.mode-tabs {
    display: flex;
    gap: 0;
    margin-bottom: 1rem;
    border-radius: var(--radius);
    overflow: hidden;
    border: 1px solid var(--color-border);
}

.mode-tab {
    flex: 1;
    padding: 0.65rem 1rem;
    border: none;
    background: var(--color-bg-secondary);
    color: var(--color-text);
    font-size: 0.95rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
}

.mode-tab:not(:last-child) {
    border-right: 1px solid var(--color-border);
}

.mode-tab:hover {
    background: var(--color-bg-tertiary);
}

.mode-tab.active {
    background: var(--color-primary);
    color: white;
}

.mode-content {
    margin-bottom: 1rem;
}

.mode-description {
    font-size: 0.9rem;
    color: var(--color-text-muted);
    margin: 0 0 0.75rem;
}

#url-row {
    display: flex;
}

.url-input {
    width: 100%;
    padding: 0.65rem 0.875rem;
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    font-size: 0.95rem;
    background: var(--color-bg-secondary);
    color: var(--color-text);
    font-family: inherit;
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.url-input:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(var(--color-primary-rgb), 0.1);
}

.url-input:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.controls {
    display: flex;
    gap: 0.75rem;
    flex-wrap: wrap;
    margin-top: 1rem;
}

#summary {
    margin: 1rem 0 0;
    font-size: 0.95rem;
    color: var(--color-text-muted);
    min-height: 1.4em;
    font-weight: 500;
}

#speed-result-card {
    display: none;
}

#speed-result-card.visible {
    display: block;
}

#ping-log {
    margin-top: 1rem;
    max-height: 360px;
    overflow-y: auto;
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
}

#ping-log:empty {
    display: none;
}

.stat-label {
    font-size: 0.85rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-text-muted);
    margin: 0 0 0.25rem;
}

.stat-value {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--color-primary);
    margin: 0;
    line-height: 1;
}

.stat-unit {
    font-size: 1rem;
    font-weight: 400;
    color: var(--color-text-muted);
}

.ping-row {
    display: grid;
    grid-template-columns: 3rem 4.5rem 1fr 1.5rem 1.25rem;
    align-items: center;
    padding: 0.5rem 0.75rem;
    font-size: 0.9rem;
    border-bottom: 1px solid var(--color-border);
    gap: 0.5rem;
}

.ping-row:last-child {
    border-bottom: none;
}

.ping-row.has-breakdown {
    cursor: pointer;
}

.ping-row.has-breakdown:hover {
    background: var(--color-bg);
}

.ping-row.has-breakdown:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: -2px;
}

.ping-ok {
    background: #fff;
}

.ping-drop {
    background: #fff5f5;
}

.ping-num {
    color: var(--color-text-muted);
    font-size: 0.8rem;
}

.ping-ms {
    color: var(--color-text);
}

.ping-dot {
    text-align: right;
    font-size: 0.85rem;
}

.ping-lost {
    color: #7c2d12;
}

.ping-drop .ping-speed {
    color: #dc2626;
    font-weight: 600;
}

.ping-speed {
    color: var(--color-text-muted);
    font-size: 0.85rem;
}

.ping-chevron {
    text-align: center;
    color: var(--color-text-muted);
    font-size: 0.75rem;
    transition: transform 0.15s ease;
}

.ping-row.expanded .ping-chevron {
    transform: rotate(90deg);
}

.ping-breakdown {
    grid-column: 1 / -1;
    margin-top: 0.5rem;
    padding-top: 0.5rem;
    border-top: 1px dashed var(--color-border);
}

.breakdown-dl {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: 0.35rem 1rem;
    margin: 0;
}

.breakdown-row {
    display: flex;
    justify-content: space-between;
    gap: 0.5rem;
    font-size: 0.82rem;
}

.breakdown-row dt {
    color: var(--color-text-muted);
}

.breakdown-row dd {
    margin: 0;
    font-weight: 600;
    color: var(--color-text);
}

