/* ==========================================================================
   GLOBAL DOCUMENT TRACEABILITY DASHBOARD STYLESHEET (LIGHT THEME)
   ========================================================================== */

:root {
    --trace-bg-page: #f8fafc;
    --trace-bg-card: #ffffff;
    --trace-bg-subtle: #f1f5f9;
    --trace-border-color: #e2e8f0;
    --trace-border-strong: #cbd5e1;
    --trace-accent-blue: #059669;
    --trace-accent-cyan: #0891b2;
    --trace-accent-purple: #9333ea;
    --trace-accent-emerald: #059669;
    --trace-accent-amber: #d97706;
    --trace-text-main: #0f172a;
    --trace-text-muted: #64748b;
    --trace-text-subtle: #94a3b8;
    --trace-radius-lg: 0.75rem;
    --trace-radius-md: 0.5rem;
    --trace-radius-sm: 0.375rem;
    --trace-font: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}

/* Base Page Styling */
.traceability-page, .trace-page {
    background-color: var(--trace-bg-page);
    color: var(--trace-text-main);
    min-height: 100vh;
    padding: 1.5rem;
    font-family: var(--trace-font);
    box-sizing: border-box;
}

/* ==========================================================================
   1. HEADER & SEARCH SECTION
   ========================================================================== */

.traceability-header, .trace-search-bar {
    background: var(--trace-bg-card);
    border: 1px solid var(--trace-border-color);
    border-radius: var(--trace-radius-lg);
    padding: 1.25rem 1.5rem;
    margin-bottom: 1.5rem;
    box-shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.05);
    display: flex;
    align-items: center;
    gap: 1rem;
}

.trace-search-icon {
    color: var(--trace-text-muted);
    font-size: 1.25rem;
}

.trace-search-input {
    flex: 1;
    background: transparent;
    border: none;
    outline: none;
    color: var(--trace-text-main);
    font-size: 0.95rem;
    font-weight: 500;
}

    .trace-search-input::placeholder {
        color: var(--trace-text-subtle);
    }

.traceability-suggestions {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.8rem;
    color: var(--trace-text-muted);
    margin-bottom: 1.5rem;
}


/* ==========================================================================
   2. LIFECYCLE PIPELINE (PROGRESSION STAGES)
   ========================================================================== */

.trace-pipeline, .pipeline-card {
    display: flex;
    align-items: stretch;
    gap: 0.75rem;
    background: var(--trace-bg-card);
    border: 1px solid var(--trace-border-color);
    border-radius: var(--trace-radius-lg);
    padding: 1.25rem;
    margin-bottom: 1.5rem;
    box-shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.05);
    overflow-x: auto;
}

.trace-pipeline-stage {
    flex: 1;
    min-width: 180px;
    background: var(--trace-bg-subtle);
    border: 1px solid var(--trace-border-color);
    border-radius: var(--trace-radius-md);
    padding: 1rem;
    position: relative;
    transition: all 0.2s ease;
}

    .trace-pipeline-stage:hover {
        border-color: var(--trace-border-strong);
    }

/* Current Search Stage Highlight */
.trace-stage-current {
    border-color: var(--trace-accent-blue) !important;
    background: #ecfdf5 !important;
    box-shadow: 0 0 0 1px var(--trace-accent-blue);
}

.trace-current-tag {
    position: absolute;
    top: -10px;
    left: 12px;
    background: var(--trace-accent-blue);
    color: #ffffff;
    font-size: 0.65rem;
    font-weight: 700;
    text-transform: uppercase;
    padding: 0.15rem 0.5rem;
    border-radius: 999px;
}

.trace-stage-title {
    color: var(--trace-text-main);
    font-weight: 700;
    font-size: 0.875rem;
}

.trace-stage-sub {
    color: var(--trace-text-muted);
    font-size: 0.75rem;
    margin-top: 0.25rem;
    font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
}

.trace-stage-status {
    display: inline-block;
    margin-top: 0.5rem;
    background: #dcfce7;
    color: var(--trace-accent-emerald);
    font-size: 0.7rem;
    font-weight: 600;
    padding: 0.15rem 0.5rem;
    border-radius: 999px;
    border: 1px solid #bbf7d0;
}

.trace-pipeline-arrow {
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--trace-text-subtle);
    font-size: 1.25rem;
}

/* ==========================================================================
   3. THREE-COLUMN LAYOUT (UPSTREAM / CURRENT / DOWNSTREAM)
   ========================================================================== */

.trace-columns {
    display: grid;
    grid-template-columns: 1fr 1.25fr 1fr;
    gap: 1.25rem;
    align-items: start;
}

@media (max-width: 900px) {
    .trace-columns {
        grid-template-columns: 1fr;
    }
}

.trace-column-heading {
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--trace-text-muted);
    margin-bottom: 0.75rem;
}

.trace-empty-column {
    color: var(--trace-text-muted);
    font-size: 0.825rem;
    background: var(--trace-bg-card);
    border: 1px dashed var(--trace-border-color);
    border-radius: var(--trace-radius-md);
    padding: 1.5rem;
    text-align: center;
}

