/* Shared typography, motion, spacing, focus, reveal, and state utilities. */

:root {
  /* Typography — 1.25 major third, fluid */
  --text-xs: clamp(0.625rem, 0.58rem + 0.2vw, 0.75rem);
  --text-sm: clamp(0.75rem, 0.7rem + 0.25vw, 0.875rem);
  --text-base: clamp(0.875rem, 0.8rem + 0.35vw, 1rem);
  --text-md: clamp(1rem, 0.9rem + 0.5vw, 1.25rem);
  --text-lg: clamp(1.125rem, 1rem + 0.7vw, 1.5rem);
  --text-xl: clamp(1.375rem, 1.15rem + 1vw, 2rem);
  --text-2xl: clamp(1.75rem, 1.4rem + 1.5vw, 2.75rem);
  --text-3xl: clamp(2.25rem, 1.7rem + 2.2vw, 3.75rem);

  --leading-xs: 1.2;
  --leading-sm: 1.35;
  --leading-base: 1.55;
  --leading-md: 1.4;
  --leading-lg: 1.3;
  --leading-xl: 1.2;
  --leading-2xl: 1.1;
  --leading-3xl: 1.05;

  --weight-normal: 400;
  --weight-medium: 500;
  --weight-semibold: 600;
  --weight-bold: 700;
  --weight-black: 800;

  /* Motion */
  --duration-instant: 80ms;
  --duration-fast: 150ms;
  --duration-normal: 250ms;
  --duration-slow: 400ms;

  --ease-brand: cubic-bezier(0.22, 1, 0.36, 1);
  --ease-out: cubic-bezier(0, 0, 0.2, 1);
  --ease-in: cubic-bezier(0.8, 0, 1, 1);
  --ease-in-out: cubic-bezier(0.4, 0, 0.2, 1);

  --transition-view-in: opacity var(--duration-slow) var(--ease-out),
    transform var(--duration-slow) var(--ease-brand);
  --transition-view-out: opacity var(--duration-fast) var(--ease-in),
    transform var(--duration-fast) var(--ease-in);

  /* Spacing — fluid */
  --space-xs: clamp(4px, 0.3vw, 8px);
  --space-sm: clamp(8px, 0.6vw, 12px);
  --space-md: clamp(12px, 1vw, 20px);
  --space-lg: clamp(18px, 1.5vw, 32px);
  --space-xl: clamp(24px, 2vw, 48px);
  --space-2xl: clamp(36px, 3vw, 64px);

  /* Focus */
  --focus-ring: 0 0 0 3px rgba(10, 132, 255, 0.32);
  --focus-ring-offset: 2px;

  /* Skeleton */
  --skeleton-base: rgba(0, 0, 0, 0.04);
  --skeleton-shimmer: rgba(0, 0, 0, 0.08);

  /* Parallax */
  --scroll-offset: 0px;

  /* Bridge legacy button tokens */
  --btn-ease: var(--ease-brand);
}

[data-theme='dark'] {
  --focus-ring: 0 0 0 3px rgba(74, 165, 255, 0.4);
  --skeleton-base: rgba(255, 255, 255, 0.04);
  --skeleton-shimmer: rgba(255, 255, 255, 0.09);
}

@media (prefers-reduced-motion: reduce) {
  :root {
    --duration-instant: 0ms;
    --duration-fast: 0ms;
    --duration-normal: 0ms;
    --duration-slow: 0ms;
    --scroll-offset: 0px;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  .reveal {
    opacity: 1 !important;
    transform: none !important;
  }
}

body {
  font-size: var(--text-base);
  line-height: var(--leading-base);
}

.app-shell {
  max-width: min(1280px, calc(100% - var(--space-xl)));
  padding: var(--space-lg);
}

.nav-link {
  font-size: var(--text-sm);
  line-height: var(--leading-sm);
  transition:
    transform var(--duration-fast) var(--ease-brand),
    background var(--duration-normal) var(--ease-out),
    color var(--duration-normal) var(--ease-out),
    box-shadow var(--duration-normal) var(--ease-out);
}

.brand-text span {
  font-size: var(--text-md);
  line-height: var(--leading-md);
  font-weight: var(--weight-bold);
}

.brand-text small {
  font-size: var(--text-xs);
  line-height: var(--leading-xs);
}

.result-card {
  padding: var(--space-sm) var(--space-md);
  transition:
    transform var(--duration-fast) var(--ease-brand),
    box-shadow var(--duration-fast) var(--ease-out),
    border-color var(--duration-fast) var(--ease-out);
}

.result-card:focus-visible {
  outline: none;
  box-shadow: var(--focus-ring);
  outline-offset: var(--focus-ring-offset);
}

