:root {
  --bg-primary: #0a0a0f;
  --bg-secondary: #12121a;
  --bg-card: rgba(255, 255, 255, 0.03);
  --bg-card-hover: rgba(255, 255, 255, 0.06);
  --bg-glass: rgba(18, 18, 26, 0.8);
  --text-primary: #e4e4e7;
  --text-secondary: #a1a1aa;
  --text-muted: #71717a;
  --accent: #6366f1;
  --accent-light: #818cf8;
  --accent-glow: rgba(99, 102, 241, 0.15);
  --border: rgba(255, 255, 255, 0.08);
  --border-hover: rgba(255, 255, 255, 0.15);
  --shadow: 0 4px 24px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 8px 48px rgba(0, 0, 0, 0.4);

  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;

  --section-padding: clamp(4rem, 10vw, 8rem);
  --container-max: 1200px;

  --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.6s cubic-bezier(0.4, 0, 0.2, 1);

  --radius-md: 0.75rem;
  --radius-lg: 1rem;
  --radius-full: 9999px;
}


[data-theme="light"] {
  --bg-primary: #fafafa;
  --bg-secondary: #ffffff;
  --bg-card: rgba(0, 0, 0, 0.02);
  --bg-card-hover: rgba(0, 0, 0, 0.05);
  --bg-glass: rgba(255, 255, 255, 0.85);
  --text-primary: #18181b;
  --text-secondary: #52525b;
  --text-muted: #71717a;
  --accent: #4f46e5;
  --accent-light: #6366f1;
  --accent-glow: rgba(79, 70, 229, 0.1);
  --border: rgba(0, 0, 0, 0.08);
  --border-hover: rgba(0, 0, 0, 0.15);
  --shadow: 0 4px 24px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 8px 48px rgba(0, 0, 0, 0.12);
}

[data-theme="light"] #particles-canvas {
  opacity: 0.3;
}


*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 5rem;
}

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

a {
  color: var(--accent-light);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--accent);
}

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


::-webkit-scrollbar {
  width: 8px;
}
::-webkit-scrollbar-track {
  background: var(--bg-primary);
}
::-webkit-scrollbar-thumb {
  background: var(--border);
  border-radius: var(--radius-full);
}
::-webkit-scrollbar-thumb:hover {
  background: var(--text-muted);
}


::selection {
  background: var(--accent);
  color: #fff;
}

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 clamp(1rem, 4vw, 2rem);
}

.section {
  padding: var(--section-padding) 0;
  position: relative;
}


.section--alt {
  background: var(--bg-secondary);
}

.section__title {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 700;
  margin-bottom: 0.75rem;
  text-align: center;
  letter-spacing: -0.02em;
  position: relative;
}

.section__title::after {
  content: '';
  display: block;
  width: 48px;
  height: 3px;
  background: var(--accent);
  border-radius: var(--radius-full);
  margin: 0.75rem auto 0;
}

.section__subtitle {
  text-align: center;
  color: var(--text-muted);
  font-size: 0.95rem;
  margin-bottom: 3rem;
}


.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1.75rem;
  border-radius: var(--radius-full);
  font-family: var(--font-sans);
  font-size: 0.9rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-base);
  border: 1px solid transparent;
  text-decoration: none;
  white-space: nowrap;
}

.btn--primary {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}

.btn--primary:hover {
  background: var(--accent-light);
  border-color: var(--accent-light);
  color: #fff;
  box-shadow: 0 0 24px var(--accent-glow);
  transform: translateY(-2px);
}

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

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

.btn--full {
  width: 100%;
  justify-content: center;
}


#particles-canvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 0;
  opacity: 0.6;
  transition: opacity var(--transition-slow);
}


.nav {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  transition: all var(--transition-base);
  backdrop-filter: blur(0);
  -webkit-backdrop-filter: blur(0);
}

.nav--scrolled {
  background: var(--bg-glass);
  backdrop-filter: blur(16px) saturate(180%);
  -webkit-backdrop-filter: blur(16px) saturate(180%);
  border-bottom: 1px solid var(--border);
  box-shadow: var(--shadow);
}

.nav__container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 clamp(1rem, 4vw, 2rem);
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 4rem;
}

.nav__logo {
  font-family: var(--font-mono);
  font-size: 1.1rem;
  font-weight: 500;
  color: var(--text-primary);
  letter-spacing: -0.02em;
}

