/* ============================================================
   SD-DETAILVIEW — View / Edit / Audit Component
   BEM: sd-detailview, sd-detailview__{element}, sd-detailview--{modifier}
   Depends on: tokens.css, formengine.css, button.css
   ============================================================ */

/* ============================================================
   BASE CONTAINER
   ============================================================ */
.sd-detailview {
    position: relative;
    background: var(--bg-surface, #ffffff);
    border: 1px solid var(--border-default, #e2e8f0);
    border-radius: var(--radius-md, 8px);
    overflow: hidden;
    font-family: var(--font-sans, 'Inter', 'Segoe UI', -apple-system, BlinkMacSystemFont, sans-serif);
    font-size: var(--text-sm, 0.875rem);
    line-height: var(--leading-normal, 1.5);
    color: var(--text-primary, #0f172a);
}

/* ============================================================
   HEADER — contains title + mode tabs + actions
   ============================================================ */
.sd-detailview__header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-4, 1rem) var(--space-5, 1.25rem);
    border-bottom: 1px solid var(--border-default, #e2e8f0);
    background: var(--bg-muted, #f8fafc);
    flex-wrap: wrap;
    gap: var(--space-3, 0.75rem);
}

.sd-detailview__header-left {
    display: flex;
    align-items: center;
    gap: var(--space-3, 0.75rem);
    min-width: 0;
}

.sd-detailview__header-right {
    display: flex;
    align-items: center;
    gap: var(--space-2, 0.5rem);
    flex-shrink: 0;
}

.sd-detailview__title {
    font-size: var(--text-lg, 1.125rem);
    font-weight: var(--font-semibold, 600);
    color: var(--text-primary, #0f172a);
    margin: 0;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.sd-detailview__subtitle {
    font-size: var(--text-xs, 0.75rem);
    color: var(--text-muted, #94a3b8);
    margin: 0;
}

/* ============================================================
   MODE TABS
   ============================================================ */
.sd-detailview__tabs {
    display: flex;
    align-items: center;
    gap: var(--space-1, 0.25rem);
    background: var(--bg-base, #ffffff);
    border: 1px solid var(--border-default, #e2e8f0);
    border-radius: var(--radius-sm, 6px);
    padding: var(--space-0\.5, 0.125rem);
}

.sd-detailview__tab {
    display: inline-flex;
    align-items: center;
    gap: var(--space-1\.5, 0.375rem);
    padding: var(--space-1\.5, 0.375rem) var(--space-3, 0.75rem);
    border: none;
    border-radius: var(--radius-xs, 4px);
    background: transparent;
    color: var(--text-secondary, #475569);
    font-family: inherit;
    font-size: var(--text-xs, 0.75rem);
    font-weight: var(--font-medium, 500);
    cursor: pointer;
    transition:
        background var(--duration-fast, 0.1s) var(--ease, cubic-bezier(0.4, 0, 0.2, 1)),
        color var(--duration-fast, 0.1s) var(--ease, cubic-bezier(0.4, 0, 0.2, 1));
    white-space: nowrap;
}

.sd-detailview__tab:hover {
    background: var(--bg-surface-hover, #f5f5f5);
    color: var(--text-primary, #0f172a);
}

.sd-detailview__tab--active {
    background: var(--color-primary, #2563eb);
    color: var(--text-inverse, #ffffff);
    box-shadow: var(--shadow-xs, 0 1px 2px rgba(0, 0, 0, 0.04));
}

.sd-detailview__tab--active:hover {
    background: var(--color-primary-hover, #1d4ed8);
    color: var(--text-inverse, #ffffff);
}

.sd-detailview__tab-icon {
    display: inline-flex;
    width: 14px;
    height: 14px;
    flex-shrink: 0;
}

.sd-detailview__tab-badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 18px;
    height: 18px;
    padding: 0 var(--space-1, 0.25rem);
    border-radius: var(--radius-full, 9999px);
    background: var(--color-danger, #ef4444);
    color: var(--text-inverse, #ffffff);
    font-size: 0.625rem;
    font-weight: var(--font-semibold, 600);
    line-height: 1;
}

.sd-detailview__tab--active .sd-detailview__tab-badge {
    background: rgba(255, 255, 255, 0.25);
}

/* ============================================================
   BODY — content area that switches per mode
   ============================================================ */
.sd-detailview__body {
    min-height: 200px;
}

/* ============================================================
   VIEW MODE
   ============================================================ */
.sd-detailview__view {
    padding: var(--space-5, 1.25rem);
}

