/* ============================================
   FussionShade Partner Program — Base Styles
   Reset, Typography, Accessibility, Utilities
   ============================================ */

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

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

/* Focus */
:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

.skip-to-content {
  position: absolute;
  top: -100%;
  left: var(--space-4);
  z-index: var(--z-toast, 800);
  padding: var(--space-3) var(--space-6);
  background: var(--color-primary);
  color: white;
  font-weight: var(--weight-semibold);
  border-radius: var(--radius-md);
  text-decoration: none;
  transition: top var(--transition-fast);
}

.skip-to-content:focus {
  top: var(--space-4);
}

/* ---- Typography ---- */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: var(--weight-bold);
  line-height: var(--leading-tight);
  color: var(--color-text);
  letter-spacing: var(--tracking-tight);
}

h1 {
  font-size: clamp(2rem, 5vw, 3.25rem);
  font-weight: 800;
  line-height: 1.1;
}

h2 {
  font-size: clamp(1.5rem, 4vw, 2.25rem);
  font-weight: 700;
}

h3 {
  font-size: clamp(1.125rem, 2.5vw, 1.375rem);
  font-weight: 600;
}

h4 {
  font-size: var(--text-lg);
  font-weight: 600;
}

p {
  margin-bottom: var(--space-4);
  color: var(--color-text-secondary);
  line-height: var(--leading-normal);
  max-width: 65ch;
}

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

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

strong {
  font-weight: var(--weight-semibold);
  color: var(--color-text);
}

small {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

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

ul, ol {
  list-style: none;
}

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

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

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

/* ---- Section ---- */
.section {
  padding: var(--section-padding) 0;
}

.section-sm {
  padding: var(--space-16) 0;
}

.section-alt {
  background-color: var(--color-bg-alt);
}

/* ---- Section Headers ---- */
.section-header {
  max-width: 600px;
  margin-bottom: var(--space-12);
}

.section-header h2 {
  margin-bottom: var(--space-3);
}

.section-header p {
  margin: 0;
  font-size: var(--text-lg);
}

/* ---- Grid Layouts ---- */
.grid {
  display: grid;
  gap: var(--space-8);
}

.grid-2 {
  grid-template-columns: repeat(2, 1fr);
}

.grid-3 {
  grid-template-columns: repeat(3, 1fr);
}

.grid-asymmetric {
  grid-template-columns: 2fr 1fr;
}

.grid-asymmetric-reverse {
  grid-template-columns: 1fr 2fr;
}

/* ---- Utilities ---- */
.text-center { text-align: center; }
.text-primary { color: var(--color-primary); }
.text-muted { color: var(--color-text-muted); }
.font-semibold { font-weight: var(--weight-semibold); }
.font-bold { font-weight: var(--weight-bold); }

.mt-0 { margin-top: 0; }
.mt-4 { margin-top: var(--space-4); }
.mt-8 { margin-top: var(--space-8); }
.mb-0 { margin-bottom: 0; }
.mb-4 { margin-bottom: var(--space-4); }
.mb-8 { margin-bottom: var(--space-8); }

.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;
}

/* ---- Responsive ---- */
@media (max-width: 768px) {
  html {
    font-size: 15px;
  }

  .section {
    padding: var(--space-12) 0;
  }

  .section-header {
    margin-bottom: var(--space-8);
  }

  .grid-2,
  .grid-3,
  .grid-asymmetric,
  .grid-asymmetric-reverse {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 480px) {
  html {
    font-size: 14px;
  }
}

/* ---- Print ---- */
@media print {
  body {
    background: white;
    color: black;
  }

  .no-print {
    display: none !important;
  }
}