:root {
  --bg: #f6f5f2;
  --surface: #ffffff;
  --surface-2: #efede8;
  --border: #dedbd3;
  --text: #1d1c1a;
  --muted: #6b6860;
  --accent: #2f5fd0;
  --accent-text: #ffffff;
  --danger: #b4321f;
  --danger-bg: #fbe9e5;
  --ok: #1f7a4a;
  --shadow: 0 1px 2px rgb(0 0 0 / 0.06), 0 4px 16px rgb(0 0 0 / 0.04);
  --radius: 12px;
  color-scheme: light dark;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #141413;
    --surface: #1e1d1b;
    --surface-2: #2a2926;
    --border: #3a3834;
    --text: #ecebe7;
    --muted: #a19d94;
    --accent: #7a9ff5;
    --accent-text: #0e1320;
    --danger: #f08a78;
    --danger-bg: #3a1f1a;
    --ok: #6fd39c;
    --shadow: 0 1px 2px rgb(0 0 0 / 0.4);
  }
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 15px/1.45 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  padding: 0 max(16px, env(safe-area-inset-right)) calc(32px + env(safe-area-inset-bottom)) max(16px, env(safe-area-inset-left));
}
.muted { color: var(--muted); }
code, kbd { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: 0.88em; }
kbd {
  display: inline-block;
  min-width: 1.6em;
  padding: 0 0.35em;
  border: 1px solid var(--border);
  border-bottom-width: 2px;
  border-radius: 5px;
  background: var(--surface);
  text-align: center;
  margin-right: 2px;
}
[hidden] { display: none !important; }

button, .button {
  font: inherit;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  min-height: 38px;
  padding: 6px 14px;
  border-radius: 9px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
  cursor: pointer;
  text-decoration: none;
  white-space: nowrap;
  -webkit-tap-highlight-color: transparent;
}
button:hover, .button:hover { background: var(--surface-2); }
button:disabled { opacity: 0.35; cursor: default; }
button:focus-visible, .button:focus-visible, input:focus-visible, .thumb:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}
.primary { background: var(--accent); color: var(--accent-text); border-color: transparent; font-weight: 600; }
.primary:hover { background: var(--accent); filter: brightness(1.08); }
.ghost { background: transparent; border-color: transparent; color: var(--muted); }
.danger { color: var(--danger); }
.danger.armed, .armed { background: var(--danger); color: #fff; border-color: transparent; }

/* ---------- header ---------- */
.top {
  position: sticky;
  top: 0;
  z-index: 5;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 8px 16px;
  margin: 0 -16px;
  padding: calc(10px + env(safe-area-inset-top)) 16px 10px;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}
.title { display: flex; align-items: baseline; gap: 10px; }
.title h1 { font-size: 19px; margin: 0; letter-spacing: -0.01em; }
.top-actions { display: flex; align-items: center; gap: 8px; }
.top-actions form { margin: 0; }

.drop-hint {
  margin: 16px 0;
  padding: 14px 16px;
  border: 1.5px dashed var(--border);
  border-radius: var(--radius);
  background: var(--surface);
}
.drop-hint p { margin: 0 0 6px; }
.drop-hint .dir { font-size: 13px; overflow-wrap: anywhere; }
.toggle { display: inline-flex; align-items: center; gap: 8px; font-size: 13px; color: var(--muted); cursor: pointer; }
.toggle input { width: 16px; height: 16px; accent-color: var(--accent); }

.selection-bar {
  position: sticky;
  top: 64px;
  z-index: 4;
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0 0 12px;
  padding: 8px 10px 8px 14px;
  border-radius: var(--radius);
  background: var(--surface);
  border: 1px solid var(--accent);
  box-shadow: var(--shadow);
}
.selection-bar span { font-weight: 600; margin-right: auto; }

.status {
  position: fixed;
  left: 50%;
  bottom: calc(20px + env(safe-area-inset-bottom));
  transform: translate(-50%, 20px);
  z-index: 20;
  max-width: min(92vw, 640px);
  margin: 0;
  padding: 10px 16px;
  border-radius: 10px;
  background: var(--text);
  color: var(--bg);
  font-size: 14px;
  overflow-wrap: anywhere;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.18s, transform 0.18s;
}
.status.show { opacity: 1; transform: translate(-50%, 0); }
.status.error { background: var(--danger); color: #fff; }

