/* Base Styles - Technical Elegance Design System
   Reset, Element Defaults & Global Styles
*/

/* ===== Reset ===== */
*,
*::before,
*::after {
  box-sizing: border-box;
}

* {
  margin: 0;
  padding: 0;
}

/* ===== Root & Scroll ===== */
html {
  scroll-behavior: smooth;
  font-size: 16px;
}

/* ===== Body ===== */
body {
  font-family: var(--font-body);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-normal);
  line-height: var(--line-height-normal);
  color: var(--color-white);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
  position: relative;
}

/* Film grain texture overlay */
body::before {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 9999;
  opacity: var(--grain-opacity);
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)'/%3E%3C/svg%3E");
}

/* ===== Typography ===== */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: var(--font-weight-normal);
  line-height: var(--line-height-tight);
  color: var(--color-white);
  letter-spacing: var(--letter-spacing-tight);
}

h1 {
  font-size: var(--font-size-6xl);
  line-height: var(--line-height-tight);
}

h2 {
  font-size: var(--font-size-5xl);
  line-height: var(--line-height-snug);
}

h3 {
  font-size: var(--font-size-3xl);
  font-family: var(--font-body);
  font-weight: var(--font-weight-semibold);
  letter-spacing: var(--letter-spacing-normal);
}

h4 {
  font-size: var(--font-size-xl);
  font-family: var(--font-body);
  font-weight: var(--font-weight-semibold);
  letter-spacing: var(--letter-spacing-normal);
}

p {
  color: var(--color-white-60);
  line-height: var(--line-height-relaxed);
}

/* Large lead text */
.lead {
  font-size: var(--font-size-xl);
  color: var(--color-white-60);
  line-height: var(--line-height-relaxed);
}

/* Small text */
small, .text-sm {
  font-size: var(--font-size-sm);
}

/* Monospace / Technical text */
code, .mono {
  font-family: var(--font-mono);
  font-size: 0.9em;
}

/* Italic accent for display text */
.italic, em {
  font-style: italic;
}

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

a:hover {
  color: var(--color-primary-light);
}

/* Underline link style */
.link-underline {
  position: relative;
  color: var(--color-white);
}

.link-underline::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 100%;
  height: 1px;
  background: var(--color-primary);
  transform: scaleX(0);
  transform-origin: right;
  transition: transform var(--transition-normal);
}

.link-underline:hover::after {
  transform: scaleX(1);
  transform-origin: left;
}

/* ===== Lists ===== */
ul, ol {
  list-style: none;
}

/* ===== Images ===== */
img {
  max-width: 100%;
  height: auto;
  display: block;
}

/* ===== Form Elements ===== */
input,
textarea,
button,
select {
  font-family: inherit;
  font-size: inherit;
}

button {
  cursor: pointer;
  border: none;
  background: none;
}

/* ===== Selection ===== */
::selection {
  background: var(--color-primary);
  color: var(--color-white);
}

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

/* ===== Layout Containers ===== */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--container-padding);
}

.container-narrow {
  max-width: var(--container-narrow);
}

.container-wide {
  max-width: var(--container-wide);
}

/* ===== Sections ===== */
.section {
  padding: var(--space-32) 0;
  position: relative;
}

@media (max-width: 768px) {
  .section {
    padding: var(--space-20) 0;
  }
}

/* ===== Decorative Elements ===== */
/* Horizontal rule */
hr, .divider {
  border: none;
  height: 1px;
  background: var(--glass-border);
  margin: var(--space-16) 0;
}

/* Decorative line accent */
.accent-line {
  width: 60px;
  height: 2px;
  background: var(--gradient-pink-navy);
  margin-bottom: var(--space-6);
}

/* Pink dot accent */
.dot-accent {
  color: var(--color-primary);
}

/* ===== Utility Classes ===== */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.text-primary { color: var(--color-primary); }
.text-muted { color: var(--color-white-40); }
.text-white { color: var(--color-white); }

.font-display { font-family: var(--font-display); }
.font-body { font-family: var(--font-body); }
.font-mono { font-family: var(--font-mono); }

.uppercase {
  text-transform: uppercase;
  letter-spacing: var(--letter-spacing-wider);
}

/* Screen reader only */
.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;
}

/* ===== Scroll Reveal Animations ===== */
.reveal {
  opacity: 0;
  transform: translateY(40px);
  transition:
    opacity var(--transition-slower),
    transform var(--transition-slower);
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

.reveal-left {
  opacity: 0;
  transform: translateX(-40px);
  transition:
    opacity var(--transition-slower),
    transform var(--transition-slower);
}

.reveal-left.visible {
  opacity: 1;
  transform: translateX(0);
}

.reveal-right {
  opacity: 0;
  transform: translateX(40px);
  transition:
    opacity var(--transition-slower),
    transform var(--transition-slower);
}

.reveal-right.visible {
  opacity: 1;
  transform: translateX(0);
}

/* Stagger children animations */
.stagger-children > * {
  opacity: 0;
  transform: translateY(20px);
  transition:
    opacity var(--transition-slow),
    transform var(--transition-slow);
}

.stagger-children.visible > *:nth-child(1) { transition-delay: 0ms; }
.stagger-children.visible > *:nth-child(2) { transition-delay: 80ms; }
.stagger-children.visible > *:nth-child(3) { transition-delay: 160ms; }
.stagger-children.visible > *:nth-child(4) { transition-delay: 240ms; }
.stagger-children.visible > *:nth-child(5) { transition-delay: 320ms; }
.stagger-children.visible > *:nth-child(6) { transition-delay: 400ms; }
.stagger-children.visible > *:nth-child(7) { transition-delay: 480ms; }
.stagger-children.visible > *:nth-child(8) { transition-delay: 560ms; }

.stagger-children.visible > * {
  opacity: 1;
  transform: translateY(0);
}

/* Fade in for simpler reveals */
.fade-in {
  opacity: 0;
  transform: translateY(24px);
  transition:
    opacity var(--transition-slow),
    transform var(--transition-slow);
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ===== Background Decorations ===== */
.bg-gradient-radial {
  position: absolute;
  width: 800px;
  height: 800px;
  border-radius: 50%;
  filter: blur(120px);
  pointer-events: none;
}

.bg-gradient-pink {
  background: var(--color-primary-20);
}

.bg-gradient-navy {
  background: var(--color-secondary-40);
}