/* ═══════════════════════════════════════════════════
   RESET & BASE
═══════════════════════════════════════════════════ */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg:           #0a0a0a;
  --bg-2:         #111111;
  --bg-3:         #1a1a1a;
  --border:       #222222;
  --border-hover: #333333;
  --accent:       #6366f1;
  --accent-soft:  rgba(99,102,241,.12);
  --accent-glow:  rgba(99,102,241,.25);
  --text-1:       #f4f4f5;
  --text-2:       #a1a1aa;
  --text-3:       #52525b;
  --font:         'Inter', system-ui, sans-serif;
  --mono:         'JetBrains Mono', monospace;
  --radius:       12px;
  --radius-lg:    20px;
  --transition:   0.25s cubic-bezier(.4,0,.2,1);
  --shadow-card:  0 1px 3px rgba(0,0,0,.4), 0 8px 32px rgba(0,0,0,.3);
  --shadow-glow:  0 0 60px rgba(99,102,241,.15);
}

html { scroll-behavior: smooth; font-size: 16px; }

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text-1);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }

/* ═══════════════════════════════════════════════════
   SCROLLBAR
═══════════════════════════════════════════════════ */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: var(--border-hover); border-radius: 99px; }

/* ═══════════════════════════════════════════════════
   LAYOUT HELPERS
═══════════════════════════════════════════════════ */
.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 2rem;
}

.section {
  padding: 7rem 0;
}

.section-label {
  font-family: var(--mono);
  font-size: 0.75rem;
  color: var(--accent);
  letter-spacing: .12em;
  text-transform: uppercase;
  margin-bottom: 1rem;
}

.section-title {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 3.5rem;
  color: var(--text-1);
}

/* ═══════════════════════════════════════════════════
   NAVBAR
═══════════════════════════════════════════════════ */
#navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  padding: 0 2rem;
  height: 64px;
  display: flex;
  align-items: center;
  background: rgba(10,10,10,.8);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
  transition: background var(--transition);
}

.nav-inner {
  max-width: 1100px;
  width: 100%;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  font-family: var(--mono);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-1);
  transition: color var(--transition);
}
.nav-logo:hover { color: var(--accent); }
.logo-bracket { color: var(--accent); }

.nav-links {
  display: flex;
  list-style: none;
  gap: 2.5rem;
}

.nav-link {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-2);
  position: relative;
  padding-bottom: 2px;
  transition: color var(--transition);
}
.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0; left: 0;
  width: 0; height: 1px;
  background: var(--accent);
  transition: width var(--transition);
}
.nav-link:hover,
.nav-link.active { color: var(--text-1); }
.nav-link:hover::after,
.nav-link.active::after { width: 100%; }

/* Hamburger */
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}
.hamburger span {
  display: block;
  width: 22px; height: 2px;
  background: var(--text-2);
  border-radius: 99px;
  transition: var(--transition);
}
.hamburger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger.open span:nth-child(2) { opacity: 0; }
.hamburger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ═══════════════════════════════════════════════════
   HERO
═══════════════════════════════════════════════════ */
.hero {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  position: relative;
  padding: 8rem 2rem 4rem;
  overflow: hidden;
}

/* subtle grid background */
.hero-bg-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--border) 1px, transparent 1px),
    linear-gradient(90deg, var(--border) 1px, transparent 1px);
  background-size: 64px 64px;
  opacity: .35;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 50%, black 30%, transparent 100%);
  -webkit-mask-image: radial-gradient(ellipse 80% 60% at 50% 50%, black 30%, transparent 100%);
}

/* accent glow blob */
.hero-glow {
  position: absolute;
  width: 600px; height: 600px;
  background: radial-gradient(circle, var(--accent-glow) 0%, transparent 70%);
  top: 50%; left: 50%;
  transform: translate(-50%, -60%);
  pointer-events: none;
  filter: blur(40px);
}

.hero-content {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.25rem;
}

/* badge */
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  background: var(--accent-soft);
  border: 1px solid rgba(99,102,241,.25);
  border-radius: 99px;
  padding: .35rem 1rem;
  font-size: .8rem;
  font-weight: 500;
  color: #a5b4fc;
  font-family: var(--mono);
}
.badge-dot {
  width: 6px; height: 6px;
  background: var(--accent);
  border-radius: 50%;
  box-shadow: 0 0 6px var(--accent);
  animation: pulse 2s infinite;
}
@keyframes pulse {
  0%,100% { opacity: 1; transform: scale(1); }
  50%      { opacity: .5; transform: scale(.8); }
}

