:root {
    --builder-bg: #f4f7fb;
    --builder-surface: #ffffff;
    --builder-surface-2: #f8fbff;
    --builder-border: #dbe3ef;
    --builder-border-strong: #c7d2e3;
    --builder-text: #0f172a;
    --builder-muted: #64748b;
    --builder-primary: #2563eb;
    --builder-primary-soft: rgba(37,99,235,.10);
    --builder-success-soft: rgba(34,197,94,.10);
    --builder-radius: 18px;
    --builder-radius-sm: 12px;
    --builder-shadow: 0 12px 28px rgba(15,23,42,.08);
}

.hb-page {
    background: var(--builder-bg);
    min-height: 100vh;
    padding: 16px;
}

.builder-panel,
.builder-canvas-panel,
.builder-inspector,
.builder-palette {
    background: var(--builder-surface);
    border: 1px solid var(--builder-border);
    border-radius: var(--builder-radius);
    box-shadow: var(--builder-shadow);
}

.builder-panel-header {
    padding: 16px 18px 10px;
    border-bottom: 1px solid #eef2f7;
}

.builder-panel-title {
    font-size: 15px;
    font-weight: 800;
    color: var(--builder-text);
    line-height: 1.2;
}

.builder-panel-subtitle {
    font-size: 12px;
    color: var(--builder-muted);
    margin-top: 4px;
}

.builder-palette {
    overflow: hidden;
}

.builder-palette-search {
    padding: 14px 16px 6px;
}

.builder-palette-search .input-group-text,
.hb-type-search .input-group-text {
    background: #fff;
}

.builder-palette-group {
    padding-bottom: 10px;
}

.builder-palette-group-title {
    font-size: 12px;
    font-weight: 800;
    letter-spacing: .04em;
    text-transform: uppercase;
    color: var(--builder-muted);
    padding: 10px 16px 8px;
}

.builder-palette-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px;
    padding: 0 16px 16px;
}

.builder-widget-card,
.builder-widget {
    width: 100%;
    border: 1px solid var(--builder-border);
    background: linear-gradient(180deg, #fff 0%, #fbfdff 100%);
    border-radius: 14px;
    padding: 12px;
    display: flex;
    align-items: flex-start;
    gap: 10px;
    text-align: left;
    transition: .18s ease;
    cursor: pointer;
}

.builder-widget-card:hover,
.builder-widget:hover {
    border-color: #b9caea;
    transform: translateY(-1px);
    box-shadow: 0 10px 18px rgba(37,99,235,.08);
}

.builder-widget-card:active,
.builder-widget:active {
    transform: translateY(0);
}

.builder-widget-icon {
    width: 40px;
    height: 40px;
    border-radius: 12px;
    background: var(--builder-primary-soft);
    color: var(--builder-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    flex: 0 0 40px;
    font-size: 15px;
}

.builder-widget-body {
    min-width: 0;
}

.builder-widget-title {
    font-size: 14px;
    font-weight: 700;
    color: var(--builder-text);
    line-height: 1.2;
}

.builder-widget-desc {
    font-size: 12px;
    color: var(--builder-muted);
    margin-top: 4px;
    line-height: 1.35;
}

.builder-widget-type {
    display: inline-block;
    margin-top: 7px;
    padding: 2px 8px;
    border-radius: 999px;
    background: #f1f5f9;
    color: #475569;
    font-size: 11px;
    font-weight: 700;
}

.builder-canvas-panel {
    overflow: hidden;
}

.builder-canvas-toolbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 12px;
    padding: 14px 18px;
    border-bottom: 1px solid #eef2f7;
    background: #fff;
}

.builder-canvas-title {
    font-size: 15px;
    font-weight: 800;
    color: var(--builder-text);
}

.builder-canvas-subtitle {
    font-size: 12px;
    color: var(--builder-muted);
    margin-top: 4px;
}

.builder-canvas-body {
    padding: 18px;
    background:
        linear-gradient(90deg, rgba(148,163,184,.06) 1px, transparent 1px),
        linear-gradient(rgba(148,163,184,.06) 1px, transparent 1px);
    background-size: 24px 24px;
    min-height: 760px;
}

