:root {
  color-scheme: light dark;
  --bg: #f5f6f8;
  --card: #ffffff;
  --fg: #14171f;
  --muted: #5d6472;
  --line: #e3e6ec;
  --accent: #2f6df6;
  --accent-soft: rgba(47, 109, 246, .09);
  --good: #12855c;
  --warn: #9a6200;
  --danger: #c23934;
  --shadow: 0 1px 2px rgba(16, 20, 30, .05), 0 8px 24px rgba(16, 20, 30, .05);
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f1116;
    --card: #171a21;
    --fg: #e8eaef;
    --muted: #98a0b0;
    --line: #272c36;
    --accent: #5b8cff;
    --accent-soft: rgba(91, 140, 255, .13);
    --good: #45c795;
    --warn: #e0a338;
    --danger: #ef6f68;
    --shadow: 0 1px 2px rgba(0, 0, 0, .3), 0 8px 24px rgba(0, 0, 0, .25);
  }
}

* { box-sizing: border-box; }

/* The `hidden` attribute must win over component display rules below (e.g.
   .lock/.banner set display:grid/flex). Without this, hidden elements such as
   the unlock overlay stay painted on top even after they are dismissed. */
[hidden] { display: none !important; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font: 15px/1.55 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  -webkit-font-smoothing: antialiased;
}

main {
  max-width: 640px;
  margin: 0 auto;
  padding: 40px 20px 64px;
}

header { margin-bottom: 22px; }
.header-row { display: flex; align-items: flex-start; justify-content: space-between; gap: 12px; flex-wrap: wrap; }
h1 { font-size: 22px; margin: 0; letter-spacing: -.01em; }
.sub { color: var(--muted); margin: 4px 0 0; font-size: 14px; }

.account { display: flex; align-items: center; gap: 10px; padding-top: 4px; }
.account-email {
  font-size: 12.5px; color: var(--muted); max-width: 200px; overflow: hidden;
  text-overflow: ellipsis; white-space: nowrap;
}
.link-btn {
  background: none; border: 0; color: var(--accent); font: inherit; font-size: 12.5px;
  font-weight: 600; cursor: pointer; padding: 4px 2px;
}
.link-btn:hover { text-decoration: underline; }

/* ---- public-URL banner ---- */
.banner {
  background: var(--accent-soft);
  border-bottom: 1px solid var(--line);
  padding: 12px 20px;
  display: flex;
  flex-wrap: wrap;
  gap: 10px 16px;
  align-items: center;
  justify-content: center;
  font-size: 13.5px;
}
.banner-form { display: flex; gap: 6px; }
.banner input {
  width: 300px;
  max-width: 55vw;
  padding: 7px 10px;
  border: 1px solid var(--line);
  border-radius: 7px;
  background: var(--card);
  color: var(--fg);
  font: inherit;
  font-size: 13px;
}
.banner button {
  padding: 7px 14px;
  border: 0;
  border-radius: 7px;
  background: var(--accent);
  color: #fff;
  font: inherit;
  font-weight: 600;
  font-size: 13px;
  cursor: pointer;
}

/* ---- drop zone ---- */
.drop {
  border: 1.5px dashed var(--line);
  border-radius: 14px;
  background: var(--card);
  padding: 40px 20px;
  text-align: center;
  cursor: pointer;
  transition: border-color .15s, background .15s, transform .1s;
  color: var(--muted);
}
.drop:hover, .drop:focus-visible { border-color: var(--accent); outline: none; }
.drop.over {
  border-color: var(--accent);
  background: var(--accent-soft);
  transform: scale(1.006);
}
.drop-icon { color: var(--accent); }
.drop-title { margin: 10px 0 2px; font-size: 16px; font-weight: 600; color: var(--fg); }
.drop-hint { margin: 0; font-size: 13px; }

/* ---- options ---- */
.options { display: flex; gap: 12px; margin: 16px 0 8px; flex-wrap: wrap; }
.field { flex: 1 1 180px; display: flex; flex-direction: column; gap: 5px; }
.field span { font-size: 12.5px; color: var(--muted); font-weight: 500; }
.field select {
  padding: 9px 10px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--card);
  color: var(--fg);
  font: inherit;
  font-size: 14px;
  cursor: pointer;
}

/* ---- in-flight uploads ---- */
.uploads { list-style: none; padding: 0; margin: 16px 0 0; display: grid; gap: 8px; }
.uploads li {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 12px 14px;
  box-shadow: var(--shadow);
}
.up-row { display: flex; justify-content: space-between; gap: 12px; font-size: 13.5px; }
.up-name { font-weight: 600; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.up-pct { color: var(--muted); font-variant-numeric: tabular-nums; flex: none; }
.bar { height: 4px; background: var(--line); border-radius: 999px; margin-top: 9px; overflow: hidden; }
.bar > i { display: block; height: 100%; width: 0; background: var(--accent); transition: width .15s; }
.up-error { color: var(--danger); font-size: 13px; margin-top: 6px; }

