/* FILE: css/app.css */

/* === Global body/html === */
html, body {
  height: 100%;
  width: 100%;
  overflow: hidden;
  font-family: var(--font-primary);
  font-size: var(--font-size-base);
  color: var(--text-primary);
  background: var(--bg-primary);
  -webkit-text-size-adjust: 100%;
}

/* === App container === */
#app {
  display: flex;
  flex-direction: column;
  width: 100%;
  height: 100dvh;
  overflow: hidden;
  position: fixed;
  inset: 0;
}

#app.sidebar-hidden {
  grid-template-columns: 0 1fr;
}

@media (min-width: 768px) {
  #app {
    flex-direction: row;
    position: relative;
  }
}

/* === Utility === */
.hidden { display: none !important; }
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
}

/* === Panel overlay (backdrop for panels) === */
#panel-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.6);
  z-index: 999;
  animation: overlayFadeIn var(--transition-base) ease;
  cursor: pointer;
}

/* === Slide-in panels (Memory, Settings) === */
.panel {
  position: fixed;
  top: 0;
  right: 0;
  width: min(400px, 100vw);
  height: 100dvh;
  background: var(--bg-secondary);
  border-left: 1px solid var(--border-subtle);
  z-index: 1000;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  animation: panelSlideIn var(--transition-base) cubic-bezier(0.4, 0, 0.2, 1);
  box-shadow: var(--shadow-lg);
  pointer-events: auto;
}

.panel-body {
  flex: 1;
  overflow-y: auto;
  overflow-x: hidden;
  -webkit-overflow-scrolling: touch;
}

#settings-panel,
#memory-panel {
  background: var(--bg-secondary);
}

#settings-panel *,
#memory-panel * {
  pointer-events: auto !important;
}

#sidebar-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  z-index: 199;
}

body.sidebar-open #sidebar-overlay {
  display: block;
}

.panel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-5) var(--space-6);
  border-bottom: 1px solid var(--border-subtle);
  flex-shrink: 0;
}

.panel-header h2 {
  font-size: var(--font-size-lg);
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.panel-close-btn {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
  transition: all var(--transition-fast);
}

.panel-close-btn:hover {
  background: var(--bg-hover);
  color: var(--text-primary);
}

/* === Icon button base === */
.icon-btn {
  width: 34px;
  height: 34px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
  transition: all var(--transition-fast);
  flex-shrink: 0;
  position: relative;
}
.icon-btn:hover {
  background: var(--bg-hover);
  color: var(--text-primary);
}
.icon-btn:active {
  background: var(--bg-active);
  transform: scale(0.95);
}

.icon-btn svg {
  width: 18px;
  height: 18px;
  fill: currentColor;
  pointer-events: none;
}

/* === Ripple effect === */
.ripple-container {
  position: relative;
  overflow: hidden;
}

.ripple-effect {
  position: absolute;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.15);
  transform: scale(0);
  animation: ripple 0.5s ease-out forwards;
  pointer-events: none;
}

/* === Divider === */
.divider {
  height: 1px;
  background: var(--border-subtle);
  margin: var(--space-2) 0;
}

/* === Tooltip === */
[data-tooltip] {
  position: relative;
}

[data-tooltip]::after {
  content: attr(data-tooltip);
  position: absolute;
  bottom: calc(100% + 8px);
  left: 50%;
  transform: translateX(-50%);
  background: var(--bg-tertiary);
  color: var(--text-primary);
  font-size: var(--font-size-xs);
  padding: var(--space-1) var(--space-2);
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-subtle);
  white-space: nowrap;
  pointer-events: none;
  opacity: 0;
  transition: opacity var(--transition-fast);
  z-index: var(--z-tooltip);
  box-shadow: var(--shadow-sm);
}

[data-tooltip]:hover::after {
  opacity: 1;
  transition-delay: 0.3s;
}

/* === Offline banner === */
#offline-banner {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background: var(--accent-warning);
  color: #000;
  text-align: center;
  padding: var(--space-2) var(--space-4);
  font-size: var(--font-size-sm);
  font-weight: 500;
  z-index: var(--z-toast);
  animation: slideDown var(--transition-base) ease;
}

/* === Install banner === */
#install-banner {
  position: fixed;
  bottom: var(--space-4);
  left: 50%;
  transform: translateX(-50%);
  background: var(--bg-tertiary);
  border: 1px solid var(--border-accent);
  border-radius: var(--radius-lg);
  padding: var(--space-3) var(--space-5);
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-size: var(--font-size-sm);
  color: var(--text-primary);
  z-index: var(--z-toast);
  box-shadow: var(--shadow-md);
  animation: slideInUp var(--transition-base) ease;
}

#install-banner button {
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-sm);
  font-size: var(--font-size-sm);
  font-weight: 500;
}

#install-banner .install-btn {
  background: var(--accent-primary);
  color: white;
}

#install-banner .dismiss-btn {
  color: var(--text-secondary);
}

/* === Keyboard shortcuts modal grid === */
.shortcuts-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-3);
}

.shortcut-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-2) var(--space-3);
  background: var(--bg-tertiary);
  border-radius: var(--radius-sm);
}

.shortcut-keys {
  display: flex;
  gap: var(--space-1);
}

kbd {
  background: var(--bg-active);
  border: 1px solid var(--border-medium);
  border-radius: 4px;
  padding: 2px 6px;
  font-family: var(--font-mono);
  font-size: var(--font-size-xs);
  color: var(--text-primary);
}

.shortcut-desc {
  color: var(--text-secondary);
  font-size: var(--font-size-sm);
}