/* ===== Variables ===== */
:root {
  --bg-primary: #0a0f1e;
  --bg-secondary: #111827;
  --bg-card: rgba(17, 24, 39, 0.7);
  --bg-card-hover: rgba(30, 41, 59, 0.8);
  --border: rgba(59, 130, 246, 0.15);
  --border-hover: rgba(59, 130, 246, 0.35);
  --text-primary: #f1f5f9;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --accent-blue: #3b82f6;
  --accent-blue-light: #60a5fa;
  --accent-amber: #f59e0b;
  --accent-amber-light: #fbbf24;
  --gradient-start: #3b82f6;
  --gradient-end: #8b5cf6;
  --radius: 12px;
  --radius-lg: 20px;
  --shadow: 0 4px 24px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 8px 40px rgba(0, 0, 0, 0.4);
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --font: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-display: 'Plus Jakarta Sans', var(--font);
}

/* ===== Reset ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; scroll-padding-top: 80px; }
body {
  font-family: var(--font);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.7;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--accent-blue-light); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--accent-amber-light); }
img { max-width: 100%; display: block; }
ul { list-style: none; }
.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }

/* ===== Background Effects ===== */
.bg-grid {
  position: fixed; inset: 0; z-index: 0; pointer-events: none;
  background-image:
    linear-gradient(rgba(59, 130, 246, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(59, 130, 246, 0.03) 1px, transparent 1px);
  background-size: 60px 60px;
}
.bg-glow {
  position: fixed; border-radius: 50%; filter: blur(120px); pointer-events: none; z-index: 0;
}
.bg-glow-1 {
  width: 600px; height: 600px; top: -200px; right: -100px;
  background: rgba(59, 130, 246, 0.12);
}
.bg-glow-2 {
  width: 500px; height: 500px; bottom: -150px; left: -100px;
  background: rgba(139, 92, 246, 0.1);
}

/* ===== Navigation ===== */
.nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
  background: rgba(10, 15, 30, 0.85);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  transition: box-shadow var(--transition);
}
.nav.scrolled { box-shadow: var(--shadow); }
.nav-inner {
  display: flex; align-items: center; justify-content: space-between;
  height: 72px;
}
.nav-logo {
  font-family: var(--font-display);
  font-size: 1.5rem; font-weight: 800;
  color: var(--text-primary); letter-spacing: -0.5px;
}
.nav-logo .accent { color: var(--accent-blue); }
.nav-links {
  display: flex; align-items: center; gap: 8px;
}
.nav-links a {
  color: var(--text-secondary); font-size: 0.9rem; font-weight: 500;
  padding: 8px 16px; border-radius: 8px; transition: all var(--transition);
}
.nav-links a:hover { color: var(--text-primary); background: rgba(59, 130, 246, 0.1); }
.nav-cta {
  background: var(--accent-blue) !important;
  color: white !important; font-weight: 600 !important;
}
.nav-cta:hover { background: var(--accent-blue-light) !important; color: white !important; }
.nav-toggle {
  display: none; flex-direction: column; gap: 5px;
  background: none; border: none; cursor: pointer; padding: 4px;
}
.nav-toggle span {
  display: block; width: 24px; height: 2px;
  background: var(--text-primary); border-radius: 2px;
  transition: all var(--transition);
}

/* ===== Hero ===== */
.hero {
  position: relative; z-index: 1;
  min-height: 100vh; display: flex; flex-direction: column;
  align-items: center; justify-content: center;
  padding: 120px 0 80px; text-align: center;
}
.hero-badge {
  display: inline-block; padding: 6px 18px;
  background: rgba(59, 130, 246, 0.1);
  border: 1px solid var(--border);
  border-radius: 100px; font-size: 0.85rem;
  color: var(--accent-blue-light); font-weight: 500;
  margin-bottom: 24px;
}
.hero-title {
  font-family: var(--font-display);
  font-size: clamp(2.8rem, 6vw, 4.5rem);
  font-weight: 800; letter-spacing: -2px;
  line-height: 1.1; margin-bottom: 12px;
}
.gradient-text {
  background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero-subtitle {
  font-size: clamp(1.1rem, 2.5vw, 1.5rem);
  color: var(--accent-amber); font-weight: 600;
  margin-bottom: 16px;
}
.hero-tagline {
  max-width: 640px; margin: 0 auto 36px;
  color: var(--text-secondary); font-size: 1.05rem; line-height: 1.8;
}
.hero-actions {
  display: flex; flex-wrap: wrap; gap: 12px;
  justify-content: center; margin-bottom: 56px;
}

