/**
 * item-page.css — the PAGE's styles (goes with item-page.js): the read-only view, the edit form,
 * Quill and the draw.io modal.
 *
 * Marius: *"The pages should anyway be seperate from the list structure."*
 * ⚠ It carries a global `.btn` / `.btn-primary` rule. That is safe only on a host that is built
 * around this page — a host with buttons of its own must not load this file.
 */

/* ===== Right Content Panel ===== */
.content-panel {
    flex: 1;
    overflow-y: auto;
    padding: var(--space-2xl);
    display: flex;
    flex-direction: column;
}

/* Placeholder State */
.content-placeholder {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    color: var(--text-muted);
}

.placeholder-icon {
    font-size: 64px;
    margin-bottom: var(--space-xl);
    opacity: 0.5;
}

.placeholder-title {
    font-size: var(--font-2xl);
    color: var(--text-secondary);
    margin-bottom: var(--space-sm);
}

.placeholder-hint {
    font-size: var(--font-md);
    color: var(--text-muted);
}

/* ===== Detail View ===== */
.detail-container {
    max-width: 900px;
}

.detail-header {
    margin-bottom: var(--space-2xl);
    padding-bottom: var(--space-lg);
    border-bottom: 1px solid var(--border-default);
}

.detail-title {
    font-size: var(--font-4xl);
    font-weight: 700;
    color: var(--text-inverse);
    line-height: 1.3;
}

.detail-ref-link {
    color: var(--accent-primary-text);
    text-decoration: none;
    font-weight: 400;
}

.detail-ref-link:hover {
    text-decoration: underline;
}

.detail-ref-text {
    color: var(--text-muted);
    font-weight: 400;
}

.detail-section {
    margin-bottom: var(--space-2xl);
    display: flex;
    justify-content: center;
}

/* Diagram Container */
.diagram-container {
    background: rgba(255, 255, 255, 0.95);
    padding: var(--space-lg);
    border-radius: var(--radius-md);
    border: 1px solid var(--border-default);
    width: fit-content;
    max-width: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* Text Content */
.detail-text {
    font-size: var(--font-2xl);
    line-height: 1.7;
    color: var(--text-primary);
}

.detail-text h1, .detail-text h2, .detail-text h3 {
    color: var(--text-inverse);
    margin-top: var(--space-2xl);
    margin-bottom: var(--space-lg);
}

.detail-text p {
    margin-bottom: var(--space-lg);
}

.detail-text ul, .detail-text ol {
    padding-left: var(--space-2xl);
    margin-bottom: var(--space-lg);
}

.detail-text a {
    color: var(--accent-primary-text);
}

/* ===== Edit Form ===== */
.item-edit-form {
    max-width: 800px;
    padding: 0;
}

.edit-form {
    max-width: 900px;
}

.edit-form-title {
    font-size: var(--font-3xl);
    color: var(--text-inverse);
    margin-bottom: var(--space-xl);
}

.form-row-compact {
    display: grid;
    grid-template-columns: 2fr 1fr 1.5fr;
    gap: 8px;
    margin-bottom: 12px;
}

.form-input-compact {
    width: 100%;
    padding: 6px 10px;
    border: 1px solid var(--border-default);
    border-radius: var(--radius-sm);
    font-size: 0.9rem;
    background: var(--bg-dark);
    color: var(--text-primary);
    transition: border-color 0.2s ease;
}

.form-input-compact:focus {
    outline: none;
    border-color: var(--accent-primary);
}

.form-input-compact::placeholder {
    color: var(--text-muted);
    font-size: 0.85rem;
}

.form-group-compact {
    margin-bottom: 12px;
}

.compact-control {
    display: flex;
    align-items: center;
    gap: 12px;
}

.btn-compact {
    padding: 6px 14px;
    font-size: 0.85rem;
    background: var(--bg-light);
    border: 1px solid var(--border-default);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    cursor: pointer;
    transition: all 0.2s ease;
    white-space: nowrap;
}

.btn-compact:hover {
    background: var(--bg-hover);
    border-color: var(--accent-primary);
}

.form-input {
    width: 100%;
    padding: var(--space-sm) var(--space-md);
    background: var(--bg-dark);
    border: 1px solid var(--border-default);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-size: var(--font-lg);
    transition: border-color var(--transition-base);
}

