// Copyright (c) Microsoft Corporation.
// Licensed under the MIT License.

:root {
  --title-bar-height: 40px;
  --title-bar-bg: #e5e5e5;
  --border-color: #d0d0d0;
  --button-hover-bg: rgba(0, 0, 0, 0.05);
  --button-active-bg: rgba(0, 0, 0, 0.1);
  --tab-bg: #ffffff;
  --tab-inactive-bg: #f0f0f0;
  --tab-border: #d0d0d0;
  --close-button-hover: #e81123;
  --text-color: #333333;
  --toolbar-bg: #e5e5e5;
  --layout-button-left: 4px;
  --layout-button-width: 28px;
  --layout-button-height: 28px;
  --layout-button-area-width: 36px;
}

/* Platform-specific adjustments */
.platform-macos {
  --title-bar-height: 36px;
  --layout-button-left: 78px;
  --layout-button-area-width: calc(36px + var(--layout-button-left));
}

.platform-linux {
  --title-bar-height: 40px;
}

body {
  margin: 0;
  padding-top: 0;
  overflow: hidden;
  font-family:
    -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}

/* Title Bar */
.title-bar {
  position: fixed;
  top: 0;
  left: var(
    --layout-button-area-width
  ); /* Start after the layout toggle button */
  right: 0;
  height: var(--title-bar-height);
  background: var(--title-bar-bg);
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: flex-end;
  z-index: 10000;
  -webkit-app-region: no-drag;
  transition:
    left 0.2s ease,
    right 0.2s ease;
}

/* Layout-specific positioning */
/* When in horizontal layout with chat sidebar, browser controls should be positioned over browser area */
body.horizontal-layout.has-sidebar .title-bar {
  left: var(--sidebar-width, 400px);
  padding-left: 8px; /* Add some padding since navigation buttons are the first element */
}

/* Left Side Controls */
.title-bar-left {
  display: flex;
  align-items: center;
  flex-shrink: 0;
  padding-bottom: 4px;
}

.title-bar-button {
  width: 28px;
  height: 28px;
  border: none;
  background: transparent;
  border-radius: 4px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 11px;
  color: var(--text-color);
  margin: 0 1px;
}

.title-bar-button:hover {
  background: var(--button-hover-bg);
}

.title-bar-button:active {
  background: var(--button-active-bg);
}

.title-bar-button:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.title-bar-button:disabled:hover {
  background: transparent;
}

.layout-toggle {
  position: fixed;
  top: 0;
  left: 0xp;
  width: var(--layout-button-area-width);
  height: var(--title-bar-height);
  background: var(--title-bar-bg);
  border-bottom: 1px solid var(--border-color);
}

/* Absolute positioned layout toggle button */
.layout-toggle-absolute {
  position: relative;
  top: 8px;
  left: var(--layout-button-left);
  width: var(--layout-button-width);
  height: var(--layout-button-height);
  border: none;
  background: transparent;
  border-radius: 4px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 11px;
  color: var(--text-color);
  z-index: 10004;
  -webkit-app-region: no-drag;
  pointer-events: auto;
}

.layout-toggle-absolute:hover {
  background: var(--button-hover-bg);
}

.layout-toggle-absolute:active {
  background: var(--button-active-bg);
}

/* Ensure toggle button area is not draggable */
.layout-toggle-absolute::before {
  content: "";
  position: absolute;
  top: -4px;
  left: -4px;
  right: -4px;
  bottom: -4px;
  -webkit-app-region: no-drag;
  pointer-events: none;
}

.platform-macos .layout-toggle-absolute {
  left: 78px;
  top: 4px;
}

.browser-nav {
  display: flex;
  align-items: center;
  gap: 1px;
}

.nav-separator {
  width: 1px;
  height: 18px;
  background: var(--border-color);
  margin: 0 8px;
}

/* Center Area */
.title-bar-center {
  flex: 1;
  display: flex;
  align-items: center;
  min-width: 0;
  padding: 0px;
  position: relative;
  height: 100%;
  -webkit-app-region: no-drag;
}

/* Draggable regions based on mode */
.chat-only-mode .title-bar-center {
  -webkit-app-region: drag;
}

.chat-only-mode .browser-nav,
.chat-only-mode .tab-container,
.chat-only-mode .window-controls {
  display: none;
}

.chat-only-mode .app-title {
  display: flex;
}

body.horizontal-layout.has-sidebar .app-title {
  display: none;
}

/* Tab Container */
.tab-container {
  flex: 1;
  display: flex;
  align-items: flex-end;
  min-width: 0;
  gap: 4px;
}

.tab-bar {
  display: flex;
  flex: 0 1 auto;
  min-width: 0;
  overflow: hidden;
  gap: 1px;
  padding: 0 8px;
}

