/* ===== CSS Variables ===== */
:root {
  --color-bg-deep:       #020818;
  --color-bg-card:       #0d1f3c;
  --color-nebula-purple: #2d1b69;
  --color-accent-gold:   #f0c040;
  --color-accent-cyan:   #4fc3f7;
  --color-text-primary:  #e8eaf6;
  --color-text-secondary:#9fa8da;
  --color-border:        rgba(79, 195, 247, 0.15);
  --font-display: 'Cormorant Garamond', Georgia, serif;
  --font-body:    'Inter', system-ui, sans-serif;
  --font-mono:    'JetBrains Mono', 'Fira Code', monospace;
  --max-width: 1100px;
  --section-pad: 7rem 1.5rem;
}

/* ===== Scroll Progress Bar ===== */
#scroll-progress {
  position: fixed;
  top: 0; left: 0;
  height: 2px;
  width: 0%;
  background: linear-gradient(90deg, var(--color-accent-cyan), var(--color-accent-gold));
  z-index: 200;
  transition: width 0.1s linear;
}

/* ===== Nav Active Link ===== */
.nav-links a.active {
  color: var(--color-accent-cyan);
}

/* ===== Card Tilt ===== */
.project-card, .skill-card {
  transform-style: preserve-3d;
  will-change: transform;
}

/* ===== Reset ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  background: var(--color-bg-deep);
  color: var(--color-text-primary);
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.7;
  overflow-x: hidden;
}
a { color: inherit; text-decoration: none; }
ul { list-style: none; }
img { display: block; max-width: 100%; }

/* ===== Canvas & Nebula Background ===== */
#starfield {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
}

.nebula-layer {
  position: fixed;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  overflow: hidden;
}

.nebula {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  animation: nebulaPulse 8s ease-in-out infinite;
}

.nebula-1 {
  width: 600px; height: 600px;
  background: radial-gradient(circle, rgba(45,27,105,0.5) 0%, transparent 70%);
  top: -150px; left: -100px;
  animation-delay: 0s;
}

.nebula-2 {
  width: 500px; height: 500px;
  background: radial-gradient(circle, rgba(79,195,247,0.15) 0%, transparent 70%);
  top: 40%; right: -100px;
  animation-delay: -3s;
}

.nebula-3 {
  width: 700px; height: 700px;
  background: radial-gradient(circle, rgba(45,27,105,0.3) 0%, transparent 70%);
  bottom: -200px; left: 30%;
  animation-delay: -5s;
}

@keyframes nebulaPulse {
  0%, 100% { opacity: 0.6; transform: scale(1); }
  50%       { opacity: 1;   transform: scale(1.08); }
}

/* ===== Navigation ===== */
#nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  padding: 1.2rem 2rem;
  transition: background 0.4s, backdrop-filter 0.4s, box-shadow 0.4s;
}

#nav.scrolled {
  background: rgba(2, 8, 24, 0.85);
  backdrop-filter: blur(12px);
  box-shadow: 0 1px 0 var(--color-border);
}

.nav-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  font-family: var(--font-display);
  font-size: 1.3rem;
  font-weight: 600;
  color: var(--color-accent-gold);
  letter-spacing: 0.05em;
}

.nav-links {
  display: flex;
  gap: 2.5rem;
}

.nav-links a {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-text-secondary);
  letter-spacing: 0.04em;
  transition: color 0.2s;
}

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

/* ===== Main & Sections ===== */
main { position: relative; z-index: 2; }

section { padding: var(--section-pad); }

.container {
  max-width: var(--max-width);
  margin: 0 auto;
}

.section-title {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 2.8rem);
  font-weight: 600;
  color: var(--color-text-primary);
  margin-bottom: 0.5rem;
  line-height: 1.2;
}

.section-title.centered { text-align: center; }

.section-sub {
  color: var(--color-text-secondary);
  font-size: 1rem;
  margin-bottom: 3.5rem;
}

.section-sub.centered { text-align: center; }

/* ===== Hero ===== */
#hero {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 6rem 1.5rem 4rem;
  position: relative;
}

.hero-greeting {
  font-size: 1rem;
  font-weight: 500;
  color: var(--color-accent-cyan);
  letter-spacing: 0.15em;
  text-transform: uppercase;
  margin-bottom: 0.75rem;
}