/* ===== Buttons ===== */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 12px 24px; border-radius: 10px;
  font-size: 0.95rem; font-weight: 600;
  border: none; cursor: pointer;
  transition: all var(--transition);
}
.btn-primary {
  background: linear-gradient(135deg, var(--accent-blue), #6366f1);
  color: white; box-shadow: 0 4px 16px rgba(59, 130, 246, 0.3);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 24px rgba(59, 130, 246, 0.4);
  color: white;
}
.btn-secondary {
  background: rgba(59, 130, 246, 0.1);
  color: var(--accent-blue-light);
  border: 1px solid var(--border);
}
.btn-secondary:hover {
  background: rgba(59, 130, 246, 0.2);
  border-color: var(--border-hover);
  color: var(--accent-blue-light);
}
.btn-ghost {
  background: transparent; color: var(--text-secondary);
  border: 1px solid rgba(148, 163, 184, 0.2);
}
.btn-ghost:hover { color: var(--text-primary); border-color: var(--text-secondary); }
.btn-large { padding: 16px 32px; font-size: 1rem; }

/* ===== Hero Stats ===== */
.hero-stats {
  display: flex; align-items: center; justify-content: center;
  gap: 32px; flex-wrap: wrap;
  padding: 28px 40px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(12px);
}
.stat { text-align: center; }
.stat-number {
  font-family: var(--font-display);
  font-size: 2.2rem; font-weight: 800;
  color: var(--accent-blue-light);
}
.stat-suffix {
  font-family: var(--font-display);
  font-size: 1.4rem; font-weight: 700;
  color: var(--accent-blue-light);
}
.stat-label {
  display: block; font-size: 0.8rem;
  color: var(--text-muted); margin-top: 4px;
  text-transform: uppercase; letter-spacing: 0.5px;
}
.stat-divider {
  width: 1px; height: 48px;
  background: var(--border);
}

/* ===== Hero Scroll ===== */
.hero-scroll {
  position: absolute; bottom: 32px; left: 50%;
  transform: translateX(-50%);
  animation: bounce 2s infinite;
}
.hero-scroll a { color: var(--text-muted); }
@keyframes bounce {
  0%, 100% { transform: translateX(-50%) translateY(0); }
  50% { transform: translateX(-50%) translateY(8px); }
}

/* ===== Sections ===== */
.section {
  position: relative; z-index: 1;
  padding: 100px 0;
}
.section-alt { background: rgba(17, 24, 39, 0.4); }
.section-header { margin-bottom: 56px; }
.section-tag {
  display: inline-block; font-size: 0.85rem; font-weight: 600;
  color: var(--accent-blue); text-transform: uppercase;
  letter-spacing: 1.5px; margin-bottom: 12px;
}
.section-title {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 800; letter-spacing: -1px; line-height: 1.2;
}

