/* ─── TOKENS ─── */
:root {
  --bg:           #060d1a;
  --bg-2:         #0a1628;
  --bg-card:      #0d1e35;
  --bg-card-hover:#102440;
  --border:       rgba(59, 130, 246, 0.18);
  --border-hover: rgba(59, 130, 246, 0.4);

  --blue:         #3b82f6;
  --blue-dark:    #1d4ed8;
  --blue-light:   #60a5fa;
  --blue-glow:    rgba(59, 130, 246, 0.15);
  --blue-glow-lg: rgba(59, 130, 246, 0.08);

  --text:         #f0f6ff;
  --text-2:       #8ba3c0;
  --text-3:       #506880;

  --radius:       12px;
  --radius-lg:    20px;
  --transition:   0.25s cubic-bezier(0.4, 0, 0.2, 1);

  --nav-h:        72px;
  --container:    1160px;
}

/* ─── RESET ─── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; scroll-padding-top: var(--nav-h); }
body {
  font-family: 'Inter', system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
img { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }
button { cursor: pointer; border: none; background: none; font: inherit; }

/* ─── TYPOGRAPHY ─── */
.accent { color: var(--blue-light); }
.section-label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--blue);
  margin-bottom: 16px;
}
.section-label::before {
  content: '';
  display: block;
  width: 20px; height: 2px;
  background: var(--blue);
  border-radius: 2px;
}
.section-title {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.02em;
  color: var(--text);
}
.section-subtitle {
  font-size: 1.05rem;
  color: var(--text-2);
  margin-top: 16px;
  max-width: 520px;
}
.section-header { margin-bottom: 64px; }

/* ─── LAYOUT ─── */
.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}
section { padding: 120px 0; }

/* ─── BUTTONS ─── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 13px 26px;
  border-radius: 8px;
  font-size: 0.9rem;
  font-weight: 600;
  letter-spacing: 0.01em;
  transition: all var(--transition);
  white-space: nowrap;
}
.btn svg { width: 16px; height: 16px; flex-shrink: 0; transition: transform var(--transition); }
.btn:hover svg { transform: translateX(3px); }

.btn-primary {
  background: var(--blue);
  color: #fff;
  box-shadow: 0 0 0 0 transparent;
}
.btn-primary:hover {
  background: var(--blue-dark);
  box-shadow: 0 8px 24px rgba(37, 99, 235, 0.35);
  transform: translateY(-1px);
}

.btn-outline {
  border: 1.5px solid var(--border-hover);
  color: var(--blue-light);
  background: transparent;
}
.btn-outline:hover {
  background: var(--blue-glow);
  border-color: var(--blue);
  transform: translateY(-1px);
}

.btn-ghost {
  background: transparent;
  color: var(--text-2);
  border: 1.5px solid var(--border);
}
.btn-ghost:hover {
  border-color: var(--border-hover);
  color: var(--text);
  background: rgba(255,255,255,0.04);
}

.btn-sm { padding: 9px 18px; font-size: 0.82rem; }
.btn-full { width: 100%; justify-content: center; padding: 15px; }