/* ==========================================================================
   4. NODE CARDS (PARENT & CHILD DOCUMENTS)
   ========================================================================== */

.trace-node-card, .trace-node-item {
    background: var(--trace-bg-card);
    border: 1px solid var(--trace-border-color);
    border-radius: var(--trace-radius-md);
    padding: 1rem;
    margin-bottom: 0.85rem;
    cursor: pointer;
    transition: all 0.2s ease;
    box-shadow: 0 1px 2px 0 rgba(0, 0, 0, 0.03);
}

    .trace-node-card:hover, .trace-node-item:hover {
        border-color: var(--trace-accent-blue);
        box-shadow: 0 4px 12px rgba(37, 99, 235, 0.08);
        transform: translateY(-1px);
    }

.trace-node-number {
    font-weight: 700;
    font-size: 0.925rem;
    color: var(--trace-accent-blue);
    font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
}

.trace-node-status {
    font-size: 0.68rem;
    font-weight: 700;
    padding: 0.15rem 0.5rem;
    border-radius: 999px;
    text-transform: uppercase;
}

.trace-node-date {
    color: var(--trace-text-muted);
    font-size: 0.75rem;
    margin-top: 0.25rem;
}

.trace-node-customer {
    font-size: 0.825rem;
    color: var(--trace-text-main);
    margin-top: 0.35rem;
    font-weight: 500;
}

.trace-node-amount {
    font-weight: 700;
    font-size: 0.875rem;
    color: var(--trace-text-main);
    margin-top: 0.5rem;
}

.trace-node-btn {
    background: var(--trace-bg-subtle);
    border: 1px solid var(--trace-border-color);
    border-radius: var(--trace-radius-sm);
    padding: 0.35rem 0.65rem;
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--trace-text-main);
    cursor: pointer;
    transition: all 0.15s ease;
}

    .trace-node-btn:hover {
        background: var(--trace-border-color);
    }

/* ==========================================================================
   5. CENTER CARD (CURRENT ACTIVE FOCUS DOCUMENT)
   ========================================================================== */

.trace-column-current {
    position: sticky;
    top: 1.25rem;
}

.trace-current-card, .active-focus-card {
    background: var(--trace-bg-card);
    border: 2px solid var(--trace-accent-blue);
    border-radius: var(--trace-radius-lg);
    padding: 1.25rem;
    box-shadow: 0 10px 25px -5px rgba(37, 99, 235, 0.1);
}

.trace-current-number {
    font-weight: 800;
    font-size: 1.15rem;
    color: var(--trace-text-main);
    font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
}

.trace-current-table {
    width: 100%;
    font-size: 0.825rem;
    border-collapse: collapse;
    margin-top: 0.75rem;
}

    .trace-current-table td {
        padding: 0.4rem 0;
        color: var(--trace-text-main);
        border-bottom: 1px solid var(--trace-border-color);
    }

    .trace-current-table tr:last-child td {
        border-bottom: none;
    }

    .trace-current-table td:first-child {
        color: var(--trace-text-muted);
        width: 45%;
        font-weight: 500;
    }

.trace-view-btn {
    width: 100%;
    background: var(--trace-accent-blue);
    color: #ffffff;
    border: none;
    border-radius: var(--trace-radius-md);
    padding: 0.65rem;
    font-weight: 700;
    font-size: 0.85rem;
    cursor: pointer;
    transition: all 0.2s ease;
    margin-top: 1rem;
}

    .trace-view-btn:hover {
        background: #047857;
    }

/* ==========================================================================
   6. TABLES & BADGES
   ========================================================================== */

.item-table-container {
    max-height: 15rem;
    overflow-y: auto;
    border-radius: var(--trace-radius-sm);
    border: 1px solid var(--trace-border-color);
}

.item-table {
    width: 100%;
    text-align: left;
    font-size: 0.75rem;
    border-collapse: collapse;
}

    .item-table th {
        background-color: var(--trace-bg-subtle);
        color: var(--trace-text-muted);
        padding: 0.5rem;
        position: sticky;
        top: 0;
        font-weight: 600;
    }

    .item-table td {
        padding: 0.5rem;
        border-top: 1px solid var(--trace-border-color);
    }

/* Status Badges */
.badge-status-confirmed {
    background-color: #dcfce7;
    color: #15803d;
    border: 1px solid #bbf7d0;
}

.badge-status-dispatched {
    background-color: #e0f2fe;
    color: #0369a1;
    border: 1px solid #bae6fd;
}

.badge-status-accepted {
    background-color: #f3e8ff;
    color: #6b21a8;
    border: 1px solid #e9d5ff;
}

/* Empty State */
.trace-empty {
    text-align: center;
    color: var(--trace-text-muted);
    padding: 3.5rem 1rem;
    background: var(--trace-bg-card);
    border: 1px dashed var(--trace-border-color);
    border-radius: var(--trace-radius-lg);
}