/* ===== CSS Variables & Design Tokens ===== */
:root {
  --bg-primary: #0a0a0f;
  --bg-secondary: #12121a;
  --bg-card: #1a1a25;
  --bg-card-hover: #22222f;
  --text-primary: #f0f0f5;
  --text-secondary: #a0a0b5;
  --text-muted: #6b6b80;
  --accent: #6c63ff;
  --accent-light: #8b83ff;
  --accent-dark: #4f46e5;
  --accent-glow: rgba(108, 99, 255, 0.3);
  --gradient-accent: linear-gradient(135deg, #6c63ff, #a855f7);
  --gradient-bg: linear-gradient(180deg, #0a0a0f 0%, #12121a 100%);
  --border-color: rgba(255, 255, 255, 0.06);
  --border-accent: rgba(108, 99, 255, 0.3);
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 8px 32px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 16px 64px rgba(0, 0, 0, 0.5);
  --shadow-glow: 0 0 40px rgba(108, 99, 255, 0.15);
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --transition-fast: 0.2s ease;
  --transition-normal: 0.3s ease;
  --transition-slow: 0.5s ease;
  --font-family:
    "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --container-max: 1200px;
}

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

html {
  font-family: var(--font-family);
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
}

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

li {
  list-style: none;
}

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

/* ===== Container ===== */
.section__container {
  width: min(100% - 48px, var(--container-max));
  margin-inline: auto;
}

/* ===== Scroll Animations ===== */
.animate-on-scroll {
  opacity: 0;
  transform: translateY(30px);
  transition:
    opacity 0.7s ease,
    transform 0.7s ease;
}

.animate-on-scroll.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 14px 28px;
  font-size: 0.95rem;
  font-weight: 600;
  font-family: var(--font-family);
  border-radius: var(--radius-md);
  border: none;
  cursor: pointer;
  transition: all var(--transition-normal);
  letter-spacing: 0.02em;
}

.btn--primary {
  background: var(--gradient-accent);
  color: white;
  box-shadow: 0 4px 20px rgba(108, 99, 255, 0.3);
}

.btn--primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(108, 99, 255, 0.45);
  color: white;
}

.btn--outline {
  background: transparent;
  color: var(--text-primary);
  border: 2px solid var(--border-accent);
}

.btn--outline:hover {
  background: rgba(108, 99, 255, 0.1);
  border-color: var(--accent);
  transform: translateY(-2px);
  color: white;
}

/* ===== Logo ===== */
.logo-bracket {
  color: var(--accent);
  font-weight: 700;
}

/* ===== Navbar ===== */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  display: flex;
  align-items: center;
  height: 72px;
  background: rgba(10, 10, 15, 0.8);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-color);
  transition: background var(--transition-normal);
}

.navbar__container {
  width: min(100% - 48px, var(--container-max));
  margin-inline: auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.navbar-logo__link {
  font-size: 1.4rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--text-primary);
}

.navbar__list {
  display: flex;
  align-items: center;
  gap: 8px;
}

.navbar__link {
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: all var(--transition-fast);
}

.navbar__link:hover {
  color: var(--text-primary);
  background: rgba(255, 255, 255, 0.05);
}

.navbar__link--cta {
  background: var(--gradient-accent);
  color: white !important;
  padding: 8px 20px;
}

.navbar__link--cta:hover {
  box-shadow: 0 4px 20px rgba(108, 99, 255, 0.3);
  background: var(--gradient-accent);
}

.navbar__burger {
  display: none;
  flex-direction: column;
  width: 1.5rem;
  cursor: pointer;
  gap: 5px;
  z-index: 1001;
}

.navbar__burger span {
  display: block;
  width: 100%;
  height: 2px;
  background-color: var(--text-primary);
  transition: var(--transition-normal);
  border-radius: 2px;
}

.navbar__burger.active span:nth-child(1) {
  transform: rotate(45deg) translate(4px, 5px);
}

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

.navbar__burger.active span:nth-child(3) {
  transform: rotate(-45deg) translate(4px, -5px);
}

.navbar__menu {
  position: fixed;
  top: 72px;
  left: 0;
  right: 0;
  display: none;
  background: rgba(10, 10, 15, 0.95);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  padding: 20px;
  border-bottom: 1px solid var(--border-color);
}

