:root {
  --bg: #0a0a0b;
  --bg-elevated: #121214;
  --bg-subtle: #1a1a1e;
  --fg: #f4f4f5;
  --fg-muted: #a1a1aa;
  --fg-subtle: #71717a;
  --border: color-mix(in oklab, var(--fg) 12%, transparent);
  --border-strong: color-mix(in oklab, var(--fg) 22%, transparent);
  --accent: #c8ccd4;
  --accent-fg: #0a0a0b;
  --danger: #c45c5c;

  --radius-xs: 4px;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;

  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 24px;
  --space-6: 32px;
  --space-7: 48px;

  --font-display: "Fraunces", "Times New Roman", serif;
  --font-body: "Outfit", system-ui, sans-serif;

  --text-xs: 0.75rem;
  --text-sm: 0.875rem;
  --text-base: 1rem;
  --text-xl: clamp(1.5rem, 1.2rem + 1vw, 2rem);
  --text-2xl: clamp(2rem, 1.4rem + 2vw, 2.75rem);

  --leading-tight: 1.1;
  --leading-normal: 1.5;

  --motion-quick: 150ms;
  --motion-fast: 250ms;
  --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
  --shadow: 0 16px 40px color-mix(in oklab, #000 45%, transparent);
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: var(--leading-normal);
  -webkit-font-smoothing: antialiased;
}

body {
  padding: env(safe-area-inset-top) env(safe-area-inset-right) env(safe-area-inset-bottom)
    env(safe-area-inset-left);
}

button:not(:disabled),
[role="button"]:not(:disabled) {
  cursor: pointer;
}

button,
input,
select {
  font: inherit;
  color: inherit;
}

#app {
  min-height: 100dvh;
}

.login-shell {
  min-height: 100dvh;
  display: grid;
  place-items: center;
  padding: var(--space-5);
}

.login-card {
  width: min(420px, 100%);
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: var(--space-6);
  box-shadow: var(--shadow);
}

.login-mark {
  width: 36px;
  height: 36px;
  margin-bottom: var(--space-4);
}

.login-card h1 {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: var(--text-2xl);
  letter-spacing: -0.03em;
  line-height: var(--leading-tight);
  margin: 0 0 var(--space-2);
}

.login-card p {
  margin: 0 0 var(--space-5);
  color: var(--fg-muted);
  font-size: var(--text-sm);
}

.field {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  margin-bottom: var(--space-4);
}

.field label {
  font-size: var(--text-xs);
  font-weight: 500;
  color: var(--fg-muted);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.field input {
  height: 44px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-strong);
  background: var(--bg);
  padding: 0 var(--space-4);
  outline: none;
}

.field input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 2px color-mix(in oklab, var(--accent) 35%, transparent);
}

.btn {
  height: 44px;
  border: 0;
  border-radius: var(--radius-sm);
  padding: 0 var(--space-4);
  font-weight: 500;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  transition: transform var(--motion-quick) var(--ease-out), opacity var(--motion-quick) var(--ease-out);
}

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

.btn-primary {
  width: 100%;
  background: var(--accent);
  color: var(--accent-fg);
}

.btn-ghost {
  background: transparent;
  color: var(--fg-muted);
  border: 1px solid var(--border);
  flex-shrink: 0;
}

.err {
  color: var(--danger);
  font-size: var(--text-sm);
  margin: 0 0 var(--space-3);
  min-height: 1.2em;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  background: color-mix(in oklab, var(--bg) 88%, transparent);
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(10px);
}

.topbar-actions {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  margin-left: auto;
  flex-shrink: 0;
}

.page-size {
  position: relative;
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.page-size-label {
  font-size: var(--text-xs);
  font-weight: 500;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--fg-muted);
  white-space: nowrap;
}

.page-size select {
  height: 44px;
  min-width: 5.25rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: var(--bg-elevated);
  color: var(--fg);
  padding: 0 var(--space-3);
  outline: none;
}

