/* ============================================================
   BUILDER.CSS — Dark theme system for Email Builder
   This file is loaded BEFORE the inline styles in email-builder.html
   which override and extend these base rules.
   ============================================================ */

:root {
    /* Keep legacy vars for section JS modules that may reference them */
    --primary:        #5b7cfa;
    --primary-dark:   #4a68e8;
    --dark:           #e2e8f0;
    --light:          #1a1d27;
    --gray:           #94a3b8;
    --success:        #10b981;

    /* Builder dark palette */
    --b-bg:           #0f1117;
    --b-surface:      #1a1d27;
    --b-surface2:     #222638;
    --b-surface3:     #2a2f45;
    --b-border:       #2e3348;
    --b-border2:      #3d4460;
    --b-accent:       #5b7cfa;
    --b-purple:       #8b5cf6;
    --b-green:        #10b981;
    --b-red:          #ef4444;
    --b-text:         #e2e8f0;
    --b-text2:        #94a3b8;
    --b-text3:        #64748b;
}

*, *::before, *::after {
    box-sizing: border-box;
}

body {
    background-color: var(--b-bg);
    color: var(--b-text);
    line-height: 1.5;
    font-family: 'Inter', 'Segoe UI', system-ui, sans-serif;
}

/* ── SECTION / CONTAINER LIST ITEMS ── */
.section-item, .container-item {
    cursor: pointer;
    transition: all 0.15s ease;
    border-left: 3px solid transparent;
    position: relative;
    user-select: none;
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: var(--b-surface2);
    border: 1px solid var(--b-border);
    border-radius: 6px;
    padding: 8px 10px;
    margin-bottom: 3px;
    color: var(--b-text);
}

.section-item:hover, .container-item:hover {
    background: var(--b-surface3);
    border-color: var(--b-border2);
    border-left-color: var(--b-accent);
}

.section-item.active, .container-item.active {
    background: rgba(91, 124, 250, 0.1);
    border-left-color: var(--b-accent);
    border-color: rgba(91, 124, 250, 0.3);
}

.container-item {
    background: rgba(139, 92, 246, 0.07);
    border-left-color: rgba(139, 92, 246, 0.4);
    flex-direction: column;
    align-items: flex-start;
}

.container-item:hover {
    border-left-color: var(--b-purple);
}

.container-item.active {
    background: rgba(139, 92, 246, 0.15);
    border-left-color: var(--b-purple);
    border-color: rgba(139, 92, 246, 0.35);
}

.container-nested {
    margin-left: 14px;
    border-left: 2px dashed rgba(100, 116, 139, 0.3);
    padding-left: 8px;
}

/* ── DRAG HANDLE ── */
.draggable-handle {
    cursor: grab;
    opacity: 0.5;
    transition: opacity 0.2s;
    padding: 2px 6px;
    border-radius: 4px;
    color: var(--b-text3);
    font-size: 0.75rem;
}

.draggable-handle:active { cursor: grabbing; }

.section-item:hover .draggable-handle,
.container-item:hover .draggable-handle {
    opacity: 1;
    color: var(--b-text2);
}

/* ── DRAG STATES ── */
.section-item.dragging, .container-item.dragging {
    opacity: 0.35;
    background: rgba(91, 124, 250, 0.05);
    border: 2px dashed var(--b-accent);
}

.drag-over-top {
    border-top: 2px solid var(--b-accent) !important;
    padding-top: 6px;
}

.drag-over-bottom {
    border-bottom: 2px solid var(--b-accent) !important;
    padding-bottom: 6px;
}

.drag-over-inside {
    background: rgba(91, 124, 250, 0.15) !important;
    border: 2px solid var(--b-accent) !important;
}

/* ── DRAG FEEDBACK LABEL ── */
.drag-feedback {
    position: fixed;
    background: var(--b-accent);
    color: white;
    padding: 6px 14px;
    border-radius: 20px;
    font-size: 0.78rem;
    font-weight: 500;
    pointer-events: none;
    z-index: 9999;
    box-shadow: 0 4px 20px rgba(91, 124, 250, 0.4);
    display: none;
    max-width: 280px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    letter-spacing: 0.02em;
}