.nav__logo:hover {
  color: var(--accent-light);
}

.nav__menu {
  display: flex;
  align-items: center;
  gap: 2rem;
  list-style: none;
}

.nav__link {
  font-size: 0.875rem;
  font-weight: 400;
  color: var(--text-secondary);
  position: relative;
  padding: 0.25rem 0;
}

.nav__link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--accent);
  border-radius: var(--radius-full);
  transition: width var(--transition-base);
}

.nav__link:hover,
.nav__link--active {
  color: var(--text-primary);
}

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

.nav__toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 10px;
  position: relative;
  z-index: 1001;
}

.nav__toggle span {
  width: 24px;
  height: 2px;
  background: var(--text-primary);
  border-radius: var(--radius-full);
  transition: all var(--transition-base);
}

.nav__toggle--active span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav__toggle--active span:nth-child(2) {
  opacity: 0;
}

.nav__toggle--active span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}


.theme-toggle {
  background: none;
  border: 1px solid var(--border);
  border-radius: var(--radius-full);
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  color: var(--text-secondary);
  transition: all var(--transition-fast);
}

.theme-toggle:hover {
  border-color: var(--accent);
  color: var(--accent-light);
}

.theme-toggle__icon {
  display: none;
}

[data-theme="dark"] .theme-toggle__icon--sun {
  display: block;
}

[data-theme="light"] .theme-toggle__icon--moon {
  display: block;
}

.lang-toggle {
  background: none;
  border: 1px solid var(--border);
  border-radius: var(--radius-full);
  padding: 6px 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  color: var(--text-secondary);
  transition: all var(--transition-fast);
  font-size: 12px;
  font-weight: 500;
  text-transform: uppercase;
  min-width: 40px;
}

.lang-toggle:hover {
  border-color: var(--accent);
  color: var(--accent-light);
}

.lang-toggle option {
  background: var(--bg-secondary);
  color: var(--text-primary);
}

.nav__controls {
  display: flex;
  gap: 8px;
  margin-left: 8px;
}

.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  z-index: 1;
  padding: 6rem 2rem 4rem;
}

.hero__content {
  text-align: center;
  max-width: 700px;
}

.hero__greeting {
  font-size: clamp(0.9rem, 2vw, 1rem);
  font-family: var(--font-mono);
  color: var(--accent-light);
  margin-bottom: 0.75rem;
  letter-spacing: 0.05em;
  opacity: 0;
  animation: heroFadeIn 0.8s ease forwards;
  animation-delay: 0.2s;
}

.hero__name {
  font-size: clamp(2.5rem, 7vw, 4.5rem);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.03em;
  margin-bottom: 1rem;
  background: linear-gradient(135deg, var(--text-primary) 0%, var(--accent-light) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  opacity: 0;
  animation: heroFadeIn 0.8s ease forwards;
  animation-delay: 0.4s;
}

.hero__typing-wrapper {
  font-size: clamp(1rem, 2.5vw, 1.3rem);
  font-family: var(--font-mono);
  color: var(--text-secondary);
  margin-bottom: 1.5rem;
  min-height: 2rem;
  opacity: 0;
  animation: heroFadeIn 0.8s ease forwards;
  animation-delay: 0.6s;
}

.hero__cursor {
  font-weight: 300;
  animation: blink 1s step-end infinite;
  color: var(--accent);
}

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

.hero__description {
  font-size: clamp(0.95rem, 2vw, 1.05rem);
  color: var(--text-muted);
  line-height: 1.7;
  margin-bottom: 2rem;
  white-space: pre-line;
  opacity: 0;
  animation: heroFadeIn 0.8s ease forwards;
  animation-delay: 0.8s;
}

.hero__actions {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 2.5rem;
  opacity: 0;
  animation: heroFadeIn 0.8s ease forwards;
  animation-delay: 1s;
}

.hero__social {
  display: flex;
  gap: 1rem;
  justify-content: center;
  opacity: 0;
  animation: heroFadeIn 0.8s ease forwards;
  animation-delay: 1.2s;
}

.hero__social-link {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-full);
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
  transition: all var(--transition-base);
}

.hero__social-link:hover {
  border-color: var(--accent);
  color: var(--accent-light);
  transform: translateY(-3px);
  box-shadow: 0 4px 16px var(--accent-glow);
}

.hero__scroll-indicator {
  position: absolute;
  bottom: 2rem;
  left: 0;
  right: 0;
  width: max-content;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  color: var(--text-muted);
  font-size: 0.75rem;
  font-family: var(--font-mono);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  opacity: 0;
  animation: heroFadeIn 0.8s ease forwards;
  animation-delay: 1.6s;
}

