/* ==========================================================================
   CHAT-FREE — BASE STYLES & RESET (base.css)
   ========================================================================== */

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

html, body {
  width: 100vw;
  height: 100vh;
  overflow: hidden;
  background-color: var(--bg-canvas);
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  color: var(--text-primary);
  -webkit-font-smoothing: antialiased;
  scroll-behavior: smooth;
  transition: background-color 0.25s ease, color 0.25s ease;
}

button:active:not(:disabled), .action-btn:active, .icon-btn-ghost:active {
  transform: scale(0.97);
  transition: transform 0.08s ease;
}

/* Scrollbars */
::-webkit-scrollbar {
  width: 6px;
  height: 6px;
}
::-webkit-scrollbar-track {
  background: transparent;
}
::-webkit-scrollbar-thumb {
  background: rgba(128, 128, 128, 0.22);
  border-radius: 10px;
  transition: background 0.2s ease;
}
::-webkit-scrollbar-thumb:hover {
  background: rgba(128, 128, 128, 0.42);
}

/* Base Layout */
#app, .grok-app, .grok-layout {
  display: flex;
  flex-direction: row;
  width: 100vw;
  height: 100vh;
  position: relative;
  overflow: hidden;
  background-color: var(--bg-canvas);
}

/* Responsive utility */
@media (min-width: 769px) {
  .mobile-only {
    display: none !important;
  }
}
@media (max-width: 768px) {
  .mobile-only {
    display: flex !important;
  }
}

/* General Buttons */
.primary-btn {
  background: var(--text-primary);
  color: var(--text-inverse) !important;
  border: none;
  border-radius: 12px;
  padding: 10px 20px;
  font-weight: 600;
  font-size: 13.5px;
  cursor: pointer;
  transition: all 0.15s ease;
}

.primary-btn:hover {
  opacity: 0.9;
}

.primary-btn-sm {
  background: var(--text-primary);
  color: var(--text-inverse) !important;
  border: none;
  border-radius: 8px;
  padding: 6px 14px;
  font-size: 12.5px;
  font-weight: 600;
  cursor: pointer;
  transition: opacity 0.15s ease;
}
.primary-btn-sm:hover {
  opacity: 0.9;
}

.secondary-btn {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  color: var(--text-primary);
  border-radius: 12px;
  padding: 9px 18px;
  font-weight: 500;
  font-size: 13px;
  cursor: pointer;
  transition: all 0.15s ease;
}

.secondary-btn:hover {
  background: var(--bg-sidebar-hover);
}

.danger-btn {
  background: rgba(239, 68, 68, 0.1);
  border: 1px solid rgba(239, 68, 68, 0.3);
  color: #f87171;
  border-radius: 12px;
  padding: 9px 18px;
  font-weight: 500;
  font-size: 13px;
  cursor: pointer;
  transition: all 0.15s ease;
}

.danger-btn:hover {
  background: rgba(239, 68, 68, 0.2);
}

.icon-btn-ghost {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  border: none;
  color: var(--text-secondary);
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.18s cubic-bezier(0.2, 0, 0, 1);
}
.icon-btn-ghost:hover {
  background: var(--bg-sidebar-hover);
  color: var(--text-primary);
}

.icon-btn-sm {
  width: 30px;
  height: 30px;
  border-radius: 8px;
  background: transparent;
  border: 1px solid var(--border-subtle);
  color: var(--text-secondary);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.15s ease;
}
.icon-btn-sm:hover {
  background: var(--bg-sidebar-hover);
  color: var(--text-primary);
  border-color: var(--border-medium);
}

.close-btn {
  background: transparent;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  font-size: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: color 0.15s ease;
}
.close-btn:hover {
  color: var(--text-primary);
}

.close-btn-ghost {
  width: 32px;
  height: 32px;
  border-radius: 8px;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.15s ease;
}
.close-btn-ghost:hover {
  background: var(--bg-hover);
  color: var(--text-primary);
}

/* Range Slider */
input[type="range"] {
  -webkit-appearance: none;
  width: 100%;
  background: transparent;
  height: 20px;
}
input[type="range"]:focus {
  outline: none;
}
input[type="range"]::-webkit-slider-runnable-track {
  width: 100%;
  height: 4px;
  background: var(--border-medium);
  border-radius: 2px;
}
input[type="range"]::-webkit-slider-thumb {
  height: 16px;
  width: 16px;
  border-radius: 50%;
  background: var(--btn-send-bg);
  cursor: pointer;
  -webkit-appearance: none;
  margin-top: -6px;
  border: 1px solid var(--border-medium);
}

/* Avatar Utilities */
.user-avatar-column {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
}

.user-avatar-lg, .user-avatar-sm, .active-char-avatar, .character-avatar-badge, .char-avatar-preview-box {
  position: relative;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-hover);
  color: var(--text-primary);
  font-weight: 600;
  user-select: none;
}

.user-avatar-lg img, .user-avatar-sm img, .active-char-avatar img, .character-avatar-badge img, .char-avatar-preview-box img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: inherit;
  display: block;
}

.avatar-edit-actions {
  display: flex;
  flex-direction: row;
  align-items: center;
  gap: 6px;
}

.btn-user-avatar-upload, .btn-avatar-upload {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 4px 10px;
  background: var(--bg-sidebar-hover);
  border: 1px solid var(--border-subtle);
  color: var(--text-primary);
  border-radius: 6px;
  font-size: 11px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.15s ease;
}

.btn-user-avatar-upload:hover, .btn-avatar-upload:hover {
  background: var(--bg-hover);
  border-color: var(--text-muted);
}

.btn-avatar-ghost {
  background: transparent;
  border: none;
  color: var(--text-muted);
  font-size: 11px;
  cursor: pointer;
  padding: 4px 6px;
  transition: color 0.15s ease;
}
.btn-avatar-ghost:hover {
  color: var(--danger);
}

/* Toast Notification */
.toast-notification {
  position: fixed;
  top: 20px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--popover-bg);
  border: 1px solid var(--border-medium);
  color: var(--text-primary);
  padding: 10px 18px;
  border-radius: 20px;
  font-size: 13px;
  font-weight: 500;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.25);
  z-index: 1000;
  animation: toastPop 0.2s cubic-bezier(0.16, 1, 0.3, 1);
}

/* Utility */
.hidden:not(.modal) {
  display: none !important;
}