/* ─── NAV ─── */
#navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--nav-h);
  z-index: 100;
  transition: background var(--transition), box-shadow var(--transition), backdrop-filter var(--transition);
}
#navbar.scrolled {
  background: rgba(6, 13, 26, 0.88);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  box-shadow: 0 1px 0 var(--border);
}
.nav-container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.nav-logo {
  font-size: 1.4rem;
  font-weight: 800;
  letter-spacing: -0.04em;
  color: var(--text);
}
.nav-logo-dot { color: var(--blue); }
.nav-links {
  display: flex;
  align-items: center;
  gap: 8px;
}
.nav-link {
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--text-2);
  padding: 8px 14px;
  border-radius: 6px;
  transition: all var(--transition);
}
.nav-link:hover { color: var(--text); background: rgba(255,255,255,0.05); }
.nav-link.active { color: var(--blue-light); }
.nav-cta {
  background: var(--blue) !important;
  color: #fff !important;
  padding: 8px 18px !important;
  border-radius: 7px;
}
.nav-cta:hover { background: var(--blue-dark) !important; color: #fff !important; }
.nav-hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 6px;
}
.nav-hamburger span {
  display: block;
  width: 22px; height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: all var(--transition);
}
.nav-hamburger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-hamburger.open span:nth-child(2) { opacity: 0; }
.nav-hamburger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ─── HERO ─── */
#hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 0 24px;
  overflow: hidden;
}
.hero-grid-bg {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(59, 130, 246, 0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(59, 130, 246, 0.06) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 50%, black 30%, transparent 100%);
  -webkit-mask-image: radial-gradient(ellipse 80% 60% at 50% 50%, black 30%, transparent 100%);
}
.hero-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  pointer-events: none;
}
.hero-orb-1 {
  width: 600px; height: 600px;
  background: radial-gradient(circle, rgba(29, 78, 216, 0.22) 0%, transparent 70%);
  top: -100px; left: -150px;
}
.hero-orb-2 {
  width: 500px; height: 500px;
  background: radial-gradient(circle, rgba(59, 130, 246, 0.15) 0%, transparent 70%);
  bottom: 0; right: -100px;
}
.hero-content {
  position: relative;
  z-index: 1;
  max-width: 800px;
}
.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--blue);
  border: 1px solid var(--border);
  background: rgba(59, 130, 246, 0.08);
  padding: 8px 16px;
  border-radius: 100px;
  margin-bottom: 28px;
}
.eyebrow-dot {
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--blue);
  box-shadow: 0 0 8px var(--blue);
  animation: pulse 2s infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.6; transform: scale(0.85); }
}
.hero-name {
  font-size: clamp(3.5rem, 8vw, 6.5rem);
  font-weight: 900;
  letter-spacing: -0.04em;
  line-height: 1;
  margin-bottom: 24px;
  color: var(--text);
}
.name-accent {
  background: linear-gradient(135deg, var(--blue-light) 0%, var(--blue) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero-tagline {
  font-size: clamp(1rem, 2vw, 1.2rem);
  color: var(--text-2);
  line-height: 1.7;
  margin-bottom: 40px;
}
.br-desktop { display: block; }
.hero-actions {
  display: flex;
  justify-content: center;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 64px;
}
.hero-stats {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0;
  flex-wrap: wrap;
  background: rgba(255,255,255,0.03);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px 40px;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}
.stat {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 0 32px;
}
.stat-number {
  font-size: 1.75rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  color: var(--text);
  background: linear-gradient(135deg, #fff 0%, var(--blue-light) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.stat-label {
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-3);
  margin-top: 4px;
}
.stat-divider {
  width: 1px;
  height: 40px;
  background: var(--border);
}
.hero-scroll {
  position: absolute;
  bottom: 36px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  z-index: 1;
  opacity: 0.5;
  transition: opacity var(--transition);
}
.hero-scroll:hover { opacity: 1; }
.scroll-mouse {
  width: 22px; height: 36px;
  border: 2px solid var(--text-3);
  border-radius: 12px;
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding-top: 6px;
}
.scroll-wheel {
  width: 3px; height: 6px;
  background: var(--text-3);
  border-radius: 3px;
  animation: scroll 1.8s infinite;
}
@keyframes scroll {
  0% { transform: translateY(0); opacity: 1; }
  100% { transform: translateY(10px); opacity: 0; }
}

/* ─── ABOUT ─── */
#about { background: var(--bg-2); }
.about-grid {
  display: grid;
  grid-template-columns: 360px 1fr;
  gap: 80px;
  align-items: start;
}
.about-photo-col { display: flex; flex-direction: column; align-items: center; gap: 20px; }
.about-photo-frame {
  position: relative;
  width: 300px; height: 300px;
  border-radius: 24px;
  overflow: hidden;
  border: 2px solid var(--border);
  box-shadow: 0 0 60px var(--blue-glow);
  background: var(--bg-card);
  display: flex; align-items: center; justify-content: center;
}
.about-photo-frame::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: 24px;
  background: linear-gradient(135deg, transparent 60%, rgba(59, 130, 246, 0.12) 100%);
  z-index: 1;
  pointer-events: none;
}
.about-photo {
  width: 100%; height: 100%;
  object-fit: cover;
  object-position: center top;
  display: block;
}
.about-photo-frame.no-photo .about-photo { display: none; }
.photo-initials {
  position: absolute;
  font-size: 4rem;
  font-weight: 800;
  color: var(--blue);
  display: none;
}
.about-photo-frame.no-photo .photo-initials { display: flex; }
.about-badges { display: flex; flex-direction: column; gap: 10px; width: 100%; }
.about-badge {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--text-2);
  background: var(--bg-card);
  border: 1px solid var(--border);
  padding: 10px 16px;
  border-radius: 8px;
}
.about-badge svg { width: 14px; height: 14px; color: var(--blue); flex-shrink: 0; }

.about-content h2 {
  font-size: clamp(1.8rem, 3vw, 2.6rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.2;
  margin-bottom: 28px;
}
.about-intro {
  font-size: 1.05rem;
  color: var(--text);
  margin-bottom: 16px;
}
.about-content p {
  color: var(--text-2);
  margin-bottom: 16px;
  font-size: 0.96rem;
}
.about-content p strong { color: var(--text); }
.about-links {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-top: 32px;
}