.hero__scroll-line {
  width: 1px;
  height: 40px;
  background: linear-gradient(to bottom, var(--accent), transparent);
  animation: scrollLine 2.5s ease-in-out infinite;
}

@keyframes scrollLine {
  0% { opacity: 0; height: 0; }
  20% { opacity: 1; height: 40px; }
  80% { opacity: 1; height: 40px; }
  100% { opacity: 0; height: 0; }
}

@keyframes heroFadeIn {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}


.about__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: start;
  margin-top: 3rem;
}

.about__text p {
  color: var(--text-secondary);
  margin-bottom: 1rem;
  font-size: 1rem;
  line-height: 1.8;
}

.about__text strong {
  color: var(--text-primary);
  font-weight: 600;
}

.about__stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
}

.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.5rem 1rem;
  text-align: center;
  transition: all var(--transition-base);
}

.stat-card:hover {
  border-color: var(--accent);
  background: var(--bg-card-hover);
  transform: translateY(-4px);
  box-shadow: 0 8px 32px var(--accent-glow);
}

.stat-card__number {
  font-size: 2rem;
  font-weight: 700;
  color: var(--accent-light);
  display: inline;
}

.stat-card__suffix {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--accent-light);
}

.stat-card__label {
  display: block;
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-top: 0.5rem;
}


.skills__categories {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
  margin-top: 3rem;
}

.skill-category {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  transition: all var(--transition-base);
}

.skill-category:hover {
  border-color: var(--border-hover);
  background: var(--bg-card-hover);
  transform: translateY(-2px);
}

.skill-category__title {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 1rem;
  color: var(--text-primary);
}

.skill-category__title svg {
  color: var(--accent-light);
  flex-shrink: 0;
}

.skill-category__items {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.skill-tag {
  background: var(--accent-glow);
  color: var(--accent-light);
  padding: 0.35rem 0.85rem;
  border-radius: var(--radius-full);
  font-size: 0.8rem;
  font-weight: 500;
  border: 1px solid rgba(99, 102, 241, 0.15);
  transition: all var(--transition-fast);
}

.skill-tag:hover {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
  transform: scale(1.05);
}


.timeline {
  position: relative;
  max-width: 700px;
  margin: 3rem auto 0;
  padding-left: 2rem;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(to bottom, var(--accent), var(--border), transparent);
  border-radius: var(--radius-full);
}

.timeline__item {
  position: relative;
  margin-bottom: 2.5rem;
}

.timeline__item:last-child {
  margin-bottom: 0;
}

.timeline__marker {
  position: absolute;
  left: -2rem;
  top: 0.5rem;
  width: 12px;
  height: 12px;
  border-radius: var(--radius-full);
  background: var(--accent);
  border: 3px solid var(--bg-primary);
  box-shadow: 0 0 0 2px var(--accent);
  transform: translateX(calc(-50% + 1px));
  transition: background var(--transition-base);
}

.timeline__content {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  transition: all var(--transition-base);
}

.timeline__content:hover {
  border-color: var(--border-hover);
  background: var(--bg-card-hover);
}

.timeline__date {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--accent-light);
  font-weight: 500;
}

.timeline__title {
  font-size: 1.1rem;
  font-weight: 600;
  margin-top: 0.25rem;
  color: var(--text-primary);
}

.timeline__company {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-top: 0.15rem;
}

.timeline__description {
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin-top: 0.75rem;
  line-height: 1.7;
}

.timeline__list {
  list-style: none;
  margin-top: 0.75rem;
  padding: 0;
}

.timeline__list li {
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.6;
  padding-left: 1.25rem;
  position: relative;
  margin-bottom: 0.35rem;
}

.timeline__list li::before {
  content: '▪';
  position: absolute;
  left: 0;
  color: var(--accent-light);
  font-size: 0.7rem;
  top: 2px;
}


.projects__grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 1.5rem;
  margin-top: 2rem;
  min-height: 200px;
}

.project-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  display: flex;
  flex-direction: column;
  transition: all var(--transition-base);
  opacity: 0;
  transform: translateY(20px);
  animation: cardFadeIn 0.5s ease forwards;
}

