/**
 * Layout styles
 * Grid, containers, responsive helpers
 */

/* App Container */
.app-container {
    display: flex;
    flex-direction: column;
    height: 100vh;
    width: 100vw;
    overflow: hidden;
}

/* Main Content */
.main-content {
    display: flex;
    flex: 1;
    overflow: hidden;
    position: relative;
}

/* Editor Container */
.editor-container {
    display: flex;
    flex-direction: column;
    flex: 1;
    overflow: hidden;
}

/* View Controls */
.view-controls {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-1) var(--space-2);
    background-color: var(--color-surface);
    border-bottom: 1px solid var(--color-outline-variant);
}

.view-controls__tabs {
    display: flex;
    gap: var(--space-1);
}

.view-tab {
    padding: var(--space-1) var(--space-2);
    border-radius: var(--radius-sm);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    color: var(--color-on-surface-variant);
    transition: all var(--transition-fast);
}

.view-tab:hover {
    background-color: var(--color-surface-variant);
}

.view-tab--active {
    background-color: var(--color-secondary-container);
    color: var(--color-on-secondary-container);
}

.view-controls__status {
    display: flex;
    gap: var(--space-1);
    font-size: var(--font-size-sm);
    color: var(--color-on-surface-variant);
}

.view-controls__status .divider {
    opacity: 0.5;
}

/* Split Pane */
.split-pane {
    display: flex;
    flex: 1;
    overflow: hidden;
    position: relative;
}

.split-pane[data-view="edit"] .pane--preview,
.split-pane[data-view="edit"] .resize-handle {
    display: none;
}

.split-pane[data-view="edit"] .pane--editor {
    width: 100%;
}

.split-pane[data-view="preview"] .pane--editor,
.split-pane[data-view="preview"] .resize-handle {
    display: none;
}

.split-pane[data-view="preview"] .pane--preview {
    width: 100%;
}

.pane {
    overflow: auto;
    height: 100%;
}

.pane--editor {
    width: 50%;
    background-color: var(--color-surface);
}

.pane--preview {
    width: 50%;
    background-color: var(--color-surface);
}

/* Resize Handle */
.resize-handle {
    width: 4px;
    background-color: var(--color-outline-variant);
    cursor: col-resize;
    transition: background-color var(--transition-fast);
    position: relative;
    z-index: var(--z-base);
}

.resize-handle:hover,
.resize-handle:active {
    background-color: var(--color-primary);
}

/* Loading Overlay */
.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.5);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    z-index: var(--z-overlay);
}

.loading-text {
    color: var(--color-on-primary);
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-medium);
}

/* Toast Container */
.toast-container {
    position: fixed;
    bottom: var(--space-3);
    right: var(--space-3);
    display: flex;
    flex-direction: column;
    gap: var(--space-1);
    z-index: var(--z-toast);
    max-width: 400px;
}

.toast {
    padding: var(--space-2);
    background-color: var(--color-surface);
    color: var(--color-on-surface);
    border-radius: var(--radius-md);
    box-shadow: var(--elevation-3);
    display: flex;
    align-items: center;
    gap: var(--space-2);
    animation: slideIn 0.3s ease-out;
}

@keyframes slideIn {
    from {
        transform: translateX(100%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

.toast--success {
    border-left: 4px solid #4caf50;
}

.toast--error {
    border-left: 4px solid var(--color-error);
}

.toast--info {
    border-left: 4px solid var(--color-primary);
}

.toast__message {
    flex: 1;
}

.toast__close {
    padding: var(--space-1);
    opacity: 0.7;
}

.toast__close:hover {
    opacity: 1;
}

/* Form Groups */
.form-group {
    display: flex;
    flex-direction: column;
    gap: var(--space-1);
    margin-bottom: var(--space-2);
}

.form-group label {
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    color: var(--color-on-surface-variant);
}

.form-select,
.form-textarea {
    padding: var(--space-1) var(--space-2);
    background-color: var(--color-surface-variant);
    border: 1px solid var(--color-outline-variant);
    border-radius: var(--radius-sm);
    color: var(--color-on-surface);
    transition: border-color var(--transition-fast);
}

.form-select:focus,
.form-textarea:focus {
    outline: none;
    border-color: var(--color-primary);
}

.form-textarea {
    resize: vertical;
    font-family: var(--font-family);
}

/* Responsive */
@media (max-width: 768px) {
    .split-pane[data-view="split"] {
        flex-direction: column;
    }

    .split-pane[data-view="split"] .pane--editor,
    .split-pane[data-view="split"] .pane--preview {
        width: 100%;
        height: 50%;
    }

    .resize-handle {
        width: 100%;
        height: 4px;
        cursor: row-resize;
    }

    .view-controls__status {
        display: none;
    }
}