:root {
  --bg: #060816;
  --bg-2: #11162c;
  --card: rgba(12, 18, 40, 0.8);
  --card-strong: rgba(16, 25, 55, 0.95);
  --text: #eef2ff;
  --muted: #9aa7c7;
  --accent: #3dd9ff;
  --accent-2: #9b5cff;
  --border: rgba(255,255,255,0.12);
  --shadow: 0 20px 60px rgba(0,0,0,0.35);
}

body[data-theme="light"] {
  --bg: #f4f7ff;
  --bg-2: #eef3ff;
  --card: rgba(255,255,255,0.75);
  --card-strong: rgba(255,255,255,0.95);
  --text: #07111f;
  --muted: #4c5a78;
  --accent: #2563eb;
  --accent-2: #7c3aed;
  --border: rgba(0,0,0,0.08);
  --shadow: 0 20px 60px rgba(39, 63, 120, 0.15);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: Inter, "Segoe UI", Roboto, sans-serif;
  color: var(--text);
  background: radial-gradient(circle at top left, rgba(61,217,255,0.16), transparent 30%),
              radial-gradient(circle at 90% 10%, rgba(155,92,255,0.16), transparent 25%),
              linear-gradient(135deg, var(--bg), var(--bg-2));
  line-height: 1.7;
  overflow-x: hidden;
  transition: background 0.4s ease, color 0.4s ease;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  background-image: linear-gradient(rgba(255,255,255,0.03) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,0.03) 1px, transparent 1px);
  background-size: 28px 28px;
  opacity: 0.35;
  pointer-events: none;
  mix-blend-mode: overlay;
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
button, input, textarea { font: inherit; }

.container {
  width: min(1160px, calc(100% - 2rem));
  margin: 0 auto;
}

.section {
  padding: 5rem 0;
  position: relative;
}

.section-heading {
  max-width: 760px;
  margin-bottom: 2rem;
}

.eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.35em;
  color: var(--accent);
  font-size: 0.77rem;
  font-weight: 700;
  margin-bottom: 0.7rem;
}

.section-heading h3 {
  margin: 0 0 0.5rem;
  font-size: clamp(1.6rem, 3vw, 2.3rem);
}

.section-heading p {
  margin: 0;
  color: var(--muted);
}

.glass {
  background: var(--card);
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
}

.card {
  border-radius: 24px;
  padding: 1.4rem;
  position: relative;
  overflow: hidden;
  transition: transform 0.3s ease, border-color 0.3s ease;
}

.card:hover { transform: translateY(-4px); border-color: rgba(61,217,255,0.4); }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.9rem 1.45rem;
  border-radius: 999px;
  font-weight: 700;
  border: 0;
  cursor: pointer;
  position: relative;
  overflow: hidden;
  transition: transform 0.25s ease, box-shadow 0.25s ease;
  isolation: isolate;
}

.btn:hover { transform: translateY(-2px); }
.btn-primary {
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  color: white;
  box-shadow: 0 12px 30px rgba(61,217,255,0.25);
}
.btn-secondary {
  background: rgba(255,255,255,0.08);
  color: var(--text);
  border: 1px solid var(--border);
}

.ripple {
  position: absolute;
  inset: 0;
  border-radius: inherit;
  background: rgba(255,255,255,0.24);
  transform: scale(0);
  opacity: 0;
  animation: ripple 0.65s linear;
  pointer-events: none;
}

@keyframes ripple {
  to { transform: scale(2.5); opacity: 0; }
}

.scroll-progress {
  position: fixed;
  inset: 0 0 auto 0;
  height: 3px;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  transform-origin: left center;
  transform: scaleX(0);
  z-index: 999;
}

.loader {
  position: fixed;
  inset: 0;
  background: rgba(6,8,22,0.95);
  display: grid;
  place-items: center;
  z-index: 1000;
  transition: opacity 0.5s ease, visibility 0.5s ease;
}

.loader.hidden { opacity: 0; visibility: hidden; }

.loader-ring {
  width: 64px;
  height: 64px;
  border: 3px solid transparent;
  border-top-color: var(--accent);
  border-right-color: var(--accent-2);
  border-radius: 50%;
  animation: spin 0.9s linear infinite;
}

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

.cursor-glow {
  position: fixed;
  width: 220px;
  height: 220px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(61,217,255,0.16), transparent 68%);
  pointer-events: none;
  transform: translate(-50%, -50%);
  z-index: 0;
  mix-blend-mode: screen;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 200;
  background: rgba(6,8,22,0.66);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
}

body[data-theme="light"] .site-header { background: rgba(244,247,255,0.8); }

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 0;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  font-weight: 800;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  font-size: 0.95rem;
}

.brand span {
  display: inline-grid;
  place-items: center;
  width: 34px;
  height: 34px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: white;
  box-shadow: 0 8px 24px rgba(61,217,255,0.3);
}

