/* Focus Noise Calibration Analyzer - Enhanced Styles */

:root {
    --primary: #2563eb;
    --primary-dark: #1d4ed8;
    --primary-light: #1e3a5f;
    --bg: #0f172a;
    --card-bg: #1e293b;
    --text: #e2e8f0;
    --text-secondary: #94a3b8;
    --border: #334155;
    --success: #16a34a;
    --success-bg: #052e16;
    --warning: #d97706;
    --warning-bg: #422006;
    --danger: #dc2626;
    --danger-bg: #450a0a;
    --info: #0891b2;
    --info-bg: #164e63;
    --radius: 12px;
    --shadow: 0 1px 3px rgba(0,0,0,0.08), 0 1px 2px rgba(0,0,0,0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.08), 0 4px 6px -2px rgba(0,0,0,0.04);
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
}

.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 1.5rem;
}

/* Header */
header {
    background: linear-gradient(135deg, #0f172a 0%, #1e3a5f 100%);
    color: #e2e8f0;
    padding: 1.5rem 2rem;
    border-radius: var(--radius);
    margin-bottom: 1.5rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: var(--shadow-lg);
}
header h1 {
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: -0.02em;
}
header h1 span { color: #93c5fd; }
.back-link {
    color: rgba(255,255,255,0.85);
    text-decoration: none;
    font-size: 0.9rem;
    padding: 0.4rem 0.8rem;
    border-radius: 6px;
    background: rgba(255,255,255,0.1);
    transition: all 0.2s;
}
.back-link:hover { background: rgba(255,255,255,0.2); color: #e2e8f0; }

/* Cards */
.card {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.25rem;
    box-shadow: var(--shadow);
    transition: box-shadow 0.2s;
}
.card:hover { box-shadow: var(--shadow-lg); }

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.5rem 1rem;
    border-radius: 8px;
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    border: 1px solid var(--border);
    background: var(--card-bg);
    color: var(--text);
    text-decoration: none;
    transition: all 0.15s;
}
.btn:hover { background: #1e293b; border-color: #94a3b8; }
.btn-primary {
    background: var(--primary);
    color: #e2e8f0;
    border-color: var(--primary);
}
.btn-primary:hover { background: var(--primary-dark); }
.btn-danger { background: var(--danger); color: #e2e8f0; border-color: var(--danger); }
.btn-danger:hover { background: #b91c1c; }
.btn-success { background: var(--success); color: #e2e8f0; border-color: var(--success); }
.btn-success:hover { background: #15803d; }
.btn-sm { padding: 0.3rem 0.6rem; font-size: 0.8rem; }
.btn-lg { padding: 0.75rem 1.5rem; font-size: 1rem; }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }

/* Project Info */
.project-info {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.25rem;
    margin-bottom: 1.5rem;
    box-shadow: var(--shadow);
}
.info-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 1rem;
}
.info-item {
    display: flex;
    flex-direction: column;
}
.info-item .label { font-size: 0.75rem; color: var(--text-secondary); text-transform: uppercase; letter-spacing: 0.05em; }
.info-item .value { font-size: 0.95rem; font-weight: 500; margin-top: 0.2rem; }

/* Badge / Status */
.badge {
    display: inline-flex;
    align-items: center;
    padding: 0.2rem 0.5rem;
    border-radius: 999px;
    font-size: 0.75rem;
    font-weight: 600;
    line-height: 1.3;
}
.badge-success { background: var(--success-bg); color: #4ade80; }
.badge-warning { background: var(--warning-bg); color: #fbbf24; }
.badge-error { background: var(--danger-bg); color: #fca5a5; }
.badge-info { background: var(--info-bg); color: #67e8f9; }
.badge-neutral { background: #1e293b; color: #94a3b8; }

.status-created { background: #1e293b; color: #94a3b8; }
.status-analyzing { background: var(--warning-bg); color: #fbbf24; }
.status-completed { background: var(--success-bg); color: #4ade80; }

/* Batch Upload Bar */
.upload-bar {
    background: linear-gradient(135deg, #1e293b 0%, #334155 100%);
    color: #e2e8f0;
    border-radius: var(--radius);
    padding: 1.25rem 1.5rem;
    margin-bottom: 1.5rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 1rem;
    box-shadow: var(--shadow-lg);
}
.upload-bar .upload-title { font-size: 1rem; font-weight: 600; display: flex; align-items: center; gap: 0.5rem; }
.upload-bar .upload-title span { color: #93c5fd; }
.upload-bar .upload-actions { display: flex; gap: 0.5rem; align-items: center; flex-wrap: wrap; }