.builder-empty-state {
    border: 2px dashed #cbd9f1;
    border-radius: 16px;
    background: #f8fbff;
    padding: 32px;
    text-align: center;
}

.builder-empty-state-title {
    font-size: 18px;
    font-weight: 800;
    color: var(--builder-text);
}

.builder-empty-state-text {
    color: var(--builder-muted);
    margin-top: 6px;
}

.builder-dropzone {
    border: 2px dashed #bfd1f3;
    border-radius: 16px;
    background: #f8fbff;
    color: #5b6f93;
    padding: 18px;
    text-align: center;
    transition: .18s ease;
}

.builder-dropzone.builder-dropzone-over {
    border-color: var(--builder-primary);
    background: #eef4ff;
    box-shadow: 0 0 0 4px rgba(37,99,235,.10);
}

.builder-outline-node,
.hb-node {
    border: 1px solid var(--builder-border);
    background: #fff;
    border-radius: 14px;
    padding: 12px;
    transition: .18s ease;
}

.builder-outline-node:hover,
.hb-node:hover {
    border-color: var(--builder-border-strong);
    box-shadow: 0 8px 18px rgba(15,23,42,.06);
}

.builder-outline-node.active,
.hb-node.active {
    border-color: var(--builder-primary);
    background: #f8fbff;
    box-shadow: 0 0 0 4px rgba(37,99,235,.10);
}

.builder-outline-children,
.hb-children {
    margin-left: 14px;
    padding-left: 12px;
    border-left: 2px solid #edf2f7;
    display: grid;
    gap: 10px;
    margin-top: 10px;
}

.builder-inspector {
    overflow: hidden;
}

.builder-inspector-scroll {
    padding: 16px;
    max-height: calc(100vh - 180px);
    overflow: auto;
}

.builder-form-section {
    border: 1px solid #edf2f7;
    background: var(--builder-surface-2);
    border-radius: 16px;
    padding: 14px;
    margin-bottom: 14px;
}

.builder-form-section-title {
    font-size: 13px;
    font-weight: 800;
    color: var(--builder-text);
    margin-bottom: 12px;
}

.builder-inspector label,
.builder-form-section .form-label {
    font-size: 12px;
    font-weight: 700;
    color: #475569;
    margin-bottom: 6px;
}

.builder-inspector .form-control,
.builder-inspector .form-select,
.builder-inspector textarea {
    border-radius: 12px;
    border: 1px solid var(--builder-border);
    min-height: 42px;
}

.builder-inspector textarea {
    min-height: auto;
}

.builder-inspector .form-control:focus,
.builder-inspector .form-select:focus,
.builder-inspector textarea:focus {
    border-color: #93b4f5;
    box-shadow: 0 0 0 4px rgba(37,99,235,.10);
}

.builder-inspector .btn-primary,
.builder-inspector .btn-outline-secondary,
.builder-inspector .btn-outline-danger {
    border-radius: 14px;
    min-height: 42px;
    font-weight: 700;
}

.hb-row-shell,
.hb-col-shell,
.hb-block-shell {
    border: 1px solid var(--builder-border);
    background: #fff;
    border-radius: 16px;
    padding: 14px;
    transition: .18s ease;
}

.hb-row-shell:hover,
.hb-col-shell:hover,
.hb-block-shell:hover {
    border-color: var(--builder-border-strong);
    box-shadow: 0 8px 18px rgba(15,23,42,.06);
}

.hb-row-shell.active,
.hb-col-shell.active,
.hb-block-shell.active {
    border-color: var(--builder-primary);
    background: #f8fbff;
    box-shadow: 0 0 0 4px rgba(37,99,235,.10);
}

.hb-row-head,
.hb-col-head,
.hb-block-head {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 10px;
    margin-bottom: 12px;
}

.hb-row-title,
.hb-col-title,
.hb-block-title {
    font-weight: 800;
    color: var(--builder-text);
    line-height: 1.2;
}

.hb-row-meta,
.hb-col-meta,
.hb-block-meta {
    color: var(--builder-muted);
    font-size: 12px;
    margin-top: 3px;
}

