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

:root {
  --bg:        #0d1117;
  --bg-alt:    #161b22;
  --bg-card:   #1c2128;
  --border:    #30363d;
  --accent:    #58a6ff;
  --accent2:   #7c3aed;
  --text:      #e6edf3;
  --text-muted:#8b949e;
  --success:   #3fb950;
  --radius:    12px;
  --radius-sm: 6px;
  --transition: 0.25s ease;
  --shadow:    0 4px 24px rgba(0,0,0,0.4);
  --nav-h:     68px;
}

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

body {
  background: var(--bg);
  color: var(--text);
  font-family: 'Inter', system-ui, sans-serif;
  line-height: 1.7;
  overflow-x: hidden;
}

a { color: inherit; text-decoration: none; }
ul { list-style: none; }
img { max-width: 100%; display: block; }

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

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

/* ===========================
   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;
  background: rgba(13,17,23,0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid transparent;
  transition: border-color var(--transition), box-shadow var(--transition);
  height: var(--nav-h);
}

#navbar.scrolled {
  border-bottom-color: var(--border);
  box-shadow: 0 1px 20px rgba(0,0,0,0.4);
}

.nav-inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  font-family: 'JetBrains Mono', monospace;
  font-size: 1.35rem;
  font-weight: 500;
  letter-spacing: -0.5px;
  color: var(--text);
  transition: color var(--transition);
}
.nav-logo:hover { color: var(--accent); }

.nav-links {
  display: flex;
  align-items: center;
  gap: 8px;
}

.nav-links a {
  padding: 6px 14px;
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-muted);
  transition: color var(--transition), background var(--transition);
}
.nav-links a:hover { color: var(--text); background: rgba(88,166,255,0.08); }

.btn-nav {
  color: var(--accent) !important;
  border: 1px solid var(--accent) !important;
  padding: 6px 16px !important;
}
.btn-nav:hover { background: rgba(88,166,255,0.12) !important; }

.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}
.hamburger span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: var(--transition);
}
.hamburger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger.open span:nth-child(2) { opacity: 0; }
.hamburger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

.mobile-menu {
  display: none;
  flex-direction: column;
  background: var(--bg-alt);
  border-bottom: 1px solid var(--border);
  padding: 12px 24px 20px;
  gap: 4px;
}
.mobile-menu a {
  padding: 10px 12px;
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
  color: var(--text-muted);
  transition: color var(--transition), background var(--transition);
}
.mobile-menu a:hover { color: var(--text); background: rgba(88,166,255,0.08); }
.mobile-menu.open { display: flex; }

/* ===========================
   BUTTONS
=========================== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: transform var(--transition), box-shadow var(--transition), opacity var(--transition);
}
.btn:hover { transform: translateY(-2px); }
.btn:active { transform: translateY(0); }

.btn-primary {
  background: var(--accent);
  color: #0d1117;
  box-shadow: 0 0 20px rgba(88,166,255,0.3);
}
.btn-primary:hover { box-shadow: 0 0 32px rgba(88,166,255,0.5); }

.btn-outline {
  background: transparent;
  color: var(--accent);
  border: 1px solid var(--accent);
}
.btn-outline:hover { background: rgba(88,166,255,0.1); }

.btn-full { width: 100%; justify-content: center; }
.btn svg { width: 18px; height: 18px; flex-shrink: 0; }

/* ===========================
   SECTION COMMON
=========================== */
.section { padding: 96px 0; }
.section-alt { background: var(--bg-alt); }

.section-title {
  font-size: clamp(1.75rem, 4vw, 2.25rem);
  font-weight: 700;
  margin-bottom: 56px;
  position: relative;
  display: inline-block;
}
.section-title::after {
  content: '';
  position: absolute;
  bottom: -10px;
  left: 0;
  width: 48px;
  height: 3px;
  background: var(--accent);
  border-radius: 2px;
}

/* ===========================
   REVEAL ANIMATION
=========================== */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.55s ease, transform 0.55s ease;
}
.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ===========================
   HERO
=========================== */
#hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: var(--nav-h);
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 80% 60% at 50% -10%, rgba(88,166,255,0.12) 0%, transparent 70%),
              radial-gradient(ellipse 50% 40% at 90% 80%, rgba(124,58,237,0.08) 0%, transparent 70%);
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 1;
  padding-top: 48px;
  padding-bottom: 80px;
}