/* Upload Queue */
.upload-queue {
    display: none;
    background: var(--card-bg);
    border: 2px dashed var(--primary);
    border-radius: var(--radius);
    padding: 1rem;
    margin-bottom: 1.5rem;
}
.upload-queue.active { display: block; }
.upload-queue-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.75rem;
    font-weight: 600;
    color: var(--text);
}
.upload-queue-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.5rem;
    border: 1px solid var(--border);
    border-radius: 8px;
    margin-bottom: 0.4rem;
    background: #1e293b;
    transition: all 0.2s;
}
.upload-queue-item:hover { background: var(--primary-light); }
.upload-queue-item .file-icon { font-size: 1.2rem; }
.upload-queue-item .file-name { flex: 1; font-size: 0.85rem; font-weight: 500; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.upload-queue-item select {
    font-size: 0.8rem;
    padding: 0.25rem 0.4rem;
    border: 1px solid var(--border);
    border-radius: 6px;
    background: #1e293b;
    cursor: pointer;
}
.upload-queue-item .remove-btn {
    cursor: pointer;
    color: var(--danger);
    background: none;
    border: none;
    font-size: 1rem;
    padding: 0.2rem;
    line-height: 1;
}
.upload-queue-item .status-icon { font-size: 0.9rem; width: 1.2rem; text-align: center; }

/* Steps Grid */
.steps-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 1rem;
    margin-bottom: 1.5rem;
}
.step-card {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.25rem;
    box-shadow: var(--shadow);
    transition: all 0.2s;
    position: relative;
}
.step-card:hover { box-shadow: var(--shadow-lg); }
.step-card .step-number {
    position: absolute;
    top: -0.5rem;
    left: -0.5rem;
    width: 2rem;
    height: 2rem;
    background: var(--primary);
    color: #e2e8f0;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.8rem;
    font-weight: 700;
    box-shadow: 0 2px 4px rgba(37,99,235,0.3);
}
.step-card h3 {
    font-size: 0.95rem;
    font-weight: 600;
    margin-bottom: 0.3rem;
    color: var(--text);
    padding-left: 1.5rem;
}
.step-card .step-desc { font-size: 0.8rem; color: var(--text-secondary); margin-bottom: 0.5rem; }
.step-card .step-files-needed { font-size: 0.75rem; color: var(--text-secondary); margin-bottom: 0.75rem; }
.step-card .step-no-upload { font-size: 0.8rem; color: var(--text-secondary); font-style: italic; padding: 0.5rem 0; }

/* File items in step cards */
.step-files-list { margin: 0.5rem 0; }
.file-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.35rem 0.5rem;
    border-radius: 6px;
    background: #1e293b;
    margin-bottom: 0.3rem;
    font-size: 0.82rem;
}
.file-item .file-name { flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.file-item .file-type { font-size: 0.7rem; color: var(--text-secondary); background: #334155; padding: 1px 5px; border-radius: 4px; }

/* Analysis Section */
.analysis-section {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.5rem;
    box-shadow: var(--shadow);
    margin-bottom: 1.5rem;
}
.analysis-section h2 { font-size: 1.1rem; font-weight: 600; margin-bottom: 1rem; display: flex; align-items: center; gap: 0.5rem; }

.symptom-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 1.25rem;
}
.symptom-chip {
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
    padding: 0.4rem 0.75rem;
    border-radius: 999px;
    font-size: 0.8rem;
    font-weight: 500;
    border: 1px solid var(--border);
    cursor: pointer;
    transition: all 0.15s;
    user-select: none;
    background: #1e293b;
}
.symptom-chip:hover { border-color: var(--primary); color: var(--primary); }
.symptom-chip.selected { background: var(--primary-light); border-color: var(--primary); color: var(--primary-dark); }
.symptom-chip input { display: none; }

/* Results */
#results { margin-top: 1.5rem; }
.finding-item {
    padding: 0.75rem 1rem;
    margin-bottom: 0.5rem;
    border-radius: 8px;
    border-left: 4px solid;
    font-size: 0.85rem;
}
.finding-critical { background: var(--danger-bg); border-color: var(--danger); }
.finding-error { background: #fef2f2; border-color: #f87171; }
.finding-warning { background: var(--warning-bg); border-color: var(--warning); }
.finding-info { background: var(--info-bg); border-color: var(--info); }

