:root {
  --bg:      #0a0a0a;
  --surface: #161616;
  --surface-2: #1e1e1e;
  --border:  #2a2a2a;
  --text:    #f0f0f0;
  --dim:     #8a8a8a;
  --faint:   #555;

  --font: system-ui, -apple-system, 'Segoe UI', sans-serif;
  --font-mono: ui-monospace, 'SF Mono', Menlo, monospace;

  --radius: 6px;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  height: 100%;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 0.001ms !important; transition-duration: 0.001ms !important; }
}

button {
  font-family: inherit;
  font-size: 0.9rem;
  cursor: pointer;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 9px 16px;
  min-height: 40px;
  background: transparent;
  color: var(--text);
  transition: background 0.12s ease, border-color 0.12s ease;
  -webkit-tap-highlight-color: transparent;
  touch-action: manipulation;
}
button:hover { border-color: var(--dim); }
button:focus-visible, input:focus-visible, [tabindex]:focus-visible {
  outline: 1px solid var(--text);
  outline-offset: 2px;
}

.btn-primary {
  background: var(--text);
  color: var(--bg);
  border-color: var(--text);
  font-weight: 600;
}
.btn-primary:hover { background: #d0d0d0; }
.btn-primary:disabled { opacity: 0.4; cursor: not-allowed; }

.btn-icon {
  border: none;
  width: 36px; height: 36px;
  border-radius: 50%;
  display: inline-flex; align-items: center; justify-content: center;
  padding: 0;
  color: var(--dim);
  background: transparent;
  -webkit-tap-highlight-color: transparent;
  touch-action: manipulation;
}
.btn-icon:hover { color: var(--text); background: var(--surface-2); }

input[type=password], input[type=text] {
  font-family: inherit;
  font-size: 16px;
  background: var(--bg);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 12px;
  border-radius: var(--radius);
  width: 100%;
}
input::placeholder { color: var(--faint); }

.hidden { display: none !important; }

#auth-screen {
  min-height: 100vh;
  min-height: 100dvh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px;
}

.auth-card {
  width: 100%;
  max-width: 340px;
}

.wordmark {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 32px;
}
.wordmark svg { flex-shrink: 0; color: var(--text); }
.wordmark span {
  font-size: 0.95rem;
  font-weight: 600;
  letter-spacing: 0.02em;
}

.auth-card h1 {
  font-size: 1.1rem;
  font-weight: 600;
  margin: 0 0 6px;
}
.auth-card p.subtitle {
  color: var(--dim);
  font-size: 0.82rem;
  margin: 0 0 24px;
  line-height: 1.5;
}

.field { margin-bottom: 12px; }
.field label {
  display: block;
  font-size: 0.72rem;
  color: var(--dim);
  margin-bottom: 6px;
}
.field label .label-hint { color: var(--faint); }

.field-hint {
  font-size: 0.72rem;
  color: var(--dim);
  margin: 6px 0 0;
  line-height: 1.4;
}
.field-hint.error { color: var(--text); }

.strength-meter {
  --tier-color: var(--border);
  display: flex;
  gap: 5px;
  margin-top: 8px;
}
.strength-segment {
  height: 5px;
  border-radius: 2px;
  background: var(--border);
  flex: 1;
  transition: background-color 0.15s ease;
}
.strength-segment.on {
  background: var(--tier-color);
}
.strength-meter[data-tier="weak"]   { --tier-color: #d9583c; }
.strength-meter[data-tier="fair"]   { --tier-color: #d9a13c; }
.strength-meter[data-tier="good"]   { --tier-color: #8fbf5c; }
.strength-meter[data-tier="strong"] { --tier-color: #4fbf7f; }

.auth-actions { margin-top: 18px; }
.auth-actions .btn-primary { width: 100%; }

.auth-status {
  margin-top: 14px;
  font-size: 0.8rem;
  color: var(--dim);
  display: flex;
  align-items: center;
  gap: 8px;
  min-height: 18px;
}
.auth-status.error { color: var(--text); font-weight: 500; }
.auth-status .spinner { width: 12px; height: 12px; }

#app-screen {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 14px 20px;
  border-bottom: 1px solid var(--border);
  flex-wrap: wrap;
}
.topbar .wordmark { margin-bottom: 0; }
.topbar-right {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
  justify-content: flex-end;
}
.usage-pill {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--dim);
  white-space: nowrap;
}
.account-email {
  font-size: 0.78rem;
  color: var(--dim);
  font-family: var(--font-mono);
  max-width: 90px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

main.vault {
  flex: 1;
  padding: 24px 20px 60px;
  max-width: 1100px;
  width: 100%;
  margin: 0 auto;
}

.deposit-slot {
  border: 1px dashed var(--border);
  border-radius: var(--radius);
  padding: 22px;
  text-align: center;
  margin-bottom: 24px;
  cursor: pointer;
  transition: border-color 0.12s ease;
}
.deposit-slot:hover, .deposit-slot.drag-over { border-color: var(--dim); }
.deposit-slot h2 {
  font-size: 0.95rem;
  font-weight: 600;
  margin: 0 0 4px;
}
.deposit-slot p {
  color: var(--dim);
  font-size: 0.8rem;
  margin: 0 0 12px;
}

