:root {
  --primary: #0f172a;
  --accent: #3b82f6;
  --accent-light: #60a5fa;
  --secondary: #64748b;
  --bg: #f8fafc;
  --white: #ffffff;
  --border: #e2e8f0;
  --text: #1e293b;
  --text-muted: #64748b;
  --card-bg: #ffffff;
  --hero-bg: linear-gradient(135deg, #0f172a 0%, #1e3a5f 60%, #1e40af 100%);
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
}

/* ── NAV ── */
nav {
  position: fixed;
  top: 0;
  width: 100%;
  z-index: 1000;
  background: rgba(15, 23, 42, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(255,255,255,0.08);
}

.nav-inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 2rem;
  height: 60px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  font-size: 1.1rem;
  font-weight: 700;
  color: #fff;
  letter-spacing: -0.3px;
  text-decoration: none;
  display: flex;
  align-items: center;
}

.nav-logo span {
  color: var(--accent-light);
}

.nav-logo-photo {
  width: 30px;
  height: 30px;
  border-radius: 50%;
  object-fit: cover;
  object-position: top center;
  border: 2px solid rgba(96,165,250,0.5);
  vertical-align: middle;
  margin-right: 0.5rem;
}

.nav-links {
  display: flex;
  gap: 2rem;
  list-style: none;
}

.nav-links a {
  color: rgba(255,255,255,0.7);
  text-decoration: none;
  font-size: 0.875rem;
  font-weight: 500;
  transition: color 0.2s;
}

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

/* ── HERO ── */
.hero {
  min-height: 100vh;
  background: var(--hero-bg);
  display: flex;
  align-items: center;
  padding: 80px 2rem 4rem;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -40%;
  right: -20%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(59,130,246,0.15) 0%, transparent 70%);
  pointer-events: none;
}

.hero-inner {
  max-width: 1100px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 4rem;
  width: 100%;
}

.hero-photo {
  flex-shrink: 0;
}

.hero-photo img {
  width: 200px;
  height: 200px;
  border-radius: 50%;
  object-fit: cover;
  object-position: top center;
  border: 4px solid rgba(96,165,250,0.5);
  box-shadow: 0 0 0 8px rgba(59,130,246,0.1), 0 20px 60px rgba(0,0,0,0.4);
}

.hero-text {
  flex: 1;
}

.hero-badge {
  display: inline-block;
  background: rgba(59,130,246,0.2);
  color: var(--accent-light);
  border: 1px solid rgba(96,165,250,0.3);
  padding: 0.3rem 0.9rem;
  border-radius: 100px;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.5px;
  text-transform: uppercase;
  margin-bottom: 1rem;
}

.hero-name {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 800;
  color: #fff;
  letter-spacing: -1px;
  line-height: 1.15;
  margin-bottom: 0.5rem;
}

.hero-title {
  font-size: 1.15rem;
  color: rgba(255,255,255,0.6);
  margin-bottom: 1.5rem;
  font-weight: 400;
}

.hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem;
  margin-bottom: 2rem;
}

.hero-meta-item {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  color: rgba(255,255,255,0.65);
  font-size: 0.9rem;
}

.hero-meta-item svg {
  color: var(--accent-light);
  flex-shrink: 0;
}

.hero-meta-item a {
  color: rgba(255,255,255,0.65);
  text-decoration: none;
  transition: color 0.2s;
}

.hero-meta-item a:hover {
  color: var(--accent-light);
}

.hero-actions {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.65rem 1.4rem;
  border-radius: 8px;
  font-size: 0.9rem;
  font-weight: 600;
  text-decoration: none;
  transition: all 0.2s;
  cursor: pointer;
  border: none;
}

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

.btn-primary:hover {
  background: #2563eb;
  transform: translateY(-1px);
  box-shadow: 0 8px 20px rgba(59,130,246,0.4);
}

.btn-outline {
  background: transparent;
  color: rgba(255,255,255,0.8);
  border: 1px solid rgba(255,255,255,0.25);
}

