/* Base container layout */
.stream-container {
    max-width: 95vw;
    margin: 0 auto;
    padding: var(--spacing-base);
}

/* Message styling */
.stream-message {
    margin: var(--spacing-large) 0;
    padding: var(--spacing-base);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    background: var(--color-background);
}

/* Primary navigation with All Messages and current channel */
.primary-nav {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1rem;
}

.primary-nav .channel-link {
    padding: var(--spacing-small) var(--spacing-base);
    color: var(--color-text);
    text-decoration: none;
    border-bottom: 2px solid transparent;
    transition: border-color 0.2s ease;
}

.primary-nav .channel-link.active {
    border-bottom-color: var(--color-primary);
    color: var(--color-primary);
    font-weight: 500;
}

.primary-nav .channel-link:hover {
    border-bottom-color: var(--color-border);
}

/* Channel navigation structure */
.channel-navigation {
    margin: var(--spacing-large) 0;
    border-bottom: 1px solid var(--color-border);
}

/* Dropdown styles */
.channel-dropdown {
    position: relative;
    margin-left: auto;
}

.dropdown-toggle {
    padding: var(--spacing-small) var(--spacing-base);
    background-color: var(--color-background);
    color: var(--color-text);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: background-color 0.2s ease;
    display: flex;
    align-items: center;
}

.dropdown-toggle::after {
    content: "▼";
    font-size: 0.7em;
    margin-left: 0.5em;
}

.dropdown-toggle:hover {
    background-color: var(--color-annotation-bg);
}

.dropdown-menu {
    position: absolute;
    right: 0;
    top: 100%;
    width: 250px;
    max-height: 80vh;
    overflow-y: auto;
    background-color: var(--color-background);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    z-index: 1000;
    display: none;
    padding: var(--spacing-base);
}

.dropdown-menu.show {
    display: block;
}

.dropdown-group {
    margin-bottom: var(--spacing-base);
}

.dropdown-group:last-child {
    margin-bottom: 0;
}

.dropdown-group-heading {
    font-size: var(--font-size-small);
    color: var(--color-text-secondary);
    padding-bottom: 0.5rem;
    margin-bottom: 0.5rem;
    border-bottom: 1px solid var(--color-border);
}

.dropdown-item {
    display: block;
    padding: 0.5rem;
    text-decoration: none;
    color: var(--color-text);
    border-radius: var(--border-radius);
    transition: background-color 0.2s ease;
}

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

.dropdown-item.active {
    background-color: rgba(var(--color-primary-rgb), 0.1);
    color: var(--color-primary);
}

/* Chain view styling */
.chain-container {
    max-width: 95vw;
    margin: 0 auto;
    padding: var(--spacing-base);
}

.chain-message {
    margin: var(--spacing-large) 0;
    padding: var(--spacing-base);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    background: var(--color-background);
    position: relative;
}

.chain-message.target-message {
    border: 2px solid var(--color-primary);
    background: rgba(var(--color-primary-rgb), 0.05);
}

.message-connector {
    position: absolute;
    left: 50%;
    height: var(--spacing-large);
    border-left: 2px dashed var(--color-border);
    transform: translateX(-50%);
}

.connector-top {
    top: calc(-1 * var(--spacing-large));
}

.connector-bottom {
    bottom: calc(-1 * var(--spacing-large));
}

.chain-navigation {
    top: var(--spacing-base);
    z-index: 100;
    background: var(--background-color);
    padding: var(--spacing-base);
    border-radius: var(--border-radius);
    margin-bottom: var(--spacing-large);
}

.chain-overview {
    display: flex;
    gap: var(--spacing-base);
    align-items: center;
    justify-content: space-between;
}

.message-channel {
    font-size: var(--font-size-small);
    color: var(--color-text-secondary);
    padding: 0.2em 0.5em;
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
}

/* Theme-specific adjustments */
/* Dark theme */
[data-theme="dark"] .channel-link {
    color: var(--color-text);
}

[data-theme="dark"] .channel-link.active, 
[data-theme="dark"] .dropdown-item.active {
    color: var(--color-primary);
}

/* High contrast theme */
[data-theme="grayscale"] .stream-container {
    max-width: 95vw;
}

[data-theme="grayscale"] .message-header {
    border-bottom: 1px solid var(--color-text);
    padding-bottom: var(--spacing-base);
}

[data-theme="grayscale"] .message-sidebar {
    position: relative;
    max-height: none;
    border-left: 2px solid var(--color-text);
}

[data-theme="grayscale"] .channel-navigation {
    border-bottom: 2px solid var(--color-text);
}

[data-theme="grayscale"] .dropdown-group-heading {
    border-bottom: 2px solid var(--color-text);
}

[data-theme="grayscale"] .dropdown-toggle,
[data-theme="grayscale"] .dropdown-menu {
    border: 2px solid var(--color-text);
}

[data-theme="grayscale"] .message-channel {
    border: 2px solid currentColor;
}

/* Responsive design */
@media screen and (max-width: 1024px) {
    [data-theme="grayscale"] .stream-message {
        grid-template-columns: 1fr;
        gap: var(--spacing-base);
    }

    [data-theme="grayscale"] .message-sidebar {
        border-left: none;
        border-top: 2px solid var(--color-text);
        padding-top: var(--spacing-base);
    }
}

@media screen and (max-width: 768px) {
    .primary-nav {
        flex-wrap: wrap;
    }
    
    .channel-dropdown {
        margin-left: 0;
        margin-top: 0.5rem;
        width: 100%;
    }
    
    .dropdown-toggle {
        width: 100%;
        justify-content: space-between;
    }
    
    .dropdown-menu {
        width: 100%;
        max-width: 100%;
    }
    
    .channel-link {
        padding: var(--spacing-base);
    }

    .message-channel {
        align-self: flex-start;
    }
}