/* ---- active links ---- */
.list-section { margin-top: 32px; }
.list-head { display: flex; align-items: baseline; justify-content: space-between; margin-bottom: 10px; }
h2 { font-size: 14px; margin: 0; text-transform: uppercase; letter-spacing: .05em; color: var(--muted); }
.count { font-size: 12.5px; color: var(--muted); font-variant-numeric: tabular-nums; }

.files { list-style: none; padding: 0; margin: 0; display: grid; gap: 8px; }
.files li {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 12px 14px;
  box-shadow: var(--shadow);
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 4px 10px;
  align-items: center;
}
.f-name {
  font-weight: 600;
  font-size: 14px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.f-meta { font-size: 12.5px; color: var(--muted); grid-column: 1; }
.f-meta .soon { color: var(--warn); font-weight: 600; }
.f-actions { grid-row: 1 / span 2; grid-column: 2; display: flex; gap: 6px; }
.f-actions button {
  border: 1px solid var(--line);
  background: transparent;
  color: var(--fg);
  border-radius: 7px;
  padding: 6px 11px;
  font: inherit;
  font-size: 13px;
  cursor: pointer;
  transition: background .12s, border-color .12s, color .12s;
}
.f-actions button:hover { border-color: var(--accent); color: var(--accent); }
.f-actions .copy.done { background: var(--good); border-color: var(--good); color: #fff; }
.f-actions .revoke:hover { border-color: var(--danger); color: var(--danger); }

.empty { color: var(--muted); font-size: 13.5px; text-align: center; padding: 22px 0; margin: 0; }

/* ---- toast ---- */
.toast {
  position: fixed;
  left: 50%;
  bottom: 28px;
  transform: translate(-50%, 16px);
  background: var(--fg);
  color: var(--bg);
  padding: 10px 18px;
  border-radius: 999px;
  font-size: 13.5px;
  font-weight: 500;
  opacity: 0;
  pointer-events: none;
  transition: opacity .18s, transform .18s;
  max-width: 90vw;
  text-align: center;
}
.toast.show { opacity: 1; transform: translate(-50%, 0); }
.toast.error { background: var(--danger); color: #fff; }

/* ---- token lock ---- */
.lock {
  position: fixed;
  inset: 0;
  background: var(--bg);
  display: grid;
  place-items: center;
  padding: 24px;
  z-index: 10;
}
.lock-card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 28px;
  max-width: 380px;
  width: 100%;
  box-shadow: var(--shadow);
  /* On a short viewport (small window, mobile keyboard eating vertical space)
     this card's content can exceed the screen; without its own scroll the
     buttons at the bottom become unreachable since .lock is a fixed overlay
     with nothing else to scroll (measured: caught exactly this way in a
     400px-tall test viewport). */
  max-height: calc(100vh - 48px);
  overflow-y: auto;
}
.lock-card h2 { margin: 0 0 8px; font-size: 18px; }
.lock-card p { margin: 0 0 16px; color: var(--muted); font-size: 13.5px; }
/* Scoped to the actual email form field/button, NOT every input/button under
   .lock-card - a blanket `.lock-card button` selector (specificity 0,1,1)
   used to beat .pin-user-btn and .link-btn (0,1,0) and force them into this
   same full-width blue box, which is how the tap-name PIN buttons and the
   "sign in with email instead" link both rendered as giant solid rectangles
   (caught by actually rendering the page, not just reading the CSS). */
#lockEmail {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--bg);
  color: var(--fg);
  font: inherit;
  margin-bottom: 12px;
}
#lockSubmit {
  width: 100%;
  padding: 11px;
  border: 0;
  border-radius: 8px;
  background: var(--accent);
  color: #fff;
  font: inherit;
  font-weight: 600;
  cursor: pointer;
}
.lock-sub { margin: 0 0 16px !important; }
.lock-error { color: var(--danger) !important; margin: 12px 0 0 !important; font-size: 13px; }
.lock-note { color: var(--accent) !important; margin: 12px 0 0 !important; font-size: 13px; }
.lock-switch { display: block; margin: 16px auto 0 !important; text-align: center; width: 100%; }

/* ---- PIN tap-name sign-in ---- */
.pin-users { display: flex; flex-wrap: wrap; justify-content: center; gap: 10px; margin-bottom: 4px; }
.pin-user-btn {
  display: flex; flex-direction: column; align-items: center; gap: 6px;
  background: none; border: 0; padding: 6px 4px; cursor: pointer; font: inherit;
  color: var(--fg); width: 74px;
}
.pin-user-avatar {
  width: 44px; height: 44px; border-radius: 999px; display: grid; place-items: center;
  background: var(--accent-soft); color: var(--accent); font-weight: 700; font-size: 15px;
  transition: background .12s, color .12s;
}
.pin-user-btn:hover .pin-user-avatar { background: var(--accent); color: #fff; }
.pin-user-name { font-size: 12.5px; text-align: center; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; max-width: 100%; }
.pin-user-btn:disabled { cursor: not-allowed; opacity: .5; }
.pin-user-locked { font-size: 10.5px; color: var(--danger); font-weight: 600; }