.breakdown-row.breakdown-total {
    grid-column: 1 / -1;
    border-top: 1px solid var(--color-border);
    padding-top: 0.35rem;
    margin-top: 0.15rem;
}

.section-separator {
    border: 0;
    border-top: 1px solid var(--color-border);
    margin: 1.5rem 0 2rem;
}

.faq-item summary {
    cursor: pointer;
    font-weight: 600;
}

.faq-item + .faq-item {
    margin-top: 0.75rem;
}

@media (max-width: 480px) {
    .ping-row {
        grid-template-columns: 2.5rem 4rem 1fr 1.1rem 1.1rem;
        padding: 0.45rem 0.6rem;
    }
}

/* Latency legend */

.latency-legend {
    display: flex;
    flex-wrap: wrap;
    gap: 0.35rem 1rem;
    padding: 0.6rem 0.75rem;
    border-bottom: 1px solid var(--color-border);
    font-size: 0.8rem;
    color: var(--color-text-muted);
}

.latency-legend:empty {
    display: none;
}

.legend-item {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
}

.legend-dot {
    width: 0.6rem;
    height: 0.6rem;
    border-radius: 50%;
    display: inline-block;
}

.legend-loss-icon {
    color: #7c2d12;
    font-size: 0.75rem;
}

.legend-caption {
    font-size: 0.8rem;
    color: var(--color-text-muted);
    margin: 0.5rem 0 0;
}

/* Summary badges */

.badge {
    display: inline-block;
    padding: 0.1rem 0.55rem;
    border-radius: 999px;
    font-size: 0.8rem;
    font-weight: 600;
    margin-left: 0.4rem;
    border: 1px solid currentColor;
    white-space: nowrap;
}

.badge-loss.loss-none {
    color: #16a34a;
}

.badge-loss.loss-low {
    color: #d97706;
}

.badge-loss.loss-high {
    color: #dc2626;
}

/* Average latency breakdown card */

.breakdown-bars {
    display: flex;
    width: 100%;
    height: 0.9rem;
    border-radius: 999px;
    overflow: hidden;
    margin: 0.5rem 0 0.75rem;
    background: var(--color-border);
}

.breakdown-seg {
    height: 100%;
}

.seg-dns { background: #93c5fd; }
.seg-tcp { background: var(--color-primary); }
.seg-tls { background: #1e3a8a; }
.seg-ttfb { background: var(--color-accent); }
.seg-download { background: #9ca3af; }

.breakdown-list {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    flex-wrap: wrap;
    gap: 0.4rem 1.25rem;
    font-size: 0.85rem;
}

.breakdown-list li {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    color: var(--color-text-muted);
}

.seg-swatch {
    width: 0.6rem;
    height: 0.6rem;
    border-radius: 2px;
    display: inline-block;
}

.seg-ms {
    color: var(--color-text);
    font-weight: 600;
}

.breakdown-total-item {
    font-weight: 600;
}

/* Report export */

.report-actions {
    display: flex;
    gap: 0.6rem;
    flex-wrap: wrap;
    margin: 0.75rem 0;
}

.button-secondary {
    background: transparent;
    color: var(--color-primary);
    border: 1px solid var(--color-border);
}

.button-secondary:hover {
    background: var(--color-bg);
    border-color: var(--color-primary);
}

.button-secondary:active {
    background: var(--color-border);
}

.button-secondary:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.mode-note {
    font-size: 0.85rem;
    color: var(--color-text-muted);
    margin: 0.5rem 0 0;
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* Print / PDF export */

.print-only {
    display: none;
}

@media print {
    body * {
        visibility: hidden;
    }

    #print-report,
    #print-report * {
        visibility: visible;
    }

    #print-report {
        display: block;
        position: absolute;
        top: 0;
        left: 0;
        width: 100%;
    }

    .print-pre {
        white-space: pre-wrap;
        word-break: break-word;
        font-family: 'Courier New', Courier, monospace;
        font-size: 11px;
        line-height: 1.4;
        color: #000;
    }
}