body {
  font-family: var(--font-body);
  font-size: var(--font-size-base);
  color: var(--color-text);
  background-color: var(--color-bg);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  position: relative;
  overflow-x: hidden;
}

/* Subtle grain texture overlay */
.page-grain {
  position: fixed;
  inset: 0;
  opacity: 0.03;
  pointer-events: none;
  z-index: 1;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  background-repeat: repeat;
  background-size: 256px 256px;
}

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

/* Header */
header {
  background-color: var(--color-primary);
  padding: var(--spacing-xl) 0;
  position: relative;
}

header::after {
  content: '';
  position: absolute;
  bottom: -3px;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--color-secondary);
}

.header-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.header-brand {
  display: flex;
  align-items: center;
  gap: var(--spacing-lg);
}

.header-logo {
  width: 48px;
  height: 48px;
  background: var(--color-secondary);
  border-radius: var(--border-radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.logo-mark {
  font-family: var(--font-display);
  font-size: var(--font-size-lg);
  color: var(--color-text-inverse);
  letter-spacing: -0.02em;
}

.header-title {
  font-family: var(--font-display);
  font-size: var(--font-size-2xl);
  font-weight: 400;
  color: var(--color-text-inverse);
  letter-spacing: -0.02em;
  line-height: 1.1;
}

.header-subtitle {
  font-size: var(--font-size-sm);
  color: var(--color-primary-light);
  margin-top: var(--spacing-xs);
  font-weight: 300;
  letter-spacing: 0.02em;
  text-transform: uppercase;
}

/* Main content */
main {
  flex: 1;
  padding: var(--spacing-3xl) 0;
}

/* Form card */
.form-card {
  background: var(--color-surface);
  border-radius: var(--border-radius-lg);
  padding: var(--spacing-2xl) var(--spacing-2xl);
  box-shadow: var(--shadow-card);
  position: relative;
  animation: card-enter var(--transition-slow) both;
}

@keyframes card-enter {
  from {
    opacity: 0;
    transform: translateY(16px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Footer */
footer {
  background-color: var(--color-primary);
  padding: var(--spacing-lg) 0;
  text-align: center;
  font-size: var(--font-size-sm);
  color: var(--color-primary-light);
  position: relative;
}

footer::before {
  content: '';
  position: absolute;
  top: -3px;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--color-secondary);
}

@media (width <= 640px) {
  .form-card {
    padding: var(--spacing-xl) var(--spacing-lg);
    border-radius: var(--border-radius);
  }

  .header-title {
    font-size: var(--font-size-xl);
  }
}