.hb-block-preview-slot {
    margin-top: 10px;
}

.hb-block-preview-placeholder {
    border-radius: 12px;
    padding: 12px;
    border: 1px dashed #cbd9f1;
    background: #f8fbff;
    color: #5b6f93;
    font-size: 12px;
}

.builder-add-widget-btn {
    width: 100%;
    border: 2px dashed #bfd1f3;
    border-radius: 14px;
    background: #f8fbff;
    color: #3157a7;
    padding: 12px 14px;
    font-weight: 700;
    transition: .18s ease;
}

.builder-add-widget-btn:hover {
    border-color: var(--builder-primary);
    background: #eef4ff;
}

@media (max-width: 1399.98px) {
    .builder-shell {
        grid-template-columns: 250px minmax(0,1fr) 320px;
    }
}

@media (max-width: 1199.98px) {
    .builder-shell {
        grid-template-columns: 1fr;
    }

    .builder-inspector-scroll {
        max-height: none;
    }

    .builder-palette-grid {
        grid-template-columns: 1fr;
    }
}
/* === PRO RIGHT TABS LAYOUT === */

.builder-shell-pro {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 420px;
    gap: 18px;
    align-items: start;
}

.builder-main {
    min-width: 0;
    display: grid;
    gap: 14px;
}

.builder-main-top {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 14px;
    background: var(--builder-surface);
    border: 1px solid var(--builder-border);
    border-radius: var(--builder-radius);
    box-shadow: var(--builder-shadow);
    padding: 14px 16px;
}

.builder-main-title {
    font-size: 15px;
    font-weight: 800;
    color: var(--builder-text);
}

.builder-main-top-actions {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.builder-right-tabs {
    min-width: 0;
    background: var(--builder-surface);
    border: 1px solid var(--builder-border);
    border-radius: var(--builder-radius);
    box-shadow: var(--builder-shadow);
    overflow: hidden;
    position: sticky;
    top: 16px;
}

.builder-right-tabs-head {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 0;
    border-bottom: 1px solid #eef2f7;
    background: #fff;
}

.builder-tab {
    border: 0;
    background: transparent;
    min-height: 52px;
    font-weight: 700;
    color: var(--builder-muted);
    border-right: 1px solid #eef2f7;
}

    .builder-tab:last-child {
        border-right: 0;
    }

    .builder-tab.active {
        color: var(--builder-primary);
        background: #f4f8ff;
    }

.builder-right-tabs-body {
    background: var(--builder-surface);
}

.builder-tab-panel {
    padding: 14px;
}

.builder-span-picker {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.builder-span-chip {
    min-width: 48px;
    height: 40px;
    border-radius: 12px;
    border: 1px solid var(--builder-border);
    background: #fff;
    font-weight: 700;
    color: var(--builder-text);
}

    .builder-span-chip.active {
        background: var(--builder-primary);
        color: #fff;
        border-color: var(--builder-primary);
        box-shadow: 0 10px 18px rgba(37,99,235,.18);
    }

.builder-layers-scroll {
    padding: 14px;
    display: grid;
    gap: 8px;
    max-height: calc(100vh - 180px);
    overflow: auto;
}

.builder-layer-item {
    border: 1px solid var(--builder-border);
    background: #fff;
    border-radius: 12px;
    padding: 10px 12px;
    cursor: pointer;
}

    .builder-layer-item.active {
        border-color: var(--builder-primary);
        background: #f8fbff;
        box-shadow: 0 0 0 3px rgba(37,99,235,.10);
    }

.builder-layer-child {
    margin-left: 18px;
}

.builder-layer-subchild {
    margin-left: 36px;
}

.builder-preview-box {
    min-height: 280px;
    border: 2px dashed #bfd1f3;
    border-radius: 16px;
    background: #f8fbff;
    color: #5b6f93;
    display: grid;
    place-items: center;
    text-align: center;
    padding: 20px;
}

@media (max-width: 1399.98px) {
    .builder-shell-pro {
        grid-template-columns: minmax(0, 1fr) 360px;
    }
}

@media (max-width: 1199.98px) {
    .builder-shell-pro {
        grid-template-columns: 1fr;
    }

    .builder-right-tabs {
        position: static;
    }

    .builder-right-tabs-head {
        grid-template-columns: repeat(2, 1fr);
    }
}