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

:root {
  --bg: #0f1419;
  --panel: #1a1f2e;
  --panel-2: #232838;
  --border: #2d3444;
  --text: #e6eaf2;
  --text-muted: #8b95a8;
  --accent: #3b82f6;
  --danger: #ef4444;
  --success: #10b981;
  --warning: #f59e0b;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
}

.hidden { display: none !important; }

/* ==== Login prompt ==== */
.admin-login {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 100vh;
  text-align: center;
  gap: 16px;
}
.admin-login h1 { font-size: 32px; }
.admin-login p { color: var(--text-muted); }
.btn-link {
  color: var(--accent);
  text-decoration: none;
  font-weight: 600;
}
.btn-link:hover { text-decoration: underline; }

/* ==== Layout ==== */
.admin-app {
  display: flex;
  min-height: 100vh;
}

.admin-sidebar {
  width: 240px;
  background: var(--panel);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  padding: 16px 0;
  flex-shrink: 0;
}

.admin-logo {
  padding: 0 20px 20px;
  font-size: 18px;
  font-weight: 700;
  border-bottom: 1px solid var(--border);
  margin-bottom: 12px;
}

.admin-nav {
  display: flex;
  flex-direction: column;
  flex: 1;
}

.admin-nav a {
  padding: 10px 20px;
  color: var(--text-muted);
  text-decoration: none;
  font-size: 14px;
  font-weight: 500;
  border-left: 3px solid transparent;
  transition: all 0.15s;
}
.admin-nav a:hover {
  background: var(--panel-2);
  color: var(--text);
}
.admin-nav a.active {
  background: var(--panel-2);
  color: var(--accent);
  border-left-color: var(--accent);
}

.admin-sidebar-bottom {
  padding: 12px 20px;
  border-top: 1px solid var(--border);
  font-size: 13px;
}
.admin-me {
  color: var(--text-muted);
  margin-bottom: 10px;
  word-break: break-all;
}
.admin-back {
  color: var(--accent);
  text-decoration: none;
  font-size: 13px;
}
.admin-back:hover { text-decoration: underline; }

.admin-content {
  flex: 1;
  padding: 24px 32px;
  overflow-y: auto;
}

.admin-tab { display: none; }
.admin-tab.active { display: block; }

.admin-content h2 {
  font-size: 22px;
  margin-bottom: 20px;
}

/* ==== Stats ==== */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 16px;
}

.stat-card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 20px;
}
.stat-value {
  font-size: 28px;
  font-weight: 700;
  color: var(--accent);
  margin-bottom: 4px;
}
.stat-label {
  font-size: 13px;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

/* ==== Lists ==== */
.admin-search {
  width: 100%;
  max-width: 400px;
  padding: 10px 14px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 10px;
  color: var(--text);
  font-size: 14px;
  margin-bottom: 16px;
}
.admin-search:focus {
  outline: none;
  border-color: var(--accent);
}

.admin-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.admin-item {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 12px 16px;
  display: flex;
  align-items: center;
  gap: 12px;
}

.admin-item-main { flex: 1; min-width: 0; }
.admin-item-title {
  font-weight: 600;
  font-size: 14px;
  margin-bottom: 4px;
  display: flex;
  align-items: center;
  gap: 8px;
}
.admin-item-sub {
  font-size: 12px;
  color: var(--text-muted);
  word-break: break-word;
}

.admin-badge {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 6px;
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
}
.badge-admin { background: rgba(59,130,246,0.2); color: var(--accent); }
.badge-group { background: rgba(16,185,129,0.2); color: var(--success); }

.admin-btn {
  padding: 6px 12px;
  border: none;
  border-radius: 8px;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  background: var(--panel-2);
  color: var(--text);
  transition: opacity 0.15s;
  flex-shrink: 0;
}
.admin-btn:hover { opacity: 0.85; }
.admin-btn-danger { background: var(--danger); color: #fff; }
.admin-btn-warning { background: var(--warning); color: #000; }
.admin-btn-sm {
  padding: 4px 8px;
  font-size: 12px;
}

.admin-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: linear-gradient(135deg, #667eea, #764ba2);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
  font-size: 14px;
  flex-shrink: 0;
  background-size: cover;
  background-position: center;
}

.admin-empty {
  padding: 40px;
  text-align: center;
  color: var(--text-muted);
  font-size: 14px;
}

.admin-info {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 14px 18px;
  margin-bottom: 16px;
  font-size: 14px;
  color: var(--text-muted);
}
.admin-info strong { color: var(--text); }

.admin-file-size { color: var(--text-muted); font-size: 12px; }
.admin-danger { color: var(--danger); }

@media (max-width: 768px) {
  .admin-app { flex-direction: column; }
  .admin-sidebar { width: 100%; }
  .admin-content { padding: 16px; }
}

.setup-form {
  display: flex;
  flex-direction: column;
  gap: 12px;
  width: 320px;
  max-width: 90vw;
  margin-top: 16px;
}