.navbar__menu.active {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
}

.navbar__menu .navbar__link {
  font-size: 1.1rem;
  padding: 12px 20px;
}

/* ===== Hero Section ===== */
.header {
  min-height: 100vh;
  background: var(--bg-primary);
  position: relative;
  overflow: hidden;
}

.header::before {
  content: "";
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background:
    radial-gradient(
      circle at 30% 40%,
      rgba(108, 99, 255, 0.08) 0%,
      transparent 50%
    ),
    radial-gradient(
      circle at 70% 60%,
      rgba(168, 85, 247, 0.06) 0%,
      transparent 50%
    );
  animation: bgPulse 15s ease-in-out infinite;
}

@keyframes bgPulse {
  0%,
  100% {
    transform: translate(0, 0) scale(1);
  }
  50% {
    transform: translate(-2%, -2%) scale(1.05);
  }
}

.hero {
  position: relative;
  z-index: 1;
  padding-top: 72px;
  min-height: 100vh;
  display: flex;
  align-items: center;
}

.hero__container {
  width: min(100% - 48px, var(--container-max));
  margin-inline: auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.hero__greeting {
  font-size: 1.1rem;
  color: var(--accent-light);
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 12px;
}

.hero__title {
  font-size: clamp(2.5rem, 5vw, 4rem);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -0.03em;
  margin-bottom: 8px;
}

.hero__name {
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero__role {
  font-size: clamp(1.3rem, 2.5vw, 1.8rem);
  color: var(--text-secondary);
  font-weight: 600;
  margin-bottom: 20px;
}

.hero__descr {
  font-size: 1.1rem;
  color: var(--text-muted);
  max-width: 460px;
  line-height: 1.7;
  margin-bottom: 36px;
}

.hero__actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 48px;
}

.hero__socials {
  display: flex;
  gap: 16px;
}

.hero__social-link {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  font-size: 1.2rem;
  transition: all var(--transition-normal);
}

.hero__social-link:hover {
  color: var(--accent);
  border-color: var(--accent);
  background: rgba(108, 99, 255, 0.1);
  transform: translateY(-3px);
}

/* ===== Hero Code Block ===== */
.hero__visual {
  position: relative;
  display: flex;
  justify-content: center;
}

.hero__glow {
  position: absolute;
  width: 300px;
  height: 300px;
  background: radial-gradient(circle, var(--accent-glow) 0%, transparent 70%);
  border-radius: 50%;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  filter: blur(60px);
  animation: glowPulse 4s ease-in-out infinite;
}

@keyframes glowPulse {
  0%,
  100% {
    opacity: 0.5;
    transform: translate(-50%, -50%) scale(1);
  }
  50% {
    opacity: 0.8;
    transform: translate(-50%, -50%) scale(1.1);
  }
}

.hero__code-block {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  overflow: hidden;
  width: 100%;
  max-width: 480px;
  position: relative;
  box-shadow: var(--shadow-lg), var(--shadow-glow);
}

.code-header {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 14px 20px;
  background: rgba(255, 255, 255, 0.03);
  border-bottom: 1px solid var(--border-color);
}

.code-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
}

.code-dot--red {
  background: #ff5f57;
}
.code-dot--yellow {
  background: #ffbd2e;
}
.code-dot--green {
  background: #28c840;
}

.code-filename {
  margin-left: 12px;
  color: var(--text-muted);
  font-size: 0.8rem;
  font-family: "SF Mono", "Fira Code", monospace;
}

.code-content {
  padding: 24px;
  font-family: "SF Mono", "Fira Code", "Cascadia Code", monospace;
  font-size: 0.85rem;
  line-height: 1.8;
  color: var(--text-secondary);
  overflow-x: auto;
}

.code-content code {
  font-family: inherit;
}

.code-keyword {
  color: #c792ea;
}
.code-variable {
  color: #82aaff;
}
.code-property {
  color: #f78c6c;
}
.code-string {
  color: #c3e88d;
}
.code-method {
  color: #82aaff;
}
.code-boolean {
  color: #ff5370;
}

/* ===== Section Styling ===== */
.section__header {
  text-align: center;
  margin-bottom: 60px;
}

