.app-container {
    display: grid;
    grid-template-columns: 1fr auto var(--sidebar-width, 450px);
    width: 100vw;
    height: 100vh;
    overflow: hidden;
    background: #121212;
}


.reader-pane {
    background: #F9F9F9;
    position: relative;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    z-index: 5;
    height: 100vh;
}

main {
    flex: 1;
    overflow: hidden;
    position: relative;
    display: flex;
    flex-direction: column;
}

.intelligence-sidebar {
    display: grid;
    grid-template-columns: 50px 1fr;
    width: 100%; /* controlled by grid */
    height: 100%;
    background: #0d0d0d;
    box-shadow: -10px 0 30px rgba(0, 0, 0, 0.3);
    border-left: 1px solid rgba(255, 255, 255, 0.05);
    overflow: hidden;
    z-index: 10;
}

.resizer {
    width: 4px;
    cursor: col-resize;
    background: rgba(255, 255, 255, 0.02);
    transition: background 0.2s, width 0.2s;
    z-index: 20;
    border-left: 1px solid rgba(255, 255, 255, 0.05);
}

.resizer:hover, .app-container.is-resizing .resizer {
    background: var(--nexus-neon);
    width: 6px;
    box-shadow: 0 0 10px var(--nexus-neon);
}

.app-container.is-resizing {
    user-select: none;
}


.app-container.focus-mode-active {
    grid-template-columns: 1fr 0px 50px;
}

.app-container.focus-mode-active .intelligence-sidebar {
    grid-template-columns: 50px 0px;
}

.app-container.focus-mode-active .resizer {
    display: none;
}

.app-container.focus-mode-active .intelligence-content {
    opacity: 0;
    pointer-events: none;
}



.intelligence-content {
    display: flex;
    flex-direction: column;
    height: 100%;
    overflow: hidden;
}

.intelligence-header {
    height: 50px;
    display: flex;
    align-items: center;
    padding: 0 1.5rem;
    gap: 0.8rem;
    background: rgba(255, 255, 255, 0.02);
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    font-family: var(--nexus-font-sans);
    font-size: 0.9rem;
    color: #fff;
    flex-shrink: 0;
}

.intelligence-header .close-btn {
    margin-left: auto;
    background: none;
    border: none;
    color: #666;
    font-size: 1.5rem;
    cursor: pointer;
}

.intelligence-scroll-area {
    flex: 1;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
}

/* Platform Specifics */
.platform-mobile .intelligence-sidebar {
    position: fixed;
    right: 0;
    top: 0;
    bottom: 0;
    width: 80%;
    z-index: 100;
}

#blazor-error-ui {
    background: lightyellow;
    bottom: 0;
    box-shadow: 0 -1px 2px rgba(0, 0, 0, 0.2);
    display: none;
    left: 0;
    padding: 0.6rem 1.25rem 0.7rem 1.25rem;
    position: fixed;
    width: 100%;
    z-index: 1000;
}

#blazor-error-ui .dismiss {
    cursor: pointer;
    position: absolute;
    right: 0.75rem;
    top: 0.5rem;
}

.quiz-available {
    animation: quiz-pulse 1.5s infinite;
    color: var(--nexus-neon) !important;
}

@keyframes quiz-pulse {
    0% { filter: drop-shadow(0 0 2px var(--nexus-neon)); transform: scale(1); }
    50% { filter: drop-shadow(0 0 10px var(--nexus-neon)); transform: scale(1.1); }
    100% { filter: drop-shadow(0 0 2px var(--nexus-neon)); transform: scale(1); }
}