.setup-form input {
  padding: 12px 16px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 10px;
  color: var(--text);
  font-size: 15px;
}

.setup-form input:focus {
  outline: none;
  border-color: var(--accent);
}

.setup-form button {
  padding: 12px;
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: 10px;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
}

.setup-form button:hover {
  opacity: 0.9;
}

.setup-form button:disabled {
  opacity: 0.6;
  cursor: wait;
}

.setup-error {
  color: var(--danger);
  font-size: 13px;
  min-height: 18px;
  margin-top: 8px;
}

.setup-hint {
  color: var(--text-muted);
  font-size: 12px;
  margin-top: 12px;
  max-width: 320px;
  text-align: center;
}

/* ==== Превью файлов ==== */
.admin-preview {
  width: 60px;
  height: 60px;
  min-width: 60px;
  border-radius: 8px;
  overflow: hidden;
  background: var(--panel-2);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  flex-shrink: 0;
  position: relative;
  transition: transform 0.15s;
}
.admin-preview:hover {
  transform: scale(1.05);
}
.admin-preview img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}
.admin-preview-icon {
  font-size: 28px;
}
.admin-preview-type {
  position: absolute;
  bottom: 2px;
  right: 4px;
  background: rgba(0,0,0,0.65);
  color: #fff;
  font-size: 9px;
  padding: 1px 5px;
  border-radius: 6px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}
.admin-preview-play {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0,0,0,0.4);
  color: #fff;
  font-size: 20px;
  opacity: 0.9;
}

/* ==== Модалка просмотра ==== */
.admin-lightbox {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.9);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  cursor: zoom-out;
}
.admin-lightbox.hidden {
  display: none;
}
.admin-lightbox-content {
  max-width: 90vw;
  max-height: 90vh;
  background: #000;
  border-radius: 12px;
  overflow: hidden;
  cursor: default;
  position: relative;
}
.admin-lightbox img,
.admin-lightbox video {
  max-width: 90vw;
  max-height: 85vh;
  display: block;
}
.admin-lightbox audio {
  width: 500px;
  max-width: 90vw;
  margin: 30px;
}
.admin-lightbox-close {
  position: absolute;
  top: 10px;
  right: 10px;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: rgba(0,0,0,0.7);
  color: #fff;
  border: none;
  font-size: 20px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 10;
}
.admin-lightbox-close:hover {
  background: rgba(0,0,0,0.9);
}
.admin-lightbox-info {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 10px 16px;
  background: rgba(0,0,0,0.8);
  color: #fff;
  font-size: 13px;
}

/* ==== Раздел регистрации ==== */
.admin-section {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 20px;
  margin-bottom: 20px;
}
.admin-section h3 {
  font-size: 16px;
  margin-bottom: 16px;
  color: var(--text);
}

.mode-selector {
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.mode-option {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 14px 16px;
  border: 1px solid var(--border);
  border-radius: 10px;
  cursor: pointer;
  transition: all 0.15s;
}
.mode-option:hover {
  background: var(--panel-2);
}
.mode-option input[type="radio"] {
  margin-top: 4px;
  accent-color: var(--accent);
}
.mode-option:has(input:checked) {
  border-color: var(--accent);
  background: rgba(59,130,246,0.08);
}
.mode-content { flex: 1; }
.mode-title {
  font-weight: 600;
  font-size: 14px;
  margin-bottom: 4px;
}
.mode-desc {
  font-size: 12px;
  color: var(--text-muted);
}

.create-user-form,
.invite-form {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
}
.create-user-form input,
.invite-form input {
  padding: 10px 14px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text);
  font-size: 14px;
  min-width: 160px;
}
.create-user-form input:focus,
.invite-form input:focus {
  outline: none;
  border-color: var(--accent);
}
.checkbox-line {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--text-muted);
  cursor: pointer;
}
.checkbox-line input { accent-color: var(--accent); }

.error {
  color: var(--danger);
  font-size: 13px;
  margin-top: 10px;
  min-height: 18px;
}

.invite-item {
  display: flex;
  align-items: center;
  gap: 12px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 12px;
  margin-top: 10px;
}
.invite-code {
  font-family: monospace;
  font-size: 15px;
  font-weight: 700;
  color: var(--accent);
  background: var(--panel);
  padding: 6px 12px;
  border-radius: 6px;
  user-select: all;
  cursor: pointer;
  flex-shrink: 0;
}
.invite-info { flex: 1; min-width: 0; }
.invite-info-title {
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 2px;
}
.invite-info-sub {
  font-size: 12px;
  color: var(--text-muted);
}
.invite-badge {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 6px;
  font-size: 10px;
  font-weight: 700;
  text-transform: uppercase;
  margin-left: 6px;
}
.invite-badge.used { background: rgba(16,185,129,0.2); color: var(--success); }
.invite-badge.expired { background: rgba(239,68,68,0.2); color: var(--danger); }
.invite-badge.active { background: rgba(59,130,246,0.2); color: var(--accent); }