.sd-detailview__view-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-4, 1rem) var(--space-6, 1.5rem);
}

.sd-detailview__view-grid--single {
    grid-template-columns: 1fr;
}

.sd-detailview__view-group {
    display: flex;
    flex-direction: column;
    gap: var(--space-1, 0.25rem);
    min-width: 0;
    padding: var(--space-2, 0.5rem) var(--space-3, 0.75rem);
    margin: 0 calc(-1 * var(--space-3, 0.75rem));
    border-left: 2px solid var(--border-subtle, #f1f5f9);
    border-radius: var(--radius-xs, 4px);
    transition: background var(--duration-fast, 0.1s) var(--ease, cubic-bezier(0.4, 0, 0.2, 1));
}

/* Faint hover so each field reads as a distinct, scannable row */
.sd-detailview__view-group:hover {
    background: var(--bg-subtle, #f1f5f9);
}

.sd-detailview__view-group--full {
    grid-column: 1 / -1;
}

.sd-detailview__view-label {
    font-size: var(--text-xs, 0.75rem);
    font-weight: var(--font-medium, 500);
    color: var(--text-muted, #94a3b8);
    text-transform: uppercase;
    letter-spacing: var(--tracking-wide, 0.025em);
    line-height: var(--leading-tight, 1.25);
}

.sd-detailview__view-value {
    font-size: var(--text-sm, 0.875rem);
    font-weight: var(--font-normal, 400);
    color: var(--text-primary, #0f172a);
    word-break: break-word;
    line-height: var(--leading-normal, 1.5);
    min-height: 1.5em;
}

.sd-detailview__view-value--empty {
    color: var(--text-muted, #94a3b8);
    font-style: italic;
}

.sd-detailview__view-value--mono {
    font-family: var(--font-mono, 'JetBrains Mono', 'Fira Code', monospace);
    font-size: var(--text-xs, 0.75rem);
}

/* View mode sections */
.sd-detailview__view-section {
    margin-bottom: var(--space-5, 1.25rem);
    padding-bottom: var(--space-5, 1.25rem);
    border-bottom: 1px solid var(--border-subtle, #f1f5f9);
}

.sd-detailview__view-section:last-child {
    margin-bottom: 0;
    padding-bottom: 0;
    border-bottom: none;
}

.sd-detailview__view-section-title {
    font-size: var(--text-sm, 0.875rem);
    font-weight: var(--font-semibold, 600);
    color: var(--text-primary, #0f172a);
    margin: 0 0 var(--space-3, 0.75rem) 0;
    padding-bottom: var(--space-2, 0.5rem);
    border-bottom: 1px solid var(--border-subtle, #f1f5f9);
}

/* ============================================================
   EDIT MODE
   ============================================================ */
.sd-detailview__edit {
    padding: var(--space-5, 1.25rem);
}

.sd-detailview__edit .sd-form-engine__form {
    width: 100%;
}

/* Edit mode action bar */
.sd-detailview__edit-actions {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: var(--space-2, 0.5rem);
    padding: var(--space-4, 1rem) var(--space-5, 1.25rem);
    border-top: 1px solid var(--border-default, #e2e8f0);
    background: var(--bg-muted, #f8fafc);
}

.sd-detailview__edit-actions--sticky {
    position: sticky;
    bottom: 0;
    z-index: var(--z-sticky, 1020);
    box-shadow: 0 -2px 4px rgba(0, 0, 0, 0.04);
}

/* Unsaved changes indicator */
.sd-detailview__dirty-indicator {
    display: inline-flex;
    align-items: center;
    gap: var(--space-1\.5, 0.375rem);
    font-size: var(--text-xs, 0.75rem);
    color: var(--color-warning, #f59e0b);
    font-weight: var(--font-medium, 500);
    margin-right: auto;
}

.sd-detailview__dirty-dot {
    width: 6px;
    height: 6px;
    border-radius: var(--radius-full, 9999px);
    background: var(--color-warning, #f59e0b);
    animation: sd-detailview-pulse 1.5s ease-in-out infinite;
}

@keyframes sd-detailview-pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.4; }
}

/* ============================================================
   AUDIT MODE
   ============================================================ */
.sd-detailview__audit {
    padding: var(--space-5, 1.25rem);
}

