* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: #0f172a;
    color: #e2e8f0;
    min-height: 100vh;
    padding-bottom: 2rem;
}

header {
    background: linear-gradient(135deg, #1e293b, #334155);
    padding: 1.5rem 2rem;
    text-align: center;
    border-bottom: 2px solid #3b82f6;
}

header h1 {
    font-size: 1.8rem;
    color: #60a5fa;
}

.subtitle {
    color: #94a3b8;
    font-size: 0.9rem;
    margin-top: 0.25rem;
}

/* Upload Section */
#upload-section {
    max-width: 600px;
    margin: 3rem auto;
    text-align: center;
}

.upload-area {
    border: 2px dashed #475569;
    border-radius: 12px;
    padding: 3rem 2rem;
    cursor: pointer;
    transition: all 0.3s;
    background: #1e293b;
}

.upload-area:hover, .upload-area.dragover {
    border-color: #3b82f6;
    background: #1e3a5f;
}

.upload-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.upload-area p {
    color: #94a3b8;
}

.upload-area input[type="file"] {
    display: none;
}

#analyze-btn {
    margin-top: 1.5rem;
    padding: 0.75rem 2.5rem;
    background: #3b82f6;
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    cursor: pointer;
    transition: background 0.3s;
}

#analyze-btn:disabled {
    background: #475569;
    cursor: not-allowed;
}

#analyze-btn:not(:disabled):hover {
    background: #2563eb;
}

.error {
    color: #f87171;
    margin-top: 1rem;
    padding: 0.75rem;
    background: #450a0a;
    border-radius: 8px;
}

.hidden {
    display: none !important;
}

/* Loading / Batch Progress */
#batch-progress {
    margin-top: 2rem;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.progress-track {
    height: 8px;
    background: #334155;
    border-radius: 4px;
    overflow: hidden;
    width: 100%;
}

.progress-fill {
    height: 100%;
    width: 0%;
    background: #3b82f6;
    border-radius: 4px;
    transition: width 0.3s ease-out;
}

.progress-label {
    color: #94a3b8;
    font-size: 0.9rem;
    margin-top: 0.5rem;
    text-align: center;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

/* File list chips */
.file-list {
    list-style: none;
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-top: 1rem;
    max-height: 200px;
    overflow-y: auto;
    padding: 0.25rem;
}

.file-chip {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    background: #0f172a;
    border: 1px solid #334155;
    border-radius: 16px;
    padding: 0.3rem 0.75rem;
    font-size: 0.8rem;
    color: #cbd5e1;
    max-width: 260px;
}

.file-chip .chip-name {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.file-chip .chip-remove {
    cursor: pointer;
    color: #94a3b8;
    font-weight: 700;
    padding: 0 0.2rem;
}

.file-chip .chip-remove:hover {
    color: #f87171;
}

.file-chip.in-flight {
    border-color: #3b82f6;
    animation: pulse 1.2s ease-in-out infinite;
}

.file-chip.success {
    border-color: #6ee7b7;
}

.file-chip.error {
    border-color: #f87171;
}

.file-chip .chip-status {
    font-size: 0.7rem;
    opacity: 0.7;
}

/* Dashboard */
#dashboard {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1.5rem;
}

.card {
    background: #1e293b;
    border-radius: 12px;
    padding: 1.5rem;
    margin-bottom: 1.5rem;
    border: 1px solid #334155;
}

.card h3 {
    color: #60a5fa;
    margin-bottom: 1rem;
    font-size: 1.1rem;
}

/* Summary Bar */
.summary-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: linear-gradient(135deg, #1e293b, #1e3a5f);
    border-radius: 12px;
    padding: 1.5rem 2rem;
    margin-bottom: 1.5rem;
    border: 1px solid #3b82f6;
}

.customer-info h2 {
    font-size: 1.5rem;
    color: #f1f5f9;
}

.period {
    color: #94a3b8;
    font-size: 0.9rem;
}

.score-display {
    text-align: center;
}

.score-circle {
    display: inline-flex;
    align-items: baseline;
    gap: 2px;
}

.score-value {
    font-size: 3rem;
    font-weight: 700;
}

.score-max {
    font-size: 1.2rem;
    color: #94a3b8;
}

.grade-badge {
    display: inline-block;
    padding: 0.25rem 1rem;
    border-radius: 20px;
    font-weight: 600;
    font-size: 0.9rem;
    margin-top: 0.5rem;
}

.grade-A { background: #065f46; color: #6ee7b7; }
.grade-B { background: #1e3a5f; color: #60a5fa; }
.grade-C { background: #713f12; color: #fbbf24; }
.grade-D { background: #7c2d12; color: #fb923c; }
.grade-F { background: #7f1d1d; color: #f87171; }

/* Score Components */
.score-components {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
}

.component {
    background: #0f172a;
    border-radius: 8px;
    padding: 1rem;
}

.component-header {
    display: flex;
    justify-content: space-between;
    margin-bottom: 0.5rem;
}

.component-name {
    font-size: 0.85rem;
    color: #94a3b8;
}

.component-score {
    font-weight: 700;
    font-size: 0.95rem;
}

.component-bar {
    height: 6px;
    background: #334155;
    border-radius: 3px;
    overflow: hidden;
}

.component-fill {
    height: 100%;
    border-radius: 3px;
    transition: width 0.8s ease-out;
}

