/**
 * Base Styles - Global Resets and Typography
 * Playful Geometric Design System
 */

/* ========== Global Reset ========== */

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

html {
  scroll-behavior: smooth;
}

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-fg);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  padding: var(--spacing-4);
  min-height: 100vh;
  position: relative;
}

/* Playful dot grid background pattern */
body::before {
  content: "";
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-image: radial-gradient(
    circle,
    var(--color-border) 1px,
    transparent 1px
  );
  background-size: 24px 24px;
  opacity: 0.4;
  pointer-events: none;
  z-index: 0;
}

body > * {
  position: relative;
  z-index: 1;
}

/* ========== Typography ========== */

h1,
h2,
h3,
h4,
h5,
h6 {
  font-family: var(--font-display);
  font-weight: var(--font-weight-extrabold);
  line-height: var(--line-height-tight);
  color: var(--color-fg);
  margin-bottom: var(--spacing-4);
}

h1 {
  font-size: var(--font-size-4xl);
  position: relative;
  display: inline-block;
}

/* Squiggle decoration under h1 */
h1::after {
  content: "";
  position: absolute;
  bottom: -8px;
  left: 0;
  width: 100%;
  height: 4px;
  background-image: url("data:image/svg+xml,%3Csvg width='100' height='4' viewBox='0 0 100 4' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M0 2 Q 5 0, 10 2 T 20 2 T 30 2 T 40 2 T 50 2 T 60 2 T 70 2 T 80 2 T 90 2 T 100 2' stroke='%238B5CF6' stroke-width='2' fill='none'/%3E%3C/svg%3E");
  background-repeat: repeat-x;
  background-size: 100px 4px;
}

h2 {
  font-size: var(--font-size-3xl);
}

h3 {
  font-size: var(--font-size-2xl);
}

p {
  margin-bottom: var(--spacing-4);
}

/* ========== Links ========== */

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

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

a:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
  border-radius: var(--radius-small);
}

/* ========== Buttons Reset ========== */

button {
  font-family: inherit;
  font-size: inherit;
  line-height: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

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

/* ========== Inputs Reset ========== */

input,
textarea,
select {
  font-family: inherit;
  font-size: inherit;
  line-height: inherit;
  color: inherit;
}

input:focus,
textarea:focus,
select:focus {
  outline: none;
}

/* ========== Accessibility ========== */

/* Focus visible for keyboard navigation */
:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

/* Skip to content link */
.skip-to-content {
  position: absolute;
  top: -40px;
  left: 0;
  background: var(--color-accent);
  color: white;
  padding: var(--spacing-2) var(--spacing-4);
  border-radius: var(--radius-base);
  z-index: var(--z-tooltip);
}

.skip-to-content:focus {
  top: var(--spacing-2);
}

/* 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-width: 0;
}

/* ========== Scrollbar Styling - Playful ========== */

::-webkit-scrollbar {
  width: 14px;
  height: 14px;
}

::-webkit-scrollbar-track {
  background: var(--color-bg);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-sm);
}

::-webkit-scrollbar-thumb {
  background: var(--color-accent);
  border-radius: var(--radius-sm);
  border: 2px solid var(--color-fg);
  box-shadow: var(--shadow-small);
}

::-webkit-scrollbar-thumb:hover {
  background: var(--color-accent-light);
  box-shadow: var(--shadow-small-hover);
}

/* ========== Selection ========== */

::selection {
  background: var(--color-tertiary);
  color: var(--color-fg);
}

::-moz-selection {
  background: var(--color-tertiary);
  color: var(--color-fg);
}

/* ========== Reduced Motion ========== */

@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;
  }
}