:root {
  --color-bg: oklch(16% 0.012 280);
  --color-bg-elev: oklch(21% 0.015 280);
  --color-surface: oklch(25% 0.02 282);
  --color-text: oklch(96% 0.005 280);
  --color-muted: oklch(70% 0.02 280);
  --color-accent: oklch(80% 0.13 85);
  --color-line: oklch(32% 0.02 282);

  --text-title: clamp(1.6rem, 1.2rem + 2vw, 2.1rem);

  --radius-card: 14px;
  --radius-pill: 999px;
  --gap-feed: 6px;

  --space-edge: clamp(0.8rem, 0.5rem + 2vw, 1.1rem);

  --duration-fast: 140ms;
  --duration-normal: 300ms;
  --ease-out-expo: cubic-bezier(0.16, 1, 0.3, 1);
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--color-bg);
  color: var(--color-text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", sans-serif;
  -webkit-font-smoothing: antialiased;
}

body {
  min-height: 100vh;
  padding:
    calc(env(safe-area-inset-top) + 0.8rem)
    var(--space-edge)
    calc(env(safe-area-inset-bottom) + 1.6rem);
  background:
    radial-gradient(110% 50% at 50% -8%, oklch(28% 0.05 80 / 0.5), transparent 70%),
    var(--color-bg);
}

/* ---------------------------------------------------------------- hero */
.hero {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 0.9rem;
}

.hero__title {
  margin: 0;
  font-size: var(--text-title);
  line-height: 1;
  font-weight: 700;
  letter-spacing: -0.02em;
}

/* «Без стиля» — текстовый контрол (не пример), поэтому подпись уместна. */
.reset {
  flex: none;
  padding: 0.42rem 0.95rem;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-pill);
  background: var(--color-bg-elev);
  color: var(--color-muted);
  font: inherit;
  font-size: 0.82rem;
  font-weight: 550;
  cursor: pointer;
  transition:
    color var(--duration-fast) var(--ease-out-expo),
    border-color var(--duration-fast) var(--ease-out-expo),
    background var(--duration-fast) var(--ease-out-expo);
  -webkit-tap-highlight-color: transparent;
}

.reset:active { transform: scale(0.96); }

.reset.is-selected {
  color: oklch(20% 0.02 280);
  background: var(--color-accent);
  border-color: var(--color-accent);
}

/* ---------------------------------------------------------------- feed */
.gallery {
  display: flex;
  flex-direction: column;
  gap: var(--gap-feed);
}

.card {
  position: relative;
  display: block;
  width: 100%;
  aspect-ratio: 2 / 1;
  padding: 0;
  border: none;
  border-radius: var(--radius-card);
  background: var(--color-surface) center / cover no-repeat;
  overflow: hidden;
  cursor: pointer;
  transform: translateZ(0);
  transition:
    transform var(--duration-normal) var(--ease-out-expo),
    box-shadow var(--duration-normal) var(--ease-out-expo);
  -webkit-tap-highlight-color: transparent;
}

.card:active { transform: scale(0.985); }

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

/* Выбранная карточка: акцентная рамка-обводка внутрь + мягкое свечение наружу. */
.card.is-selected {
  box-shadow:
    inset 0 0 0 3px var(--color-accent),
    0 10px 30px -14px oklch(80% 0.13 85 / 0.7);
}

/* Бейдж «выбрано» */
.card__check {
  position: absolute;
  top: 0.55rem;
  right: 0.55rem;
  width: 26px;
  height: 26px;
  display: grid;
  place-items: center;
  border-radius: var(--radius-pill);
  background: var(--color-accent);
  color: oklch(20% 0.02 280);
  font-size: 0.82rem;
  font-weight: 700;
  opacity: 0;
  transform: scale(0.6);
  transition:
    opacity var(--duration-fast) var(--ease-out-expo),
    transform var(--duration-fast) var(--ease-out-expo);
}

.card.is-selected .card__check {
  opacity: 1;
  transform: scale(1);
}

/* Заглушка, пока превью нет/не загрузилось — мягкий градиент вместо пустоты. */
.card--placeholder {
  background-image:
    linear-gradient(135deg, oklch(30% 0.06 300 / 0.9), oklch(26% 0.05 230 / 0.9));
}

/* ---------------------------------------------------------------- skeleton */
.skeleton-grid {
  display: flex;
  flex-direction: column;
  gap: var(--gap-feed);
}

.skeleton-grid span {
  aspect-ratio: 2 / 1;
  border-radius: var(--radius-card);
  background: linear-gradient(
    100deg,
    var(--color-surface) 30%,
    var(--color-bg-elev) 50%,
    var(--color-surface) 70%
  );
  background-size: 200% 100%;
  animation: shimmer 1.4s infinite linear;
}

@keyframes shimmer {
  from { background-position: 200% 0; }
  to { background-position: -200% 0; }
}

/* ---------------------------------------------------------------- toast */
.toast {
  position: fixed;
  left: 50%;
  bottom: calc(env(safe-area-inset-bottom) + 1.2rem);
  transform: translate(-50%, 1.5rem);
  padding: 0.7rem 1.2rem;
  border-radius: var(--radius-pill);
  background: oklch(24% 0.02 282 / 0.95);
  border: 1px solid var(--color-line);
  backdrop-filter: blur(12px);
  color: var(--color-text);
  font-size: 0.88rem;
  font-weight: 550;
  opacity: 0;
  pointer-events: none;
  transition:
    opacity var(--duration-normal) var(--ease-out-expo),
    transform var(--duration-normal) var(--ease-out-expo);
  z-index: 10;
}

.toast.is-visible {
  opacity: 1;
  transform: translate(-50%, 0);
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}