/* ============================================
   Platform Performance Page — Styles
   Used by: engineering/platform.html
   ============================================ */

/* Page Header
–––––––––––––––––––––––––––––––––––––––––––––––––– */
.eng-page-header {
    margin-bottom: 48px;
}

.eng-status-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 12px;
    font-weight: 500;
    color: var(--eng-green);
    background: var(--eng-green-subtle);
    padding: 5px 14px 5px 10px;
    border-radius: 20px;
    border: 1px solid rgba(16, 185, 129, 0.15);
    margin-bottom: 24px;
    letter-spacing: 0.2px;
}

.eng-status-dot {
    width: 7px;
    height: 7px;
    background: var(--eng-green);
    border-radius: 50%;
    animation: eng-pulse 2s ease-in-out infinite;
}

@keyframes eng-pulse {
    0%, 100% { opacity: 1; box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.4); }
    50% { opacity: 0.8; box-shadow: 0 0 0 4px rgba(16, 185, 129, 0); }
}

.eng-page-title {
    font-size: 36px;
    font-weight: 650;
    color: var(--eng-text);
    letter-spacing: -0.8px;
    line-height: 1.15;
    margin-bottom: 10px;
}

.eng-page-subtitle {
    font-size: 15px;
    color: var(--eng-text-secondary);
    line-height: 1.5;
    max-width: 520px;
}

/* Metric Cards
–––––––––––––––––––––––––––––––––––––––––––––––––– */
.eng-metrics-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 16px;
    margin-bottom: 56px;
}

.eng-metric-card {
    background: var(--eng-surface);
    border: 1px solid var(--eng-border);
    border-radius: var(--eng-radius);
    padding: 24px 24px 16px;
    transition: border-color 0.2s ease, background-color 0.2s ease, box-shadow 0.3s ease;
    position: relative;
    overflow: hidden;
}

.eng-metric-card:hover {
    border-color: var(--eng-border-strong);
    background: var(--eng-surface-hover);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.15);
}

/* Colored accent glow at top of each card */
.eng-metric-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.eng-metric-card:hover::before {
    opacity: 1;
}

.eng-card-blue::before { background: linear-gradient(90deg, transparent, var(--eng-blue), transparent); }
.eng-card-green::before { background: linear-gradient(90deg, transparent, var(--eng-green), transparent); }
.eng-card-cyan::before { background: linear-gradient(90deg, transparent, var(--eng-cyan), transparent); }
.eng-card-purple::before { background: linear-gradient(90deg, transparent, var(--eng-purple), transparent); }

.eng-metric-label {
    font-size: 11px;
    font-weight: 600;
    color: var(--eng-text-muted);
    text-transform: uppercase;
    letter-spacing: 1.2px;
    margin-bottom: 12px;
}

.eng-metric-value {
    font-family: var(--eng-mono);
    font-size: 32px;
    font-weight: 600;
    color: var(--eng-text);
    letter-spacing: -1px;
    line-height: 1;
    margin-bottom: 4px;
    transition: color 0.3s ease;
}

.eng-metric-value.eng-loading {
    color: var(--eng-text-muted);
}

.eng-metric-value.eng-green-val,
.eng-card-green .eng-metric-value {
    color: var(--eng-green);
}

.eng-card-green-val .eng-metric-value {
    color: var(--eng-green);
}

.eng-metric-unit {
    font-size: 12px;
    font-weight: 500;
    color: var(--eng-text-muted);
    font-family: var(--eng-mono);
    letter-spacing: 0.5px;
}

/* Sparklines in metric cards */
.eng-metric-spark {
    margin-top: 12px;
    height: 28px;
    opacity: 0.65;
    transition: opacity 0.2s ease;
}

.eng-metric-card:hover .eng-metric-spark {
    opacity: 1;
}

.eng-sparkline-svg {
    width: 100%;
    height: 100%;
    display: block;
}

/* Sections
–––––––––––––––––––––––––––––––––––––––––––––––––– */
.eng-section {
    margin-bottom: 56px;
}

.eng-section-header {
    margin-bottom: 24px;
}

.eng-section-title {
    font-size: 16px;
    font-weight: 600;
    color: var(--eng-text);
    letter-spacing: -0.2px;
    margin-bottom: 4px;
}

.eng-section-title-row {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 4px;
}