/* Audit controls */
.sd-detailview__audit-controls {
    display: flex;
    align-items: center;
    gap: var(--space-3, 0.75rem);
    margin-bottom: var(--space-5, 1.25rem);
    padding-bottom: var(--space-4, 1rem);
    border-bottom: 1px solid var(--border-subtle, #f1f5f9);
    flex-wrap: wrap;
}

.sd-detailview__audit-filter {
    display: flex;
    align-items: center;
    gap: var(--space-2, 0.5rem);
}

.sd-detailview__audit-filter-label {
    font-size: var(--text-xs, 0.75rem);
    font-weight: var(--font-medium, 500);
    color: var(--text-secondary, #475569);
    white-space: nowrap;
}

.sd-detailview__audit-filter-select {
    padding: var(--space-1, 0.25rem) var(--space-2\.5, 0.625rem);
    border: 1px solid var(--border-default, #e2e8f0);
    border-radius: var(--radius-sm, 6px);
    background: var(--bg-surface, #ffffff);
    color: var(--text-primary, #0f172a);
    font-family: inherit;
    font-size: var(--text-xs, 0.75rem);
    cursor: pointer;
    transition: border-color var(--duration-fast, 0.1s) var(--ease, cubic-bezier(0.4, 0, 0.2, 1));
}

.sd-detailview__audit-filter-select:focus {
    outline: none;
    border-color: var(--color-primary, #2563eb);
    box-shadow: 0 0 0 3px var(--color-primary-light, rgba(37, 99, 235, 0.08));
}

/* Timeline */
.sd-detailview__timeline {
    position: relative;
    padding-left: var(--space-6, 1.5rem);
}

.sd-detailview__timeline::before {
    content: '';
    position: absolute;
    top: 0;
    left: 11px;
    bottom: 0;
    width: 2px;
    background: var(--border-default, #e2e8f0);
}

/* Timeline entry */
.sd-detailview__timeline-entry {
    position: relative;
    padding-bottom: var(--space-5, 1.25rem);
}

.sd-detailview__timeline-entry:last-child {
    padding-bottom: 0;
}

.sd-detailview__timeline-dot {
    position: absolute;
    left: calc(-1 * var(--space-6, 1.5rem) + 6px);
    top: 2px;
    width: 12px;
    height: 12px;
    border-radius: var(--radius-full, 9999px);
    background: var(--bg-surface, #ffffff);
    border: 2px solid var(--border-strong, #cbd5e1);
    z-index: 1;
}

.sd-detailview__timeline-dot--create {
    border-color: var(--color-success, #10b981);
    background: var(--color-success, #10b981);
}

.sd-detailview__timeline-dot--update {
    border-color: var(--color-info, #3b82f6);
    background: var(--color-info, #3b82f6);
}

.sd-detailview__timeline-dot--delete {
    border-color: var(--color-danger, #ef4444);
    background: var(--color-danger, #ef4444);
}

/* Timeline header */
.sd-detailview__timeline-header {
    display: flex;
    align-items: center;
    gap: var(--space-2, 0.5rem);
    margin-bottom: var(--space-2, 0.5rem);
    flex-wrap: wrap;
}

.sd-detailview__timeline-action {
    font-size: var(--text-sm, 0.875rem);
    font-weight: var(--font-semibold, 600);
    color: var(--text-primary, #0f172a);
}

.sd-detailview__timeline-action--create {
    color: var(--color-success, #10b981);
}

.sd-detailview__timeline-action--update {
    color: var(--color-info, #3b82f6);
}

.sd-detailview__timeline-action--delete {
    color: var(--color-danger, #ef4444);
}

.sd-detailview__timeline-user {
    font-size: var(--text-xs, 0.75rem);
    font-weight: var(--font-medium, 500);
    color: var(--text-secondary, #475569);
}

.sd-detailview__timeline-time {
    font-size: var(--text-xs, 0.75rem);
    color: var(--text-muted, #94a3b8);
    margin-left: auto;
}

/* Timeline diff */
.sd-detailview__timeline-diff {
    background: var(--bg-muted, #f8fafc);
    border: 1px solid var(--border-subtle, #f1f5f9);
    border-radius: var(--radius-sm, 6px);
    overflow: hidden;
}

.sd-detailview__diff-row {
    display: flex;
    align-items: flex-start;
    padding: var(--space-2, 0.5rem) var(--space-3, 0.75rem);
    border-bottom: 1px solid var(--border-subtle, #f1f5f9);
    gap: var(--space-3, 0.75rem);
}