/* ===== About ===== */
.about-grid {
  display: grid; grid-template-columns: 1.4fr 1fr;
  gap: 48px; align-items: start;
}
.about-text p {
  color: var(--text-secondary); margin-bottom: 16px; font-size: 1.02rem;
}
.about-text strong { color: var(--text-primary); }
.about-highlights {
  display: grid; grid-template-columns: 1fr 1fr;
  gap: 16px; margin-top: 32px;
}
.highlight-card {
  display: flex; gap: 14px; padding: 18px;
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius); transition: all var(--transition);
}
.highlight-card:hover {
  border-color: var(--border-hover);
  transform: translateY(-2px);
}
.highlight-icon { font-size: 1.5rem; flex-shrink: 0; }
.highlight-card h4 {
  font-size: 0.95rem; font-weight: 600; margin-bottom: 4px;
}
.highlight-card p { font-size: 0.82rem; color: var(--text-muted); margin: 0; }
.info-card {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius-lg); padding: 28px;
  backdrop-filter: blur(12px); margin-bottom: 20px;
}
.info-card h3 {
  font-size: 1.1rem; font-weight: 700;
  margin-bottom: 20px; color: var(--accent-blue-light);
}
.info-list li {
  display: flex; flex-direction: column; gap: 2px;
  padding: 10px 0; border-bottom: 1px solid rgba(59, 130, 246, 0.08);
}
.info-list li:last-child { border-bottom: none; }
.info-label {
  font-size: 0.75rem; text-transform: uppercase;
  letter-spacing: 0.5px; color: var(--text-muted); font-weight: 500;
}
.info-value { font-size: 0.95rem; color: var(--text-primary); }
.edu-item { margin-bottom: 16px; }
.edu-item:last-child { margin-bottom: 0; }
.edu-degree { font-weight: 600; font-size: 0.95rem; }
.edu-school { font-size: 0.85rem; color: var(--text-muted); margin-top: 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-blue), var(--gradient-end), transparent);
}
.timeline-item { position: relative; margin-bottom: 40px; }
.timeline-item:last-child { margin-bottom: 0; }
.timeline-marker {
  position: absolute; left: -32px; top: 8px;
  width: 16px; height: 16px; border-radius: 50%;
  background: var(--bg-primary); border: 3px solid var(--accent-blue);
  z-index: 1;
}
.timeline-marker.current {
  background: var(--accent-blue);
  box-shadow: 0 0 12px rgba(59, 130, 246, 0.5);
}
.timeline-content {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius-lg); padding: 28px;
  transition: all var(--transition);
}
.timeline-content:hover {
  border-color: var(--border-hover);
  box-shadow: var(--shadow);
}
.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: 1.15rem; font-weight: 700; }
.timeline-company { color: var(--text-muted); font-size: 0.9rem; margin-top: 2px; }
.timeline-date {
  font-size: 0.82rem; font-weight: 600; color: var(--accent-amber);
  background: rgba(245, 158, 11, 0.1);
  padding: 4px 12px; border-radius: 100px;
  white-space: nowrap;
}
.timeline-bullets { margin-bottom: 16px; }
.timeline-bullets li {
  position: relative; padding-left: 20px;
  color: var(--text-secondary); font-size: 0.92rem;
  margin-bottom: 8px;
}
.timeline-bullets li::before {
  content: '▸'; position: absolute; left: 0;
  color: var(--accent-blue); font-weight: bold;
}
.timeline-tags, .project-tags {
  display: flex; flex-wrap: wrap; gap: 8px;
}
.timeline-tags span, .project-tags span {
  font-size: 0.75rem; font-weight: 500;
  padding: 4px 12px; border-radius: 100px;
  background: rgba(59, 130, 246, 0.1);
  color: var(--accent-blue-light);
  border: 1px solid rgba(59, 130, 246, 0.15);
}