/* ─── EXPERIENCE ─── */
#experience { position: relative; }
#experience::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--border), transparent);
}
.timeline {
  position: relative;
  padding-left: 36px;
}
.timeline::before {
  content: '';
  position: absolute;
  left: 6px;
  top: 12px;
  bottom: 12px;
  width: 2px;
  background: linear-gradient(to bottom, var(--blue), rgba(59, 130, 246, 0.1));
  border-radius: 2px;
}
.timeline-item {
  position: relative;
  margin-bottom: 40px;
}
.timeline-item:last-child { margin-bottom: 0; }
.timeline-marker {
  position: absolute;
  left: -36px;
  top: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 28px; height: 28px;
}
.marker-dot {
  width: 14px; height: 14px;
  border-radius: 50%;
  background: var(--blue);
  border: 3px solid var(--bg);
  box-shadow: 0 0 12px rgba(59, 130, 246, 0.6);
}
.marker-dot-edu {
  background: var(--bg-card);
  border-color: var(--border-hover);
  box-shadow: none;
}
.timeline-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px;
  transition: all var(--transition);
}
.timeline-card:hover {
  border-color: var(--border-hover);
  background: var(--bg-card-hover);
  box-shadow: 0 8px 40px var(--blue-glow);
  transform: translateX(4px);
}
.timeline-card-edu {
  background: rgba(255,255,255,0.02);
  border-style: dashed;
}
.timeline-card-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 20px;
}
.timeline-role {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text);
  letter-spacing: -0.01em;
}
.timeline-company {
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--blue);
  margin-top: 4px;
}
.timeline-period { display: flex; flex-direction: column; align-items: flex-end; gap: 6px; }
.period-badge {
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--text-2);
  background: rgba(255,255,255,0.05);
  border: 1px solid var(--border);
  padding: 4px 10px;
  border-radius: 100px;
  white-space: nowrap;
}
.industry-tag {
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--blue);
  background: var(--blue-glow);
  border: 1px solid rgba(59, 130, 246, 0.25);
  padding: 3px 8px;
  border-radius: 4px;
}
.timeline-bullets {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 20px;
}
.timeline-bullets li {
  font-size: 0.9rem;
  color: var(--text-2);
  padding-left: 20px;
  position: relative;
  line-height: 1.65;
}
.timeline-bullets li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 10px;
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--blue);
  opacity: 0.7;
}
.timeline-bullets li strong { color: var(--text); font-weight: 600; }
.timeline-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.timeline-tags span {
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--text-3);
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.07);
  padding: 4px 10px;
  border-radius: 4px;
}

/* ─── SKILLS ─── */
#skills { background: var(--bg-2); }
.skills-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}
.skill-category {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px;
  transition: all var(--transition);
}
.skill-category:hover {
  border-color: var(--border-hover);
  box-shadow: 0 8px 40px var(--blue-glow-lg);
  transform: translateY(-2px);
}
.skill-category-icon {
  width: 44px; height: 44px;
  border-radius: 10px;
  background: var(--blue-glow);
  border: 1px solid rgba(59, 130, 246, 0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
}
.skill-category-icon svg {
  width: 20px; height: 20px;
  color: var(--blue);
}
.skill-category h3 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 16px;
}
.skill-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.skill-tags span {
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--text-2);
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--border);
  padding: 6px 12px;
  border-radius: 6px;
  transition: all var(--transition);
}
.skill-tags span:hover {
  color: var(--blue-light);
  border-color: rgba(59, 130, 246, 0.35);
  background: var(--blue-glow);
}

/* ─── CONTACT ─── */
#contact {
  border-top: 1px solid var(--border);
}
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.4fr;
  gap: 64px;
  align-items: start;
}
.contact-info { display: flex; flex-direction: column; gap: 16px; }
.contact-card {
  display: flex;
  align-items: center;
  gap: 16px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px 22px;
  transition: all var(--transition);
}
.contact-card:hover {
  border-color: var(--border-hover);
  background: var(--bg-card-hover);
  transform: translateX(4px);
}
.contact-card-location { cursor: default; }
.contact-card-location:hover { transform: none; border-color: var(--border); background: var(--bg-card); }
.contact-card-icon {
  width: 40px; height: 40px;
  border-radius: 8px;
  background: var(--blue-glow);
  border: 1px solid rgba(59,130,246,0.2);
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
}
.contact-card-icon svg { width: 18px; height: 18px; color: var(--blue); }
.contact-card-label {
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-3);
  margin-bottom: 2px;
}
.contact-card-value {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text);
}