.sd-detailview__diff-row:last-child {
    border-bottom: none;
}

.sd-detailview__diff-field {
    flex: 0 0 120px;
    font-size: var(--text-xs, 0.75rem);
    font-weight: var(--font-medium, 500);
    color: var(--text-secondary, #475569);
    padding-top: 2px;
    word-break: break-word;
}

.sd-detailview__diff-values {
    flex: 1;
    display: flex;
    align-items: flex-start;
    gap: var(--space-2, 0.5rem);
    min-width: 0;
}

.sd-detailview__diff-old {
    flex: 1;
    font-size: var(--text-xs, 0.75rem);
    color: var(--color-danger, #ef4444);
    background: var(--color-danger-light, rgba(239, 68, 68, 0.08));
    padding: var(--space-1, 0.25rem) var(--space-2, 0.5rem);
    border-radius: var(--radius-xs, 4px);
    word-break: break-word;
    text-decoration: line-through;
    opacity: 0.8;
}

.sd-detailview__diff-new {
    flex: 1;
    font-size: var(--text-xs, 0.75rem);
    color: var(--color-success, #10b981);
    background: var(--color-success-light, rgba(16, 185, 129, 0.08));
    padding: var(--space-1, 0.25rem) var(--space-2, 0.5rem);
    border-radius: var(--radius-xs, 4px);
    word-break: break-word;
}

.sd-detailview__diff-arrow {
    flex-shrink: 0;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 16px;
    color: var(--text-muted, #94a3b8);
}

/* Audit empty state */
.sd-detailview__audit-empty {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--space-12, 3rem) var(--space-4, 1rem);
    text-align: center;
    color: var(--text-muted, #94a3b8);
}

.sd-detailview__audit-empty-icon {
    margin-bottom: var(--space-3, 0.75rem);
    opacity: 0.5;
}

.sd-detailview__audit-empty-title {
    font-size: var(--text-sm, 0.875rem);
    font-weight: var(--font-semibold, 600);
    color: var(--text-secondary, #475569);
    margin-bottom: var(--space-1, 0.25rem);
}

.sd-detailview__audit-empty-text {
    font-size: var(--text-xs, 0.75rem);
}

/* ============================================================
   LOADING OVERLAY
   ============================================================ */
.sd-detailview__loading {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 255, 255, 0.85);
    z-index: var(--z-fixed, 1030);
}

.sd-detailview__loading-spinner {
    width: 28px;
    height: 28px;
    border: 3px solid var(--border-default, #e2e8f0);
    border-top-color: var(--color-primary, #2563eb);
    border-radius: var(--radius-full, 9999px);
    animation: sd-detailview-spin 0.6s linear infinite;
}

@keyframes sd-detailview-spin {
    to { transform: rotate(360deg); }
}

.sd-detailview--loading {
    pointer-events: none;
}

.sd-detailview--loading > *:not(.sd-detailview__loading) {
    opacity: 0.5;
}

/* ============================================================
   KEYBOARD SHORTCUT HINT
   ============================================================ */
.sd-detailview__shortcut-hint {
    display: inline-flex;
    align-items: center;
    gap: var(--space-1, 0.25rem);
    font-size: var(--text-xs, 0.75rem);
    color: var(--text-muted, #94a3b8);
}

.sd-detailview__kbd {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 20px;
    height: 18px;
    padding: 0 var(--space-1, 0.25rem);
    border: 1px solid var(--border-default, #e2e8f0);
    border-radius: var(--radius-xs, 4px);
    background: var(--bg-muted, #f8fafc);
    font-family: var(--font-mono, 'JetBrains Mono', monospace);
    font-size: 0.625rem;
    font-weight: var(--font-medium, 500);
    color: var(--text-secondary, #475569);
    line-height: 1;
}

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 768px) {
    .sd-detailview__header {
        flex-direction: column;
        align-items: stretch;
    }

    .sd-detailview__header-left,
    .sd-detailview__header-right {
        width: 100%;
    }

    .sd-detailview__header-right {
        justify-content: flex-end;
    }

    .sd-detailview__tabs {
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
    }

    .sd-detailview__view-grid {
        grid-template-columns: 1fr;
    }

    .sd-detailview__edit-actions {
        flex-wrap: wrap;
    }

    .sd-detailview__timeline {
        padding-left: var(--space-5, 1.25rem);
    }

    .sd-detailview__timeline::before {
        left: 9px;
    }

    .sd-detailview__timeline-dot {
        left: calc(-1 * var(--space-5, 1.25rem) + 4px);
        width: 10px;
        height: 10px;
    }