.project-card:nth-child(1) { animation-delay: 0.1s; }
.project-card:nth-child(2) { animation-delay: 0.2s; }
.project-card:nth-child(3) { animation-delay: 0.3s; }
.project-card:nth-child(4) { animation-delay: 0.4s; }
.project-card:nth-child(5) { animation-delay: 0.5s; }
.project-card:nth-child(n+6) { animation-delay: 0.6s; }

@keyframes cardFadeIn {
  to { opacity: 1; transform: translateY(0); }
}

.project-card:hover {
  border-color: var(--accent);
  background: var(--bg-card-hover);
  transform: translateY(-4px);
  box-shadow: 0 8px 32px var(--accent-glow);
}

.project-card__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1rem;
}

.project-card__icon {
  color: var(--accent-light);
}

.project-card__links {
  display: flex;
  gap: 0.5rem;
}

.project-card__links a {
  color: var(--text-muted);
  transition: color var(--transition-fast);
}

.project-card__links a:hover {
  color: var(--accent-light);
}

.project-card__name {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
  color: var(--text-primary);
}

.project-card__description {
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.6;
  flex-grow: 1;
  margin-bottom: 1.25rem;
}

.project-card__footer {
  display: flex;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
}

.project-card__lang {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.8rem;
  color: var(--text-muted);
}

.project-card__lang-dot {
  width: 10px;
  height: 10px;
  border-radius: var(--radius-full);
}

.project-card__stat {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  font-size: 0.8rem;
  color: var(--text-muted);
}

.projects__loading {
  grid-column: 1 / -1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  padding: 3rem;
  color: var(--text-muted);
}

.spinner {
  width: 32px;
  height: 32px;
  border: 3px solid var(--border);
  border-top-color: var(--accent);
  border-radius: var(--radius-full);
  animation: spin 0.8s linear infinite;
}

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

.projects__more {
  text-align: center;
  margin-top: 2.5rem;
}


.contact__grid {
  display: grid;
  grid-template-columns: 1fr 1.5fr;
  gap: 3rem;
  margin-top: 3rem;
}

.contact__info {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.contact__card {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  padding: 1.25rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  transition: all var(--transition-base);
}

.contact__card:hover {
  border-color: var(--border-hover);
  background: var(--bg-card-hover);
}

.contact__card svg {
  color: var(--accent-light);
  flex-shrink: 0;
  margin-top: 2px;
}

.contact__card h4 {
  font-size: 0.875rem;
  font-weight: 600;
  margin-bottom: 0.25rem;
}

.contact__card a,
.contact__card p {
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.contact__card a:hover {
  color: var(--accent-light);
}


.contact__form {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.form-group {
  position: relative;
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 1rem 1rem 0.75rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-size: 0.9rem;
  transition: all var(--transition-fast);
  outline: none;
  resize: vertical;
}

.form-group input:focus,
.form-group textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow);
}

.form-group label {
  position: absolute;
  left: 1rem;
  top: 1rem;
  font-size: 0.9rem;
  color: var(--text-muted);
  pointer-events: none;
  transition: all var(--transition-fast);
  background: transparent;
  padding: 0 0.25rem;
}

.form-group input:focus ~ label,
.form-group input:not(:placeholder-shown) ~ label,
.form-group textarea:focus ~ label,
.form-group textarea:not(:placeholder-shown) ~ label {
  top: -0.55rem;
  left: 0.75rem;
  font-size: 0.75rem;
  color: var(--accent-light);
  background: var(--bg-primary);
}




.form-group input::placeholder,
.form-group textarea::placeholder {
  color: transparent;
}

.form-honeypot {
  display: none !important;
  overflow: hidden;
  height: 0;
  width: 0;
  padding: 0;
  border: 0;
}

.form-status {
  font-size: 0.875rem;
  text-align: center;
  min-height: 1.25rem;
}

.form-status--success {
  color: #22c55e;
}

.form-status--error {
  color: #ef4444;
}


.footer {
  border-top: 1px solid var(--border);
  padding: 3rem 0 2rem;
  position: relative;
  z-index: 1;
  background: var(--bg-secondary);
}

.footer__content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1.5rem;
  margin-bottom: 2rem;
}

.footer__logo {
  font-family: var(--font-mono);
  font-size: 1.1rem;
  font-weight: 500;
  color: var(--text-primary);
}

.footer__logo:hover {
  color: var(--accent-light);
}

.footer__nav {
  display: flex;
  gap: 1.5rem;
  flex-wrap: wrap;
}

.footer__nav a {
  font-size: 0.875rem;
  color: var(--text-muted);
}

.footer__nav a:hover {
  color: var(--text-primary);
}

.footer__social {
  display: flex;
  gap: 0.75rem;
}

.footer__social a {
  color: var(--text-muted);
  transition: color var(--transition-fast);
}