.section__tag {
  display: inline-block;
  padding: 6px 16px;
  background: rgba(108, 99, 255, 0.1);
  border: 1px solid var(--border-accent);
  border-radius: 50px;
  color: var(--accent-light);
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 16px;
}

.section__title {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--text-primary);
  margin-bottom: 12px;
}

.section__subtitle {
  font-size: 1.1rem;
  color: var(--text-muted);
  max-width: 500px;
  margin-inline: auto;
}

/* ===== Projects Section ===== */
.projects {
  padding: 100px 0;
  background: var(--bg-secondary);
  position: relative;
}

.projects::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(
    90deg,
    transparent,
    var(--border-accent),
    transparent
  );
}

.projects__grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 24px;
}

.project {
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  transition: all var(--transition-normal);
}

.project.demo::after {
  content: "In Progress...";
  position: absolute;
  top: 12px;
  right: 12px;
  background: rgba(100, 100, 101, 0.85);
  color: white;
  font-size: 0.75rem;
  padding: 4px 10px;
  border-radius: var(--radius-sm);
  font-weight: 600;
}

.project:hover {
  transform: translateY(-8px);
  border-color: var(--border-accent);
  box-shadow: var(--shadow-md), var(--shadow-glow);
}

.project__link {
  display: block;
}

.project__img-wrapper {
  position: relative;
  overflow: hidden;
  aspect-ratio: 16 / 10;
}

.project__img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

.project:hover .project__img {
  transform: scale(1.05);
}

.project__overlay {
  position: absolute;
  display: flex;
  gap: 12px;
  inset: 0;
  background: rgba(108, 99, 255, 0.85);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity var(--transition-normal);
}

.project__overlay.demo {
  background: rgba(100, 100, 101, 0.85);
}

.project:hover .project__overlay {
  opacity: 1;
}

.project__view-btn {
  color: white;
  font-weight: 600;
  font-size: 0.95rem;
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 24px;
  border: 2px solid white;
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
}

/* .project__view-btn.github {
  padding: 16px 18px;
} */

.project__view-btn.github i {
  font-size: 22px;
  padding: 2px 2px;
}

.project__view-btn:hover {
  background-color: white;
  color: var(--accent);
}

.project__info {
  padding: 20px 24px;
}

.project__title {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 4px;
}

.project__tech {
  font-size: 0.85rem;
  color: var(--text-muted);
  font-weight: 500;
}

/* ===== Skills Section ===== */
.skills {
  padding: 100px 0;
  background: var(--bg-primary);
  position: relative;
}

.skills__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 24px;
}

.skills__category {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 32px;
  transition: all var(--transition-normal);
}

.skills__category:hover {
  border-color: var(--border-accent);
  box-shadow: var(--shadow-glow);
}

.skills__category-title {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 20px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.skills__category-title i {
  color: var(--accent);
  font-size: 1.2rem;
}

.skills__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.skill-tag {
  display: inline-block;
  padding: 8px 16px;
  background: rgba(108, 99, 255, 0.08);
  border: 1px solid rgba(108, 99, 255, 0.15);
  border-radius: 50px;
  color: var(--text-secondary);
  font-size: 0.85rem;
  font-weight: 500;
  transition: all var(--transition-fast);
  cursor: default;
}

.skill-tag:hover {
  background: rgba(108, 99, 255, 0.15);
  color: var(--accent-light);
  border-color: var(--border-accent);
  transform: translateY(-2px);
}

/* ===== Certificates Section ===== */
.certificates {
  padding: 100px 0;
  background: var(--bg-secondary);
  position: relative;
}

.certificates::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(
    90deg,
    transparent,
    var(--border-accent),
    transparent
  );
}

.certificates__grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(500px, 1fr));
  gap: 24px;
  justify-items: center;
}

.certificate {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  padding: 40px;
  display: flex;
  gap: 28px;
  transition: all var(--transition-normal);
  max-width: 700px;
  width: 100%;
  position: relative;
  overflow: hidden;
}

.certificate::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--gradient-accent);
}

.certificate:hover {
  border-color: var(--border-accent);
  box-shadow: var(--shadow-md), var(--shadow-glow);
  transform: translateY(-4px);
}