.upload-queue { margin-bottom: 20px; display: flex; flex-direction: column; gap: 6px; }
.upload-row {
  display: flex;
  align-items: center;
  gap: 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 9px 12px;
  font-size: 0.8rem;
  position: relative;
}
.upload-row .name { flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.upload-row .status { color: var(--dim); font-family: var(--font-mono); font-size: 0.72rem; min-width: 80px; text-align: right; }
.upload-row .bar { height: 2px; background: var(--border); border-radius: 2px; overflow: hidden; position: absolute; left: 0; right: 0; bottom: 0; }
.upload-row .bar-fill { height: 100%; background: var(--text); transition: width 0.2s ease; }
.upload-row.done .status { color: var(--text); }
.upload-row.error .status { text-decoration: underline; }

.section-label {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--dim);
  margin: 0 0 12px;
}

.box-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
  gap: 10px;
}

.box-tile {
  position: relative;
  aspect-ratio: 1;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  cursor: pointer;
  transition: border-color 0.12s ease;
}
.box-tile:hover { border-color: var(--dim); }

.box-body {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 8px;
  padding: 14px;
  text-align: center;
}

.box-body img, .box-body video.thumb {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.box-icon { color: var(--dim); }
.box-name {
  font-size: 0.75rem;
  color: var(--text);
  word-break: break-word;
  line-height: 1.3;
  max-height: 2.6em;
  overflow: hidden;
}
.box-play {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(180deg, transparent 40%, rgba(0,0,0,0.6));
  z-index: 1;
}

.box-menu {
  position: absolute;
  bottom: 7px; right: 7px;
  z-index: 3;
  opacity: 0;
  transition: opacity 0.12s ease;
}
.box-tile:hover .box-menu, .box-tile:focus-within .box-menu { opacity: 1; }

@media (hover: none) {
  .box-menu { opacity: 1; }
}

.box-tile.decrypting .box-icon { animation: pulse 1.1s ease-in-out infinite; }
@keyframes pulse { 0%,100% { opacity: 0.4; } 50% { opacity: 1; } }

.empty-state-icon {
  margin: 0 auto;
  display: block;
  color: var(--faint);
}
.empty-state {
  text-align: center;
  padding: 56px 20px;
  color: var(--dim);
}
.empty-state h3 {
  color: var(--text);
  font-weight: 600;
  font-size: 1rem;
  margin: 12px 0 4px;
}

#lightbox {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.94);
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 32px;
}

.lightbox-content {
  max-width: min(1000px, 100%);
  max-height: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 14px;
}
.lightbox-content img, .lightbox-content video {
  max-width: 100%;
  max-height: 72vh;
  border-radius: 4px;
  background: #000;
}
.lightbox-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--text);
  font-size: 0.85rem;
}
.lightbox-meta .fname { font-family: var(--font-mono); color: var(--dim); }
.lightbox-close {
  position: absolute;
  top: 20px; right: 20px;
}
.lightbox-generic {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 40px;
  text-align: center;
  color: var(--dim);
}

.settings-panel {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  width: 100%;
  max-width: 360px;
  text-align: left;
}
.settings-panel h2 {
  font-size: 1rem;
  font-weight: 600;
  margin: 0 0 6px;
}
.settings-panel p.subtitle {
  color: var(--dim);
  font-size: 0.8rem;
  line-height: 1.5;
  margin: 0 0 20px;
}
.settings-panel .panel-actions {
  display: flex;
  gap: 8px;
  margin-top: 20px;
}
.settings-panel .panel-actions button { flex: 1; }
.settings-panel .status-line {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--dim);
  margin-bottom: 16px;
}

#toasts {
  position: fixed;
  bottom: 16px; right: 16px;
  z-index: 200;
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.toast {
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 10px 14px;
  border-radius: var(--radius);
  font-size: 0.8rem;
  max-width: 300px;
}
.toast.error { border-color: var(--dim); font-weight: 500; }

.spinner {
  width: 16px; height: 16px;
  border-radius: 50%;
  border: 2px solid var(--border);
  border-top-color: var(--text);
  animation: spin 0.7s linear infinite;
  flex-shrink: 0;
}
@keyframes spin { to { transform: rotate(360deg); } }

@media (max-width: 560px) {
  .topbar { padding: 10px 14px; gap: 8px; }
  .topbar-right { gap: 8px; }
  .topbar-right button { padding: 8px 10px; font-size: 0.78rem; }
  .account-email { display: none; }
  main.vault { padding: 16px 12px 50px; }
  .box-grid { grid-template-columns: repeat(auto-fill, minmax(110px, 1fr)); gap: 8px; }
  .deposit-slot { padding: 18px 14px; }
  #lightbox { padding: 14px; }
  .lightbox-close { top: 10px; right: 10px; }
  .lightbox-meta { flex-wrap: wrap; justify-content: center; text-align: center; }
  .settings-panel { padding: 20px; max-width: 100%; }
  .auth-card { max-width: 100%; }
  .wordmark { margin-bottom: 22px; }
}

@media (max-width: 380px) {
  .topbar-right button span.btn-label { display: none; }
  .usage-pill { display: none; }
  .box-grid { grid-template-columns: repeat(auto-fill, minmax(96px, 1fr)); gap: 6px; }
}