/* ========================================
   Base
   ======================================== */

body {
  background-color: var(--color-bg);
  color: var(--color-text-primary);
  font-family: var(--font-family);
  font-size: var(--font-size-body);
  line-height: var(--line-height-body);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

::selection {
  background-color: var(--color-accent);
  color: #fff;
}

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

h1, h2, h3, h4 {
  font-family: var(--font-family-heading);
  color: var(--color-text-primary);
}

h1 {
  font-size: var(--font-size-h1);
  font-weight: 800;
  line-height: var(--line-height-tight);
  letter-spacing: var(--letter-spacing-tight);
}

h2 {
  font-size: var(--font-size-h2);
  font-weight: 700;
  line-height: var(--line-height-tight);
  letter-spacing: var(--letter-spacing-tight);
}

h3 {
  font-size: var(--font-size-h3);
  font-weight: 600;
  line-height: var(--line-height-snug);
}

h4 {
  font-size: var(--font-size-body-lg);
  font-weight: 600;
  line-height: var(--line-height-snug);
}

p {
  color: var(--color-text-secondary);
  max-width: 680px;
}

.text-large {
  font-size: var(--font-size-body-lg);
  line-height: var(--line-height-body);
}

.text-small {
  font-size: var(--font-size-small);
}

.text-caption {
  font-size: var(--font-size-caption);
  color: var(--color-text-tertiary);
}

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

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

a {
  color: var(--color-accent);
  transition: color var(--transition-fast);
}

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

.link-cta {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: var(--font-size-body-lg);
  font-weight: 500;
  position: relative;
}

.link-cta::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 1px;
  background-color: currentColor;
  transition: width var(--transition-medium);
}

.link-cta:hover::after {
  width: 100%;
}

.link-cta .arrow {
  transition: transform var(--transition-fast);
}

.link-cta:hover .arrow {
  transform: translateX(4px);
}

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

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 32px;
  border-radius: var(--radius-pill);
  font-size: var(--font-size-body);
  font-weight: 600;
  line-height: 1;
  transition:
    background-color var(--transition-fast),
    transform var(--transition-fast),
    box-shadow var(--transition-fast);
}

.btn:hover {
  transform: scale(1.02);
}

.btn:active {
  transform: scale(0.98);
}

.btn-primary {
  background-color: var(--color-accent);
  color: #fff;
}

.btn-primary:hover {
  background-color: var(--color-accent-hover);
  color: #fff;
  box-shadow: 0 4px 20px rgba(232, 135, 58, 0.25);
}

.btn-secondary {
  background-color: transparent;
  color: var(--color-text-primary);
  border: 1px solid var(--color-border);
}

.btn-secondary:hover {
  background-color: var(--color-surface);
  color: var(--color-text-primary);
  border-color: rgba(0, 0, 0, 0.15);
}

/* ========================================
   Layout
   ======================================== */

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

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

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

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

.skip-link {
  position: absolute;
  top: -100%;
  left: 16px;
  padding: 12px 24px;
  background-color: var(--color-accent);
  color: #fff;
  font-weight: 600;
  border-radius: var(--radius-sm);
  z-index: 9999;
  transition: top var(--transition-fast);
}

.skip-link:focus {
  top: 16px;
  color: #fff;
}

:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 3px;
}

.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;
}