/* ====================================================
   Base styles & Reset (Light Theme)
   ==================================================== */

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

html {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: var(--leading-normal);
  color: var(--text-primary);
  background-color: var(--bg-base);
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background: var(--gradient-apple-bg);
  background-attachment: fixed;
}

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

h1 { font-size: var(--text-4xl); }
h2 { font-size: var(--text-3xl); letter-spacing: -0.02em; }
h3 { font-size: var(--text-2xl); }
h4 { font-size: var(--text-xl); }

p {
  color: var(--text-secondary);
  margin-bottom: var(--space-4);
}
p:last-child { margin-bottom: 0; }

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--transition-fast);
}
a:hover {
  color: var(--color-primary-dark);
}

code {
  font-family: var(--font-mono);
  font-size: 0.9em;
  background: var(--bg-surface-2);
  color: var(--color-primary-dark);
  padding: 2px 6px;
  border-radius: var(--border-radius-sm);
}

/* Utilitaires globaux */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }
.text-muted { color: var(--text-muted); }
.text-sm { font-size: var(--text-sm); }
.text-xs { font-size: var(--text-xs); }
.font-bold { font-weight: var(--font-bold); }
.font-semibold { font-weight: var(--font-semibold); }
.font-medium { font-weight: var(--font-medium); }

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

/* Forms base */
input, textarea, select, button {
  font-family: inherit;
  font-size: inherit;
  color: inherit;
}

.spinner {
  width: 20px;
  height: 20px;
  border: 2px solid var(--border-primary);
  border-top-color: var(--color-primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  display: inline-block;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

.fade-in {
  animation: fadeIn var(--transition-base) forwards;
}

/* 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;
}