.eng-section-title-row .eng-section-title {
    margin-bottom: 0;
}

.eng-section-subtitle {
    font-size: 13px;
    color: var(--eng-text-muted);
}

/* LIVE Badge */
.eng-live-badge {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    font-size: 10px;
    font-weight: 700;
    color: var(--eng-green);
    background: var(--eng-green-subtle);
    padding: 3px 10px 3px 8px;
    border-radius: 10px;
    border: 1px solid rgba(16, 185, 129, 0.15);
    letter-spacing: 1px;
    text-transform: uppercase;
}

.eng-live-badge.eng-active {
    animation: eng-live-pulse 1.5s ease-in-out infinite;
}

@keyframes eng-live-pulse {
    0%, 100% { border-color: rgba(16, 185, 129, 0.15); }
    50% { border-color: rgba(16, 185, 129, 0.4); box-shadow: 0 0 12px rgba(16, 185, 129, 0.15); }
}

.eng-live-dot {
    width: 6px;
    height: 6px;
    background: var(--eng-green);
    border-radius: 50%;
    animation: eng-pulse 2s ease-in-out infinite;
}

/* Latency Chart
–––––––––––––––––––––––––––––––––––––––––––––––––– */
.eng-chart-container {
    background: var(--eng-surface);
    border: 1px solid var(--eng-border);
    border-radius: var(--eng-radius);
    padding: 28px 24px 20px;
    overflow: hidden;
}

.eng-chart-svg {
    width: 100%;
    height: auto;
    display: block;
}

.eng-chart-grid-line {
    stroke: var(--eng-border);
    stroke-width: 1;
}

.eng-chart-axis-label {
    fill: var(--eng-text-muted);
    font-family: var(--eng-mono);
    font-size: 10px;
    font-weight: 500;
}

.eng-chart-month-label {
    fill: var(--eng-text-muted);
    font-family: 'Inter', sans-serif;
    font-size: 11px;
    font-weight: 450;
}

.eng-chart-line {
    fill: none;
    stroke: var(--eng-blue);
    stroke-width: 2;
    stroke-linecap: round;
    stroke-linejoin: round;
}

/* Animated line draw */
.eng-chart-line-animated {
    stroke-dasharray: 2000;
    stroke-dashoffset: 2000;
}

.eng-chart-area {
    opacity: 1;
}

.eng-chart-dot {
    fill: var(--eng-blue);
    stroke: var(--eng-bg);
    stroke-width: 2.5;
    cursor: pointer;
    transition: r 0.15s ease;
}

.eng-chart-dot:hover {
    r: 6;
}

.eng-chart-dot.eng-current {
    fill: #60a5fa;
    stroke: var(--eng-bg);
    stroke-width: 3;
    filter: drop-shadow(0 0 6px rgba(59, 130, 246, 0.4));
}

.eng-chart-tooltip {
    pointer-events: none;
    opacity: 0;
    transition: opacity 0.15s ease;
}

.eng-chart-tooltip.eng-visible {
    opacity: 1;
}

.eng-chart-tooltip-bg {
    fill: #1a1f35;
    stroke: var(--eng-border-strong);
    stroke-width: 1;
    rx: 6;
}

.eng-chart-tooltip-text {
    fill: var(--eng-text);
    font-family: var(--eng-mono);
    font-size: 12px;
    font-weight: 500;
}

.eng-chart-tooltip-label {
    fill: var(--eng-text-muted);
    font-family: 'Inter', sans-serif;
    font-size: 10px;
}

/* Uptime Timeline — 90-day dot grid
–––––––––––––––––––––––––––––––––––––––––––––––––– */
.eng-uptime-container {
    background: var(--eng-surface);
    border: 1px solid var(--eng-border);
    border-radius: var(--eng-radius);
    padding: 28px 24px;
    position: relative;
}

.eng-uptime-tooltip {
    position: absolute;
    top: -8px;
    transform: translateX(-50%) translateY(-100%);
    background: #151a2e;
    border: 1px solid var(--eng-border-strong);
    color: var(--eng-text);
    font-size: 12px;
    line-height: 1.5;
    padding: 8px 12px;
    border-radius: 8px;
    white-space: nowrap;
    pointer-events: none;
    opacity: 0;
    transition: opacity 0.12s ease;
    z-index: 20;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.4);
}

.eng-uptime-tooltip strong {
    font-weight: 600;
    color: var(--eng-text);
}

.eng-uptime-tooltip.eng-visible {
    opacity: 1;
}

.eng-uptime-track {
    display: flex;
    gap: 2px;
    height: 34px;
}

.eng-uptime-day {
    flex: 1;
    border-radius: 3px;
    cursor: pointer;
    transition: opacity 0.12s ease, transform 0.12s ease, box-shadow 0.12s ease;
    min-width: 0;
}

