:root {
  --bg-color: #f3f2f1;
  --sidebar-bg: #f3f2f1;
  --list-bg: #ffffff;
  --border-color: #edebe9;
  --primary-color: #0f6cbd;
  --text-main: #242424;
  --text-muted: #605e5c;
  --hover-bg: #f3f2f1;
  --selected-bg: #e1dfdd;
  --danger-color: #d13438;
  --success-color: #107c10;
}

body {
  margin: 0;
  padding: 0;
  font-family: 'Segoe UI', -apple-system, BlinkMacSystemFont, Roboto, Helvetica, Arial, sans-serif;
  color: var(--text-main);
  background-color: var(--bg-color);
  height: 100vh;
  display: flex;
  overflow: hidden;
}

/* Three pane layout */
#app {
  display: flex;
  width: 100vw;
  height: 100vh;
}

/* Sidebar */
.sidebar {
  width: 250px;
  background-color: var(--sidebar-bg);
  border-right: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
}

.sidebar-header {
  padding: 16px;
  font-weight: 600;
  font-size: 1.1rem;
}

.folder-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.folder-item {
  padding: 10px 16px;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 10px;
}

.folder-item:hover {
  background-color: var(--hover-bg);
}

.folder-item.active {
  background-color: var(--selected-bg);
  font-weight: 600;
}

/* Email List */
.email-list {
  width: 350px;
  background-color: var(--list-bg);
  border-right: 1px solid var(--border-color);
  overflow-y: auto;
}

.email-list-header {
  padding: 16px;
  border-bottom: 1px solid var(--border-color);
  font-weight: 600;
  font-size: 1.2rem;
  background: white;
  position: sticky;
  top: 0;
}

.email-item {
  padding: 12px 16px;
  border-bottom: 1px solid var(--border-color);
  cursor: pointer;
}

.email-item:hover {
  background-color: var(--hover-bg);
}

.email-item.active {
  background-color: #e8f4fd;
  border-left: 3px solid var(--primary-color);
}

.email-sender {
  font-weight: 600;
  font-size: 0.95rem;
  margin-bottom: 4px;
}

.email-subject {
  font-size: 0.9rem;
  color: var(--primary-color);
  margin-bottom: 4px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.email-preview {
  font-size: 0.85rem;
  color: var(--text-muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* Email Viewing Pane */
.email-view {
  flex: 1;
  background-color: #ffffff;
  display: flex;
  flex-direction: column;
  overflow-y: auto;
}

.email-view-header {
  padding: 24px 32px;
  border-bottom: 1px solid var(--border-color);
}

.email-view-subject {
  font-size: 1.5rem;
  font-weight: 600;
  margin-bottom: 16px;
}

.email-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.sender-info {
  display: flex;
  flex-direction: column;
}

.sender-name {
  font-weight: 600;
}

.sender-email {
  color: var(--text-muted);
  font-size: 0.9rem;
}

/* Quiz Overlay / Actions */
.quiz-actions {
  display: flex;
  gap: 12px;
  padding: 16px 32px;
  background-color: #fbfbfb;
  border-bottom: 1px solid var(--border-color);
  align-items: center;
}

.quiz-instruction {
  font-weight: 600;
  margin-right: auto;
  color: var(--text-main);
}

.btn {
  padding: 8px 16px;
  border: none;
  border-radius: 4px;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.2s;
}

.btn-phishing {
  background-color: var(--danger-color);
  color: white;
}
.btn-phishing:hover { background-color: #a82a2d; }

.btn-safe {
  background-color: var(--success-color);
  color: white;
}
.btn-safe:hover { background-color: #0b5e0b; }

.email-body {
  padding: 32px;
  font-size: 1rem;
  line-height: 1.5;
}

/* Visual Cues (Applied programmatically based on group) */
.visual-cue-domain {
  background-color: #fff4ce;
  border: 1px solid #d8a000;
  padding: 2px 4px;
  border-radius: 4px;
  font-weight: bold;
}
.visual-cue-banner {
  background-color: #fde7e9;
  border-left: 4px solid var(--danger-color);
  padding: 12px;
  margin-bottom: 16px;
  color: var(--danger-color);
  font-weight: 600;
}

/* Setup Overlay */
#setup-screen {
  position: fixed;
  top: 0; left: 0; width: 100vw; height: 100vh;
  background: rgba(0,0,0,0.8);
  display: flex;
  justify-content: center;
  align-items: center;
  color: white;
  z-index: 100;
}
.setup-box {
  background: white;
  color: black;
  padding: 40px;
  border-radius: 8px;
  text-align: center;
  max-width: 500px;
}
.setup-box button {
  margin-top: 20px;
  padding: 10px 20px;
  font-size: 1.1rem;
  background: var(--primary-color);
  color: white;
  border: none;
  border-radius: 4px;
  cursor: pointer;
}