/**
 * BASE & GLOBAL STYLES
 */

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  color-scheme: dark;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  min-height: 100vh;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  font-family: var(--font-family-sans);
  font-size: var(--text-base);
  line-height: 1.6;
  overflow-x: hidden;
  position: relative;
}

/* Background Atmosphere Grid Texture */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  background: 
    radial-gradient(circle at 50% 0%, rgba(255, 42, 75, 0.05) 0%, transparent 60%),
    radial-gradient(circle at 100% 80%, rgba(0, 210, 255, 0.03) 0%, transparent 40%);
  pointer-events: none;
  z-index: 0;
}

/* Custom Scrollbars */
::-webkit-scrollbar {
  width: 9px;
  height: 9px;
}

::-webkit-scrollbar-track {
  background: var(--bg-secondary);
}

::-webkit-scrollbar-thumb {
  background: #252838;
  border-radius: var(--radius-full);
  border: 2px solid var(--bg-secondary);
}

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

/* Typography Defaults */
h1, h2, h3, h4, h5, h6 {
  color: var(--text-primary);
  font-weight: var(--font-weight-bold);
  line-height: 1.25;
  letter-spacing: -0.02em;
}

h1 { font-size: clamp(2rem, 4vw, 3.25rem); }
h2 { font-size: clamp(1.5rem, 3vw, 2.25rem); }
h3 { font-size: clamp(1.2rem, 2vw, 1.5rem); }
h4 { font-size: var(--text-lg); }

p {
  color: var(--text-secondary);
  margin-bottom: var(--space-3);
}

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

img, video, canvas, svg {
  display: block;
  max-width: 100%;
}

button, input, select, textarea {
  font-family: inherit;
  font-size: inherit;
  color: inherit;
  border: none;
  outline: none;
  background: none;
}

/* Accessibility Focus States */
:focus-visible {
  outline: 2px solid var(--accent-primary);
  outline-offset: 3px;
}

/* Container & Layout Utilities */
.container {
  width: 100%;
  max-width: var(--container-max-w);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--space-6);
  padding-right: var(--space-6);
  position: relative;
  z-index: 1;
}

@media (max-width: 768px) {
  .container {
    padding-left: var(--space-4);
    padding-right: var(--space-4);
  }
}

.section {
  padding-top: var(--space-16);
  padding-bottom: var(--space-16);
  position: relative;
  z-index: 1;
}

.section-header {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  margin-bottom: var(--space-8);
  gap: var(--space-4);
  flex-wrap: wrap;
}

.section-title-wrap {
  max-width: 650px;
}

.section-tag {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-xs);
  font-weight: var(--font-weight-bold);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--accent-primary);
  margin-bottom: var(--space-2);
}

.section-tag::before {
  content: "";
  display: inline-block;
  width: 6px;
  height: 6px;
  background: var(--accent-primary);
  border-radius: var(--radius-full);
  box-shadow: 0 0 8px var(--accent-primary);
}

.section-title {
  font-size: clamp(1.75rem, 2.5vw, 2.25rem);
  font-weight: var(--font-weight-black);
  letter-spacing: -0.02em;
}

.section-subtitle {
  font-size: var(--text-sm);
  color: var(--text-muted);
  margin-top: var(--space-2);
  margin-bottom: 0;
}

/* App root container */
#app {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

main#main-content {
  flex: 1;
  position: relative;
  z-index: 1;
}