.page-size select:focus-visible {
  border-color: var(--accent);
  box-shadow: 0 0 0 2px color-mix(in oklab, var(--accent) 35%, transparent);
}

.brand {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  color: inherit;
  text-decoration: none;
  flex-shrink: 0;
}

.brand svg {
  width: 22px;
  height: 22px;
  display: block;
  margin: 0;
}

.brand span {
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 500;
}

.crumbs {
  display: flex;
  flex: 1;
  min-width: 0;
  overflow-x: auto;
  gap: var(--space-1);
  scrollbar-width: none;
}

.crumbs::-webkit-scrollbar {
  display: none;
}

.crumb {
  background: none;
  border: 0;
  color: var(--fg-muted);
  padding: 8px 6px;
  white-space: nowrap;
  font-size: var(--text-sm);
}

.crumb:last-child {
  color: var(--fg);
}

.sep {
  color: var(--fg-subtle);
  padding: 8px 0;
  font-size: var(--text-sm);
}

.main {
  padding: var(--space-4);
  max-width: 1400px;
  margin: 0 auto;
}

.pager-slot-top {
  margin: 0 0 var(--space-4);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-3);
}

.folder-tools {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-2);
  width: 100%;
}

.folder-filter {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: var(--space-2);
  min-height: 44px;
  color: var(--fg-muted);
  font-size: var(--text-sm);
}

.folder-sort {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.folder-sort-label {
  font-size: var(--text-xs);
  font-weight: 500;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--fg-muted);
  white-space: nowrap;
}

.folder-sort select {
  height: 44px;
  min-width: 10rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: var(--bg-elevated);
  color: var(--fg);
  padding: 0 var(--space-3);
  outline: none;
}

.folder-sort select:focus-visible {
  border-color: var(--accent);
  box-shadow: 0 0 0 2px color-mix(in oklab, var(--accent) 35%, transparent);
}

.folder-filter-text {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  cursor: pointer;
}

.folder-filter input[type="checkbox"] {
  width: 18px;
  height: 18px;
  margin: 0;
  accent-color: var(--accent);
  flex-shrink: 0;
}

.filter-input {
  height: 36px;
  width: 3.5ch;
  min-width: 2.5ch;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-xs);
  background: var(--bg);
  text-align: center;
  font-variant-numeric: tabular-nums;
  padding: 0 var(--space-1);
  outline: none;
}

.filter-input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 2px color-mix(in oklab, var(--accent) 35%, transparent);
}

#pager-top,
#pager-bottom {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-2);
  width: 100%;
}

.updir {
  min-width: 8rem;
}

.pager-slot-bottom {
  margin: var(--space-6) 0 0;
}

.pager {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: var(--space-1);
}

.pager-btn {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: var(--bg-elevated);
  color: var(--fg);
  font-variant-numeric: tabular-nums;
  padding: 0;
}

.pager-btn:hover:not(:disabled) {
  border-color: var(--border-strong);
  background: var(--bg-subtle);
}

.pager-btn:disabled {
  opacity: 0.35;
}

.pager-btn:focus-visible {
  border-color: var(--accent);
  box-shadow: 0 0 0 2px color-mix(in oklab, var(--accent) 35%, transparent);
  outline: none;
}

.pager-status {
  display: inline-flex;
  align-items: center;
  height: 44px;
  gap: 2px;
  padding: 0 var(--space-2);
  color: var(--fg-muted);
  font-variant-numeric: tabular-nums;
  font-size: var(--text-sm);
}

.pager-bracket {
  color: var(--fg-subtle);
}

.pager-input {
  height: 36px;
  width: 3.5ch;
  min-width: 2.5ch;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-xs);
  background: var(--bg);
  text-align: center;
  font-variant-numeric: tabular-nums;
  padding: 0 var(--space-1);
  outline: none;
}

.pager-input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 2px color-mix(in oklab, var(--accent) 35%, transparent);
}

.pager-of {
  margin-left: 2px;
  white-space: nowrap;
}

.section-label {
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--fg-subtle);
  font-weight: 500;
  margin: var(--space-3) 0 var(--space-3);
}

