:root {
  --bg: #0a0a0b;
  --bg-panel: #111214;
  --bg-elevated: #17181b;
  --border: #26282c;
  --text: #e8e9ea;
  --text-dim: #8b8e94;
  --accent: #66e83d;
  --accent-dim: #3f9427;
  --accent-text: #071103;
  --danger: #ff5c5c;
  --radius: 10px;
  font-size: 15px;
}

* { box-sizing: border-box; }

/* Admin panel stays invisible until the session is confirmed authorized. */
body.locked .topbar,
body.locked .layout { display: none; }

html, body {
  margin: 0;
  height: 100%;
  background: var(--bg);
  color: var(--text);
  font-family: "Segoe UI", system-ui, -apple-system, sans-serif;
  overflow: hidden;
}

/* ---------- Top bar ---------- */

.topbar {
  height: 54px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 18px;
  border-bottom: 1px solid var(--border);
  background: var(--bg-panel);
}

.brand { display: flex; align-items: baseline; gap: 12px; }

.brand-mark {
  font-weight: 900;
  font-size: 1.35rem;
  letter-spacing: 0.12em;
  color: var(--accent);
}

.brand-sub {
  color: var(--text-dim);
  font-size: 0.85rem;
  letter-spacing: 0.02em;
}

.topbar-status { color: var(--text-dim); font-size: 0.85rem; }

/* ---------- Layout ---------- */

.layout {
  display: grid;
  grid-template-columns: 224px 1fr 300px;
  height: calc(100% - 54px);
}

.panel-title {
  font-size: 0.78rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--text-dim);
  margin-bottom: 10px;
}

.panel-title .count { color: var(--accent); }

/* ---------- Gallery ---------- */

.gallery {
  border-right: 1px solid var(--border);
  background: var(--bg-panel);
  padding: 14px;
  overflow-y: auto;
}

.gallery-title {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
}

.btn-small { padding: 3px 9px; font-size: 0.75rem; }

.gallery-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}

.thumb-wrap { position: relative; }

.thumb-delete {
  position: absolute;
  top: 4px;
  right: 4px;
  width: 20px;
  height: 20px;
  padding: 0;
  border: none;
  border-radius: 5px;
  background: rgba(10, 10, 11, 0.8);
  color: var(--text-dim);
  font-size: 0.95rem;
  line-height: 1;
  cursor: pointer;
  opacity: 0;
  transition: opacity 0.12s, color 0.12s;
}

.thumb-wrap:hover .thumb-delete { opacity: 1; }
.thumb-delete:hover { color: var(--danger); }

.thumb {
  position: relative;
  display: block;
  width: 100%;
  aspect-ratio: 1;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: #0d0e0f;
  cursor: pointer;
  padding: 0;
  overflow: hidden;
  transition: border-color 0.12s;
}

.thumb img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  display: block;
}

.thumb .thumb-name {
  position: absolute;
  left: 0; right: 0; bottom: 0;
  font-size: 0.62rem;
  padding: 2px 4px;
  background: rgba(10, 10, 11, 0.75);
  color: var(--text-dim);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.thumb:hover { border-color: var(--text-dim); }
.thumb.active { border-color: var(--accent); box-shadow: 0 0 0 1px var(--accent); }
.thumb.active .thumb-name { color: var(--accent); }

/* ---------- Stage ---------- */

.stage {
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.stage-canvas-wrap {
  position: relative;
  flex: 1;
  min-height: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background:
    radial-gradient(ellipse at center, #131416 0%, var(--bg) 75%);
}

#preview {
  max-width: calc(100% - 32px);
  max-height: calc(100% - 32px);
  border-radius: 6px;
  box-shadow: 0 12px 48px rgba(0, 0, 0, 0.6);
}

.stage-overlay {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 14px;
  background: rgba(10, 10, 11, 0.82);
  color: var(--text-dim);
  font-size: 0.9rem;
  z-index: 5;
}

.stage-overlay[hidden] { display: none; }

.spinner {
  width: 34px;
  height: 34px;
  border-radius: 50%;
  border: 3px solid var(--border);
  border-top-color: var(--accent);
  animation: spin 0.9s linear infinite;
}

@keyframes spin { to { transform: rotate(360deg); } }

.stage-bar {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 16px;
  border-top: 1px solid var(--border);
  background: var(--bg-panel);
}

.stage-print-name { font-weight: 600; font-size: 0.9rem; }
.stage-spacer { flex: 1; }

/* ---------- Controls ---------- */

.controls {
  border-left: 1px solid var(--border);
  background: var(--bg-panel);
  padding: 16px 14px 24px;
  overflow-y: auto;
}

.control-group {
  margin-bottom: 20px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--border);
}

.control-group:last-child { border-bottom: none; }

.slider-row {
  display: grid;
  grid-template-columns: 1fr 52px;
  grid-template-areas: "label value" "slider slider";
  align-items: center;
  margin-bottom: 10px;
  gap: 2px 8px;
}

.slider-row label {
  grid-area: label;
  font-size: 0.82rem;
  color: var(--text);
}

.slider-row .value {
  grid-area: value;
  font-size: 0.78rem;
  color: var(--accent);
  text-align: right;
  font-variant-numeric: tabular-nums;
}

.slider-row input[type="range"] { grid-area: slider; width: 100%; }

input[type="range"] {
  appearance: none;
  -webkit-appearance: none;
  height: 4px;
  border-radius: 2px;
  background: var(--border);
  outline: none;
  cursor: pointer;
}

input[type="range"]::-webkit-slider-thumb {
  appearance: none;
  -webkit-appearance: none;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--accent);
  border: none;
}

input[type="range"]::-moz-range-thumb {
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--accent);
  border: none;
}