/* ===== Projects ===== */
.projects-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(360px, 1fr));
  gap: 24px;
}
.project-card {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius-lg); padding: 28px;
  transition: all var(--transition);
  display: flex; flex-direction: column;
}
.project-card:hover {
  border-color: var(--border-hover);
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}
.project-card.featured {
  grid-column: 1 / -1;
  background: linear-gradient(135deg, rgba(59, 130, 246, 0.08), rgba(139, 92, 246, 0.06));
  border-color: rgba(59, 130, 246, 0.25);
}
.project-card.tech {
  border-color: rgba(245, 158, 11, 0.2);
}
.project-icon { font-size: 2rem; margin-bottom: 12px; }
.project-meta {
  display: flex; align-items: center; gap: 10px; margin-bottom: 12px;
}
.project-period {
  font-size: 0.8rem; color: var(--text-muted); font-weight: 500;
}
.project-badge {
  font-size: 0.7rem; font-weight: 600; text-transform: uppercase;
  letter-spacing: 0.5px; padding: 3px 10px; border-radius: 100px;
  background: rgba(59, 130, 246, 0.15); color: var(--accent-blue-light);
}
.project-badge.tech-badge {
  background: rgba(245, 158, 11, 0.15); color: var(--accent-amber);
}
.project-card h3 {
  font-size: 1.15rem; font-weight: 700; margin-bottom: 10px;
}
.project-card > p {
  color: var(--text-secondary); font-size: 0.92rem;
  margin-bottom: 14px; flex-grow: 1;
}
.project-highlights { margin-bottom: 16px; }
.project-highlights li {
  position: relative; padding-left: 18px;
  color: var(--text-muted); font-size: 0.85rem; margin-bottom: 6px;
}
.project-highlights li::before {
  content: '✓'; position: absolute; left: 0;
  color: var(--accent-blue); font-weight: bold; font-size: 0.8rem;
}

/* ===== Skills ===== */
.skills-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 20px;
}
.skill-category {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius-lg); padding: 24px;
  transition: all var(--transition);
}
.skill-category:hover { border-color: var(--border-hover); }
.skill-category-header {
  display: flex; align-items: center; gap: 12px; margin-bottom: 16px;
}
.skill-icon { font-size: 1.5rem; }
.skill-category h3 { font-size: 1rem; font-weight: 700; }
.skill-pills { display: flex; flex-wrap: wrap; gap: 8px; }
.skill-pills span {
  font-size: 0.8rem; padding: 6px 14px;
  border-radius: 100px; font-weight: 500;
  background: rgba(59, 130, 246, 0.08);
  color: var(--text-secondary);
  border: 1px solid rgba(59, 130, 246, 0.1);
  transition: all var(--transition);
}
.skill-pills span:hover {
  background: rgba(59, 130, 246, 0.15);
  color: var(--accent-blue-light);
  border-color: rgba(59, 130, 246, 0.25);
}

/* ===== Certifications ===== */
.certs-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 20px;
}
.cert-card {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius-lg); padding: 28px;
  text-align: center; transition: all var(--transition);
}
.cert-card:hover {
  border-color: var(--border-hover);
  transform: translateY(-3px);
  box-shadow: var(--shadow);
}
.cert-icon { font-size: 2.2rem; margin-bottom: 14px; }
.cert-card h3 { font-size: 0.95rem; font-weight: 700; margin-bottom: 6px; }
.cert-card p { font-size: 0.82rem; color: var(--text-muted); }

/* ===== Impact ===== */
.impact-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 20px;
}
.impact-card {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius-lg); padding: 32px;
  text-align: center; transition: all var(--transition);
}
.impact-card:hover {
  border-color: var(--border-hover);
  transform: translateY(-3px);
}
.impact-number {
  font-family: var(--font-display);
  font-size: 2.5rem; font-weight: 800;
  background: linear-gradient(135deg, var(--accent-blue), var(--accent-amber));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text; margin-bottom: 8px;
}
.impact-card h3 { font-size: 1rem; font-weight: 700; margin-bottom: 8px; }
.impact-card p { font-size: 0.85rem; color: var(--text-muted); }

