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

::selection {
  background-color: rgba(99, 102, 241, 0.15);
  color: #1e293b;
}

.dark ::selection {
  background-color: rgba(99, 102, 241, 0.3);
  color: #fff;
}

::-webkit-scrollbar {
  width: 8px;
}

::-webkit-scrollbar-track {
  background: #f1f5f9;
}

.dark ::-webkit-scrollbar-track {
  background: #0f172a;
}

::-webkit-scrollbar-thumb {
  background: #cbd5e1;
  border-radius: 4px;
}

.dark ::-webkit-scrollbar-thumb {
  background: #334155;
}

::-webkit-scrollbar-thumb:hover {
  background: #6366f1;
}

/* ===== HERO GRID BACKGROUND ===== */
.hero-grid {
  background-image:
    linear-gradient(rgba(99, 102, 241, 0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(99, 102, 241, 0.06) 1px, transparent 1px);
  background-size: 60px 60px;
}

.dark .hero-grid {
  background-image:
    linear-gradient(rgba(99, 102, 241, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(99, 102, 241, 0.05) 1px, transparent 1px);
}

/* ===== THEME TOGGLE ===== */
.theme-icon-sun,
.theme-icon-moon {
  transition: opacity 0.4s cubic-bezier(0.4, 0, 0.2, 1),
              transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.dark .theme-icon-sun {
  opacity: 1;
  transform: rotate(0deg) scale(1);
}

.dark .theme-icon-moon {
  opacity: 0;
  transform: rotate(180deg) scale(0);
}

html:not(.dark) .theme-icon-sun {
  opacity: 0;
  transform: rotate(-180deg) scale(0);
}

html:not(.dark) .theme-icon-moon {
  opacity: 1;
  transform: rotate(0deg) scale(1);
}

/* ===== NAVIGATION LINKS ===== */
.nav-link {
  position: relative;
  display: inline-flex;
  align-items: center;
  padding: 0.5rem 1rem;
  font-size: 0.875rem;
  font-weight: 500;
  color: #64748b;
  border-radius: 0.5rem;
  transition: all 0.2s ease;
}

.dark .nav-link {
  color: #94a3b8;
}

.nav-link:hover,
.nav-link.active {
  color: #1e293b;
  background-color: rgba(0, 0, 0, 0.04);
}

.dark .nav-link:hover,
.dark .nav-link.active {
  color: #fff;
  background-color: rgba(255, 255, 255, 0.05);
}

.nav-link.active {
  color: #6366f1;
}

.dark .nav-link.active {
  color: #6366f1;
}

.nav-link-cta {
  display: inline-flex;
  align-items: center;
  padding: 0.5rem 1.25rem;
  font-size: 0.875rem;
  font-weight: 600;
  color: #fff;
  background-color: #6366f1;
  border-radius: 0.5rem;
  transition: all 0.2s ease;
  margin-left: 0.25rem;
}

.nav-link-cta:hover {
  background-color: #4f46e5;
  box-shadow: 0 4px 15px rgba(99, 102, 241, 0.3);
}

.mobile-nav-link {
  display: block;
  padding: 0.75rem 1rem;
  font-size: 0.95rem;
  font-weight: 500;
  color: #64748b;
  border-radius: 0.5rem;
  transition: all 0.2s ease;
}

.dark .mobile-nav-link {
  color: #94a3b8;
}

.mobile-nav-link:hover {
  color: #1e293b;
  background-color: rgba(0, 0, 0, 0.04);
  padding-left: 1.5rem;
}

.dark .mobile-nav-link:hover {
  color: #fff;
  background-color: rgba(255, 255, 255, 0.05);
}

/* ===== NAVBAR STATES ===== */
#navbar {
  border-bottom: 1px solid transparent;
}

.navbar-scrolled {
  background-color: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom-color: rgba(0, 0, 0, 0.06);
  box-shadow: 0 4px 30px rgba(0, 0, 0, 0.06);
}

