/* ========================================
   BASE STYLES
   ======================================== */

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  scroll-padding-top: 80px;
}

body {
  font-family: var(--font-primary);
  font-weight: var(--font-primary-weight-regular);
  line-height: var(--leading-normal);
  color: var(--color-white);
  background-color: var(--color-black);
  min-height: 100vh;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* === TYPOGRAPHY BASE === */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-primary);
  font-weight: var(--font-primary-weight-bold);
  line-height: var(--leading-tight);
  margin-bottom: var(--space-md);
  color: var(--color-white);
}

h1 {
  font-size: var(--text-6xl);
  font-weight: var(--font-primary-weight-black);
}

h2 {
  font-size: var(--text-5xl);
  font-weight: var(--font-primary-weight-extrabold);
}

h3 {
  font-size: var(--text-4xl);
  font-weight: var(--font-primary-weight-bold);
}

h4 {
  font-size: var(--text-3xl);
  font-weight: var(--font-primary-weight-semibold);
}

h5 {
  font-size: var(--text-2xl);
  font-weight: var(--font-primary-weight-medium);
}

h6 {
  font-size: var(--text-xl);
  font-weight: var(--font-primary-weight-medium);
}

p {
  font-family: var(--font-primary);
  font-weight: var(--font-primary-weight-regular);
  line-height: var(--leading-relaxed);
  margin-bottom: var(--space-md);
  color: var(--color-gray-200);
}

/* === LINKS === */
a {
  color: var(--color-neural-primary);
  text-decoration: none;
  transition: var(--transition-all);
}

a:hover {
  color: var(--color-neural-accent);
  text-shadow: 0 0 8px var(--color-neural-glow);
}

/* === LISTS === */
ul, ol {
  margin-bottom: var(--space-md);
  padding-left: var(--space-xl);
}

li {
  font-family: var(--font-primary);
  font-weight: var(--font-primary-weight-regular);
  line-height: var(--leading-relaxed);
  color: var(--color-gray-200);
  margin-bottom: var(--space-sm);
}

/* === RESPONSIVE TYPOGRAPHY === */
@media (max-width: 768px) {
  html {
    font-size: 14px;
  }
  
  h1 {
    font-size: var(--text-5xl);
  }
  
  h2 {
    font-size: var(--text-4xl);
  }
  
  h3 {
    font-size: var(--text-3xl);
  }
  
  h4 {
    font-size: var(--text-2xl);
  }
}

@media (max-width: 480px) {
  html {
    font-size: 13px;
  }
  
  h1 {
    font-size: var(--text-4xl);
  }
  
  h2 {
    font-size: var(--text-3xl);
  }
  
  h3 {
    font-size: var(--text-2xl);
  }
}

/* === LAYOUT HELPERS === */
.container {
  max-width: var(--container-7xl);
  margin: 0 auto;
  padding: 0 var(--space-md);
}

@media (min-width: 768px) {
  .container {
    padding: 0 var(--space-xl);
  }
}

@media (min-width: 1024px) {
  .container {
    padding: 0 var(--space-2xl);
  }
}

.section {
  padding: var(--space-5xl) 0;
  position: relative;
  z-index: 2;
  pointer-events: none;
}

.section * {
  pointer-events: auto;
}

@media (max-width: 768px) {
  .section {
    padding: var(--space-4xl) 0;
  }
}

/* === VISUAL HELPERS === */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.text-center {
  text-align: center;
}

.text-left {
  text-align: left;
}

.text-right {
  text-align: right;
}

/* === SELECTION === */
::selection {
  background-color: var(--color-neural-primary);
  color: var(--color-black);
}

::-moz-selection {
  background-color: var(--color-neural-primary);
  color: var(--color-black);
}

/* === SCROLLBAR === */
::-webkit-scrollbar {
  width: 8px;
}

::-webkit-scrollbar-track {
  background: var(--color-gray-900);
}

::-webkit-scrollbar-thumb {
  background: var(--color-neural-primary);
  border-radius: var(--radius-full);
}

::-webkit-scrollbar-thumb:hover {
  background: var(--color-neural-accent);
}

/* === FOCUS STYLES === */
:focus {
  outline: 2px solid var(--color-neural-primary);
  outline-offset: 2px;
}

:focus:not(:focus-visible) {
  outline: none;
}

:focus-visible {
  outline: 2px solid var(--color-neural-primary);
  outline-offset: 2px;
}

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