/* Button System */
.btn {
  display: inline-flex; align-items: center; gap: 6px; padding: 10px 20px;
  border-radius: var(--radius-sm); border: 1px solid var(--border); font-size: 14px;
  font-weight: 600; cursor: pointer; transition: background var(--transition-fast), border-color var(--transition-fast), color var(--transition-fast), transform var(--transition-fast);
  background: var(--bg-surface); color: var(--text2);
  font-family: inherit; position: relative; overflow: hidden;
}
.btn::after {
  content: ''; position: absolute; inset: 0; background: rgba(255,255,255,0);
  transition: background var(--transition-fast);
}
.btn:hover { background: var(--bg-surface-hover); border-color: var(--border-active); color: var(--text); }
.btn:active { transform: scale(0.97); }
.btn-primary { background: var(--primary); color: var(--bg-deep); border-color: var(--primary); }
.btn-primary:hover { background: var(--primary-light); border-color: var(--primary-light); box-shadow: 0 0 24px var(--primary-glow); }
.btn-primary:active { background: var(--primary-dim); }
.btn-primary:disabled { opacity: 0.4; cursor: not-allowed; transform: none; box-shadow: none; }
.btn-primary:disabled:hover { background: var(--primary); border-color: var(--primary); box-shadow: none; }
.btn-outline { background: transparent; color: var(--text2); border-color: var(--border); }
.btn-outline:hover { border-color: var(--primary); color: var(--primary); background: rgba(82,183,136,0.06); }
.btn-ghost { background: transparent; border-color: transparent; }
.btn-ghost:hover { background: var(--bg-surface); border-color: transparent; color: var(--text); }
.btn-danger { background: rgba(233,106,106,0.12); color: #ff6b6b; border-color: rgba(233,106,106,0.25); }
.btn-danger:hover { background: rgba(233,106,106,0.25); border-color: #ff6b6b; box-shadow: 0 0 16px rgba(233,106,106,0.3); }
.btn-sm { padding: 6px 14px; font-size: 13px; }
.btn-xs { padding: 3px 10px; font-size: 11px; }
.btn-liked { background: rgba(233,106,106,0.15); color: #ff6b6b; border-color: rgba(233,106,106,0.3); }
.btn-liked:hover { background: rgba(233,106,106,0.25); border-color: #ff6b6b; }
.version-ai { background: rgba(224,122,95,0.04); border-left: 2px solid var(--accent); }
.btn-lg { padding: 14px 28px; font-size: 16px; }

/* Glass Panels */
.glass-panel {
  background: rgba(255,255,255,0.04); border: 1px solid var(--border);
  border-radius: var(--radius-lg); backdrop-filter: blur(20px); -webkit-backdrop-filter: blur(20px);
  padding: 28px; max-width: 480px; margin: 32px auto;
  box-shadow: var(--shadow); position: relative;
}
.glass-panel::before {
  content: ''; position: absolute; inset: -1px; border-radius: inherit;
  background: linear-gradient(135deg, rgba(82,183,136,0.15), transparent 50%, rgba(233,196,106,0.08));
  pointer-events: none; z-index: -1;
  mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor; mask-composite: exclude;
  padding: 1px;
}
.glass-panel h2 { font-size: 22px; margin-bottom: 20px; color: var(--text); font-weight: 700; letter-spacing: 0.5px; }
.glass-panel label { font-size: 12px; color: var(--text2); margin-bottom: 6px; display: block; font-weight: 500; letter-spacing: 0.3px; text-transform: uppercase; }
.glass-panel input, .glass-panel textarea, .glass-panel select {
  width: 100%; padding: 12px 14px; border: 1px solid var(--border); border-radius: var(--radius-sm);
  font-size: 14px; background: rgba(0,0,0,0.2); color: var(--text); outline: none;
  transition: all var(--transition-fast); font-family: inherit;
}
.glass-panel input:focus, .glass-panel textarea:focus, .glass-panel select:focus {
  border-color: var(--primary); box-shadow: 0 0 20px var(--primary-glow), inset 0 0 20px rgba(82,183,136,0.03);
  background: rgba(0,0,0,0.3);
}
.glass-panel input:hover, .glass-panel textarea:hover, .glass-panel select:hover {
  border-color: var(--border-active);
}
.glass-panel textarea { resize: vertical; }
.glass-panel .btn { margin-top: 4px; }
.glass-panel .form-group { margin-bottom: 18px; }
.glass-panel .form-actions { display: flex; gap: 10px; margin-top: 16px; }
.glass-panel .msg { margin-top: 6px; font-size: 13px; min-height: 16px; color: var(--text2); padding: 4px 0; }
select option { background: #0d2818; color: var(--text); padding: 8px; }

/* Toast */
.toast {
  position: fixed; bottom: 40px; left: 50%; transform: translateX(-50%) translateY(20px);
  padding: 12px 28px; border-radius: var(--radius-sm); font-size: 13px; color: var(--text);
  opacity: 0; transition: opacity 0.35s cubic-bezier(0.4, 0, 0.2, 1), transform 0.35s cubic-bezier(0.4, 0, 0.2, 1);
  pointer-events: none; z-index: 999;
  background: rgba(7,26,15,0.9); border: 1px solid var(--border);
  box-shadow: 0 8px 32px rgba(0,0,0,0.4); font-weight: 500;
}
.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }
.toast.success { border-color: var(--primary); box-shadow: 0 8px 32px rgba(0,0,0,0.4), 0 0 20px var(--primary-glow); }
.toast.error { border-color: #e63946; box-shadow: 0 8px 32px rgba(0,0,0,0.4), 0 0 20px rgba(230,57,70,0.2); }
.toast.info { border-color: #457b9d; }

/* Badge / Notifications */
.badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 16px;
  height: 16px;
  padding: 0 4px;
  border-radius: 8px;
  background: #e74c3c;
  color: #fff;
  font-size: 10px;
  font-weight: 700;
  line-height: 1;
}
.nav-btn .badge {
  position: absolute;
  right: 6px;
  top: 50%;
  transform: translateY(-50%);
  z-index: 2;
}
.noti-unread {
  background: rgba(231, 76, 60, 0.06);
  border-left: 3px solid #e74c3c;
}
.noti-icon {
  font-size: 18px;
  flex-shrink: 0;
  margin-top: 2px;
}
.noti-body {
  flex: 1;
  min-width: 0;
}
.noti-msg {
  font-size: 13px;
  color: var(--text);
  line-height: 1.4;
}
.noti-meta {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 4px;
  font-size: 11px;
  color: var(--text3);
}
.noti-node {
  color: var(--primary);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  max-width: 200px;
}
.noti-time {
  flex-shrink: 0;
}
.noti-delete {
  position: absolute;
  top: 8px;
  right: 8px;
  width: 22px;
  height: 22px;
  border: none;
  background: transparent;
  color: var(--text3);
  font-size: 16px;
  cursor: pointer;
  border-radius: 4px;
  display: flex;
  align-items: center;
  justify-content: center;
  line-height: 1;
  z-index: 2;
}
.noti-delete:hover {
  background: rgba(231,76,60,0.15);
  color: #e74c3c;
}

/* User Management */
.user-item:hover { background: rgba(255,255,255,0.03); border-radius: var(--radius-sm); }
.user-item .root-badge { font-size: 10px; padding: 2px 8px; border-radius: 4px; background: var(--primary); color: var(--bg-deep); vertical-align: middle; }