:root {
  /* Primary Colors */
  --color-black: #ffffff;
  --color-dark-gray-1: #f5f5f5;
  --color-dark-gray-2: #e5e5e5;

  /* Accent Colors */
  --color-purple-1: #000000;
  --color-purple-2: #333333;
  --color-purple-3: #666666;

  /* Secondary Accents */
  --color-cyan: #000000;
  --color-magenta: #333333;
  --color-dim: #cccccc;
  --color-accent: #000000;

  /* Text Colors */
  --color-text-white: #000000;
  --color-text-dim: #666666;
  --color-text-muted: rgba(0, 0, 0, 0.6);
  --color-text-bg-blur: rgba(255, 255, 255, 0.1);
  --color-button-text: #ffffff;

  /* Accent with opacity */
  --color-accent-bg: rgba(0, 0, 0, 0.18);
  --color-accent-glow: rgba(0, 0, 0, 0.25);
  --color-accent-shadow: rgba(0, 0, 0, 0.3);

  /* Semantic Colors */
  --color-error: #cc0000;
  --color-progress-start: #000000;
  --color-progress-end: #333333;
  --color-overlay-bg: rgba(255, 255, 255, 0.95);
  --color-spinner-track: rgba(0, 0, 0, 0.2);
  --color-spinner-fill: #000000;
  --color-progress-text: #333333;
  --color-progress-bar-bg: rgba(0, 0, 0, 0.05);
  --color-progress-track: rgba(0, 0, 0, 0.1);
  --color-text-on-light: #000000;
  --color-accent-on-light: #333333;

  /* Typography */
  --font-mono: 'JetBrains Mono', 'Fira Code', 'Courier New', monospace;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-mono);
  background-color: var(--color-black);
  color: var(--color-text-white);
  line-height: 1.6;
  overflow-x: hidden;
}

.container {
  max-width: 1400px;
  margin: 0 auto;
}

.navbar {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  width: 100%;
}

.navbar-fixed {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 999;
  padding: 1rem 2rem;
  background: transparent;
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  -webkit-mask-image: linear-gradient(to bottom, black 40%, transparent 100%);
  mask-image: linear-gradient(to bottom, black 40%, transparent 100%);
  padding-bottom: 2rem;
  transition: transform 0.3s ease;
}

.navbar-hidden {
  transform: translateY(-100%);
}

.navbar-hamburger {
  display: none;
}

.navbar-links {
  display: flex;
  gap: 2rem;
  align-items: center;
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.navbar-link {
  color: var(--color-text-muted);
  text-decoration: none;
  transition: color 0.3s ease;
  position: relative;
  padding: 0.25rem 0;
}

.navbar-link:hover {
  color: var(--color-accent);
}

.navbar-link-active {
  color: var(--color-accent);
}

.navbar-link-active::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--color-accent);
}

@media (max-width: 768px) {
  .navbar-fixed {
    -webkit-mask-image: none;
    mask-image: none;
    -webkit-backdrop-filter: none;
    backdrop-filter: none;
    background: var(--color-black);
    padding-bottom: 1rem;
  }

  .navbar-hamburger {
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
    z-index: 1001;
  }

  .navbar-hamburger-line {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--color-text-white);
    transition: transform 0.3s ease, opacity 0.3s ease;
  }

  .navbar-hamburger-open .navbar-hamburger-line:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
  }

  .navbar-hamburger-open .navbar-hamburger-line:nth-child(2) {
    opacity: 0;
  }

  .navbar-hamburger-open .navbar-hamburger-line:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
  }

  .navbar-links {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    flex-direction: column;
    justify-content: center;
    gap: 2rem;
    background: var(--color-black);
    font-size: 1.25rem;
    transform: translateX(100%);
    transition: transform 0.3s ease;
  }

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


.hero {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: 4rem 2rem;
  border-bottom: none;
  position: relative;
  overflow: visible;
  background: var(--color-black);
}

.hero-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 4rem;
  position: sticky;
  top: 4rem;
  z-index: 10;
}

.hero-header-content {
  position: relative;
}

.hero-text-white {
  position: relative;
  z-index: 1;
}

.hero-title {
  font-size: clamp(4rem, 12vw, 8rem);
  line-height: 0.9;
  font-weight: 700;
  text-transform: uppercase;
  margin: 0;
  letter-spacing: -0.05em;
  color: var(--color-text-white);
  transition: background 0.3s ease, padding 0.3s ease;
  position: relative;
  display: inline-block;
  background: var(--color-text-bg-blur);
  backdrop-filter: blur(5px);
  padding: min(0.1em, 5px);
  border-radius: 10px;
}

.hero-text-black .hero-title {
  color: var(--color-black);
}

.hero-tagline {
  font-size: clamp(1.5rem, 4vw, 3rem);
  line-height: 1.2;
  font-weight: 400;
  display: block;
  margin-top: 2rem;
  color: var(--color-text-white);
  transition: background 0.3s ease, padding 0.3s ease;
  white-space: nowrap;
}

