/* ========== CSS Reset ========== */

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

html {
  font-size: 100%;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

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

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

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: var(--font-bold);
  line-height: var(--leading-tight);
  color: var(--color-text-primary);
}

h1 { font-size: var(--text-5xl); }
h2 { font-size: var(--text-4xl); }
h3 { font-size: var(--text-3xl); }
h4 { font-size: var(--text-2xl); }
h5 { font-size: var(--text-xl); }
h6 { font-size: var(--text-lg); }

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

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

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

strong, b { font-weight: var(--font-semibold); }
em, i { font-style: italic; }
small { font-size: var(--text-sm); }

code, pre {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
}

code {
  background: var(--color-surface);
  padding: 0.125rem 0.375rem;
  border-radius: var(--radius-sm);
}

pre {
  background: var(--color-surface);
  padding: var(--space-md);
  border-radius: var(--radius-md);
  overflow-x: auto;
  white-space: pre-wrap;
  word-wrap: break-word;
}

pre code {
  background: none;
  padding: 0;
}

/* ========== Lists ========== */

ul, ol {
  list-style: none;
}

/* ========== Images ========== */

img, video {
  max-width: 100%;
  height: auto;
  display: block;
}

/* ========== Forms ========== */

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

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

input,
textarea {
  background: transparent;
  border: none;
  outline: none;
}

input::placeholder,
textarea::placeholder {
  color: var(--color-text-muted);
}

/* ========== Tables ========== */

table {
  border-collapse: collapse;
  width: 100%;
}

th, td {
  text-align: left;
  padding: var(--space-sm) var(--space-md);
}

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

::selection {
  background: var(--color-primary-purple);
  color: var(--color-text-primary);
}

::-moz-selection {
  background: var(--color-primary-purple);
  color: var(--color-text-primary);
}

/* ========== Focus Styles ========== */

:focus {
  outline: none;
}

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

/* ========== Scrollbar ========== */

::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

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

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

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

/* ========== Utility Classes ========== */

.container {
  width: 100%;
  max-width: var(--container-max-width);
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

.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;
}

.hidden {
  display: none !important;
}

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

.text-gradient {
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ========== Skip Link (Accessibility) ========== */

.skip-link {
  position: absolute;
  top: -100%;
  left: var(--space-md);
  z-index: var(--z-toast);
  padding: var(--space-sm) var(--space-md);
  background: var(--color-primary-purple);
  color: var(--color-text-primary);
  border-radius: var(--radius-md);
  transition: top var(--duration-fast) var(--ease-smooth);
}

.skip-link:focus {
  top: var(--space-md);
}