:root {
  --bg: #0f0f13;
  --surface: #1a1a22;
  --surface-hover: #252530;
  --text: #e0e0e5;
  --text-dim: #888899;
  --accent: #7c5cff;
  --accent-hover: #9470ff;
  --danger: #ff4d6d;
  --success: #2ecc71;
  --border: #2a2a35;
  --radius: 8px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, sans-serif;
  line-height: 1.5;
  min-height: 100vh;
}

header {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  padding: 1rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.75rem;
  position: sticky;
  top: 0;
  z-index: 10;
}

header h1 { font-size: 1.25rem; font-weight: 600; }

nav { display: flex; gap: 0.5rem; }

.tab-btn {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text-dim);
  padding: 0.4rem 0.9rem;
  border-radius: var(--radius);
  cursor: pointer;
  font-size: 0.9rem;
  transition: 0.15s;
}

.tab-btn:hover { background: var(--surface-hover); color: var(--text); }
.tab-btn.active { background: var(--accent); color: #fff; border-color: var(--accent); }

#global-status {
  font-size: 0.8rem;
  padding: 0.25rem 0.6rem;
  border-radius: 999px;
  font-weight: 500;
}
.status-idle { background: rgba(46,204,113,0.15); color: var(--success); }
.status-busy { background: rgba(124,92,255,0.15); color: var(--accent); }

main { max-width: 960px; margin: 0 auto; padding: 1.5rem; }

.tab { display: none; animation: fade 0.2s ease; }
.tab.active { display: block; }
@keyframes fade { from { opacity: 0; transform: translateY(4px); } to { opacity: 1; transform: none; } }

h2 { font-size: 1.1rem; margin-bottom: 1rem; color: #fff; }
h3 { font-size: 0.95rem; margin-bottom: 0.6rem; color: var(--text); }

.form-group { margin-bottom: 1rem; }
.form-group label { display: block; font-size: 0.85rem; color: var(--text-dim); margin-bottom: 0.3rem; }
.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 0.55rem 0.7rem;
  border-radius: var(--radius);
  font-size: 0.95rem;
  outline: none;
  transition: border 0.15s;
}
.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus { border-color: var(--accent); }

.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }

button {
  background: var(--surface-hover);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 0.55rem 1rem;
  border-radius: var(--radius);
  cursor: pointer;
  font-size: 0.9rem;
  transition: 0.15s;
}
button:hover { background: var(--surface); }
button.primary {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
  font-weight: 600;
  padding: 0.65rem 1.4rem;
}
button.primary:hover { background: var(--accent-hover); }
button.small { padding: 0.35rem 0.75rem; font-size: 0.85rem; }
button.danger { color: var(--danger); border-color: rgba(255,77,109,0.35); }
button.danger:hover { background: rgba(255,77,109,0.1); }

.checkbox-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}
.checkbox-item {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  background: var(--surface);
  border: 1px solid var(--border);
  padding: 0.35rem 0.6rem;
  border-radius: var(--radius);
  font-size: 0.85rem;
  cursor: pointer;
  user-select: none;
}
.checkbox-item input { cursor: pointer; }
.checkbox-item:hover { border-color: var(--accent); }

.result-area {
  margin-top: 1rem;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 0.75rem;
}
.result-area img {
  width: 100%;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  cursor: pointer;
}

.gallery-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  gap: 0.75rem;
}
.gallery-item {
  position: relative;
  aspect-ratio: 1;
  background: var(--surface);
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--border);
  cursor: pointer;
}
.gallery-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.2s;
}
.gallery-item:hover img { transform: scale(1.05); }
.gallery-item .delete-btn {
  position: absolute;
  top: 0.3rem;
  right: 0.3rem;
  background: rgba(255,77,109,0.9);
  color: #fff;
  border: none;
  border-radius: 50%;
  width: 28px;
  height: 28px;
  font-size: 1rem;
  cursor: pointer;
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 2;
  line-height: 1;
}
.gallery-item:hover .delete-btn { display: flex; }

.admin-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem;
  margin-bottom: 1rem;
}

.item-list { margin-bottom: 0.75rem; }
.item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.45rem 0.6rem;
  border-radius: var(--radius);
  background: var(--bg);
  margin-bottom: 0.4rem;
  font-size: 0.9rem;
}
.item.active { border: 1px solid var(--accent); }
.item span { font-size: 0.75rem; color: var(--text-dim); }

.hint { font-size: 0.8rem; color: var(--text-dim); margin-top: 0.5rem; }
.hint code { background: var(--bg); padding: 0.1rem 0.3rem; border-radius: 4px; font-size: 0.75rem; }

details summary {
  cursor: pointer;
  color: var(--accent);
  font-size: 0.9rem;
  margin-bottom: 0.5rem;
}

.modal {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.85);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
  padding: 2rem;
}
.modal.hidden { display: none; }
.modal-viewport {
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  height: 100%;
  cursor: grab;
}
.modal-viewport.dragging { cursor: grabbing; }
.modal-viewport img {
  max-width: 100%;
  max-height: 100%;
  width: auto;
  height: auto;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  transform-origin: center center;
  user-select: none;
  -webkit-user-drag: none;
}
#modal-close {
  position: absolute;
  top: 1rem;
  right: 1.5rem;
  font-size: 2rem;
  color: #fff;
  cursor: pointer;
}

.toast {
  position: fixed;
  bottom: 1.5rem;
  right: 1.5rem;
  background: var(--surface);
  border: 1px solid var(--border);
  padding: 0.7rem 1rem;
  border-radius: var(--radius);
  font-size: 0.9rem;
  z-index: 50;
  animation: slideIn 0.3s ease;
}
.toast.ok { border-color: var(--success); color: var(--success); }
.toast.err { border-color: var(--danger); color: var(--danger); }
@keyframes slideIn { from { transform: translateY(20px); opacity: 0; } to { transform: none; opacity: 1; } }

.login-overlay {
  position: fixed;
  inset: 0;
  background: var(--bg);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 200;
  transition: opacity 0.3s ease;
}

.login-overlay.hidden {
  opacity: 0;
  pointer-events: none;
}

.login-box {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 2rem;
  width: 100%;
  max-width: 360px;
  text-align: center;
}

.login-box h2 {
  margin-bottom: 0.5rem;
}

.login-box p {
  color: var(--text-dim);
  font-size: 0.9rem;
  margin-bottom: 1.5rem;
}

.login-error {
  color: var(--danger);
  font-size: 0.85rem;
  margin-top: 0.75rem;
  min-height: 1.2rem;
}

#btn-logout {
  font-size: 0.8rem;
}

@media (max-width: 600px) {
  .form-row { grid-template-columns: 1fr; }
  header { flex-direction: column; align-items: flex-start; }
}