.meet-yor-card {
  background: var(--color-dark-gray-2);
  border: 1.5px solid var(--color-purple-3);
  border-radius: 12px;
  padding: 2.5rem 3rem;
  margin-bottom: 4rem;
  max-width: min(65vw, 820px);
  margin-left: auto;
  margin-right: auto;
}

.meet-yor-title {
  font-size: clamp(2.75rem, 5.5vw, 3.85rem);
  font-weight: 700;
  color: var(--color-purple-1);
  margin-bottom: 1.5rem;
  letter-spacing: -0.01em;
}

.meet-yor-desc {
  color: var(--color-text-dim);
  font-size: 1.1rem;
  line-height: 1.7;
}

/* Footer */
.footer {
  padding: 4rem 2rem;
  background: var(--color-dark-gray-1);
  text-align: center;
}

/* Build Section */
.build-section {
  padding: 5rem 2rem;
  background: var(--color-black);
  border-top: 1px solid var(--color-dark-gray-2);
  display: flex;
  justify-content: center;
  align-items: center;
}

.build-card {
  background: var(--color-dark-gray-2);
  border: 1.5px solid var(--color-purple-3);
  border-radius: 12px;
  padding: 2.5rem 3rem;
  max-width: min(65vw, 820px);
  margin: 0 auto;
  width: 100%;
}

.build-title {
  font-size: clamp(2.75rem, 5.5vw, 3.85rem);
  font-weight: 700;
  color: var(--color-purple-1);
  margin-bottom: 1.5rem;
  letter-spacing: -0.01em;
}

.build-desc {
  color: var(--color-text-dim);
  font-size: 1.1rem;
  line-height: 1.7;
  margin-bottom: 2rem;
}

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

.build-btn {
  display: inline-block;
  padding: 0.75rem 1.5rem;
  font-family: var(--font-mono);
  font-size: 0.9rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  text-decoration: none;
  border-radius: 8px;
  transition: all 0.3s ease;
  cursor: pointer;
  background-color: var(--color-purple-1); /* black */
  color: var(--color-black); /* white */
  border: 1.5px solid var(--color-purple-1);
}

.build-btn:hover {
  background-color: transparent;
  color: var(--color-purple-1);
}

.build-btn-secondary {
  background-color: transparent;
  color: var(--color-purple-1);
  border: 1.5px solid var(--color-purple-3); /* grey */
}

.build-btn-secondary:hover {
  background-color: var(--color-purple-1);
  color: var(--color-black);
  border-color: var(--color-purple-1);
}

@media (max-width: 768px) {
  .build-section {
    padding: 3rem 1rem;
  }
  .build-card {
    max-width: 100%;
    padding: 2rem 1.5rem;
  }
}



/* YOR-Dex starter layout, retaining the original template's visual styles. */
.hero { min-height: 72vh; min-height: 72svh; }
.hero-header { position: relative; top: auto; gap: 2rem; }
.hero-header-content { flex-shrink: 0; }
.hero-title { text-transform: none; }
.hero-tagline { white-space: normal; }
.hero-intro { padding-top: 5rem; color: var(--color-text-dim); }
.hero-intro p { margin-bottom: 1.5rem; }
.about-section { padding: 5rem 2rem; }
.meet-yor-card { margin-bottom: 0; }
.resource-status { color: var(--color-text-dim); font-size: 0.9rem; }
section { scroll-margin-top: 6rem; }
a:focus-visible, button:focus-visible { outline: 2px solid currentColor; outline-offset: 5px; }
@media (max-width: 768px) {
  .hero { padding: 2rem 1.5rem; }
  .hero-title { font-size: clamp(2.5rem, 10vw, 4rem); }
  .hero-tagline { font-size: 1.5rem; }
  .hero-header { gap: 0.5rem; }
  .hero-header-content { flex-shrink: 1; min-width: 0; }
  #inline-nav { width: auto; }
  .navbar-links { height: 100dvh; bottom: auto; visibility: hidden; }
  .navbar-links-open { visibility: visible; }
  .navbar-fixed { z-index: 999; }
  .about-section { padding: 3rem 1rem; }
  .meet-yor-card { max-width: 100%; padding: 2rem 1.5rem; }
  .meet-yor-title, .build-title { font-size: clamp(1.75rem, 8vw, 3rem); overflow-wrap: anywhere; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition: none !important; }
}
/* Learning from Humans: use the template's centered content width. */
.learning-section { padding: 5rem 2rem; }
.learning-container { max-width: min(65vw, 820px); margin: 0 auto; }
.learning-title { font-size: clamp(2rem, 4vw, 3.5rem); line-height: 1.2; letter-spacing: -0.01em; margin-bottom: 2rem; }
.learning-video { display: block; width: 100%; border-radius: 12px; background: var(--color-dark-gray-1); }
@media (min-width: 769px) {
  .hero-header { flex-wrap: wrap; }
  #inline-nav { flex: 1 1 460px; }
  .navbar-links { flex-wrap: wrap; }
}
@media (max-width: 768px) {
  .learning-section { padding: 3rem 1rem; }
  .learning-container { max-width: 100%; }
  .learning-title { font-size: clamp(1.75rem, 8vw, 3rem); }
}