.dark .navbar-scrolled {
  background-color: rgba(15, 23, 42, 0.85);
  border-bottom-color: rgba(255, 255, 255, 0.05);
  box-shadow: 0 4px 30px rgba(0, 0, 0, 0.3);
}

/* ===== SOCIAL ICONS ===== */
.social-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.5rem;
  height: 2.5rem;
  border-radius: 0.75rem;
  border: 1px solid rgba(0, 0, 0, 0.1);
  color: #64748b;
  transition: all 0.3s ease;
}

.dark .social-icon {
  border-color: rgba(255, 255, 255, 0.1);
  color: #94a3b8;
}

.social-icon:hover {
  color: #6366f1;
  border-color: #6366f1;
  background-color: rgba(99, 102, 241, 0.1);
  transform: translateY(-2px);
}

.social-icon-lg {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 3rem;
  height: 3rem;
  border-radius: 0.75rem;
  background-color: rgba(0, 0, 0, 0.03);
  border: 1px solid rgba(0, 0, 0, 0.06);
  color: #64748b;
  transition: all 0.3s ease;
}

.dark .social-icon-lg {
  background-color: rgba(255, 255, 255, 0.05);
  border-color: rgba(255, 255, 255, 0.08);
  color: #94a3b8;
}

.social-icon-lg:hover {
  color: #fff;
  background-color: #6366f1;
  border-color: #6366f1;
  transform: translateY(-2px);
  box-shadow: 0 4px 15px rgba(99, 102, 241, 0.3);
}

/* ===== HERO TOPTAL BADGE ===== */
.hero-toptal-badge {
  position: absolute;
  right: 0.9rem;
  bottom: 0.9rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.16rem 0.24rem;
  border-radius: 9999px;
  background-color: rgba(255, 255, 255, 0.96);
  border: 1px solid rgba(99, 102, 241, 0.16);
  overflow: visible;
  box-shadow: 0 10px 22px rgba(15, 23, 42, 0.16);
  z-index: 3;
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.hero-toptal-badge:hover {
  transform: translateY(-2px) scale(1.02);
  box-shadow: 0 14px 26px rgba(15, 23, 42, 0.22);
}

.hero-toptal-badge-image {
  display: block;
  width: 2.9rem;
  height: auto;
  border-radius: 9999px;
}

.dark .hero-toptal-badge {
  background-color: rgba(15, 23, 42, 0.92);
  border-color: rgba(255, 255, 255, 0.08);
}

@media (max-width: 640px) {
  .hero-toptal-badge {
    right: 0.7rem;
    bottom: 0.7rem;
    padding: 0.12rem 0.18rem;
  }

  .hero-toptal-badge-image {
    width: 2.5rem;
  }
}

/* ===== STAT CARDS ===== */
.stat-card {
  padding: 1.5rem;
  border-radius: 1rem;
  background-color: #fff;
  border: 1px solid rgba(0, 0, 0, 0.06);
  text-align: center;
  transition: all 0.3s ease;
}

.dark .stat-card {
  background-color: rgba(30, 41, 59, 0.5);
  border-color: rgba(255, 255, 255, 0.05);
}

.stat-card:hover {
  border-color: rgba(99, 102, 241, 0.2);
  transform: translateY(-4px);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
}

.dark .stat-card:hover {
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
}

/* ===== SKILL CARDS ===== */
.skill-card {
  padding: 1.5rem;
  border-radius: 1.25rem;
  background-color: #fff;
  border: 1px solid rgba(0, 0, 0, 0.06);
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.dark .skill-card {
  background-color: rgba(30, 41, 59, 0.4);
  border-color: rgba(255, 255, 255, 0.05);
}

.skill-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.08);
  border-color: rgba(99, 102, 241, 0.15);
}

.dark .skill-card:hover {
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.3);
  border-color: rgba(99, 102, 241, 0.2);
}