.nav-links {
  display: flex;
  gap: 1.1rem;
  color: var(--muted);
  align-items: center;
}

.nav-links a {
  position: relative;
  padding: 0.3rem 0;
}

.nav-links a::after {
  content: "";
  position: absolute;
  inset: auto 0 -6px 0;
  height: 2px;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.25s ease;
}

.nav-links a:hover::after,
.nav-links a.active::after { transform: scaleX(1); }

.header-actions {
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.theme-toggle,
.menu-toggle {
  border: 0;
  width: 42px;
  height: 42px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  cursor: pointer;
  color: var(--text);
  background: rgba(255,255,255,0.08);
  border: 1px solid var(--border);
}

.hero {
  min-height: 100vh;
  display: grid;
  align-items: center;
  padding-top: 3rem;
  padding-bottom: 3rem;
  position: relative;
}

.hero::before,
.hero::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.hero::before {
  background: radial-gradient(circle at 20% 20%, rgba(61,217,255,0.22), transparent 22%),
              radial-gradient(circle at 85% 25%, rgba(155,92,255,0.2), transparent 25%);
  filter: blur(12px);
}

.hero-grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 2rem;
  align-items: center;
}

.hero-copy h1 {
  font-size: clamp(2.4rem, 5vw, 5rem);
  margin: 0 0 0.4rem;
  line-height: 1.05;
}

.hero-copy h2 {
  margin: 0 0 0.8rem;
  color: var(--accent);
  font-size: clamp(1.1rem, 2.4vw, 1.8rem);
}

.hero-copy .intro {
  font-size: 1.05rem;
  color: var(--muted);
  max-width: 640px;
  margin-bottom: 1.2rem;
}

.typing-line {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  min-height: 2.8rem;
  font-size: 1rem;
  color: #cdefff;
  margin-bottom: 1.5rem;
}

.cursor {
  animation: blink 0.8s steps(2, start) infinite;
  color: var(--accent);
}

@keyframes blink { to { opacity: 0; } }

.cta-group {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-bottom: 1.4rem;
}

.social-row {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.social-row a {
  width: 42px;
  height: 42px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: rgba(255,255,255,0.08);
  border: 1px solid var(--border);
  transition: transform 0.2s ease, background 0.2s ease;
}

.social-row a:hover { transform: translateY(-2px); background: rgba(61,217,255,0.16); }

.hero-card {
  position: relative;
  padding: 1rem;
  border-radius: 32px;
  background: linear-gradient(145deg, rgba(61,217,255,0.14), rgba(155,92,255,0.12));
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  overflow: hidden;
  transform: perspective(1000px) rotateY(-8deg);
  animation: float 4s ease-in-out infinite;
}

.hero-card img {
  border-radius: 24px;
  min-height: 460px;
  object-fit: cover;
  width: 100%;
  filter: saturate(1.12) contrast(1.05);
}

.floating-badge {
  position: absolute;
  left: 1.2rem;
  bottom: 1.2rem;
  padding: 0.7rem 1rem;
  border-radius: 999px;
  font-size: 0.9rem;
  background: rgba(6,8,22,0.75);
  border: 1px solid rgba(255,255,255,0.14);
  backdrop-filter: blur(10px);
}

@keyframes float {
  0%, 100% { transform: perspective(1000px) rotateY(-8deg) translateY(0); }
  50% { transform: perspective(1000px) rotateY(-8deg) translateY(-8px); }
}

.about-grid,
.timeline-grid,
.service-grid,
.cert-grid,
.testimonial-carousel {
  display: grid;
  gap: 1.25rem;
}

.about-grid {
  grid-template-columns: 1.1fr 0.9fr;
}

.about-list {
  display: grid;
  gap: 1rem;
}

.detail-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-bottom: 0.6rem;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}

.detail-row span:last-child { color: var(--muted); }

.skills-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 1.25rem;
}

.skill-item + .skill-item { margin-top: 1rem; }

.skill-head {
  display: flex;
  justify-content: space-between;
  font-size: 0.95rem;
  margin-bottom: 0.45rem;
}

.bar {
  height: 10px;
  border-radius: 999px;
  background: rgba(255,255,255,0.08);
  overflow: hidden;
}

.bar span {
  display: block;
  height: 100%;
  width: 0;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  border-radius: inherit;
  transition: width 1.2s ease;
}

.filter-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
  margin-bottom: 1.4rem;
}

.filter-btn {
  border: 1px solid var(--border);
  background: transparent;
  color: var(--muted);
  padding: 0.65rem 1rem;
  border-radius: 999px;
  cursor: pointer;
  transition: all 0.2s ease;
}

.filter-btn.active,
.filter-btn:hover {
  color: white;
  border-color: transparent;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
}

.project-grid,
.github-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1.2rem;
}

.project-card {
  padding: 0;
  display: flex;
  flex-direction: column;
  min-height: 100%;
}