.result-card:active {
  transform: translateY(-2px) scale(0.99);
}

*:focus-visible {
  outline: none;
  box-shadow: var(--focus-ring);
  outline-offset: var(--focus-ring-offset);
}

.primary:focus-visible,
.secondary:focus-visible,
.ghost:focus-visible,
.tab:focus-visible,
.nav-link:focus-visible {
  outline: none;
  box-shadow: var(--focus-ring);
}

.bg-orb {
  transform: translateY(calc(var(--scroll-offset) * 0.003));
  will-change: transform;
}

.bg-grid {
  transform: translateY(calc(var(--scroll-offset) * 0.0008));
  will-change: transform;
}

@media (prefers-reduced-motion: reduce) {
  .bg-orb,
  .bg-grid {
    transform: none;
    will-change: auto;
  }
}

.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition:
    opacity var(--duration-slow) var(--ease-out),
    transform var(--duration-slow) var(--ease-brand);
  transition-delay: calc(var(--reveal-index, 0) * 60ms);
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.skeleton-shimmer {
  background: linear-gradient(
    90deg,
    var(--skeleton-base) 0%,
    var(--skeleton-shimmer) 50%,
    var(--skeleton-base) 100%
  );
  background-size: 200% 100%;
  animation: skeleton-shimmer 1.6s ease-in-out infinite;
  border-radius: var(--radius-sm);
}

@keyframes skeleton-shimmer {
  0% {
    background-position: 200% 0;
  }
  100% {
    background-position: -200% 0;
  }
}

.empty-state {
  display: grid;
  justify-items: center;
  gap: var(--space-sm);
  padding: var(--space-xl) var(--space-md);
  text-align: center;
}

.empty-state-icon {
  font-size: var(--text-2xl);
  line-height: 1;
}

.empty-state-heading {
  font-size: var(--text-md);
  line-height: var(--leading-md);
  font-weight: var(--weight-semibold);
  color: var(--ink);
}

.empty-state-copy {
  font-size: var(--text-sm);
  line-height: var(--leading-sm);
  color: var(--muted);
  max-width: 28rem;
}

.error-banner {
  display: flex;
  align-items: flex-start;
  gap: var(--space-sm);
  padding: 14px 18px;
  border-radius: var(--radius-md);
  background: rgba(180, 35, 24, 0.06);
  border: 1px solid rgba(180, 35, 24, 0.18);
  color: var(--red);
  font-size: var(--text-sm);
  line-height: var(--leading-sm);
}

.error-banner button.retry {
  margin-left: auto;
  flex-shrink: 0;
}

.success-toast-region {
  position: fixed;
  right: max(var(--space-md), env(safe-area-inset-right));
  bottom: max(var(--space-md), env(safe-area-inset-bottom));
  z-index: 240;
  display: grid;
  justify-items: end;
  pointer-events: none;
}

.success-toast {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  max-width: min(360px, calc(100vw - (var(--space-md) * 2)));
  padding: 12px 16px;
  border-radius: var(--radius-md);
  color: #0f6b45;
  background: rgba(22, 163, 103, 0.12);
  border: 1px solid rgba(22, 163, 103, 0.24);
  box-shadow: var(--shadow-lg);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  pointer-events: auto;
}

.success-toast-icon {
  display: grid;
  place-items: center;
  width: 24px;
  height: 24px;
  border-radius: 999px;
  color: #fff;
  background: #16a367;
  font-size: var(--text-sm);
  font-weight: var(--weight-bold);
  flex-shrink: 0;
}

.success-toast-copy {
  font-size: var(--text-sm);
  line-height: var(--leading-sm);
  font-weight: var(--weight-semibold);
}

.success-toast.is-dismissing {
  opacity: 0;
  transform: translateY(8px);
}

[data-theme='dark'] .success-toast {
  color: #b9f6d4;
  background: rgba(30, 185, 118, 0.14);
  border-color: rgba(74, 222, 128, 0.28);
}

.results-grid {
  container-type: inline-size;
  container-name: results;
}

@container results (min-width: 600px) {
  .results-grid.view-list .result-card-header {
    grid-template-columns: auto 1fr auto;
  }
}

@container results (max-width: 599px) {
  .results-grid.view-list .result-card-header {
    grid-template-columns: 1fr;
  }

  .results-grid.view-list .result-card-price {
    justify-self: stretch;
  }
}

@supports (view-transition-name: none) {
  ::view-transition-old(root) {
    animation: var(--transition-view-out);
  }

  ::view-transition-new(root) {
    animation: var(--transition-view-in);
  }
}

@media (max-width: 400px) {
  .glass {
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
  }

  .bg-orb {
    filter: blur(32px);
  }
}