.certificate__icon {
  display: flex;
  align-items: flex-start;
  justify-content: center;
  flex-shrink: 0;
  width: 64px;
  height: 64px;
  background: var(--gradient-accent);
  border-radius: var(--radius-md);
  font-size: 1.8rem;
  color: white;
  padding-top: 14px;
}

.certificate__content {
  flex: 1;
}

.certificate__title {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 8px;
}

.certificate__issuer {
  font-size: 0.9rem;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 6px;
  margin-bottom: 16px;
}

.certificate__issuer i {
  color: var(--accent);
}

.certificate__description {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 20px;
}

.certificate__skills {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 24px;
}

.certificate__skill-tag {
  display: inline-block;
  padding: 4px 12px;
  background: rgba(108, 99, 255, 0.1);
  border: 1px solid rgba(108, 99, 255, 0.2);
  border-radius: 50px;
  color: var(--accent-light);
  font-size: 0.78rem;
  font-weight: 600;
}

.certificate__link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 24px;
  background: rgba(108, 99, 255, 0.1);
  border: 1px solid var(--border-accent);
  border-radius: var(--radius-sm);
  color: var(--accent-light);
  font-weight: 600;
  font-size: 0.9rem;
  transition: all var(--transition-normal);
}

.certificate__link:hover {
  background: var(--gradient-accent);
  color: white;
  border-color: transparent;
  transform: translateY(-2px);
  box-shadow: 0 4px 20px rgba(108, 99, 255, 0.3);
}

/* ===== Footer ===== */
.footer {
  padding: 60px 0 40px;
  background: var(--bg-primary);
  border-top: 1px solid var(--border-color);
}

.footer__container {
  width: min(100% - 48px, var(--container-max));
  margin-inline: auto;
}

.footer__content {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 24px;
}

.footer__brand {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
}

.footer__logo {
  font-size: 1.4rem;
  font-weight: 800;
  color: var(--text-primary);
}

.footer__tagline {
  color: var(--text-muted);
  font-size: 0.9rem;
}

.footer__socials {
  display: flex;
  gap: 16px;
}

.footer__social-link {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  font-size: 1.2rem;
  transition: all var(--transition-normal);
}

.footer__social-link:hover {
  color: var(--accent);
  border-color: var(--accent);
  background: rgba(108, 99, 255, 0.1);
  transform: translateY(-3px);
}

.footer__copyright {
  color: var(--text-muted);
  font-size: 0.85rem;
}

/* ===== Responsive ===== */
@media (max-width: 900px) {
  .hero {
    margin: 40px 0;
  }
  .hero__container {
    justify-content: center;
    grid-template-columns: 1fr;
    text-align: center;
    gap: 40px;
  }

  .hero__content {
    width: calc(100% - 48px);
    margin: 0 auto;
    display: flex;
    justify-content: center;
    align-items: center;
    flex-direction: column;
  }

  .hero__visual {
    display: none;
    width: calc(100% - 48px);
    margin: 0 auto;
    justify-content: center;
    align-items: center;
    flex-direction: column;
  }

  .hero__descr {
    margin-inline: auto;
  }

  .hero__actions {
    justify-content: center;
  }

  .hero__socials {
    justify-content: center;
  }

  .hero__code-block {
    max-width: 420px;
    margin-inline: auto;
  }

  .projects__grid {
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  }

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

@media (max-width: 640px) {
  .navbar__list {
    display: none;
  }

  .navbar__burger {
    display: flex;
  }

  .hero__title {
    font-size: 2rem;
  }

  .hero__role {
    font-size: 1.2rem;
  }

  .hero__code-block {
    max-width: 100%;
  }

  .code-content {
    font-size: 0.75rem;
    padding: 16px;
  }

  .section__title {
    font-size: 1.8rem;
  }

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

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

  .certificate {
    flex-direction: column;
    padding: 28px;
    gap: 20px;
  }

  .certificate__icon {
    width: 52px;
    height: 52px;
    font-size: 1.4rem;
    padding-top: 10px;
  }

  .btn {
    padding: 12px 22px;
    font-size: 0.9rem;
  }
}

@media (max-width: 380px) {
  .hero__actions {
    flex-direction: column;
    align-items: center;
  }

  .btn {
    width: 100%;
  }
}