/* ---------- grid ---------- */
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 14px;
}
.card {
  position: relative;
  display: flex;
  flex-direction: column;
  min-width: 0;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: var(--shadow);
  overflow: hidden;
}
.card.selected { border-color: var(--accent); box-shadow: 0 0 0 2px var(--accent); }
.card.fresh { animation: fresh 1.6s ease-out; }
@keyframes fresh { from { box-shadow: 0 0 0 3px var(--ok); } }
.thumb {
  display: block;
  width: 100%;
  min-height: 0;
  padding: 0;
  border: 0;
  border-radius: 0;
  aspect-ratio: 4 / 3;
  background: var(--surface-2);
  cursor: zoom-in;
}
.thumb:hover { background: var(--surface-2); }
.thumb img { width: 100%; height: 100%; object-fit: contain; display: block; }
.pick {
  position: absolute;
  top: 8px;
  left: 8px;
  z-index: 1;
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  border-radius: 8px;
  background: color-mix(in srgb, var(--surface) 85%, transparent);
  cursor: pointer;
}
.pick input { width: 18px; height: 18px; margin: 0; accent-color: var(--accent); cursor: pointer; }
.meta { display: flex; flex-direction: column; gap: 1px; padding: 10px 12px 4px; min-width: 0; }
.name {
  display: flex;
  align-items: center;
  font: 500 13.5px/1.35 ui-monospace, SFMono-Regular, Menlo, monospace;
  overflow-wrap: anywhere;
}
.name .rename {
  flex: 1;
  min-width: 0;
  font: inherit;
  padding: 3px 6px;
  border: 1px solid var(--accent);
  border-radius: 6px;
  background: var(--bg);
  color: var(--text);
}
.name .ext { color: var(--muted); padding-left: 2px; }
.sub { font-size: 12.5px; }
.actions { display: flex; gap: 6px; padding: 8px 10px 10px; margin-top: auto; flex-wrap: wrap; }
.actions button { flex: 1 1 auto; min-height: 34px; padding: 4px 10px; font-size: 13.5px; }

.empty { text-align: center; color: var(--muted); padding: 48px 0; }

.drag-overlay {
  position: fixed;
  inset: 0;
  z-index: 30;
  display: grid;
  place-items: center;
  background: color-mix(in srgb, var(--accent) 22%, transparent);
  pointer-events: none;
}
.drag-overlay div {
  padding: 24px 32px;
  border: 2px dashed var(--accent);
  border-radius: 16px;
  background: var(--surface);
  font-size: 18px;
  font-weight: 600;
}

/* ---------- viewer ---------- */
.viewer {
  width: 100vw;
  height: 100dvh;
  max-width: none;
  max-height: none;
  margin: 0;
  padding: 0;
  border: 0;
  background: rgb(10 10 10 / 0.94);
  color: #eee;
}
.viewer::backdrop { background: rgb(0 0 0 / 0.6); }
.viewer[open] { display: flex; flex-direction: column; }
.viewer-bar {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: calc(10px + env(safe-area-inset-top)) 12px 10px;
}
.viewer-bar button, .viewer-bar .button { background: rgb(255 255 255 / 0.1); color: #eee; border-color: transparent; }
.viewer-name { margin-right: auto; font: 13px ui-monospace, Menlo, monospace; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; min-width: 0; }
.viewer-stage { position: relative; flex: 1; min-height: 0; display: grid; place-items: center; padding: 0 8px calc(8px + env(safe-area-inset-bottom)); }
.viewer-stage img { max-width: 100%; max-height: 100%; object-fit: contain; }
.nav {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 44px;
  height: 64px;
  font-size: 32px;
  line-height: 1;
  background: rgb(255 255 255 / 0.1);
  color: #fff;
  border: 0;
}
.nav:hover { background: rgb(255 255 255 / 0.2); }
.nav.prev { left: 8px; }
.nav.next { right: 8px; }

/* ---------- login ---------- */
.login-page { display: grid; place-items: center; min-height: 100dvh; }
.login {
  width: min(360px, 100%);
  padding: 28px 24px;
  border: 1px solid var(--border);
  border-radius: 16px;
  background: var(--surface);
  box-shadow: var(--shadow);
  text-align: center;
}
.login h1 { margin: 10px 0 18px; font-size: 22px; }
.login form { display: grid; gap: 14px; text-align: left; }
.login label { display: grid; gap: 5px; font-size: 14px; font-weight: 500; }
.login input {
  font: inherit;
  font-size: 16px; /* stops iOS zooming in */
  padding: 10px 12px;
  border-radius: 9px;
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--text);
}
.login .primary { min-height: 44px; margin-top: 4px; }
.error { color: var(--danger); background: var(--danger-bg); padding: 8px 12px; border-radius: 8px; font-size: 14px; }

/* ---------- phones ---------- */
@media (max-width: 600px) {
  body { font-size: 15px; }
  .grid { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 10px; }
  .title h1 { font-size: 17px; }
  .top-actions { width: 100%; }
  .top-actions > * { flex: 1; }
  .top-actions form button { width: 100%; }
  .drop-hint p:first-child { display: none; } /* no ⌘V on a phone */
  .meta { padding: 8px 10px 2px; }
  .name { font-size: 12px; }
  .actions { padding: 6px 8px 8px; gap: 4px; }
  .actions button { min-height: 36px; font-size: 12.5px; padding: 4px 6px; }
  .selection-bar { top: 108px; }
  .nav { display: none; }
}
@media (max-width: 360px) {
  .grid { grid-template-columns: 1fr; }
}