:root {
  --bg-primary: #07111f;
  --bg-secondary: #0d1728;
  --text-primary: #f2f6ff;
  --text-secondary: #9db2d1;
  --accent: #4a90e2;
  --accent-2: #58c2ff;
  --border: rgba(255, 255, 255, 0.12);
  --card-bg: rgba(255, 255, 255, 0.06);
  --shadow: 0 16px 45px rgba(0, 0, 0, 0.28);
}

body.light {
  --bg-primary: #f5f9ff;
  --bg-secondary: #eef4ff;
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --accent: #2563eb;
  --accent-2: #38bdf8;
  --border: rgba(15, 23, 42, 0.08);
  --card-bg: rgba(255, 255, 255, 0.82);
  --shadow: 0 16px 45px rgba(37, 99, 235, 0.12);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: 'Inter', sans-serif;
  background: radial-gradient(circle at top left, rgba(74, 144, 226, 0.18), transparent 30%), var(--bg-primary);
  color: var(--text-primary);
  overflow-x: hidden;
  transition: background 0.35s ease, color 0.35s ease;
}

body::before {
  content: '';
  position: fixed;
  inset: 0;
  background: linear-gradient(135deg, rgba(74, 144, 226, 0.08), transparent 70%);
  pointer-events: none;
}

img {
  max-width: 100%;
  display: block;
}

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

section {
  position: relative;
}

.section-padding {
  padding: 100px 0;
}

.bg-soft {
  background: rgba(255, 255, 255, 0.03);
}

.glass-nav,
.glass-card,
.contact-form,
.resume-card {
  background: var(--card-bg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
}

.glass-nav {
  padding: 1rem 0;
}

.navbar-brand {
  font-size: 1.1rem;
  letter-spacing: 0.03em;
}

.navbar-brand span {
  color: var(--accent-2);
}

.nav-link {
  color: var(--text-primary) !important;
  margin: 0 0.4rem;
  position: relative;
}

.nav-link::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: -4px;
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  transition: width 0.3s ease;
}

.nav-link:hover::after,
.nav-link.active::after {
  width: 100%;
}

.theme-toggle {
  border: 1px solid var(--border);
  background: rgba(255,255,255,0.08);
  color: var(--text-primary);
  border-radius: 50%;
  width: 42px;
  height: 42px;
}

.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: 120px;
}

.eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.3em;
  font-size: 0.8rem;
  color: var(--accent-2);
  font-weight: 700;
}

.hero h1 {
  font-size: clamp(2.2rem, 5vw, 4.5rem);
  margin-bottom: 0.75rem;
}

.typed-text {
  font-size: clamp(1.2rem, 2.3vw, 1.8rem);
  min-height: 2rem;
  color: var(--accent-2);
  font-weight: 600;
}

.hero-description {
  max-width: 650px;
  color: var(--text-secondary);
  font-size: 1.05rem;
  line-height: 1.8;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-top: 2rem;
}

.btn {
  border-radius: 999px;
  padding: 0.85rem 1.45rem;
  font-weight: 600;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.btn:hover {
  transform: translateY(-2px);
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  border: none;
  color: white;
}

.btn-outline-light,
.btn-outline-primary {
  border-color: var(--border);
}

.social-links a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  margin-right: 0.7rem;
  border-radius: 50%;
  background: rgba(255,255,255,0.08);
  color: var(--text-primary);
  transition: transform 0.2s ease, background 0.3s ease;
}

.social-links a:hover {
  transform: translateY(-3px);
  background: var(--accent);
}

.hero-card, .about-image, .skill-card, .timeline-card, .project-card, .cert-card, .contact-card, .resume-card, .contact-form {
  border-radius: 1.5rem;
  padding: 1.5rem;
}

