color: var(--accent2);
}

/* ===========================
   CONTACT
   =========================== */
.contact-sub {
  color: var(--text-muted);
  margin-bottom: 40px;
  font-size: 1rem;
}

.contact-cards {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
}

.contact-card {
  display: flex;
  align-items: center;
  gap: 14px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px 28px;
  flex: 1;
  min-width: 240px;
  transition: border-color var(--transition), box-shadow var(--transition), transform var(--transition);
  opacity: 0;
  transform: translateY(20px);
}

.contact-card.visible {
  opacity: 1;
  transform: translateY(0);
}

.contact-card:hover {
  border-color: var(--accent);
  box-shadow: 0 0 0 1px var(--accent);
  transform: translateY(-4px);
}

.contact-card i {
  font-size: 1.2rem;
  color: var(--accent);
  flex-shrink: 0;
}

.contact-card span {
  font-size: 0.92rem;
  color: var(--text-muted);
}

/* ===========================
   FOOTER
   =========================== */
.footer {
  background: var(--bg);
  border-top: 1px solid var(--border);
  padding: 28px 0;
  text-align: center;
}

.footer p {
  color: var(--text-muted);
  font-size: 0.85rem;
}

.footer code {
  font-family: var(--font-mono);
  color: var(--accent);
  background: var(--accent-glow);
  padding: 2px 6px;
  border-radius: 4px;
}

/* ===========================
   AOS (scroll animation)
   =========================== */
[data-aos] {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

[data-aos].visible {
  opacity: 1;
  transform: translateY(0);
}

/* ===========================
   RESPONSIVE
   =========================== */
@media (max-width: 768px) {
  .hero-content {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .hero-visual {
    order: -1;
  }

  .nav-links {
    display: none;
    position: fixed;
    top: 64px;
    left: 0;
    right: 0;
    background: rgba(13, 17, 23, 0.98);
    backdrop-filter: blur(16px);
    flex-direction: column;
    padding: 24px;
    gap: 24px;
    border-bottom: 1px solid var(--border);
  }

  .nav-links.open {
    display: flex;
  }

  .burger {
    display: flex;
  }

  .timeline {
    padding-left: 24px;
  }

  .timeline-dot {
    left: -22px;
  }

  .contact-card {
    min-width: 100%;
  }

  .skills-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 480px) {
  .hero-actions {
    flex-direction: column;
  }

  .skills-grid {
    grid-template-columns: 1fr;
  }

  .edu-grid {
    grid-template-columns: 1fr;
  }
}