.hero-name {
  font-family: var(--font-display);
  font-size: clamp(3.5rem, 10vw, 7rem);
  font-weight: 700;
  line-height: 1;
  background: linear-gradient(135deg, var(--color-text-primary) 30%, var(--color-accent-gold) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 1.25rem;
}

.hero-role {
  font-family: var(--font-mono);
  font-size: clamp(1rem, 2.5vw, 1.3rem);
  color: var(--color-accent-cyan);
  margin-bottom: 1.5rem;
  min-height: 2em;
}

.cursor {
  display: inline-block;
  animation: blink 1s step-end infinite;
  color: var(--color-accent-gold);
  font-weight: 300;
}

@keyframes blink {
  0%, 100% { opacity: 1; }
  50%       { opacity: 0; }
}

.hero-desc {
  max-width: 520px;
  color: var(--color-text-secondary);
  font-size: 1.05rem;
  margin: 0 auto 2.5rem;
}

.hero-cta {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  padding: 0.75rem 2rem;
  border-radius: 4px;
  font-size: 0.9rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  transition: transform 0.2s, box-shadow 0.2s, background 0.2s;
  cursor: pointer;
}

.btn-primary {
  background: var(--color-accent-cyan);
  color: var(--color-bg-deep);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(79,195,247,0.35);
}

.btn-outline {
  border: 1px solid var(--color-border);
  color: var(--color-text-primary);
  background: transparent;
}

.btn-outline:hover {
  border-color: var(--color-accent-cyan);
  color: var(--color-accent-cyan);
  transform: translateY(-2px);
}

.hero-scroll-hint {
  position: absolute;
  bottom: 2.5rem;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  color: var(--color-text-secondary);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  opacity: 0.6;
}

.scroll-line {
  width: 1px;
  height: 40px;
  background: linear-gradient(to bottom, var(--color-accent-cyan), transparent);
  animation: scrollPulse 2s ease-in-out infinite;
}

@keyframes scrollPulse {
  0%, 100% { opacity: 0.4; transform: scaleY(1); }
  50%       { opacity: 1;   transform: scaleY(1.2); }
}

/* ===== About ===== */
#about { padding: var(--section-pad); }

.about-grid {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 5rem;
  align-items: center;
  max-width: var(--max-width);
  margin: 0 auto;
}

.about-avatar-wrap {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
}

.avatar-placeholder {
  width: 200px;
  height: 200px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--color-nebula-purple), var(--color-accent-cyan));
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-size: 5rem;
  font-weight: 700;
  color: var(--color-text-primary);
  position: relative;
  z-index: 1;
}

.avatar-ring {
  position: absolute;
  width: 230px;
  height: 230px;
  border-radius: 50%;
  border: 1px solid rgba(79,195,247,0.3);
  animation: ringRotate 12s linear infinite;
}

.avatar-ring::before {
  content: '';
  position: absolute;
  top: -4px; left: 50%;
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--color-accent-cyan);
  transform: translateX(-50%);
  box-shadow: 0 0 12px var(--color-accent-cyan);
}

@keyframes ringRotate {
  from { transform: rotate(0deg); }
  to   { transform: rotate(360deg); }
}

.about-text .section-title { margin-bottom: 1.25rem; }

.about-text p {
  color: var(--color-text-secondary);
  margin-bottom: 1rem;
  font-size: 1.02rem;
}

.stats-row {
  display: flex;
  gap: 2.5rem;
  margin-top: 2.5rem;
  flex-wrap: wrap;
}

.stat {
  display: flex;
  flex-direction: column;
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.5s, transform 0.5s;
}

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

.stat-number {
  font-family: var(--font-display);
  font-size: 2.2rem;
  font-weight: 700;
  color: var(--color-accent-gold);
  line-height: 1;
}

.stat-label {
  font-size: 0.8rem;
  color: var(--color-text-secondary);
  letter-spacing: 0.05em;
  margin-top: 0.25rem;
}

/* ===== Skills ===== */
#skills { background: rgba(13,31,60,0.3); }

.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1.5rem;
  max-width: var(--max-width);
  margin: 0 auto;
}

.skill-card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: 12px;
  padding: 2rem 1.75rem;
  transition: transform 0.3s, border-color 0.3s, box-shadow 0.3s;
  opacity: 0;
  transform: translateY(40px);
}

.skill-card.visible {
  opacity: 1;
  transform: translateY(0);
  transition: opacity 0.5s, transform 0.5s, border-color 0.3s, box-shadow 0.3s;
}