/* ---------- Buttons ---------- */

.btn {
  background: var(--bg-elevated);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 8px 14px;
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.12s, border-color 0.12s, color 0.12s;
  white-space: nowrap;
}

.btn:hover { border-color: var(--text-dim); }
.btn:disabled { opacity: 0.45; cursor: default; }

.btn-primary {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--accent-text);
}

.btn-primary:hover:not(:disabled) { background: #79f452; border-color: #79f452; }

.btn-ghost { background: transparent; }

.btn-ghost[aria-pressed="true"] {
  color: var(--accent);
  border-color: var(--accent-dim);
}

.btn-block { width: 100%; margin-top: 8px; }

/* ---------- Mockup picker & presets ---------- */

.panel-select {
  width: 100%;
  background: var(--bg-elevated);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 7px 8px;
  font-size: 0.85rem;
}

.preset-buttons {
  display: flex;
  gap: 6px;
}

.preset-buttons .btn { flex: 1; }

.preset-name-form { margin-bottom: 10px; }

.preset-name-form input {
  width: 100%;
  background: var(--bg-elevated);
  color: var(--text);
  border: 1px solid var(--accent-dim);
  border-radius: 6px;
  padding: 7px 9px;
  font-size: 0.85rem;
  margin-bottom: 8px;
  outline: none;
}

.preset-list {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.preset-empty {
  color: var(--text-dim);
  font-size: 0.78rem;
  line-height: 1.4;
}

.preset-row {
  display: flex;
  align-items: center;
  gap: 8px;
  width: 100%;
  padding: 7px 9px;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text);
  font-size: 0.82rem;
  cursor: pointer;
  text-align: left;
  transition: border-color 0.12s;
}

.preset-row:hover { border-color: var(--text-dim); }

.preset-row.active {
  border-color: var(--accent-dim);
  color: var(--accent);
}

.preset-row .preset-name {
  flex: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.preset-row .preset-tag {
  flex-shrink: 0;
  font-size: 0.68rem;
  color: var(--text-dim);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 1px 7px;
}

.preset-row .preset-edited {
  flex-shrink: 0;
  font-size: 0.68rem;
  color: var(--accent);
}

.preset-row .preset-remove {
  flex-shrink: 0;
  border: none;
  background: none;
  color: var(--text-dim);
  font-size: 0.95rem;
  line-height: 1;
  padding: 0 2px;
  cursor: pointer;
  opacity: 0;
  transition: opacity 0.12s, color 0.12s;
}

.preset-row:hover .preset-remove { opacity: 1; }
.preset-row .preset-remove:hover { color: var(--danger); }

/* ---------- Export ---------- */

.export-row { display: flex; flex-direction: column; gap: 10px; margin-bottom: 4px; }

.select-label {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.82rem;
  color: var(--text);
}

.select-label select {
  flex: 1;
  background: var(--bg-elevated);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 6px 8px;
  font-size: 0.82rem;
}

.select-label input[type="range"] { flex: 1; }

#exportQualityValue {
  color: var(--accent);
  font-size: 0.78rem;
  width: 26px;
  text-align: right;
  font-variant-numeric: tabular-nums;
}

.save-zip {
  display: block;
  text-align: center;
  text-decoration: none;
  border-color: var(--accent-dim);
  color: var(--accent);
}

.save-zip[hidden] { display: none; }

.progress {
  position: relative;
  margin-top: 10px;
  height: 22px;
  border: 1px solid var(--border);
  border-radius: 6px;
  overflow: hidden;
  background: var(--bg-elevated);
}

.progress-fill {
  position: absolute;
  inset: 0 auto 0 0;
  width: 0%;
  background: var(--accent-dim);
  transition: width 0.15s;
}

.progress-label {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  color: var(--text);
}

/* ---------- Login ---------- */

.login-overlay {
  position: fixed;
  inset: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: center;
  /* fully opaque — nothing of the admin panel shows through */
  background: var(--bg);
}

.login-overlay[hidden] { display: none; }

.login-card {
  display: flex;
  flex-direction: column;
  gap: 12px;
  width: min(320px, calc(100vw - 48px));
  padding: 28px 26px;
  border: 1px solid var(--border);
  border-radius: 14px;
  background: var(--bg-panel);
  text-align: center;
}

.login-brand {
  font-weight: 900;
  font-size: 1.8rem;
  letter-spacing: 0.14em;
  color: var(--accent);
}

.login-hint { margin: 0; color: var(--text-dim); font-size: 0.85rem; }

.login-card input {
  background: var(--bg-elevated);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 9px 12px;
  font-size: 0.9rem;
  outline: none;
}

.login-card input:focus { border-color: var(--accent-dim); }

.login-error { color: var(--danger); font-size: 0.8rem; }

/* ---------- Scrollbars ---------- */

::-webkit-scrollbar { width: 10px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 5px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-dim); }

/* ---------- Narrow screens ---------- */

@media (max-width: 1100px) {
  html, body { overflow: auto; }
  .layout {
    grid-template-columns: 1fr;
    grid-template-rows: auto minmax(60vh, auto) auto;
    height: auto;
  }
  .gallery { border-right: none; border-bottom: 1px solid var(--border); }
  .gallery-grid { grid-template-columns: repeat(auto-fill, minmax(90px, 1fr)); }
  .controls { border-left: none; border-top: 1px solid var(--border); }
}