.component-detail {
    font-size: 0.75rem;
    color: #64748b;
    margin-top: 0.4rem;
}

/* Charts */
.chart-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
    margin-bottom: 1.5rem;
}

.chart-card {
    margin-bottom: 0;
}

/* Chart.js requires a positioned wrapper with explicit height for cross-browser
   canvas sizing (Firefox ignores max-height on <canvas> and renders 0-height). */
.chart-container {
    position: relative;
    height: 280px;
}

.chart-container--wide {
    height: 220px;
}

/* Metrics Grid */
.metrics-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 1rem;
}

.metric {
    background: #0f172a;
    border-radius: 8px;
    padding: 1rem;
    text-align: center;
}

.metric-value {
    font-size: 1.5rem;
    font-weight: 700;
    color: #f1f5f9;
}

.metric-label {
    font-size: 0.8rem;
    color: #94a3b8;
    margin-top: 0.25rem;
}

/* Detail Table */
.table-wrapper {
    overflow-x: auto;
}

table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.85rem;
}

th {
    background: #0f172a;
    color: #60a5fa;
    padding: 0.75rem 0.5rem;
    text-align: left;
    white-space: nowrap;
    position: sticky;
    top: 0;
}

td {
    padding: 0.6rem 0.5rem;
    border-bottom: 1px solid #1e293b;
    white-space: nowrap;
}

tr:hover td {
    background: #1e3a5f22;
}

.status-paid {
    color: #6ee7b7;
    font-weight: 600;
}

.status-partial {
    color: #fbbf24;
    font-weight: 600;
}

.status-outstanding {
    color: #f87171;
    font-weight: 600;
}

/* Buttons */
.secondary-btn {
    display: block;
    margin: 1rem auto 0;
    padding: 0.6rem 2rem;
    background: #334155;
    color: #e2e8f0;
    border: 1px solid #475569;
    border-radius: 8px;
    cursor: pointer;
    font-size: 0.9rem;
    transition: background 0.3s;
}

.secondary-btn:hover {
    background: #475569;
}

/* Portfolio Section */
#portfolio-section {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1.5rem;
}

.portfolio-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
}

.portfolio-header h2 {
    font-size: 1.5rem;
    color: #f1f5f9;
}

.portfolio-header .period {
    color: #94a3b8;
    font-size: 0.85rem;
}

/* Portfolio Table */
.portfolio-table th {
    cursor: pointer;
    user-select: none;
}

.portfolio-table th.sort-asc::after {
    content: ' \25B2';
    font-size: 0.7rem;
}

.portfolio-table th.sort-desc::after {
    content: ' \25BC';
    font-size: 0.7rem;
}

.portfolio-table td.numeric,
.portfolio-table th.numeric {
    text-align: right;
    font-variant-numeric: tabular-nums;
}

.portfolio-table td.customer-cell {
    max-width: 240px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.portfolio-table tr[data-clickable="true"] {
    cursor: pointer;
}

.portfolio-table tr[data-clickable="true"]:hover td {
    background: #1e3a5f66;
}

.portfolio-table tr.error-row td {
    color: #64748b;
    cursor: default;
}

.portfolio-table tr.error-row:hover td {
    background: transparent;
}

.status-pill {
    display: inline-block;
    padding: 0.15rem 0.6rem;
    border-radius: 10px;
    font-size: 0.72rem;
    font-weight: 600;
}

.status-pill.ok {
    background: #065f46;
    color: #6ee7b7;
}

.status-pill.err {
    background: #7f1d1d;
    color: #f87171;
}

/* Dashboard Nav */
#dashboard-nav {
    position: sticky;
    top: 0;
    display: flex;
    justify-content: flex-end;
    gap: 0.5rem;
    padding: 0.75rem 1rem;
    margin: -0.5rem -0.5rem 1rem;
    background: rgba(15, 23, 42, 0.9);
    border: 1px solid rgba(148, 163, 184, 0.2);
    border-radius: 10px;
    backdrop-filter: blur(8px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
    z-index: 50;
}

#dashboard-nav .secondary-btn {
    margin: 0;
}

/* Export dropdown */
.export-dropdown {
    position: relative;
}

.export-menu {
    position: absolute;
    top: calc(100% + 6px);
    right: 0;
    min-width: 170px;
    background: #1e293b;
    border: 1px solid rgba(148, 163, 184, 0.25);
    border-radius: 8px;
    padding: 0.3rem;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.5);
    z-index: 60;
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.export-menu button {
    display: block;
    width: 100%;
    text-align: left;
    background: transparent;
    color: #e2e8f0;
    border: none;
    padding: 0.55rem 0.75rem;
    border-radius: 6px;
    cursor: pointer;
    font-size: 0.9rem;
    font-family: inherit;
}

.export-menu button:hover {
    background: rgba(59, 130, 246, 0.25);
}

/* Responsive */
@media (max-width: 768px) {
    .chart-row {
        grid-template-columns: 1fr;
    }
    .summary-bar {
        flex-direction: column;
        text-align: center;
        gap: 1rem;
    }
    .score-components {
        grid-template-columns: 1fr;
    }
    .portfolio-table {
        font-size: 0.75rem;
    }
    .portfolio-table th:nth-child(2),
    .portfolio-table td:nth-child(2),
    .portfolio-table th:nth-child(8),
    .portfolio-table td:nth-child(8) {
        display: none;
    }
}