/* photo */
.hero-photo-wrap {
  position: relative;
  width: 130px; height: 130px;
}
.hero-photo {
  width: 100%; height: 100%;
  object-fit: cover;
  border-radius: 50%;
  border: 2px solid var(--border-hover);
  position: relative;
  z-index: 1;
}
.hero-photo-ring {
  position: absolute;
  inset: -5px;
  border-radius: 50%;
  border: 1px solid transparent;
  background: linear-gradient(135deg, var(--accent), transparent 60%) border-box;
  -webkit-mask:
    linear-gradient(#fff 0 0) padding-box,
    linear-gradient(#fff 0 0);
  -webkit-mask-composite: destination-out;
  mask-composite: exclude;
  animation: spin 8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

.hero-name {
  font-size: clamp(2.2rem, 6vw, 3.8rem);
  font-weight: 800;
  letter-spacing: -.02em;
  line-height: 1.1;
  background: linear-gradient(135deg, #fff 40%, #a5b4fc 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-sub {
  font-size: 1rem;
  color: var(--text-2);
  max-width: 440px;
  line-height: 1.7;
}

/* hero social icons */
.hero-socials {
  display: flex;
  gap: 1rem;
  margin-top: .25rem;
}
.hero-social-link {
  width: 40px; height: 40px;
  display: flex; align-items: center; justify-content: center;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text-2);
  font-size: 1rem;
  transition: var(--transition);
  background: var(--bg-2);
}
.hero-social-link:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--accent-soft);
  transform: translateY(-2px);
}

/* cta buttons */
.hero-cta {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  justify-content: center;
  margin-top: .5rem;
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  padding: .7rem 1.6rem;
  background: var(--accent);
  color: #fff;
  font-weight: 600;
  font-size: .9rem;
  border-radius: var(--radius);
  border: 1px solid transparent;
  transition: var(--transition);
  box-shadow: 0 0 0 0 var(--accent-glow);
}
.btn-primary:hover {
  background: #5254e7;
  box-shadow: 0 0 20px var(--accent-glow);
  transform: translateY(-1px);
}

.btn-ghost {
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  padding: .7rem 1.6rem;
  background: transparent;
  color: var(--text-1);
  font-weight: 600;
  font-size: .9rem;
  border-radius: var(--radius);
  border: 1px solid var(--border-hover);
  transition: var(--transition);
}
.btn-ghost:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--accent-soft);
  transform: translateY(-1px);
}

/* scroll hint */
.hero-scroll-hint {
  position: absolute;
  bottom: 2.5rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: .4rem;
  color: var(--text-3);
  font-size: .7rem;
  letter-spacing: .1em;
  text-transform: uppercase;
  font-family: var(--mono);
  animation: float 3s ease-in-out infinite;
}
@keyframes float {
  0%,100% { transform: translateY(0); }
  50%      { transform: translateY(6px); }
}

/* ═══════════════════════════════════════════════════
   ABOUT
═══════════════════════════════════════════════════ */
.about { background: var(--bg); }

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
}

.about-card {
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 2rem;
  font-size: .95rem;
  color: var(--text-2);
  line-height: 1.85;
  transition: border-color var(--transition);
}
.about-card:hover {
  border-color: var(--border-hover);
}

/* ═══════════════════════════════════════════════════
   SKILLS
═══════════════════════════════════════════════════ */
.skills { background: var(--bg-2); }

.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(110px, 1fr));
  gap: 1rem;
}

.skill-card {
  background: var(--bg-3);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem .75rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: .65rem;
  cursor: default;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}
.skill-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--accent-soft);
  opacity: 0;
  transition: opacity var(--transition);
}
.skill-card:hover {
  border-color: var(--accent);
  transform: translateY(-3px);
  box-shadow: 0 8px 24px rgba(0,0,0,.3);
}
.skill-card:hover::before { opacity: 1; }

.skill-logo {
  width: 40px; height: 40px;
  object-fit: contain;
  position: relative;
  z-index: 1;
}

.skill-name {
  font-size: .72rem;
  font-weight: 600;
  color: var(--text-2);
  text-align: center;
  position: relative;
  z-index: 1;
  transition: color var(--transition);
}
.skill-card:hover .skill-name { color: var(--text-1); }

/* ═══════════════════════════════════════════════════
   PROJECTS
═══════════════════════════════════════════════════ */
.projects { background: var(--bg); }

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

.project-card {
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: var(--transition);
  position: relative;
}
.project-card:hover {
  border-color: var(--accent);
  transform: translateY(-4px);
  box-shadow: 0 16px 48px rgba(0,0,0,.4), var(--shadow-glow);
}

.project-img-wrap {
  height: 180px;
  background: var(--bg-3);
  display: flex;
  align-items: center;
  justify-content: center;
  border-bottom: 1px solid var(--border);
  overflow: hidden;
  padding: 1.5rem;
}
.project-img-wrap img {
  max-height: 120px;
  width: auto;
  max-width: 100%;
  object-fit: contain;
  transition: transform var(--transition);
}
.project-card:hover .project-img-wrap img { transform: scale(1.05); }