.footer__social a:hover {
  color: var(--accent-light);
}

.footer__bottom {
  text-align: center;
  padding-top: 2rem;
  border-top: 1px solid var(--border);
}

.footer__bottom p {
  font-size: 0.8rem;
  color: var(--text-muted);
}


.back-to-top {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  width: 44px;
  height: 44px;
  border-radius: var(--radius-full);
  background: var(--bg-glass);
  border: 1px solid var(--border);
  color: var(--text-secondary);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: all var(--transition-base);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  z-index: 999;
}

.back-to-top--visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.back-to-top:hover {
  border-color: var(--accent);
  color: var(--accent-light);
  transform: translateY(-3px);
}


[data-reveal] {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.7s cubic-bezier(0.4, 0, 0.2, 1), transform 0.7s cubic-bezier(0.4, 0, 0.2, 1);
}

[data-reveal].revealed {
  opacity: 1;
  transform: translateY(0);
}


.preloader {
  position: fixed;
  inset: 0;
  z-index: 9999;
  background: var(--bg-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: opacity 0.5s ease, visibility 0.5s ease;
}

.preloader--hidden {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}

.preloader__content {
  text-align: center;
}

.preloader__logo {
  font-family: var(--font-mono);
  font-size: 1.5rem;
  font-weight: 500;
  color: var(--accent-light);
  display: block;
  margin-bottom: 1.5rem;
  animation: preloaderPulse 1.5s ease-in-out infinite;
}

@keyframes preloaderPulse {
  0%, 100% { opacity: 0.5; transform: scale(0.98); }
  50% { opacity: 1; transform: scale(1); }
}

.preloader__bar {
  width: 120px;
  height: 2px;
  background: var(--border);
  border-radius: var(--radius-full);
  overflow: hidden;
  margin: 0 auto;
}

.preloader__bar-fill {
  width: 0%;
  height: 100%;
  background: var(--accent);
  border-radius: var(--radius-full);
  animation: preloaderFill 1.2s ease forwards;
}

@keyframes preloaderFill {
  to { width: 100%; }
}


.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--accent), var(--accent-light));
  width: 0%;
  z-index: 1001;
  transition: width 0.1s linear;
}


@media (hover: hover) and (pointer: fine) {
  html.has-custom-cursor,
  html.has-custom-cursor body,
  html.has-custom-cursor body * {
    cursor: none !important;
  }

  html.has-custom-cursor input,
  html.has-custom-cursor textarea,
  html.has-custom-cursor select {
    cursor: text !important;
  }

}

.cursor {
  width: 8px;
  height: 8px;
  background: var(--accent);
  border-radius: 50%;
  position: fixed;
  pointer-events: none;
  z-index: 9998;
  transform: translate(-50%, -50%);
  transition: width 0.2s ease, height 0.2s ease, background 0.2s ease;
}

.cursor--hover {
  width: 40px;
  height: 40px;
  background: rgba(99, 102, 241, 0.15);
  border: 1px solid var(--accent-light);
}

.cursor-follower {
  width: 32px;
  height: 32px;
  border: 1px solid rgba(99, 102, 241, 0.3);
  border-radius: 50%;
  position: fixed;
  pointer-events: none;
  z-index: 9997;
  transform: translate(-50%, -50%);
  transition: width 0.3s ease, height 0.3s ease, border-color 0.3s ease;
}

.cursor-follower--hover {
  width: 60px;
  height: 60px;
  border-color: rgba(99, 102, 241, 0.1);
}


.noise-overlay {
  position: fixed;
  inset: -50%;
  width: 200%;
  height: 200%;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  opacity: 0.025;
  pointer-events: none;
  z-index: 1;
}


.gradient-orbs {
  position: fixed;
  inset: 0;
  overflow: hidden;
  pointer-events: none;
  z-index: 0;
}

.gradient-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(100px);
  opacity: 0.08;
  animation: orbFloat 20s ease-in-out infinite;
}

[data-theme="light"] .gradient-orb {
  opacity: 0.04;
}

.gradient-orb--1 {
  width: 600px;
  height: 600px;
  background: var(--accent);
  top: -10%;
  right: -10%;
}

.gradient-orb--2 {
  width: 400px;
  height: 400px;
  background: #818cf8;
  bottom: 10%;
  left: -5%;
  animation-delay: -7s;
}

