html {
  scroll-behavior: smooth;
}

:root {
  --cyan: #00ffff;
  --magenta: #ff00aa;
  --bg: #0c0c0c;
  --font: 'Orbitron', sans-serif;
}

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

body {
  background-color: var(--bg);
  color: var(--cyan);
  font-family: var(--font);
  overflow-x: hidden;
  min-height: 100vh;
  position: relative;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  background-image: url("assets/background.svg");
  background-repeat: repeat;
  background-size: 200px auto;
  opacity: 0.10;
  z-index: 0;
  mix-blend-mode: lighten;
  pointer-events: none;
}

.typing {
  display: block;
  margin: 2rem auto 0 auto;
  text-align: center;
  overflow: hidden;
  white-space: nowrap;
  border-right: 0.15em solid var(--cyan);
  width: 0;
  font-size: clamp(1rem, 5vw, 1.3rem);
  animation:
    typing 3s steps(39, end) forwards,
    blink-caret 0.75s step-end infinite;
  max-width: 100%;
  visibility: hidden;
}

@keyframes typing {
  from { width: 0 }
  to { width: 29ch }
}

@keyframes blink-caret {
  0%, 100% { border-color: transparent }
  50% { border-color: var(--cyan) }
}

.sidebar {
  position: fixed;
  top: 0;
  left: 0;
  width: 220px;
  height: 100%;
  background-color: transparent;
  padding-top: 5rem;
  z-index: 2;
}

.sidebar ul {
  list-style: none;
  padding-left: 2rem;
}

.sidebar li {
  margin: 1.5rem 0;
}

.sidebar a {
  color: var(--cyan);
  text-decoration: none;
  font-weight: 600;
  letter-spacing: 1px;
  font-size: 1rem;
  transition: color 0.2s ease, transform 0.2s ease;
}

.sidebar a:hover {
  color: var(--magenta);
  transform: translateX(5px);
}

.content {
  margin-left: 220px;
  padding: 0 1% 0 1%;
  max-width: 1000px;
  text-align: left;
}

@media (min-width: 1400px) {
  .content {
    margin: 0 auto;
    padding-left: 240px;
  }
}

@media (min-width: 769px) {
  .mobile-menu-button, .mobile-menu {
    display: none;
  }
}

.hero {
  text-align: center;
  margin-top: 2rem;
  padding: 1rem 1rem;
}

.hero-branding {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  margin-bottom: 1rem;
}

.hero-branding img {
  width: 64px;
  height: auto;
  filter: drop-shadow(0 0 6px var(--cyan));
  transition: transform 0.3s ease;
}

.hero-branding img:hover {
  transform: scale(1.05);
}

.hero h1 {
  font-size: 4rem;
  font-weight: 800;
  letter-spacing: -2px;
  text-transform: uppercase;
  display: inline-block;
  display: inline-block;
}

.hero .lux {
  color: var(--cyan);
}

.hero .code {
  color: var(--magenta);
}

.tagline {
  margin-top: 1rem;
  line-height: 1.6;
  color: var(--cyan);
}

.tagline.typing {
  font-size: clamp(0.3rem, 3vw, 1.1rem) !important;
}

section {
  padding: 2rem 2rem;
  background: linear-gradient(to bottom, #0d0d0d, #121212);
  text-align: center;
}

.cta-next-section {
  margin-top: 1.5rem;
  text-align: center;
}

.cta-text {
  font-size: 1.2rem;
  color: var(--cyan);
  font-weight: bold;
  margin-bottom: 0.5rem;
  letter-spacing: 1px;
}

.scroll-cta {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  margin-top: 3rem;
  text-decoration: none;
  color: var(--cyan);
  font-size: 1.3rem;
  font-weight: bold;
  transition: filter 0.3s ease;
}

.scroll-cta:hover {
  filter: drop-shadow(0 0 6px var(--cyan));
}

.scroll-cta img {
  width: 40px;
  height: auto;
  transition: filter 0.3s ease;
}

footer {
  margin-top: 6rem;
  text-align: center;
  padding: 2rem;
  font-size: 0.8rem;
  color: #555;
}

/* MOBILE ADJUSTMENTS */
@media (max-width: 768px) {
  .sidebar {
    display: none !important;
  }

  .content {
    margin: 0 auto !important;
    padding: 2rem 1rem !important;
    max-width: 90% !important;
    text-align: center !important;
  }