.btn-outline:hover {
  background: rgba(255,255,255,0.08);
  border-color: rgba(255,255,255,0.5);
}

.hero-stats {
  display: flex;
  gap: 2rem;
  margin-top: 2.5rem;
  padding-top: 2rem;
  border-top: 1px solid rgba(255,255,255,0.1);
}

.stat-item {
  text-align: center;
}

.stat-number {
  font-size: 1.8rem;
  font-weight: 800;
  color: var(--accent-light);
  line-height: 1;
}

.stat-label {
  font-size: 0.75rem;
  color: rgba(255,255,255,0.5);
  margin-top: 0.25rem;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

/* ── SECTIONS ── */
section {
  padding: 5rem 2rem;
}

.section-inner {
  max-width: 1100px;
  margin: 0 auto;
}

.section-header {
  margin-bottom: 3rem;
}

.section-label {
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 0.5rem;
}

.section-title {
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 800;
  color: var(--primary);
  letter-spacing: -0.5px;
}

/* ── ABOUT ── */
#about {
  background: var(--white);
}

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: start;
}

.about-text p {
  color: var(--text-muted);
  margin-bottom: 1rem;
  font-size: 1rem;
  line-height: 1.8;
}

.strengths-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.strengths-list li {
  display: flex;
  align-items: flex-start;
  gap: 0.6rem;
  color: var(--text-muted);
  font-size: 0.95rem;
}

.strengths-list li::before {
  content: '';
  width: 6px;
  height: 6px;
  background: var(--accent);
  border-radius: 50%;
  margin-top: 0.55rem;
  flex-shrink: 0;
}

.about-card {
  background: var(--bg);
  border-radius: 16px;
  padding: 2rem;
}

.about-card-title {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  color: var(--accent);
  margin-bottom: 1.2rem;
}

.lang-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.lang-tag {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 0.35rem 0.75rem;
  font-size: 0.85rem;
  color: var(--text);
  font-weight: 500;
}

/* ── SKILLS ── */
#skills {
  background: var(--bg);
}

.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
}

.skill-card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 1.5rem;
  transition: transform 0.2s, box-shadow 0.2s;
}

.skill-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 12px 30px rgba(0,0,0,0.08);
}

.skill-card-header {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 1rem;
}

.skill-icon {
  width: 38px;
  height: 38px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
}

.skill-card-title {
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.8px;
  color: var(--text);
}

.skill-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}

.skill-tag {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 0.25rem 0.6rem;
  font-size: 0.8rem;
  color: var(--text-muted);
  font-weight: 500;
}

/* ── EXPERIENCE ── */
#experience {
  background: var(--white);
}

.timeline {
  position: relative;
  padding-left: 2rem;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 0;
  top: 8px;
  bottom: 8px;
  width: 2px;
  background: linear-gradient(to bottom, var(--accent), var(--border));
  border-radius: 2px;
}

.timeline-item {
  position: relative;
  margin-bottom: 2.5rem;
  padding-left: 1.5rem;
}

.timeline-item:last-child {
  margin-bottom: 0;
}

.timeline-dot {
  position: absolute;
  left: -2.5rem;
  top: 6px;
  width: 12px;
  height: 12px;
  background: var(--accent);
  border-radius: 50%;
  border: 2px solid var(--white);
  box-shadow: 0 0 0 3px rgba(59,130,246,0.2);
}

.timeline-item:first-child .timeline-dot {
  background: var(--accent);
  box-shadow: 0 0 0 3px rgba(59,130,246,0.3), 0 0 12px rgba(59,130,246,0.4);
}

.timeline-header {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: flex-start;
  gap: 0.5rem;
  margin-bottom: 0.4rem;
}

.timeline-role {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--primary);
}

.timeline-period {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--accent);
  background: rgba(59,130,246,0.08);
  border: 1px solid rgba(59,130,246,0.2);
  padding: 0.2rem 0.6rem;
  border-radius: 100px;
  white-space: nowrap;
}

.timeline-company {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-bottom: 0.75rem;
  font-style: italic;
}

