/* ========================================
   BASE.CSS - Global Resets & Base Styles
   ======================================== */

/* ===== CSS RESET ===== */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

/* ===== ROOT & BODY ===== */
html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-family-primary);
  font-size: var(--font-size-md);
  font-weight: var(--font-weight-normal);
  line-height: var(--line-height-normal);
  color: var(--color-text);
  background-color: var(--color-bg-dark);
  overflow-x: hidden;
}

/* Prevent scrolling when mobile menu is open */
body.menu-open {
  overflow: hidden;
  position: fixed;
  width: 100%;
}

/* ===== TYPOGRAPHY ===== */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-family-display);
  font-weight: var(--font-weight-bold);
  line-height: var(--line-height-tight);
  color: var(--color-text);
  margin-bottom: var(--spacing-md);
}

h1 {
  font-size: var(--font-size-3xl);
}

h2 {
  font-size: var(--font-size-2xl);
}

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

h4 {
  font-size: var(--font-size-lg);
}

h5, h6 {
  font-size: var(--font-size-md);
}

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

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

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

a:focus {
  outline: none;
  box-shadow: var(--shadow-focus);
  border-radius: var(--radius-sm);
}

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

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

/* ===== BUTTONS & INPUTS ===== */
button {
  font-family: inherit;
  font-size: inherit;
  cursor: pointer;
  border: none;
  background: none;
  color: inherit;
}

button:focus {
  outline: none;
}

input, textarea, select {
  font-family: inherit;
  font-size: inherit;
  color: inherit;
  border: var(--border-width) solid var(--color-border);
  background-color: var(--color-bg-input);
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--radius-md);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

input:focus, textarea:focus, select:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: var(--shadow-focus);
}

/* ===== UTILITY CLASSES ===== */
.container {
  max-width: var(--container-max-width);
  margin: 0 auto;
  padding: 0 var(--container-padding);
}

.section-separator {
  border: none;
  border-top: var(--border-width) solid var(--color-border);
  margin: var(--spacing-2xl) 0;
}

@media (max-width: 767px) {
  .section-separator {
    margin: var(--spacing-lg) 0;
  }
}

/* Visually hidden (for accessibility) */
.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;
}

/* Placeholder text styling */
.placeholder-text {
  color: var(--color-text-muted);
  font-style: italic;
}