.project-card img {
  width: 100%;
  height: 190px;
  object-fit: cover;
}

.project-info {
  padding: 1.2rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  flex: 1;
}

.project-info h4 { margin: 0; font-size: 1.08rem; }
.project-info p { margin: 0; color: var(--muted); font-size: 0.95rem; }

.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
}

.tag-list span {
  display: inline-flex;
  align-items: center;
  padding: 0.35rem 0.7rem;
  border-radius: 999px;
  font-size: 0.78rem;
  background: rgba(61,217,255,0.12);
  color: #bfeeff;
}

.project-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
  margin-top: auto;
}

.project-actions a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.62rem 0.9rem;
  border-radius: 999px;
  border: 1px solid var(--border);
  color: var(--text);
  font-size: 0.9rem;
}

.project-actions a:hover { background: rgba(61,217,255,0.12); }

.timeline-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.timeline-item {
  position: relative;
  padding-left: 1.25rem;
  border-left: 2px solid rgba(61,217,255,0.3);
}

.timeline-item::before {
  content: "";
  position: absolute;
  left: -7px;
  top: 0.2rem;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  box-shadow: 0 0 0 4px rgba(61,217,255,0.16);
}

.timeline-item h4 { margin: 0 0 0.2rem; }
.timeline-item .meta { color: var(--accent); font-size: 0.9rem; }
.timeline-item p { color: var(--muted); margin-top: 0.5rem; }

.service-grid,
.cert-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.service-card,
.cert-card {
  text-align: left;
}

.service-icon,
.cert-icon {
  width: 54px;
  height: 54px;
  border-radius: 16px;
  display: grid;
  place-items: center;
  margin-bottom: 0.95rem;
  font-size: 1.3rem;
  color: white;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1rem;
}

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

.stat-number {
  font-size: clamp(1.8rem, 3vw, 2.4rem);
  font-weight: 800;
  margin-bottom: 0.25rem;
}

.stat-label {
  color: var(--muted);
  font-size: 0.95rem;
}

.testimonial-carousel {
  position: relative;
  min-height: 240px;
}

.testimonial-item {
  display: none;
}

.testimonial-item.active { display: block; }

.testimonial-item blockquote {
  margin: 0;
  font-size: 1.05rem;
  color: var(--text);
}

.testimonial-nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 1.1rem;
}

.testimonial-nav button {
  border: 1px solid var(--border);
  background: rgba(255,255,255,0.08);
  color: var(--text);
  width: 42px;
  height: 42px;
  border-radius: 50%;
  cursor: pointer;
}

.contact-grid {
  display: grid;
  grid-template-columns: 0.95fr 1.05fr;
  gap: 1.2rem;
}

.contact-card ul {
  list-style: none;
  padding: 0;
  margin: 1rem 0 0;
  display: grid;
  gap: 0.75rem;
}

.contact-card li {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  color: var(--muted);
}

form {
  display: grid;
  gap: 0.9rem;
}

input, textarea {
  width: 100%;
  padding: 0.85rem 1rem;
  border-radius: 14px;
  border: 1px solid var(--border);
  background: rgba(255,255,255,0.06);
  color: var(--text);
  outline: none;
}

input:focus, textarea:focus { border-color: rgba(61,217,255,0.4); box-shadow: 0 0 0 4px rgba(61,217,255,0.15); }

.form-status {
  min-height: 1.2rem;
  color: var(--accent);
  font-size: 0.95rem;
}

.site-footer {
  padding: 2rem 0 3rem;
  border-top: 1px solid var(--border);
  color: var(--muted);
}

.site-footer .container {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  align-items: center;
  flex-wrap: wrap;
}

.footer-links {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.back-top {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: rgba(255,255,255,0.08);
  border: 1px solid var(--border);
}

.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.reveal.visible { opacity: 1; transform: translateY(0); }

@media (max-width: 980px) {
  .hero-grid,
  .about-grid,
  .skills-grid,
  .contact-grid,
  .project-grid,
  .github-grid,
  .service-grid,
  .cert-grid,
  .timeline-grid,
  .stats-grid {
    grid-template-columns: 1fr;
  }
  .hero-card { transform: none; animation: none; }
}

@media (max-width: 760px) {
  .site-header .container { padding: 0.85rem 0; }
  .nav-links {
    position: absolute;
    top: 100%;
    left: 1rem;
    right: 1rem;
    flex-direction: column;
    align-items: flex-start;
    background: var(--card-strong);
    border: 1px solid var(--border);
    padding: 1rem;
    border-radius: 18px;
    display: none;
  }
  .nav-links.open { display: flex; }
  .menu-toggle { display: grid; }
  .hero { padding-top: 2rem; }
  .hero-copy h1 { font-size: 2.5rem; }
}

@media (min-width: 761px) {
  .menu-toggle { display: none; }
}