.timeline-points {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  margin-bottom: 0.75rem;
}

.timeline-points li {
  font-size: 0.9rem;
  color: var(--text-muted);
  padding-left: 1rem;
  position: relative;
  line-height: 1.6;
}

.timeline-points li::before {
  content: '▸';
  position: absolute;
  left: 0;
  color: var(--accent);
  font-size: 0.75rem;
  top: 0.1rem;
}

.timeline-tech {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
}

.tech-chip {
  background: rgba(59,130,246,0.08);
  color: var(--accent);
  border: 1px solid rgba(59,130,246,0.2);
  border-radius: 5px;
  padding: 0.15rem 0.55rem;
  font-size: 0.75rem;
  font-weight: 600;
}

/* ── EDUCATION ── */
#education {
  background: var(--bg);
}

.edu-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 1.5rem;
}

.edu-card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 1.75rem;
  position: relative;
  overflow: hidden;
  transition: transform 0.2s, box-shadow 0.2s;
}

.edu-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 12px 30px rgba(0,0,0,0.08);
}

.edu-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--accent), var(--accent-light));
}

.edu-degree {
  font-size: 1rem;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 0.4rem;
}

.edu-university {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-bottom: 1rem;
}

.edu-meta {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.edu-chip {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-muted);
}

.edu-chip .dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
}

/* ── ACHIEVEMENTS ── */
#achievements {
  background: var(--primary);
}

#achievements .section-label {
  color: var(--accent-light);
}

#achievements .section-title {
  color: #fff;
}

.achievements-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1rem;
}

.achievement-card {
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: 12px;
  padding: 1.25rem 1.5rem;
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  transition: background 0.2s;
}

.achievement-card:hover {
  background: rgba(255,255,255,0.08);
}

.achievement-icon {
  font-size: 1.3rem;
  flex-shrink: 0;
  margin-top: 0.1rem;
}

.achievement-text {
  font-size: 0.9rem;
  color: rgba(255,255,255,0.75);
  line-height: 1.6;
}

/* ── CONTACT ── */
#contact {
  background: var(--white);
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: start;
}

.contact-lead {
  font-size: 1rem;
  color: var(--text-muted);
  line-height: 1.8;
  margin-bottom: 2rem;
}

.contact-links {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.contact-link {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1rem 1.25rem;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 12px;
  text-decoration: none;
  transition: all 0.2s;
}

.contact-link:hover {
  border-color: var(--accent);
  transform: translateX(4px);
  box-shadow: 0 4px 15px rgba(59,130,246,0.12);
}

.contact-link-icon {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  flex-shrink: 0;
}

.contact-link-body {
  flex: 1;
}

.contact-link-label {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.8px;
  color: var(--text-muted);
}

.contact-link-value {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--primary);
}

.contact-link-arrow {
  color: var(--text-muted);
  font-size: 0.9rem;
  transition: transform 0.2s;
}

.contact-link:hover .contact-link-arrow {
  transform: translateX(3px);
  color: var(--accent);
}

/* ── FOOTER ── */
footer {
  background: var(--primary);
  padding: 2rem;
  text-align: center;
  color: rgba(255,255,255,0.4);
  font-size: 0.85rem;
}

footer a {
  color: var(--accent-light);
  text-decoration: none;
}

/* ── RESPONSIVE ── */
@media (max-width: 768px) {
  .hero-inner {
    flex-direction: column;
    text-align: center;
    gap: 2rem;
  }

  .hero-meta {
    justify-content: center;
  }

  .hero-actions {
    justify-content: center;
  }

  .hero-stats {
    justify-content: center;
  }

  .about-grid,
  .contact-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .nav-links {
    display: none;
  }

  .timeline {
    padding-left: 1.5rem;
  }

  .timeline-dot {
    left: -2rem;
  }

  .timeline-item {
    padding-left: 1rem;
  }
}

@media (max-width: 480px) {
  .hero-stats {
    gap: 1.2rem;
  }

  .stat-number {
    font-size: 1.4rem;
  }
}