.pin-pad { text-align: center; }
.pin-pad-name { font-size: 13.5px; font-weight: 600; margin: 0 0 12px; }
.pin-dots { display: flex; justify-content: center; gap: 10px; margin-bottom: 10px; }
.pin-dots i {
  display: block; width: 13px; height: 13px; border-radius: 999px;
  background: var(--line); transition: background .1s, transform .1s;
}
.pin-dots i.filled { background: var(--accent); transform: scale(1.05); }
.pin-hidden-input {
  position: absolute; opacity: 0; height: 1px; width: 1px; overflow: hidden;
  pointer-events: none;
}
.pin-pad.shake .pin-dots { animation: pin-shake .4s; }
@keyframes pin-shake {
  10%, 90% { transform: translateX(-1px); }
  20%, 80% { transform: translateX(2px); }
  30%, 50%, 70% { transform: translateX(-4px); }
  40%, 60% { transform: translateX(4px); }
}

/* ---- generic modal (PIN settings) ---- */
.modal {
  position: fixed; inset: 0; background: rgba(0, 0, 0, .45);
  display: grid; place-items: center; padding: 20px; z-index: 20;
}
.modal-card {
  background: var(--card); border: 1px solid var(--line); border-radius: 14px;
  padding: 26px; max-width: 380px; width: 100%; box-shadow: var(--shadow);
  /* Same reasoning as .lock-card: this form (3 PIN fields + a name field +
     actions) can exceed a short viewport, and .modal is a fixed overlay with
     nothing else to scroll - without this the Save button becomes unreachable. */
  max-height: calc(100vh - 40px);
  overflow-y: auto;
}
.modal-card h2 { font-size: 18px; margin: 0 0 8px; text-transform: none; letter-spacing: 0; color: var(--fg); }
.modal-sub { margin: 0 0 18px; color: var(--muted); font-size: 13px; }
.pin-field { text-align: center; margin-bottom: 16px; }
.pin-field > span { display: block; font-size: 12px; color: var(--muted); margin-bottom: 8px; }
.pin-name-field { margin-bottom: 4px; }
.pin-name-field input {
  padding: 9px 10px; border: 1px solid var(--line); border-radius: 8px;
  background: var(--bg); color: var(--fg); font: inherit; font-size: 13.5px;
}
.modal-actions { display: flex; justify-content: flex-end; gap: 8px; margin-top: 8px; }
.btn-primary {
  background: var(--accent); color: #fff; border: 0; border-radius: 8px;
  padding: 9px 18px; font: inherit; font-weight: 600; cursor: pointer;
}
.btn-ghost {
  background: none; color: var(--muted); border: 1px solid var(--line); border-radius: 8px;
  padding: 9px 16px; font: inherit; cursor: pointer;
}
.btn-ghost:hover { color: var(--fg); border-color: var(--fg); }

/* ---- admin panel ---- */
.admin-panel { margin-top: 32px; border-top: 1px solid var(--line); padding-top: 24px; }
.admin-section-head { margin-top: 24px; }
.admin-add-form { display: flex; gap: 8px; align-items: center; margin-bottom: 10px; flex-wrap: wrap; }
.admin-add-form input[type="email"] {
  flex: 1 1 220px; padding: 9px 10px; border: 1px solid var(--line); border-radius: 8px;
  background: var(--card); color: var(--fg); font: inherit; font-size: 13.5px;
}
.admin-checkbox { display: flex; align-items: center; gap: 6px; font-size: 13px; color: var(--muted); }
.admin-add-form button {
  padding: 9px 16px; border: 0; border-radius: 8px; background: var(--accent);
  color: #fff; font: inherit; font-weight: 600; font-size: 13.5px; cursor: pointer;
}
.admin-list { list-style: none; padding: 0; margin: 0 0 4px; display: grid; gap: 8px; }
.admin-list li {
  background: var(--card); border: 1px solid var(--line); border-radius: 10px;
  padding: 10px 14px; display: flex; align-items: center; justify-content: space-between;
  gap: 10px; font-size: 13.5px;
}
.admin-list .row-main { display: flex; flex-direction: column; gap: 2px; min-width: 0; }
.admin-list .row-email { font-weight: 600; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.admin-list .row-meta { font-size: 12px; color: var(--muted); }
.admin-badge {
  font-size: 11px; font-weight: 700; text-transform: uppercase; letter-spacing: .03em;
  color: var(--accent); background: var(--accent-soft); border-radius: 999px; padding: 2px 8px;
  flex: none;
}
.admin-list .row-actions { display: flex; gap: 6px; flex: none; }
.admin-list button {
  border: 1px solid var(--line); background: transparent; color: var(--fg);
  border-radius: 7px; padding: 6px 11px; font: inherit; font-size: 12.5px; cursor: pointer;
}
.admin-list button:hover { border-color: var(--danger); color: var(--danger); }
.admin-empty { color: var(--muted); font-size: 13px; padding: 8px 2px; }
.admin-hint { color: var(--muted); font-size: 12px; margin: -2px 0 10px; }

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