.project-body {
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  flex: 1;
  gap: .75rem;
}

.project-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-1);
  line-height: 1.4;
}

.project-desc {
  font-size: .85rem;
  color: var(--text-2);
  line-height: 1.75;
  flex: 1;
}

.project-actions {
  display: flex;
  gap: .75rem;
  margin-top: .5rem;
}

.project-btn {
  flex: 1;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .4rem;
  padding: .55rem 1rem;
  border-radius: 8px;
  font-size: .8rem;
  font-weight: 600;
  transition: var(--transition);
  cursor: pointer;
  border: none;
}
.project-btn-repo {
  background: var(--bg-3);
  border: 1px solid var(--border-hover);
  color: var(--text-2);
}
.project-btn-repo:hover {
  border-color: var(--text-2);
  color: var(--text-1);
  background: #222;
}
.project-btn-live {
  background: var(--accent);
  color: #fff;
  border: 1px solid transparent;
}
.project-btn-live:hover {
  background: #5254e7;
  box-shadow: 0 0 16px var(--accent-glow);
}

/* ═══════════════════════════════════════════════════
   CONTACT
═══════════════════════════════════════════════════ */
.contact { background: var(--bg-2); }

.contact-sub {
  color: var(--text-2);
  font-size: .95rem;
  max-width: 580px;
  margin-bottom: 3rem;
  line-height: 1.8;
}

.contact-cards {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 1rem;
  margin-bottom: 2.5rem;
}

.contact-card {
  background: var(--bg-3);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  display: flex;
  align-items: center;
  gap: 1rem;
  transition: var(--transition);
  text-decoration: none;
}
.contact-card:hover {
  border-color: var(--accent);
  background: var(--accent-soft);
  transform: translateY(-2px);
}
.contact-card-icon {
  width: 40px; height: 40px;
  background: var(--accent-soft);
  border: 1px solid rgba(99,102,241,.2);
  border-radius: 10px;
  display: flex; align-items: center; justify-content: center;
  color: var(--accent);
  font-size: 1rem;
  flex-shrink: 0;
}
.contact-card-label {
  font-size: .7rem;
  color: var(--text-3);
  text-transform: uppercase;
  letter-spacing: .08em;
  font-family: var(--mono);
}
.contact-card-value {
  font-size: .875rem;
  color: var(--text-1);
  font-weight: 500;
  margin-top: .2rem;
  word-break: break-all;
}

/* contact social row */
.contact-socials {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}
.contact-social-btn {
  display: inline-flex;
  align-items: center;
  gap: .6rem;
  padding: .65rem 1.25rem;
  border: 1px solid var(--border-hover);
  border-radius: var(--radius);
  background: var(--bg-3);
  color: var(--text-2);
  font-size: .85rem;
  font-weight: 500;
  transition: var(--transition);
  cursor: pointer;
}
.contact-social-btn:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--accent-soft);
  transform: translateY(-2px);
}

/* ═══════════════════════════════════════════════════
   FOOTER
═══════════════════════════════════════════════════ */
#siteFooter {
  background: var(--bg);
  border-top: 1px solid var(--border);
  padding: 2.5rem 2rem;
}
.footer-inner {
  max-width: 1100px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: .75rem;
  text-align: center;
}
.footer-tagline {
  color: var(--text-2);
  font-size: .875rem;
}
.footer-copy {
  color: var(--text-3);
  font-size: .775rem;
  font-family: var(--mono);
}

/* ═══════════════════════════════════════════════════
   RESPONSIVE
═══════════════════════════════════════════════════ */
@media (max-width: 768px) {
  .nav-links {
    display: none;
    position: absolute;
    top: 64px; left: 0; right: 0;
    background: rgba(10,10,10,.97);
    border-bottom: 1px solid var(--border);
    flex-direction: column;
    padding: 1.5rem 2rem;
    gap: 1.25rem;
  }
  .nav-links.open { display: flex; }
  .hamburger { display: flex; }

  .about-grid { grid-template-columns: 1fr; }
  .skills-grid { grid-template-columns: repeat(auto-fill, minmax(90px, 1fr)); }
  .projects-grid { grid-template-columns: 1fr; }
  .hero-name { font-size: 2.4rem; }
  .section { padding: 5rem 0; }

  .contact-cards { grid-template-columns: 1fr; }
}

@media (max-width: 480px) {
  .hero-cta { flex-direction: column; align-items: stretch; }
  .btn-primary, .btn-ghost { justify-content: center; }
  .skills-grid { grid-template-columns: repeat(3, 1fr); }
}

/* ═══════════════════════════════════════════════════
   FADE-IN ANIMATION (Intersection Observer)
═══════════════════════════════════════════════════ */
.fade-up {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity .6s ease, transform .6s ease;
}
.fade-up.visible {
  opacity: 1;
  transform: none;
}