    .sd-detailview__diff-field {
        flex: 0 0 80px;
    }

    .sd-detailview__diff-values {
        flex-direction: column;
    }

    .sd-detailview__timeline-header {
        flex-direction: column;
        align-items: flex-start;
    }

    .sd-detailview__timeline-time {
        margin-left: 0;
    }
}

@media (max-width: 480px) {
    .sd-detailview__header {
        padding: var(--space-3, 0.75rem) var(--space-4, 1rem);
    }

    .sd-detailview__title {
        font-size: var(--text-base, 1rem);
    }

    .sd-detailview__view,
    .sd-detailview__edit,
    .sd-detailview__audit {
        padding: var(--space-4, 1rem);
    }

    .sd-detailview__tab {
        padding: var(--space-1, 0.25rem) var(--space-2, 0.5rem);
        font-size: 0.6875rem;
    }
}

/* ============================================================
   DARK MODE
   ============================================================ */
[data-theme="dark"] .sd-detailview {
    background: var(--bg-surface, #161822);
    border-color: var(--border-default, #2e3348);
}

[data-theme="dark"] .sd-detailview__header {
    background: var(--bg-muted, #1a1d2e);
    border-bottom-color: var(--border-default, #2e3348);
}

[data-theme="dark"] .sd-detailview__title {
    color: var(--text-primary, #e2e8f0);
}

[data-theme="dark"] .sd-detailview__tabs {
    background: var(--bg-surface, #161822);
    border-color: var(--border-default, #2e3348);
}

[data-theme="dark"] .sd-detailview__tab {
    color: var(--text-secondary, #94a3b8);
}

[data-theme="dark"] .sd-detailview__tab:hover {
    background: var(--bg-surface-hover, #1e2030);
    color: var(--text-primary, #e2e8f0);
}

[data-theme="dark"] .sd-detailview__tab--active {
    background: var(--color-primary, #3b82f6);
    color: var(--text-inverse, #ffffff);
}

[data-theme="dark"] .sd-detailview__view-section {
    border-bottom-color: var(--border-subtle, #252838);
}

[data-theme="dark"] .sd-detailview__view-group {
    border-left-color: var(--border-subtle, #252838);
}

[data-theme="dark"] .sd-detailview__view-group:hover {
    background: var(--bg-subtle, #252838);
}

[data-theme="dark"] .sd-detailview__view-section-title {
    color: var(--text-primary, #e2e8f0);
    border-bottom-color: var(--border-subtle, #252838);
}

[data-theme="dark"] .sd-detailview__edit-actions {
    background: var(--bg-muted, #1a1d2e);
    border-top-color: var(--border-default, #2e3348);
}

[data-theme="dark"] .sd-detailview__audit-controls {
    border-bottom-color: var(--border-subtle, #252838);
}

[data-theme="dark"] .sd-detailview__audit-filter-select {
    background: var(--bg-surface, #161822);
    border-color: var(--border-default, #2e3348);
    color: var(--text-primary, #e2e8f0);
}

[data-theme="dark"] .sd-detailview__timeline::before {
    background: var(--border-default, #2e3348);
}

[data-theme="dark"] .sd-detailview__timeline-dot {
    background: var(--bg-surface, #161822);
    border-color: var(--border-strong, #475569);
}

[data-theme="dark"] .sd-detailview__timeline-diff {
    background: var(--bg-muted, #1a1d2e);
    border-color: var(--border-subtle, #252838);
}

[data-theme="dark"] .sd-detailview__diff-row {
    border-bottom-color: var(--border-subtle, #252838);
}

[data-theme="dark"] .sd-detailview__diff-old {
    background: rgba(248, 113, 113, 0.12);
    color: var(--color-danger, #f87171);
}

[data-theme="dark"] .sd-detailview__diff-new {
    background: rgba(52, 211, 153, 0.12);
    color: var(--color-success, #34d399);
}

[data-theme="dark"] .sd-detailview__kbd {
    background: var(--bg-surface, #161822);
    border-color: var(--border-default, #2e3348);
    color: var(--text-secondary, #94a3b8);
}

[data-theme="dark"] .sd-detailview__loading {
    background: rgba(15, 17, 23, 0.85);
}

[data-theme="dark"] .sd-detailview__loading-spinner {
    border-color: var(--border-default, #2e3348);
    border-top-color: var(--color-primary, #3b82f6);
}

[data-theme="dark"] .sd-detailview__dirty-dot {
    background: var(--color-warning, #fbbf24);
}