.eng-uptime-day:hover {
    transform: scaleY(1.2);
    z-index: 2;
    position: relative;
}

/* Staggered entrance */
.eng-uptime-stagger {
    animation: eng-uptimeFadeIn 0.3s ease forwards;
    opacity: 0;
    transform: scaleY(0);
    transform-origin: bottom;
}

@keyframes eng-uptimeFadeIn {
    from { opacity: 0; transform: scaleY(0); }
    to { opacity: 1; transform: scaleY(1); }
}

/* Uptime color grades — override opacity after stagger animation */
.eng-uptime-day.eng-perfect {
    background: var(--eng-green);
}

.eng-uptime-stagger.eng-perfect {
    animation: eng-uptimeFadeIn 0.3s ease forwards;
}

.eng-uptime-day.eng-good {
    background: var(--eng-green);
}

.eng-uptime-stagger.eng-good {
    animation: eng-uptimeGood 0.3s ease forwards;
}

@keyframes eng-uptimeGood {
    from { opacity: 0; transform: scaleY(0); }
    to { opacity: 0.65; transform: scaleY(1); }
}

.eng-uptime-day.eng-good:hover {
    opacity: 0.9;
}

.eng-uptime-day.eng-minor {
    background: var(--eng-amber);
}

.eng-uptime-stagger.eng-minor {
    animation: eng-uptimeMinor 0.3s ease forwards;
}

@keyframes eng-uptimeMinor {
    from { opacity: 0; transform: scaleY(0); }
    to { opacity: 0.7; transform: scaleY(1); }
}

.eng-uptime-day.eng-minor:hover {
    opacity: 1;
}

.eng-uptime-day.eng-degraded {
    background: var(--eng-amber);
}

.eng-uptime-stagger.eng-degraded {
    animation: eng-uptimeDegraded 0.3s ease forwards;
}

@keyframes eng-uptimeDegraded {
    from { opacity: 0; transform: scaleY(0); }
    to { opacity: 0.9; transform: scaleY(1); }
}

.eng-uptime-day.eng-degraded:hover {
    opacity: 1;
}

.eng-uptime-day.eng-today {
    box-shadow: 0 0 8px rgba(16, 185, 129, 0.35);
}

.eng-uptime-months {
    display: flex;
    margin-top: 8px;
    gap: 2px;
}

.eng-uptime-month-label {
    font-size: 11px;
    color: var(--eng-text-muted);
    font-weight: 450;
    padding-left: 1px;
    min-width: 0;
    overflow: hidden;
}

.eng-uptime-summary {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-top: 20px;
    padding-top: 16px;
    border-top: 1px solid var(--eng-border);
    font-size: 13px;
}

.eng-uptime-summary-label {
    color: var(--eng-text-muted);
}

.eng-uptime-summary-value {
    font-family: var(--eng-mono);
    font-weight: 600;
    color: var(--eng-green);
    font-size: 14px;
}

/* Live Test Section
–––––––––––––––––––––––––––––––––––––––––––––––––– */
.eng-live-test {
    background: var(--eng-surface);
    border: 1px solid var(--eng-border);
    border-radius: var(--eng-radius);
    padding: 28px 28px;
    position: relative;
    overflow: hidden;
}

.eng-live-test::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--eng-blue), transparent);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.eng-live-test.eng-testing::before {
    opacity: 1;
    animation: eng-scan 1.5s ease-in-out infinite;
}

@keyframes eng-scan {
    0% { transform: translateX(-100%); }
    100% { transform: translateX(100%); }
}

.eng-test-status {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 20px;
    font-size: 13px;
    font-weight: 500;
}

.eng-test-status-icon {
    width: 20px;
    height: 20px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 11px;
    flex-shrink: 0;
}

.eng-test-status-icon.eng-pending {
    background: var(--eng-blue-subtle);
    color: var(--eng-blue);
    animation: eng-spinner 1s linear infinite;
}

.eng-test-status-icon.eng-success {
    background: var(--eng-green-subtle);
    color: var(--eng-green);
}

.eng-test-status-icon.eng-error {
    background: rgba(239, 68, 68, 0.1);
    color: var(--eng-red);
}

@keyframes eng-spinner {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

.eng-test-url {
    font-family: var(--eng-mono);
    font-size: 12px;
    color: var(--eng-text-muted);
    margin-bottom: 20px;
    padding: 8px 12px;
    background: rgba(0, 0, 0, 0.2);
    border-radius: var(--eng-radius-xs);
    border: 1px solid var(--eng-border);
    display: flex;
    align-items: center;
    gap: 8px;
}