.hero-greeting {
  font-family: 'JetBrains Mono', monospace;
  color: var(--accent);
  font-size: 1rem;
  margin-bottom: 12px;
  letter-spacing: 0.05em;
}

.hero-name {
  font-size: clamp(2.8rem, 8vw, 5.5rem);
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: -2px;
  margin-bottom: 16px;
}

.hero-title {
  font-size: clamp(1.1rem, 2.5vw, 1.5rem);
  font-weight: 400;
  color: var(--text-muted);
  margin-bottom: 24px;
  min-height: 2.2rem;
  font-family: 'JetBrains Mono', monospace;
}

.cursor {
  display: inline-block;
  color: var(--accent);
  animation: blink 0.9s step-end infinite;
  font-weight: 300;
}
@keyframes blink { 0%,100% { opacity: 1; } 50% { opacity: 0; } }

.hero-desc {
  max-width: 560px;
  color: var(--text-muted);
  font-size: 1rem;
  margin-bottom: 36px;
  line-height: 1.8;
}

.hero-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 40px;
}

.hero-socials {
  display: flex;
  gap: 16px;
}
.hero-socials a {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-muted);
  transition: color var(--transition), border-color var(--transition), background var(--transition);
}
.hero-socials a svg { width: 18px; height: 18px; }
.hero-socials a:hover { color: var(--accent); border-color: var(--accent); background: rgba(88,166,255,0.08); }

.scroll-indicator {
  position: absolute;
  bottom: 40px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  color: var(--text-muted);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  animation: float 2s ease-in-out infinite;
}
.scroll-line {
  width: 1px;
  height: 40px;
  background: linear-gradient(to bottom, var(--text-muted), transparent);
}
@keyframes float { 0%,100% { transform: translateX(-50%) translateY(0); } 50% { transform: translateX(-50%) translateY(6px); } }

/* ===========================
   ABOUT
=========================== */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}

.about-text p {
  color: var(--text-muted);
  margin-bottom: 16px;
  font-size: 0.975rem;
  line-height: 1.8;
}
.about-text p strong { color: var(--text); }

.about-facts {
  display: flex;
  gap: 32px;
  margin-top: 32px;
  padding-top: 24px;
  border-top: 1px solid var(--border);
}
.fact { display: flex; flex-direction: column; gap: 2px; }
.fact-num { font-size: 2rem; font-weight: 700; line-height: 1; }
.fact-label { font-size: 0.78rem; color: var(--text-muted); letter-spacing: 0.03em; }

/* Code block */
.about-card { }
.code-block {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
}
.code-header {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 12px 16px;
  background: rgba(255,255,255,0.03);
  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; }
.code-filename {
  margin-left: 8px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.78rem;
  color: var(--text-muted);
}
.code-block pre {
  padding: 24px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.82rem;
  line-height: 1.8;
  overflow: auto;
}
.key  { color: #79c0ff; }
.str  { color: #a5d6ff; }
.bool { color: #ff7b72; }

/* ===========================
   SKILLS
=========================== */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.skill-category {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  transition: border-color var(--transition), transform var(--transition), box-shadow var(--transition);
}
.skill-category:hover {
  border-color: var(--accent);
  transform: translateY(-4px);
  box-shadow: 0 8px 32px rgba(88,166,255,0.1);
}

.skill-icon {
  width: 44px; height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(88,166,255,0.1);
  border-radius: var(--radius-sm);
  margin-bottom: 16px;
  color: var(--accent);
}
.skill-icon svg { width: 22px; height: 22px; }

.skill-category h3 {
  font-size: 0.95rem;
  font-weight: 600;
  margin-bottom: 14px;
  color: var(--text);
}

.skill-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.skill-tags span {
  background: rgba(88,166,255,0.08);
  border: 1px solid rgba(88,166,255,0.2);
  color: var(--text-muted);
  font-size: 0.75rem;
  padding: 3px 10px;
  border-radius: 100px;
  font-family: 'JetBrains Mono', monospace;
  transition: color var(--transition), background var(--transition);
}
.skill-category:hover .skill-tags span {
  color: var(--accent);
  background: rgba(88,166,255,0.12);
}

/* ===========================
   PROJECTS
=========================== */
.projects-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

.project-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  transition: border-color var(--transition), transform var(--transition), box-shadow var(--transition);
  position: relative;
}
.project-card:hover {
  border-color: var(--accent);
  transform: translateY(-4px);
  box-shadow: 0 12px 40px rgba(88,166,255,0.1);
}