.contact-form-wrap {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 40px;
}
.contact-form { display: flex; flex-direction: column; gap: 20px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.form-group { display: flex; flex-direction: column; gap: 8px; }
.form-group label {
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  color: var(--text-2);
  text-transform: uppercase;
}
.form-group input,
.form-group textarea {
  background: rgba(255,255,255,0.04);
  border: 1.5px solid var(--border);
  border-radius: 8px;
  padding: 12px 16px;
  font: inherit;
  font-size: 0.9rem;
  color: var(--text);
  outline: none;
  transition: border-color var(--transition), box-shadow var(--transition), background var(--transition);
  resize: vertical;
}
.form-group input::placeholder,
.form-group textarea::placeholder { color: var(--text-3); }
.form-group input:focus,
.form-group textarea:focus {
  border-color: var(--blue);
  background: rgba(59, 130, 246, 0.05);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.12);
}
.form-note {
  font-size: 0.76rem;
  color: var(--text-3);
  text-align: center;
  line-height: 1.5;
}
.form-note a { color: var(--blue); text-decoration: underline; text-underline-offset: 3px; }
.form-note code {
  font-size: 0.72rem;
  background: rgba(255,255,255,0.07);
  padding: 1px 5px;
  border-radius: 3px;
  font-family: 'Courier New', monospace;
}

/* ─── FOOTER ─── */
#footer {
  border-top: 1px solid var(--border);
  padding: 40px 0;
}
.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  flex-wrap: wrap;
}
.footer-logo {
  font-size: 1.3rem;
  font-weight: 800;
  letter-spacing: -0.04em;
  color: var(--text);
}
.footer-copy {
  font-size: 0.82rem;
  color: var(--text-3);
}
.footer-social {
  display: flex;
  gap: 12px;
}
.footer-social a {
  width: 36px; height: 36px;
  border-radius: 8px;
  border: 1px solid var(--border);
  display: flex; align-items: center; justify-content: center;
  color: var(--text-3);
  transition: all var(--transition);
}
.footer-social a svg { width: 16px; height: 16px; }
.footer-social a:hover {
  border-color: var(--border-hover);
  color: var(--blue-light);
  background: var(--blue-glow);
}

/* ─── SCROLL ANIMATIONS ─── */
.fade-in {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.6s cubic-bezier(0.4,0,0.2,1), transform 0.6s cubic-bezier(0.4,0,0.2,1);
}
.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}
.fade-in:nth-child(2) { transition-delay: 0.1s; }
.fade-in:nth-child(3) { transition-delay: 0.2s; }
.fade-in:nth-child(4) { transition-delay: 0.3s; }

/* ─── MOBILE MENU ─── */
@media (max-width: 768px) {
  .nav-hamburger { display: flex; }
  .nav-links {
    position: fixed;
    top: var(--nav-h);
    left: 0; right: 0;
    flex-direction: column;
    background: rgba(6, 13, 26, 0.97);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
    padding: 20px;
    gap: 4px;
    transform: translateY(-110%);
    transition: transform var(--transition);
  }
  .nav-links.open { transform: translateY(0); }
  .nav-link { padding: 12px 16px; width: 100%; text-align: center; }
  .nav-cta { text-align: center; }
}

/* ─── RESPONSIVE ─── */
@media (max-width: 900px) {
  .about-grid { grid-template-columns: 1fr; gap: 48px; }
  .about-photo-col { flex-direction: row; align-items: flex-start; flex-wrap: wrap; gap: 24px; }
  .about-photo-frame { width: 200px; height: 200px; }
  .skills-grid { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; gap: 40px; }
}

@media (max-width: 640px) {
  section { padding: 80px 0; }
  .hero-stats { padding: 20px 16px; gap: 0; }
  .stat { padding: 0 16px; }
  .stat-number { font-size: 1.35rem; }
  .br-desktop { display: none; }
  .form-row { grid-template-columns: 1fr; }
  .contact-form-wrap { padding: 24px; }
  .timeline { padding-left: 24px; }
  .timeline-card { padding: 20px; }
  .timeline-card-header { flex-direction: column; gap: 10px; }
  .timeline-period { flex-direction: row; align-items: center; }
  .footer-inner { justify-content: center; text-align: center; }
  .about-photo-col { justify-content: center; }
  .about-photo-frame { width: 240px; height: 240px; }
  .hero-stats { flex-direction: column; gap: 16px; }
  .stat-divider { width: 60px; height: 1px; }
}