.eng-test-url-method {
    color: var(--eng-green);
    font-weight: 600;
    font-size: 11px;
}

.eng-test-url-path {
    color: var(--eng-text-secondary);
}

.eng-test-results {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1px;
    background: var(--eng-border);
    border-radius: var(--eng-radius-sm);
    overflow: hidden;
}

.eng-test-result-item {
    background: rgba(0, 0, 0, 0.15);
    padding: 16px 18px;
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.eng-test-result-label {
    font-size: 10px;
    font-weight: 600;
    color: var(--eng-text-muted);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.eng-test-result-value {
    font-family: var(--eng-mono);
    font-size: 18px;
    font-weight: 600;
    color: var(--eng-text);
    letter-spacing: -0.5px;
}

.eng-test-result-value .eng-highlight {
    color: var(--eng-green);
}

.eng-test-result-unit {
    font-size: 12px;
    font-weight: 400;
    color: var(--eng-text-muted);
    margin-left: 2px;
}

/* Waterfall timing */
.eng-test-waterfall {
    margin-top: 20px;
    padding-top: 16px;
    border-top: 1px solid var(--eng-border);
}

.eng-test-waterfall-title {
    font-size: 11px;
    font-weight: 600;
    color: var(--eng-text-muted);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 12px;
}

.eng-waterfall-row {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 6px;
    font-size: 12px;
}

.eng-waterfall-label {
    width: 65px;
    color: var(--eng-text-muted);
    font-weight: 500;
    flex-shrink: 0;
    font-family: var(--eng-mono);
    font-size: 11px;
}

.eng-waterfall-bar-container {
    flex: 1;
    height: 6px;
    background: rgba(255, 255, 255, 0.03);
    border-radius: 3px;
    overflow: hidden;
    position: relative;
}

.eng-waterfall-bar {
    height: 100%;
    border-radius: 3px;
    position: absolute;
    top: 0;
    transition: width 0.5s ease;
}

.eng-waterfall-bar.eng-dns { background: var(--eng-cyan); }
.eng-waterfall-bar.eng-tcp { background: var(--eng-purple); }
.eng-waterfall-bar.eng-tls { background: var(--eng-amber); }
.eng-waterfall-bar.eng-ttfb { background: var(--eng-blue); }
.eng-waterfall-bar.eng-download { background: var(--eng-green); }

.eng-waterfall-time {
    width: 50px;
    text-align: right;
    color: var(--eng-text-secondary);
    font-family: var(--eng-mono);
    font-size: 11px;
    flex-shrink: 0;
}

/* Test footer — retest + meta info */
.eng-test-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-top: 20px;
    gap: 16px;
}

.eng-retest-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 16px;
    font-size: 12px;
    font-weight: 500;
    color: var(--eng-text-secondary);
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid var(--eng-border);
    border-radius: var(--eng-radius-xs);
    cursor: pointer;
    transition: all 0.15s ease;
    font-family: 'Inter', sans-serif;
}

.eng-retest-btn:hover {
    color: var(--eng-text);
    background: rgba(255, 255, 255, 0.07);
    border-color: var(--eng-border-strong);
}

.eng-retest-btn:active {
    transform: scale(0.98);
}

.eng-test-meta {
    display: flex;
    align-items: center;
    gap: 16px;
    font-size: 11px;
    color: var(--eng-text-muted);
    font-family: var(--eng-mono);
}

.eng-test-timestamp {
    opacity: 0.7;
}

.eng-test-auto {
    opacity: 0.5;
}

/* Script Footprint
–––––––––––––––––––––––––––––––––––––––––––––––––– */
.eng-footprint {
    background: var(--eng-surface);
    border: 1px solid var(--eng-border);
    border-radius: var(--eng-radius);
    padding: 32px 28px;
}

.eng-footprint-hero {
    display: flex;
    align-items: center;
    gap: 28px;
    margin-bottom: 32px;
    padding-bottom: 24px;
    border-bottom: 1px solid var(--eng-border);
}

/* Circular gauge */
.eng-footprint-gauge-wrap {
    position: relative;
    width: 120px;
    height: 120px;
    flex-shrink: 0;
}

.eng-footprint-gauge {
    width: 100%;
    height: 100%;
    transform: rotate(-90deg);
}

.eng-gauge-bg {
    fill: none;
    stroke: rgba(255, 255, 255, 0.03);
    stroke-width: 10;
}