.form-input:focus {
    outline: none;
    border-color: var(--accent-primary);
}

.form-input::placeholder {
    color: var(--text-muted);
}

.form-group {
    margin-bottom: var(--space-xl);
}

.form-label {
    display: block;
    margin-bottom: var(--space-sm);
    font-size: var(--font-md);
    color: var(--text-secondary);
    font-weight: 500;
}

/* Diagram button */
.btn-diagram {
    padding: var(--space-sm) var(--space-xl);
    background: var(--bg-light);
    border: 1px solid var(--border-default);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-size: var(--font-lg);
    cursor: pointer;
    transition: all var(--transition-base);
}

.btn-diagram:hover {
    background: var(--bg-hover);
    border-color: var(--accent-primary);
}

/* Diagram preview in edit mode */
.diagram-preview-editable {
    position: relative;
    cursor: pointer;
    background: rgba(255, 255, 255, 0.95);
    padding: var(--space-lg);
    border-radius: var(--radius-md);
    border: 1px solid var(--border-default);
    width: fit-content;
    max-width: 100%;
}

.diagram-overlay {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: var(--font-lg);
    font-weight: 500;
    opacity: 0;
    transition: opacity var(--transition-base);
    border-radius: var(--radius-md);
}

.diagram-preview-editable:hover .diagram-overlay {
    opacity: 1;
}

/* Rich Text Editor */
.rich-text-editor {
    min-height: 200px;
    background: var(--bg-dark);
    border: 1px solid var(--border-default);
    border-radius: var(--radius-sm);
}

/* Quill overrides */
.ql-toolbar.ql-snow {
    background: var(--bg-medium);
    border-color: var(--border-default);
    border-radius: var(--radius-sm) var(--radius-sm) 0 0;
}

.ql-container.ql-snow {
    border-color: var(--border-default);
    border-radius: 0 0 var(--radius-sm) var(--radius-sm);
}

.ql-editor {
    min-height: 150px;
    color: var(--text-primary);
    font-size: var(--font-lg);
}

.ql-editor.ql-blank::before {
    color: var(--text-muted);
}

.ql-snow .ql-stroke {
    stroke: var(--text-secondary);
}

.ql-snow .ql-fill {
    fill: var(--text-secondary);
}

.ql-snow .ql-picker {
    color: var(--text-secondary);
}

/* Form Actions */
.form-actions {
    display: flex;
    gap: var(--space-md);
    margin-top: var(--space-2xl);
}

.btn,
.btn-primary,
.btn-save {
    padding: var(--space-sm) var(--space-2xl);
    background: var(--accent-primary);
    color: white;
    border: none;
    border-radius: var(--radius-sm);
    font-size: var(--font-lg);
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-base);
}

.btn:hover,
.btn-primary:hover,
.btn-save:hover {
    background: var(--accent-primary-hover);
}

.btn-secondary,
.btn-cancel {
    padding: var(--space-sm) var(--space-2xl);
    background: var(--bg-light);
    color: var(--text-primary);
    border: 1px solid var(--border-default);
    border-radius: var(--radius-sm);
    font-size: var(--font-lg);
    cursor: pointer;
    transition: all var(--transition-base);
}

.btn-secondary:hover,
.btn-cancel:hover {
    background: var(--bg-hover);
}

/* ===== Draw.io Modal ===== */
.drawio-modal {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.8);
    z-index: 10000;
    display: flex;
    align-items: center;
    justify-content: center;
}

.drawio-modal-content {
    width: 95%;
    height: 95%;
    background: white;
    border-radius: var(--radius-lg);
    overflow: hidden;
    position: relative;
}

.drawio-close-btn {
    position: absolute;
    top: 10px;
    right: 10px;
    z-index: 10;
    width: 36px;
    height: 36px;
    padding: 0;
    background: rgba(0, 0, 0, 0.7);
    color: white;
    border: none;
    border-radius: 50%;
    font-size: 24px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
}

.drawio-close-btn:hover {
    background: rgba(0, 0, 0, 0.9);
}

/* ===== Responsive ===== */
@media (max-width: 768px) {
    .form-row-compact {
        grid-template-columns: 1fr;
    }
}