.hero-card {
  padding: 1rem;
}

.section-heading {
  margin-bottom: 1.5rem;
}

.section-title {
  font-size: clamp(1.75rem, 3vw, 2.5rem);
  font-weight: 700;
}

.lead {
  color: var(--text-primary);
  font-size: 1.08rem;
  line-height: 1.8;
}

.info-pill {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  background: rgba(255,255,255,0.06);
  border: 1px solid var(--border);
  padding: 0.85rem 1rem;
  border-radius: 999px;
  color: var(--text-secondary);
}

.skill-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.skill-list li {
  display: inline-block;
  margin: 0.35rem 0.35rem 0 0;
  padding: 0.45rem 0.8rem;
  border-radius: 999px;
  background: rgba(74, 144, 226, 0.16);
  color: var(--text-primary);
  font-size: 0.94rem;
}

.timeline {
  position: relative;
  padding-left: 1rem;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 0.6rem;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(180deg, var(--accent), transparent);
}

.timeline-item {
  position: relative;
  margin-bottom: 1.8rem;
  padding-left: 2rem;
}

.timeline-dot {
  position: absolute;
  left: 0;
  top: 0.3rem;
  width: 1.25rem;
  height: 1.25rem;
  border-radius: 50%;
  background: var(--accent-2);
  box-shadow: 0 0 0 6px rgba(88, 194, 255, 0.2);
}

.company {
  font-weight: 700;
  margin-bottom: 0.25rem;
}

.text-muted {
  color: var(--text-secondary);
  margin-bottom: 0.75rem;
}

.filter-group {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
  justify-content: center;
}

.filter-btn {
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text-primary);
  border-radius: 999px;
  padding: 0.6rem 1rem;
}

.filter-btn.active,
.filter-btn:hover {
  background: var(--accent);
  border-color: var(--accent);
}

.tech-stack span,
.badge {
  display: inline-block;
  margin: 0.35rem 0.35rem 0 0;
  padding: 0.45rem 0.8rem;
  border-radius: 999px;
  background: rgba(255,255,255,0.08);
  font-size: 0.9rem;
}

.cert-card .badge {
  margin-top: 1rem;
}

.contact-list {
  list-style: none;
  padding: 0;
  margin-top: 1.3rem;
}

.contact-list li {
  margin-bottom: 0.7rem;
  color: var(--text-secondary);
}

.contact-list i {
  color: var(--accent-2);
  margin-right: 0.65rem;
}

.form-control {
  background: rgba(255,255,255,0.06);
  border: 1px solid var(--border);
  color: var(--text-primary);
}

.form-control:focus {
  background: rgba(255,255,255,0.08);
  color: var(--text-primary);
  box-shadow: 0 0 0 0.2rem rgba(74, 144, 226, 0.25);
  border-color: var(--accent);
}

.form-message {
  min-height: 1.2rem;
  color: var(--accent-2);
  font-weight: 600;
}

.footer {
  padding: 2rem 0 4rem;
  position: relative;
}

.back-to-top {
  position: fixed;
  right: 1.3rem;
  bottom: 1.3rem;
  border: none;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: white;
  display: none;
  z-index: 1000;
  box-shadow: var(--shadow);
}

.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 3px;
  width: 0;
  z-index: 1100;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
}

.loader {
  position: fixed;
  inset: 0;
  display: grid;
  place-items: center;
  background: var(--bg-primary);
  z-index: 1200;
  transition: opacity 0.4s ease;
}

.loader-ring {
  width: 60px;
  height: 60px;
  border: 4px solid rgba(255,255,255,0.15);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

#particlesCanvas {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: -1;
  opacity: 0.5;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

@media (max-width: 991px) {
  .hero {
    padding-top: 60px;
  }
  .section-padding {
    padding: 80px 0;
  }
}

@media (max-width: 768px) {
  .hero-actions {
    flex-direction: column;
    align-items: flex-start;
  }
  .hero-card {
    margin-top: 2rem;
  }
  .timeline {
    padding-left: 0.35rem;
  }
}