.project-card.featured {
  grid-column: 1 / -1;
  border-color: rgba(88,166,255,0.3);
  background: linear-gradient(135deg, var(--bg-card) 0%, rgba(88,166,255,0.04) 100%);
}

.project-badge {
  position: absolute;
  top: 20px;
  right: 20px;
  background: rgba(88,166,255,0.15);
  border: 1px solid rgba(88,166,255,0.3);
  color: var(--accent);
  font-size: 0.72rem;
  font-weight: 600;
  padding: 3px 10px;
  border-radius: 100px;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.project-header {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 14px;
}
.project-icon {
  width: 44px; height: 44px;
  background: rgba(88,166,255,0.1);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  color: var(--accent);
}
.project-icon svg { width: 22px; height: 22px; }

.project-header h3 {
  font-size: 1.1rem;
  font-weight: 600;
}

.project-subtitle {
  font-size: 0.8rem;
  color: var(--accent);
  margin-bottom: 10px;
  font-family: 'JetBrains Mono', monospace;
}

.project-desc {
  color: var(--text-muted);
  font-size: 0.875rem;
  line-height: 1.75;
  margin-bottom: 16px;
}

.project-highlights {
  margin-bottom: 20px;
  padding-left: 0;
}
.project-highlights li {
  color: var(--text-muted);
  font-size: 0.85rem;
  padding: 4px 0 4px 16px;
  position: relative;
}
.project-highlights li::before {
  content: '▹';
  position: absolute;
  left: 0;
  color: var(--accent);
}

.project-tech {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 8px;
}
.project-tech span {
  background: rgba(88,166,255,0.08);
  border: 1px solid rgba(88,166,255,0.2);
  color: var(--text-muted);
  font-size: 0.72rem;
  padding: 3px 10px;
  border-radius: 100px;
  font-family: 'JetBrains Mono', monospace;
}

/* ===========================
   TIMELINE (EXPERIENCE)
=========================== */
.timeline {
  position: relative;
  padding-left: 32px;
}
.timeline::before {
  content: '';
  position: absolute;
  left: 7px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--border);
}

.timeline-item {
  position: relative;
  margin-bottom: 48px;
}
.timeline-item:last-child { margin-bottom: 0; }

.timeline-dot {
  position: absolute;
  left: -32px;
  top: 6px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--bg);
  border: 2px solid var(--accent);
  z-index: 1;
  transition: background var(--transition), box-shadow var(--transition);
}
.timeline-item:hover .timeline-dot {
  background: var(--accent);
  box-shadow: 0 0 12px rgba(88,166,255,0.5);
}

.timeline-content {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  transition: border-color var(--transition);
}
.timeline-item:hover .timeline-content { border-color: rgba(88,166,255,0.4); }

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

.timeline-header h3 {
  font-size: 1.05rem;
  font-weight: 600;
  margin-bottom: 4px;
}

.timeline-company {
  color: var(--accent);
  font-size: 0.9rem;
  font-weight: 500;
  margin-bottom: 2px;
}

.timeline-loc {
  color: var(--text-muted);
  font-size: 0.8rem;
}

.timeline-date {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.78rem;
  color: var(--text-muted);
  white-space: nowrap;
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--border);
  padding: 4px 10px;
  border-radius: 100px;
  flex-shrink: 0;
}

.timeline-bullets {
  padding-left: 0;
  margin-bottom: 16px;
}
.timeline-bullets li {
  color: var(--text-muted);
  font-size: 0.875rem;
  padding: 4px 0 4px 16px;
  position: relative;
  line-height: 1.75;
}
.timeline-bullets li::before {
  content: '▹';
  position: absolute;
  left: 0;
  color: var(--accent);
}
.timeline-bullets li strong { color: var(--text); }

/* ===========================
   EDUCATION
=========================== */
.edu-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  margin-bottom: 48px;
}

.edu-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  display: flex;
  gap: 20px;
  align-items: flex-start;
  transition: border-color var(--transition), transform var(--transition);
}
.edu-card:hover {
  border-color: rgba(88,166,255,0.4);
  transform: translateY(-3px);
}

.edu-icon {
  width: 44px; height: 44px;
  background: rgba(88,166,255,0.1);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  color: var(--accent);
}
.edu-icon svg { width: 22px; height: 22px; }