/* ===== SKILL TAGS ===== */
.skill-tag {
  display: inline-flex;
  align-items: center;
  padding: 0.5rem 1rem;
  font-size: 0.875rem;
  font-weight: 500;
  color: #475569;
  background-color: #fff;
  border: 1px solid rgba(0, 0, 0, 0.06);
  border-radius: 0.75rem;
  transition: all 0.3s ease;
  cursor: default;
}

.dark .skill-tag {
  color: #cbd5e1;
  background-color: rgba(255, 255, 255, 0.03);
  border-color: rgba(255, 255, 255, 0.08);
}

.skill-tag:hover {
  color: #6366f1;
  border-color: rgba(99, 102, 241, 0.3);
  background-color: rgba(99, 102, 241, 0.06);
  transform: translateY(-2px);
  box-shadow: 0 4px 15px rgba(99, 102, 241, 0.08);
}

.dark .skill-tag:hover {
  background-color: rgba(99, 102, 241, 0.08);
  box-shadow: 0 4px 15px rgba(99, 102, 241, 0.1);
}

/* ===== PROJECT CARDS ===== */
.project-card {
  padding: 1.5rem;
  border-radius: 1.25rem;
  background-color: #fff;
  border: 1px solid rgba(0, 0, 0, 0.06);
  transition: all 0.4s ease;
}

.dark .project-card {
  background-color: rgba(30, 41, 59, 0.5);
  border-color: rgba(255, 255, 255, 0.05);
}

.project-card:hover {
  border-color: rgba(99, 102, 241, 0.2);
  transform: translateY(-6px);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.08);
}

.dark .project-card:hover {
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
}

/* ===== CONTACT CARD ===== */
.contact-card {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1.25rem;
  border-radius: 1rem;
  background-color: #fff;
  border: 1px solid rgba(0, 0, 0, 0.06);
  transition: all 0.3s ease;
}

.dark .contact-card {
  background-color: rgba(30, 41, 59, 0.5);
  border-color: rgba(255, 255, 255, 0.05);
}

.contact-card:hover {
  border-color: rgba(99, 102, 241, 0.2);
  transform: translateX(4px);
}

/* ===== ANIMATIONS ===== */
@keyframes fadeUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes pulseSlow {
  0%, 100% { opacity: 0.3; transform: scale(1.1); }
  50% { opacity: 0.5; transform: scale(1.15); }
}

.animate-fade-up {
  opacity: 0;
  animation: fadeUp 0.6s ease forwards;
}

.animate-pulse-slow {
  animation: pulseSlow 4s ease-in-out infinite;
}

.animation-delay-100 { animation-delay: 0.1s; }
.animation-delay-200 { animation-delay: 0.2s; }
.animation-delay-300 { animation-delay: 0.3s; }
.animation-delay-400 { animation-delay: 0.4s; }
.animation-delay-500 { animation-delay: 0.5s; }

/* ===== SCROLL REVEAL ===== */
.section-reveal {
  opacity: 1;
  transform: translateY(0);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

.section-reveal.hidden-for-reveal {
  opacity: 0;
  transform: translateY(40px);
}

.section-reveal.revealed {
  opacity: 1;
  transform: translateY(0);
}

/* ===== THEME TRANSITION ===== */
.theme-switching * {
  transition: background-color 0.6s cubic-bezier(0.4, 0, 0.2, 1),
              color 0.6s cubic-bezier(0.4, 0, 0.2, 1),
              border-color 0.6s cubic-bezier(0.4, 0, 0.2, 1),
              box-shadow 0.6s cubic-bezier(0.4, 0, 0.2, 1) !important;
}

/* ===== RESPONSIVE FINE-TUNING ===== */
@media (max-width: 640px) {
  .stat-card {
    padding: 1rem;
  }

  .project-card {
    padding: 1.25rem;
  }
}