/* ── PREVIEW FRAME ── */
#preview-frame {
    width: 100%;
    min-height: 500px;
    border: none;
    background: #ffffff;
    display: block;
    border-radius: 10px;
}

/* ── PROPERTY FORM ELEMENTS ── */
.property-group {
    border: 1px solid var(--b-border);
    border-radius: 6px;
    margin-bottom: 8px;
    overflow: hidden;
    background: var(--b-surface2);
}

.property-group summary {
    padding: 9px 12px;
    background: var(--b-surface3);
    cursor: pointer;
    font-weight: 600;
    font-size: 0.78rem;
    border-bottom: 1px solid var(--b-border);
    color: var(--b-text2);
}

.property-group .content {
    padding: 10px 12px;
}

.property-label {
    display: block;
    font-size: 0.72rem;
    font-weight: 600;
    color: var(--b-text3);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 5px;
}

.property-input {
    width: 100%;
    padding: 7px 10px;
    background: var(--b-surface2);
    border: 1px solid var(--b-border);
    border-radius: 6px;
    color: var(--b-text);
    font-size: 0.82rem;
    transition: border-color 0.15s, box-shadow 0.15s;
    outline: none;
}

.property-input:focus {
    border-color: var(--b-accent);
    box-shadow: 0 0 0 3px rgba(91, 124, 250, 0.18);
}

.property-select {
    width: 100%;
    padding: 7px 10px;
    background: var(--b-surface2);
    border: 1px solid var(--b-border);
    border-radius: 6px;
    color: var(--b-text);
    font-size: 0.82rem;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%2364748b' stroke-width='2'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 10px center;
    padding-right: 28px;
    cursor: pointer;
    outline: none;
    transition: border-color 0.15s;
}

.property-select:focus {
    border-color: var(--b-accent);
    box-shadow: 0 0 0 3px rgba(91, 124, 250, 0.18);
}

.property-select option { background: var(--b-surface2); color: var(--b-text); }

.property-checkbox {
    accent-color: var(--b-accent);
    width: 14px;
    height: 14px;
    cursor: pointer;
    margin-right: 6px;
}

/* ── COLOR INPUT ── */
input[type="color"].property-input {
    padding: 2px 4px;
    height: 36px;
    cursor: pointer;
    background: var(--b-surface3);
}

/* ── TEXTAREA ── */
textarea.property-input {
    min-height: 80px;
    resize: vertical;
    font-family: 'Fira Code', 'Courier New', monospace;
    font-size: 0.78rem;
    line-height: 1.5;
}

/* ── COLOR PREVIEW CHIP ── */
.color-preview {
    width: 20px;
    height: 20px;
    border-radius: 4px;
    display: inline-block;
    margin-right: 6px;
    vertical-align: middle;
    border: 1px solid var(--b-border);
}

/* ── BADGES ── */
.badge {
    display: inline-block;
    padding: 2px 7px;
    border-radius: 20px;
    font-size: 0.65rem;
    font-weight: 600;
    margin-left: 6px;
}

.badge-blue {
    background: rgba(91, 124, 250, 0.2);
    color: #93c5fd;
}

.badge-purple {
    background: rgba(139, 92, 246, 0.2);
    color: #c4b5fd;
}

/* ── BLOCK ITEMS ── */
.block-item {
    background: var(--b-surface2);
    border: 1px solid var(--b-border);
    border-radius: 6px;
    margin-bottom: 8px;
    padding: 10px 12px;
    transition: all 0.15s;
}

.block-item:hover {
    border-color: var(--b-accent);
    box-shadow: 0 2px 8px rgba(91, 124, 250, 0.1);
}