.skill-card:hover {
  transform: translateY(-6px);
  border-color: rgba(79,195,247,0.4);
  box-shadow: 0 12px 40px rgba(79,195,247,0.1);
}

.skill-icon {
  font-size: 1.8rem;
  color: var(--color-accent-cyan);
  margin-bottom: 1rem;
  display: block;
}

.skill-card h3 {
  font-family: var(--font-display);
  font-size: 1.3rem;
  font-weight: 600;
  margin-bottom: 1.25rem;
  color: var(--color-text-primary);
}

.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.tag-list li {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  padding: 0.3rem 0.7rem;
  border-radius: 4px;
  background: rgba(79,195,247,0.08);
  border: 1px solid rgba(79,195,247,0.2);
  color: var(--color-accent-cyan);
  letter-spacing: 0.03em;
}

/* ===== Projects ===== */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  max-width: var(--max-width);
  margin: 0 auto;
}

.project-card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: 12px;
  padding: 2rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  transition: transform 0.3s, border-color 0.3s, box-shadow 0.3s;
  opacity: 0;
  transform: translateY(40px);
}

.project-card.visible {
  opacity: 1;
  transform: translateY(0);
  transition: opacity 0.5s, transform 0.5s, border-color 0.3s, box-shadow 0.3s;
}

.project-card:hover {
  transform: translateY(-6px);
  border-color: rgba(240,192,64,0.3);
  box-shadow: 0 12px 40px rgba(240,192,64,0.08);
}

.project-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.project-icon {
  font-size: 1.5rem;
  color: var(--color-accent-gold);
}

.project-links {
  display: flex;
  gap: 0.75rem;
}

.icon-link {
  color: var(--color-text-secondary);
  transition: color 0.2s, transform 0.2s;
  display: flex;
  align-items: center;
}

.icon-link:hover {
  color: var(--color-accent-cyan);
  transform: translateY(-2px);
}

.project-title {
  font-family: var(--font-display);
  font-size: 1.35rem;
  font-weight: 600;
  color: var(--color-text-primary);
}

.project-desc {
  color: var(--color-text-secondary);
  font-size: 0.92rem;
  line-height: 1.65;
  flex: 1;
}

.project-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-top: auto;
}

.project-tags span {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  padding: 0.25rem 0.6rem;
  border-radius: 3px;
  background: rgba(240,192,64,0.08);
  border: 1px solid rgba(240,192,64,0.2);
  color: var(--color-accent-gold);
}

/* ===== Contact ===== */
#contact { text-align: center; }

.contact-links {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.75rem;
  margin-top: 2.5rem;
}

.contact-item {
  display: flex;
  align-items: center;
  gap: 0.875rem;
  color: var(--color-text-secondary);
  font-size: 0.9rem;
  padding: 0.875rem 1.5rem;
  border: 1px solid var(--color-border);
  border-radius: 10px;
  text-decoration: none;
  width: 320px;
  transition: color 0.2s, border-color 0.2s, background 0.2s, transform 0.2s;
}

.contact-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  flex-shrink: 0;
  border-radius: 8px;
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--color-border);
}

.contact-label {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.01em;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.contact-item:hover {
  color: var(--color-accent-cyan);
  border-color: rgba(79,195,247,0.35);
  background: rgba(79,195,247,0.04);
  transform: translateY(-2px);
}

.contact-item:hover .contact-icon {
  border-color: rgba(79,195,247,0.35);
  background: rgba(79,195,247,0.08);
}

.contact-item--static {
  cursor: default;
  pointer-events: none;
}

/* ===== Footer ===== */
footer {
  position: relative;
  z-index: 2;
  text-align: center;
  padding: 2rem 1.5rem;
  color: var(--color-text-secondary);
  font-size: 0.85rem;
  border-top: 1px solid var(--color-border);
}

/* ===== Scroll Reveal Base ===== */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(40px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ===== Responsive ===== */
@media (max-width: 768px) {
  :root { --section-pad: 5rem 1.25rem; }

  .about-grid {
    grid-template-columns: 1fr;
    gap: 3rem;
    text-align: center;
  }

  .about-avatar-wrap { justify-content: center; }

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

  .nav-links { gap: 1.5rem; }

  .hero-cta { flex-direction: column; align-items: center; }

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

@media (max-width: 480px) {
  .nav-links { display: none; }

  .skills-grid { grid-template-columns: 1fr; }

  .projects-grid { grid-template-columns: 1fr; }


  .contact-item { width: 100%; }
}