.spotlight-section {
  margin: 0 0 var(--space-6);
  padding: var(--space-4);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-lg);
  background: var(--bg-subtle);
}

.spotlight-section .section-label {
  margin-top: 0;
  color: var(--fg);
  letter-spacing: 0.14em;
}

.spotlight-section .folder {
  background: var(--bg-elevated);
  box-shadow: 0 0 0 1px var(--border-strong);
}

.folders,
.files {
  display: grid;
  gap: var(--space-3);
}

.folders {
  grid-template-columns: repeat(auto-fill, minmax(158px, 1fr));
}

.files {
  grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
}

.folder,
.tile {
  position: relative;
  display: block;
  width: 100%;
  border: 1px solid var(--border);
  background: var(--bg-elevated);
  color: inherit;
  overflow: hidden;
  text-align: left;
  padding: 0;
}

.folder {
  border-radius: var(--radius-lg);
}

.folder-cover {
  aspect-ratio: 3 / 4;
  width: 100%;
  object-fit: cover;
  display: block;
  background: var(--bg-subtle);
}

.folder-empty {
  aspect-ratio: 3 / 4;
  display: grid;
  place-items: center;
  color: var(--fg-subtle);
  background: var(--bg-subtle);
}

.folder-meta {
  padding: var(--space-3);
  min-height: calc(2em * 1.35 + var(--space-3) * 2);
}

.series-kicker {
  display: block;
  font-size: var(--text-xs);
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--fg-subtle);
  margin-bottom: var(--space-1);
}

.folder-meta strong {
  display: -webkit-box;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 2;
  line-clamp: 2;
  overflow: hidden;
  font-weight: 500;
  font-size: var(--text-sm);
  line-height: 1.35;
  white-space: normal;
  overflow-wrap: anywhere;
  word-break: break-word;
}

.tile {
  border-radius: var(--radius-md);
}

.tile img {
  aspect-ratio: 3 / 4;
  width: 100%;
  object-fit: cover;
  display: block;
  background: var(--bg-subtle);
}

.tile-name {
  display: block;
  padding: var(--space-2) var(--space-3) var(--space-3);
  font-size: var(--text-xs);
  color: var(--fg-muted);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.tile.plain {
  aspect-ratio: 3 / 4;
  display: grid;
  place-items: center;
  padding: var(--space-3);
  font-size: var(--text-xs);
  color: var(--fg-muted);
  word-break: break-all;
}

.empty {
  color: var(--fg-muted);
  padding: var(--space-7) var(--space-4);
  text-align: center;
}

.lightbox {
  position: fixed;
  inset: 0;
  z-index: 40;
  background: color-mix(in oklab, #000 82%, transparent);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-4);
}

.lightbox img {
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
  border-radius: var(--radius-sm);
}

.lb-nav,
.lb-close {
  position: absolute;
  border: 0;
  background: var(--bg-elevated);
  color: var(--fg);
  width: 44px;
  height: 44px;
  border-radius: 999px;
  border: 1px solid var(--border);
}

.lb-close {
  top: calc(env(safe-area-inset-top) + 12px);
  right: 12px;
}

.lb-prev {
  left: 12px;
}

.lb-next {
  right: 12px;
}

.lb-caption {
  position: absolute;
  left: 0;
  right: 0;
  bottom: calc(env(safe-area-inset-bottom) + 12px);
  text-align: center;
  color: var(--fg-muted);
  font-size: var(--text-sm);
  pointer-events: none;
}

.busy {
  opacity: 0.55;
  pointer-events: none;
}

@media (prefers-reduced-motion: reduce) {
  * {
    transition: none !important;
  }
}

@media (max-width: 560px) {
  .page-size-label {
    position: absolute;
    width: 1px;
    height: 1px;
    overflow: hidden;
    clip: rect(0 0 0 0);
  }
}

@media (min-width: 720px) {
  .folders {
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  }
  .files {
    grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  }
  .main {
    padding: var(--space-6);
  }
}