.eng-gauge-track {
    fill: none;
    stroke: rgba(255, 255, 255, 0.04);
    stroke-width: 10;
    stroke-linecap: round;
}

.eng-gauge-fill {
    fill: none;
    stroke: var(--eng-green);
    stroke-width: 10;
    stroke-linecap: round;
    stroke-dasharray: 364.4;
    stroke-dashoffset: 364.4;
    filter: drop-shadow(0 0 6px rgba(16, 185, 129, 0.3));
}

.eng-footprint-gauge-label {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    line-height: 1;
}

.eng-footprint-size {
    font-family: var(--eng-mono);
    font-size: 28px;
    font-weight: 700;
    color: var(--eng-green);
    letter-spacing: -1.5px;
}

.eng-footprint-size-unit {
    font-family: var(--eng-mono);
    font-size: 11px;
    font-weight: 500;
    color: var(--eng-green-dim);
    margin-top: 2px;
}

.eng-footprint-hero-text {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.eng-footprint-size-label {
    font-size: 14px;
    font-weight: 550;
    color: var(--eng-text);
}

.eng-footprint-size-context {
    font-size: 13px;
    color: var(--eng-text-muted);
    line-height: 1.5;
}

/* Comparison bars */
.eng-footprint-bars {
    display: flex;
    flex-direction: column;
    gap: 18px;
}

.eng-footprint-row-label {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 7px;
}

.eng-footprint-name {
    font-size: 13px;
    font-weight: 450;
    color: var(--eng-text-secondary);
}

.eng-footprint-name.eng-footprint-highlight {
    color: var(--eng-text);
    font-weight: 550;
}

.eng-footprint-value {
    font-family: var(--eng-mono);
    font-size: 12px;
    font-weight: 500;
    color: var(--eng-text-muted);
}

.eng-footprint-value.eng-footprint-highlight {
    color: var(--eng-green);
}

.eng-footprint-track {
    height: 8px;
    background: rgba(255, 255, 255, 0.03);
    border-radius: 4px;
    overflow: hidden;
    position: relative;
}

.eng-footprint-fill {
    height: 100%;
    border-radius: 4px;
    position: absolute;
    top: 0;
    left: 0;
    width: 0%;
    transition: width 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

.eng-footprint-fill-accent {
    background: linear-gradient(90deg, var(--eng-green), #34d399);
    box-shadow: 0 0 12px rgba(16, 185, 129, 0.2);
}

.eng-footprint-fill-muted {
    background: rgba(255, 255, 255, 0.08);
}

.eng-footprint-note {
    margin-top: 24px;
    padding-top: 20px;
    border-top: 1px solid var(--eng-border);
}

.eng-footprint-note p {
    font-size: 13px;
    color: var(--eng-text-muted);
    line-height: 1.65;
    margin: 0;
    max-width: 600px;
}

/* Divider
–––––––––––––––––––––––––––––––––––––––––––––––––– */
.eng-divider {
    height: 1px;
    background: var(--eng-border);
    margin: 56px 0;
}

/* Platform-specific Responsive
–––––––––––––––––––––––––––––––––––––––––––––––––– */
@media (max-width: 900px) {
    .eng-metrics-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .eng-test-results {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .eng-page-title {
        font-size: 28px;
    }

    .eng-metric-value {
        font-size: 26px;
    }

    .eng-uptime-track {
        height: 26px;
    }

    .eng-uptime-month-label {
        font-size: 9px;
    }

    .eng-footprint-hero {
        flex-direction: column;
        align-items: flex-start;
        gap: 20px;
    }

    .eng-footprint-gauge-wrap {
        width: 100px;
        height: 100px;
    }

    .eng-footprint-size {
        font-size: 24px;
    }

    .eng-test-footer {
        flex-direction: column;
        align-items: flex-start;
        gap: 12px;
    }
}

@media (max-width: 480px) {
    .eng-metrics-grid {
        grid-template-columns: 1fr;
    }

    .eng-test-results {
        grid-template-columns: 1fr;
    }

    .eng-page-title {
        font-size: 24px;
    }

    .eng-metric-value {
        font-size: 24px;
    }

    .eng-uptime-track {
        height: 22px;
        gap: 1px;
    }

    .eng-uptime-month-label {
        font-size: 8px;
    }

    .eng-footprint-gauge-wrap {
        width: 80px;
        height: 80px;
    }

    .eng-footprint-size {
        font-size: 20px;
    }

    .eng-footprint {
        padding: 24px 20px;
    }
}