.edu-body h3 {
  font-size: 0.975rem;
  font-weight: 600;
  margin-bottom: 4px;
}
.edu-degree {
  color: var(--accent);
  font-size: 0.82rem;
  margin-bottom: 4px;
  font-family: 'JetBrains Mono', monospace;
}
.edu-meta {
  color: var(--text-muted);
  font-size: 0.78rem;
  margin-bottom: 12px;
}
.edu-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}
.edu-date {
  font-size: 0.78rem;
  color: var(--text-muted);
  font-family: 'JetBrains Mono', monospace;
}
.edu-gpa { font-size: 0.82rem; font-weight: 600; }

/* Certificate */
.cert-section { }
.cert-title {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 16px;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 0.78rem;
}
.cert-card {
  display: inline-flex;
  align-items: center;
  gap: 14px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px 24px;
  transition: border-color var(--transition);
}
.cert-card:hover { border-color: rgba(88,166,255,0.4); }
.cert-icon svg { width: 24px; height: 24px; }
.cert-name {
  font-size: 0.9rem;
  font-weight: 500;
}
.cert-issuer {
  font-size: 0.78rem;
  color: var(--text-muted);
  font-family: 'JetBrains Mono', monospace;
}

/* ===========================
   CONTACT
=========================== */
.contact-intro {
  max-width: 540px;
  color: var(--text-muted);
  margin-bottom: 48px;
  font-size: 1rem;
  line-height: 1.8;
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: start;
}

.contact-info { display: flex; flex-direction: column; gap: 28px; }

.contact-item {
  display: flex;
  align-items: flex-start;
  gap: 16px;
}
.contact-icon {
  width: 44px; height: 44px;
  background: rgba(88,166,255,0.1);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  color: var(--accent);
}
.contact-icon svg { width: 20px; height: 20px; }
.contact-label { font-size: 0.75rem; color: var(--text-muted); margin-bottom: 2px; text-transform: uppercase; letter-spacing: 0.08em; }
.contact-value { font-size: 0.9rem; color: var(--text); font-weight: 500; word-break: break-word; }
a.contact-value:hover { color: var(--accent); }

.contact-socials {
  display: flex;
  gap: 12px;
  padding-top: 8px;
}
.social-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 20px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-muted);
  transition: color var(--transition), border-color var(--transition), background var(--transition);
}
.social-btn svg { width: 16px; height: 16px; }
.social-btn:hover { color: var(--accent); border-color: var(--accent); background: rgba(88,166,255,0.08); }

/* Contact Form */
.contact-form {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.form-group label {
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}
.form-group input,
.form-group textarea {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text);
  font-family: 'Inter', sans-serif;
  font-size: 0.9rem;
  padding: 12px 16px;
  outline: none;
  transition: border-color var(--transition), box-shadow var(--transition);
  resize: vertical;
}
.form-group input::placeholder,
.form-group textarea::placeholder { color: var(--text-muted); }
.form-group input:focus,
.form-group textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(88,166,255,0.1);
}

.form-note {
  font-size: 0.82rem;
  text-align: center;
  min-height: 1.2em;
}
.form-note.success { color: var(--success); }
.form-note.error   { color: #ff7b72; }

/* ===========================
   FOOTER
=========================== */
footer {
  background: var(--bg);
  border-top: 1px solid var(--border);
  padding: 32px 0;
  text-align: center;
}
.footer-inner p { font-size: 0.875rem; color: var(--text-muted); }
.footer-sub { font-size: 0.78rem; margin-top: 4px; }

/* ===========================
   RESPONSIVE
=========================== */
@media (max-width: 900px) {
  .about-grid { grid-template-columns: 1fr; gap: 40px; }
  .skills-grid { grid-template-columns: repeat(2, 1fr); }
  .contact-grid { grid-template-columns: 1fr; gap: 40px; }
  .edu-grid { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
  .nav-links { display: none; }
  .hamburger { display: flex; }
  .projects-grid { grid-template-columns: 1fr; }
  .project-card.featured { grid-column: auto; }
  .about-facts { gap: 20px; }
  .timeline-header { flex-direction: column; }
}

@media (max-width: 560px) {
  .skills-grid { grid-template-columns: 1fr; }
  .hero-actions { flex-direction: column; }
  .hero-actions .btn { width: 100%; justify-content: center; }
  .contact-socials { flex-wrap: wrap; }
}