/* ===== Contact ===== */
.contact-section { padding-bottom: 60px; }
.contact-card {
  background: linear-gradient(135deg, rgba(59, 130, 246, 0.08), rgba(139, 92, 246, 0.06));
  border: 1px solid var(--border);
  border-radius: var(--radius-lg); padding: 48px;
  display: grid; grid-template-columns: 1.5fr 1fr;
  gap: 40px; align-items: center;
}
.contact-content p {
  color: var(--text-secondary); margin: 16px 0 28px; font-size: 1.02rem;
}
.contact-methods {
  display: grid; grid-template-columns: 1fr 1fr; gap: 16px;
}
.contact-method {
  display: flex; align-items: center; gap: 14px;
  padding: 14px; border-radius: var(--radius);
  background: rgba(10, 15, 30, 0.5);
  border: 1px solid rgba(59, 130, 246, 0.08);
  transition: all var(--transition); color: inherit;
}
.contact-method:hover {
  border-color: var(--border-hover);
  background: rgba(10, 15, 30, 0.7);
  color: inherit;
}
.contact-method svg { flex-shrink: 0; color: var(--accent-blue); }
.contact-label {
  display: block; font-size: 0.72rem; text-transform: uppercase;
  letter-spacing: 0.5px; color: var(--text-muted); font-weight: 500;
}
.contact-value { font-size: 0.9rem; color: var(--text-primary); font-weight: 500; }
.contact-cta {
  display: flex; flex-direction: column; gap: 12px;
  align-items: stretch;
}

/* ===== Footer ===== */
.footer {
  position: relative; z-index: 1;
  border-top: 1px solid var(--border);
  padding: 40px 0;
}
.footer-inner {
  display: flex; flex-wrap: wrap; align-items: center;
  justify-content: space-between; gap: 20px;
}
.footer-brand p { font-size: 0.85rem; color: var(--text-muted); margin-top: 4px; }
.footer-links { display: flex; gap: 20px; }
.footer-links a { color: var(--text-muted); font-size: 0.85rem; }
.footer-links a:hover { color: var(--text-primary); }
.footer-copy { font-size: 0.8rem; color: var(--text-muted); width: 100%; text-align: center; margin-top: 12px; }

/* ===== Animations ===== */
.fade-up {
  opacity: 0; transform: translateY(24px);
  animation: fadeUp 0.7s ease forwards;
}
.fade-up:nth-child(2) { animation-delay: 0.1s; }
.fade-up:nth-child(3) { animation-delay: 0.2s; }
.fade-up:nth-child(4) { animation-delay: 0.3s; }
.fade-up:nth-child(5) { animation-delay: 0.4s; }
.fade-up:nth-child(6) { animation-delay: 0.5s; }
@keyframes fadeUp {
  to { opacity: 1; transform: translateY(0); }
}
.reveal {
  opacity: 0; transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.reveal.visible { opacity: 1; transform: translateY(0); }

/* ===== Responsive ===== */
@media (max-width: 900px) {
  .about-grid { grid-template-columns: 1fr; }
  .about-highlights { grid-template-columns: 1fr; }
  .contact-card { grid-template-columns: 1fr; }
  .projects-grid { grid-template-columns: 1fr; }
  .project-card.featured { grid-column: auto; }
  .hero-stats { gap: 20px; padding: 20px 24px; }
  .stat-divider { display: none; }
  .hero-stats { display: grid; grid-template-columns: 1fr 1fr; }
}
@media (max-width: 768px) {
  .nav-toggle { display: flex; }
  .nav-links {
    position: fixed; top: 72px; left: 0; right: 0;
    background: rgba(10, 15, 30, 0.95);
    backdrop-filter: blur(20px);
    flex-direction: column; padding: 20px;
    border-bottom: 1px solid var(--border);
    transform: translateY(-120%); transition: transform var(--transition);
  }
  .nav-links.open { transform: translateY(0); }
  .nav-links a { width: 100%; text-align: center; padding: 12px; }
  .timeline-header { flex-direction: column; }
  .contact-methods { grid-template-columns: 1fr; }
  .skills-grid { grid-template-columns: 1fr; }
  .footer-inner { flex-direction: column; text-align: center; }
  .footer-links { justify-content: center; }
}
@media (max-width: 480px) {
  .hero-actions { flex-direction: column; align-items: stretch; }
  .btn { justify-content: center; }
  .hero-stats { grid-template-columns: 1fr; }
}