.block-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    cursor: move;
}

.block-controls button {
    padding: 3px 8px;
    margin-left: 4px;
    border-radius: 4px;
    font-size: 0.7rem;
    background: var(--b-surface3);
    border: 1px solid var(--b-border);
    color: var(--b-text2);
    cursor: pointer;
    transition: all 0.15s;
}

.block-controls button:hover {
    background: var(--b-border);
    color: var(--b-text);
}

.add-block-btn {
    background: rgba(16, 185, 129, 0.15);
    color: var(--b-green);
    padding: 7px 14px;
    border-radius: 6px;
    font-size: 0.8rem;
    border: 1px solid rgba(16, 185, 129, 0.3);
    margin-bottom: 10px;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    cursor: pointer;
    transition: background 0.15s;
}

.add-block-btn:hover {
    background: rgba(16, 185, 129, 0.25);
}

/* ── COLUMN WIDTH SLIDER ── */
.column-width-slider {
    width: 100%;
    margin: 6px 0;
    accent-color: var(--b-accent);
}

.column-width-value {
    text-align: center;
    font-size: 0.8rem;
    font-weight: 500;
    margin-top: 4px;
    color: var(--b-text2);
}

/* ── NAV ITEMS ── */
.nav-item {
    padding: 6px 10px;
    background: var(--b-surface3);
    border-radius: 4px;
    margin: 0 4px;
    color: var(--b-text);
    font-size: 0.82rem;
}

/* ── CONTAINER HIGHLIGHT LABEL ── */
.container-highlight {
    border: 2px dashed var(--b-border2);
    margin: 4px 0;
    padding: 4px;
    position: relative;
}

.container-highlight::before {
    content: 'Container';
    position: absolute;
    top: -10px;
    left: 8px;
    background: rgba(139, 92, 246, 0.5);
    color: white;
    font-size: 0.65rem;
    padding: 2px 7px;
    border-radius: 4px;
    z-index: 10;
    letter-spacing: 0.05em;
}

/* ── BLOCK ORDER SELECT ── */
.block-order-select {
    height: 90px;
    background: var(--b-surface2);
    border: 1px solid var(--b-border);
    border-radius: 4px;
    color: var(--b-text);
    font-size: 0.8rem;
}

.block-order-select option { padding: 4px; }

/* ── TEMPLATE ACTION BTN ── */
.template-action-btn {
    transition: all 0.15s;
}

.template-action-btn:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}

/* ── SAVED TEMPLATES LIST ITEMS ── */
#saved-templates-list > div {
    transition: background 0.15s;
    border-radius: 5px;
    padding: 7px 10px;
    cursor: pointer;
}

#saved-templates-list > div:hover {
    background: #2a2f45;
}

/* ── RESPONSIVE ── */
@media (max-width: 768px) {
    .section-item, .container-item {
        flex-direction: row;
    }

    .property-input, .property-select {
        font-size: 0.9rem;
    }
}

/* ── DETAILS ELEMENT DEFAULTS ── */
details {
    background: var(--b-surface2);
    border: 1px solid var(--b-border);
    border-radius: 6px;
    margin-bottom: 8px;
    overflow: hidden;
}

details summary {
    padding: 9px 12px;
    background: var(--b-surface3);
    cursor: pointer;
    font-weight: 600;
    font-size: 0.78rem;
    border-bottom: 1px solid var(--b-border);
    color: var(--b-text2);
    list-style: none;
    user-select: none;
    display: flex;
    align-items: center;
    gap: 6px;
}

details summary::-webkit-details-marker { display: none; }

details summary::before {
    content: '›';
    font-size: 1rem;
    line-height: 1;
    transition: transform 0.2s;
    color: var(--b-text3);
    display: inline-block;
}

details[open] summary::before { transform: rotate(90deg); }

details .p-2, details .content {
    padding: 10px 12px !important;
}

details .mb-3 { margin-bottom: 10px !important; }

/* ── MISC UTILITIES ── */
.message-box {
    transition: opacity 0.3s;
}

.nav-link { font-weight: 500 !important; }