.gradient-orb--3 {
  width: 300px;
  height: 300px;
  background: #a78bfa;
  top: 50%;
  left: 40%;
  animation-delay: -14s;
}

@keyframes orbFloat {
  0%, 100% { transform: translate(0, 0) scale(1); }
  25% { transform: translate(40px, -30px) scale(1.05); }
  50% { transform: translate(-20px, 40px) scale(0.95); }
  75% { transform: translate(30px, 20px) scale(1.02); }
}


.certs__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 1.5rem;
  margin-top: 3rem;
}

.cert-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  text-align: center;
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
}

.cert-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--accent), var(--accent-light));
  opacity: 0;
  transition: opacity var(--transition-base);
}

.cert-card:hover {
  border-color: var(--accent);
  background: var(--bg-card-hover);
  transform: translateY(-4px);
  box-shadow: 0 8px 32px var(--accent-glow);
}

.cert-card:hover::before {
  opacity: 1;
}

.cert-card__icon {
  color: var(--accent-light);
  margin-bottom: 1rem;
}

.cert-card__title {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 0.25rem;
}

.cert-card__issuer {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 1rem;
}

.cert-card__badge {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 0.25rem 0.75rem;
  border-radius: var(--radius-full);
  background: var(--accent-glow);
  color: var(--accent-light);
  border: 1px solid rgba(99, 102, 241, 0.15);
}


.btn--ghost {
  background: transparent;
  color: var(--text-secondary);
  border-color: transparent;
}

.btn--ghost:hover {
  color: var(--accent-light);
  transform: translateY(-2px);
}


@media screen and (max-width: 768px) {
  
  .cursor,
  .cursor-follower {
    display: none !important;
  }

  .nav__toggle {
    display: flex;
  }

  .nav__menu {
    position: fixed;
    top: 0;
    right: 0;
    width: 280px;
    height: 100vh;
    background: var(--bg-secondary);
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 2rem;
    transform: translateX(100%);
    transition: transform var(--transition-base);
    border-left: 1px solid var(--border);
    box-shadow: var(--shadow-lg);
    will-change: transform;
    z-index: 1000;
  }

  .nav__menu--open {
    transform: translateX(0);
  }

  .nav__overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: 999;
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--transition-base), visibility var(--transition-base);
    -webkit-tap-highlight-color: transparent;
  }

  .nav__overlay--visible {
    opacity: 1;
    visibility: visible;
  }

  .nav__link {
    font-size: 1.1rem;
  }

  .about__grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .about__stats {
    grid-template-columns: repeat(3, 1fr);
  }

  .contact__grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

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

  .hero {
    padding: 4.5rem 1.25rem 2.75rem;
  }

  .hero__content {
    max-width: 100%;
  }

  .hero__description {
    font-size: 0.96rem;
    line-height: 1.6;
    margin-bottom: 1.5rem;
  }

  .hero__actions {
    flex-direction: column;
    align-items: stretch;
    gap: 0.75rem;
  }

  .hero__actions .btn {
    width: 100%;
    justify-content: center;
  }

  .hero__social {
    gap: 0.75rem;
  }

  .hero__scroll-indicator {
    bottom: 1.25rem;
    font-size: 0.7rem;
  }
}

@media screen and (max-width: 480px) {
  .about__stats {
    grid-template-columns: 1fr;
    gap: 0.75rem;
  }

  .stat-card {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    text-align: left;
    padding: 1rem 1.25rem;
  }

  .stat-card__label {
    margin-top: 0;
  }

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

  .hero__name {
    font-size: 2.05rem;
  }

  .hero__greeting {
    font-size: 0.82rem;
  }

  .hero__typing-wrapper {
    font-size: 0.95rem;
    min-height: 1.75rem;
  }
}

@media screen and (min-width: 1600px) {
  :root {
    --container-max: 1400px;
  }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }

  .cursor, .cursor-follower {
    display: none !important;
  }
}

.skip-link {
  position: absolute;
  top: -100%;
  left: 1rem;
  z-index: 10000;
  padding: 0.75rem 1.5rem;
  background: var(--accent);
  color: #fff;
  font-family: var(--font-sans);
  font-size: 0.9rem;
  font-weight: 500;
  border-radius: 0 0 var(--radius-md) var(--radius-md);
  transition: top 0.2s ease;
}

.skip-link:focus {
  top: 0;
  outline: none;
}