.tab-drag-region {
  flex: 1;
  height: var(--title-bar-height);
  min-width: 50px;
  -webkit-app-region: drag;
  cursor: default;
}

.tab {
  min-width: 80px;
  max-width: 200px;
  flex: 1;
  height: 32px;
  background: var(--title-bar-bg);
  border: 1px solid var(--tab-border);
  border-bottom: 1px solid transparent;
  border-radius: 8px 8px 0 0;
  display: flex;
  align-items: center;
  padding: 0 8px;
  cursor: pointer;
  font-size: 12px;
  overflow: hidden;
  user-select: none;
  -webkit-user-select: none;
  position: relative;
  margin-top: 8px;
  z-index: 2;
  -webkit-app-region: no-drag;
}

.tab:hover:not(.active) {
  background: var(--button-hover-bg);
}

.tab.active {
  background: white;
  border-color: var(--tab-border);
  border-bottom: none;
  z-index: 3;
  position: relative;
  top: 1px;
}

.tab-favicon {
  width: 16px;
  height: 16px;
  margin-right: 6px;
  flex-shrink: 0;
}

.tab-title {
  flex: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  font-size: 11px;
}

.tab-close {
  width: 16px;
  height: 16px;
  margin-left: 4px;
  background: transparent;
  border: none;
  border-radius: 2px;
  cursor: pointer;
  font-size: 8px;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity 0.2s;
}

.tab:hover .tab-close {
  opacity: 1;
}

.tab-close:hover {
  background: var(--close-button-hover);
  color: white;
}

.new-tab-button {
  width: 24px;
  height: 24px;
  background: transparent;
  border: none;
  border-radius: 4px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 11px;
  margin-left: 4px;
  flex-shrink: 0;
  z-index: 1;
  position: relative;
  -webkit-app-region: no-drag;
  margin-bottom: 4px;
}

.new-tab-button:hover {
  background: var(--button-hover-bg);
}

/* App Title (Chat-Only Mode) */
.app-title {
  flex: 1;
  display: none;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  font-weight: 500;
  color: var(--text-color);
  user-select: none;
  -webkit-user-select: none;
  -webkit-app-region: drag;
  cursor: default;
  text-align: center;
  margin-left: 44px; /* Account for toggle button width + safe spacing */
  height: 100%;
}

/* Right Side */
.title-bar-right {
  display: flex;
  align-items: flex-end;
  flex-shrink: 0;
}

.drag-region {
  flex: 1;
  height: 100%;
  -webkit-app-region: drag;
  min-width: 50px;
}

.tab-bar {
  display: flex;
  min-width: 0;
  gap: 1px;
  z-index: 1;
  position: relative;
}

/* Window Controls */
.window-controls {
  display: flex;
  align-items: center;
}

.window-control {
  width: 46px;
  height: var(--title-bar-height);
  border: none;
  background: transparent;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 10px;
  color: var(--text-color);
}

.window-control:hover {
  background: var(--button-hover-bg);
}

.window-control.close:hover {
  background: var(--close-button-hover);
  color: white;
}

/* macOS specific */
.platform-macos .window-controls {
  display: none;
}

/* Responsive behavior */
@media (max-width: 800px) {
  .tab {
    min-width: 60px;
    max-width: 120px;
  }
}

/* Sidebar Title Bar */
.sidebar-title-bar {
  position: fixed;
  top: 0;
  left: var(
    --layout-button-area-width
  ); /* Start after the layout toggle button */
  width: calc(
    var(--sidebar-width, 400px) - var(--layout-button-area-width)
  ); /* Adjust width to account for offset */
  height: var(--title-bar-height);
  background: var(--title-bar-bg);
  border-bottom: 1px solid var(--border-color);
  border-right: 1px solid var(--border-color);
  display: none;
  align-items: flex-end;
  justify-content: center;
  z-index: 9999;
  -webkit-app-region: drag;
  box-sizing: border-box;
  pointer-events: auto;
}

.sidebar-title {
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  font-weight: 500;
  color: var(--text-color);
  user-select: none;
  -webkit-user-select: none;
  cursor: default;
  height: 100%;
}

/* Show sidebar title only in horizontal layout with sidebar */
body.horizontal-layout.has-sidebar .sidebar-title-bar {
  display: flex;
}

/* Dividers */
.divider-vertical {
  position: absolute;
  top: var(--title-bar-height);
  bottom: 0;
  left: 400px;
  width: 5px;
  cursor: ew-resize;
  background-color: var(--border-color);
  visibility: hidden;
}

.divider-horizontal {
  position: absolute;
  left: 0;
  right: 0;
  top: calc(var(--title-bar-height) + 40px);
  height: 5px;
  cursor: ns-resize;
  background-color: var(--border-color);
  visibility: hidden;
}