  .hero h1 {
    font-size: 2.5rem !important;
    word-break: break-word !important;
  }

  .tagline,
  .section,
  .section .subtitle {
    font-size: 1rem !important;
    text-align: center !important;
  }

  .mobile-menu-button {
    display: block;
  }

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

  .highlight-visuals {
    flex-direction: column;
    gap: 1.5rem;
  }

  .learning-steps {
      flex-direction: column;
      align-items: center;
    }

    .step {
      width: 90%;
    }
}

.mobile-menu-button,
#openMenu {
  position: fixed;
  top: 1rem;
  left: 1rem;
  font-size: 2rem;
  z-index: 999;
  cursor: pointer;
  color: var(--cyan);
}

.mobile-menu {
  position: fixed;
  top: 0;
  left: 0;
  width: 75%;
  max-width: 300px;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.95);
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  padding: 2rem;
  gap: 1.5rem;
  transform: translateX(-100%);
  transition: transform 0.3s ease;
  z-index: 998;
}

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

.mobile-menu a {
  color: var(--cyan);
  text-decoration: none;
  font-size: 1.2rem;
}

#closeMenu {
  align-self: flex-end;
  font-size: 1.8rem;
  cursor: pointer;
  color: var(--magenta);
}

.hero-section {
  padding: 1rem 1rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  background-color: #121212;
}

section h1 {
  font-size: clamp(2rem,2.7rem,4rem);
  text-transform: uppercase;
  letter-spacing: -1px;
  color: var(--magenta);
}

.hero-section .hero-subtitle {
  font-size: clamp(1rem, 2.5vw, 1.3rem);
  margin-top: 1rem;
  color: var(--cyan);
  max-width: 600px;
  line-height: 1.6;
}

.cta-buttons {
  margin-top: 2rem;
}

.cta-buttons .btn {
  background-color: var(--cyan);
  color: #000;
  text-decoration: none;
  padding: 0.8rem 1.6rem;
  border-radius: 5px;
  font-weight: bold;
  transition: background 0.3s ease;
}

.cta-buttons .btn:hover {
  background-color: var(--magenta);
  color: #fff;
}

.hero-cards {
  margin-top: 3rem;
  display: flex;
  gap: 2rem;
  flex-wrap: wrap;
  justify-content: center;
}

.course-card {
  background-color: #111;
  border: 1px solid var(--cyan);
  border-radius: 10px;
  padding: 1rem;
  width: 240px;
  text-align: center;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.course-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 0 10px var(--cyan);
}

.course-card img {
  width: 100%;
  height: auto;
  max-height: clamp(100px, 20vw, 260px);
  object-fit: contain;
  border-radius: 6px;
  margin-bottom: 1rem;
}

.course-card h3 {
  font-size: 1.1rem;
  color: var(--magenta);
  margin-top: 0.5rem;
}

.learning-section {
  border-top: 2px solid var(--magenta);
  border-bottom: 2px solid var(--cyan);
}

section h2 {
  font-size: 2rem;
  color: var(--magenta);
  text-transform: uppercase;
  margin-bottom: 0.5rem;
  text-align: center;
}

.section-subtitle {
  font-size: 1.1rem;
  color: var(--cyan);
  max-width: 700px;
  margin: 0 auto 3rem auto;
  line-height: 1.6;
}

.hero-section .hero-subtitle {
  font-size: clamp(1rem, 2.5vw, 1.3rem);
  margin-top: 1rem;
  color: var(--cyan);
  max-width: 600px;
  line-height: 1.6;
}

.learning-steps {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 2rem;
}

.highlight-cyan {
  color: var(--cyan);
  font-weight: 600;
  font-size: 1rem;
  margin-top: 1rem;
}

.action-button {
  text-align: center;
  margin-top: 2rem;
}

.action-button .btn {
  background-color: var(--magenta);
  color: #fff;
  text-decoration: none;
  padding: 0.9rem 1.8rem;
  border-radius: 6px;
  font-weight: bold;
  font-size: 1rem;
  transition: background 0.3s ease;
  box-shadow: 0 0 10px rgba(255, 0, 170, 0.3);
}

.action-button .btn:hover {
  background-color: var(--cyan);
  color: #000;
  box-shadow: 0 0 12px rgba(0, 255, 255, 0.4);
}

.highlight {
  color: var(--magenta);
}