/* Loading */
#loading {
    display: none;
    text-align: center;
    padding: 2rem;
}
.spinner {
    width: 40px;
    height: 40px;
    border: 4px solid var(--primary-light);
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
    margin: 0 auto 1rem;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* Progress bar */
.progress-bar {
    width: 100%;
    height: 4px;
    background: var(--border);
    border-radius: 2px;
    overflow: hidden;
    margin: 0.5rem 0;
}
.progress-bar .progress-fill {
    height: 100%;
    background: var(--primary);
    border-radius: 2px;
    transition: width 0.3s;
    width: 0%;
}

/* Table */
table {
    width: 100%;
    border-collapse: collapse;
}
th, td {
    padding: 0.75rem;
    text-align: left;
    border-bottom: 1px solid var(--border);
}
th { font-size: 0.75rem; text-transform: uppercase; letter-spacing: 0.05em; color: var(--text-secondary); font-weight: 600; }
tr:hover td { background: #1e293b; }

/* Empty state */
.empty-state {
    text-align: center;
    padding: 3rem 1rem;
    color: var(--text-secondary);
}
.empty-state .icon { font-size: 3rem; margin-bottom: 1rem; }
.empty-state h3 { font-size: 1.1rem; margin-bottom: 0.5rem; color: var(--text); }

/* Report */
.report-content {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 2rem;
    line-height: 1.7;
    box-shadow: var(--shadow);
}
.report-content h1 { font-size: 1.5rem; margin: 1.5rem 0 0.5rem; color: var(--text); }
.report-content h2 { font-size: 1.2rem; margin: 1rem 0 0.5rem; padding-bottom: 0.3rem; border-bottom: 2px solid var(--primary-light); }
.report-content h3 { font-size: 1.05rem; margin: 0.75rem 0 0.5rem; color: var(--primary-dark); }
.report-content ul, .report-content ol { padding-left: 1.5rem; margin: 0.5rem 0; }
.report-content li { margin: 0.3rem 0; }
.report-content strong { color: var(--text); }

/* Toast notification */
.toast {
    position: fixed;
    bottom: 1.5rem;
    right: 1.5rem;
    padding: 0.75rem 1.25rem;
    border-radius: 8px;
    color: #e2e8f0;
    font-size: 0.85rem;
    font-weight: 500;
    box-shadow: var(--shadow-lg);
    z-index: 1000;
    transform: translateY(100px);
    opacity: 0;
    transition: all 0.3s;
}
.toast.show { transform: translateY(0); opacity: 1; }
.toast-success { background: var(--success); }
.toast-error { background: var(--danger); }
.toast-info { background: var(--primary); }

/* Responsive */
@media (max-width: 768px) {
    .container { padding: 1rem; }
    header { flex-direction: column; align-items: flex-start; gap: 0.75rem; }
    .steps-grid { grid-template-columns: 1fr; }
    .info-grid { grid-template-columns: 1fr 1fr; }
    .upload-bar { flex-direction: column; align-items: stretch; }
    .symptom-grid { gap: 0.4rem; }
}

/* ── Chart & Content styles ── */
.btn-icon {
    background:none;
    border:none;
    font-size:0.8rem;
    cursor:pointer;
    padding:0.1rem 0.2rem;
    border-radius:3px;
    line-height:1;
    transition:background 0.15s;
}
.btn-icon:hover { background:#f1f5f9; }

.chart-tab {
    padding:0.25rem 0.6rem;
    font-size:0.75rem;
    border:1px solid #e2e8f0;
    border-radius:4px;
    background:#f8fafc;
    color:#475569;
    cursor:pointer;
    transition:all 0.15s;
}
.chart-tab:hover { background:var(--border); }
.chart-tab.active {
    background:#2563eb;
    color:#fff;
    border-color:#2563eb;
}

.file-raw-content {
    font-family:'SFMono-Regular',Consolas,'Liberation Mono',Menlo,monospace;
    font-size:0.65rem;
    line-height:1.3;
}
.file-raw-content::-webkit-scrollbar { height:4px; }
.file-raw-content::-webkit-scrollbar-thumb { background:#cbd5e1; border-radius:2px; }

/* Chart in report */
.report-chart { margin:0.5rem 0; }
.report-chart .js-plotly-plot .plot-container { border:1px solid #e2e8f0; border-radius:6px; }