/* ================================================
   Device Test Page Styles
   ================================================ */

:root {
    --dt-ink: #0f172a;
    --dt-body: #334155;
    --dt-muted: #64748b;
    --dt-faint: #94a3b8;
    --dt-surface: #f8fafc;
    --dt-card: #ffffff;
    --dt-border: #e2e8f0;
    --dt-teal-50: #f0fdfa;
    --dt-teal-600: #0d9488;
    --dt-teal-700: #0f766e;
    --dt-teal-800: #115e59;
    --dt-green: #10b981;
    --dt-red: #ef4444;
    --dt-amber: #f59e0b;
}

* { box-sizing: border-box; }

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    color: var(--dt-body);
    background: var(--dt-surface);
    margin: 0;
    -webkit-font-smoothing: antialiased;
}

.dt-w { max-width: 720px; margin: 0 auto; padding: 0 1.25rem; }

/* Nav */
.dt-nav {
    background: #fff;
    border-bottom: 1px solid var(--dt-border);
    padding: .65rem 0;
}
.dt-nav .dt-w { max-width: 1140px; }
.dt-nav-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
}
.dt-brand {
    display: flex; align-items: center; gap: .45rem;
    text-decoration: none; color: var(--dt-ink); font-weight: 700; font-size: 1.05rem;
}
.dt-brand-mark {
    width: 32px; height: 32px; border-radius: 9px;
    object-fit: contain;
}
.dt-back-link {
    color: var(--dt-muted); text-decoration: none; font-size: .88rem; font-weight: 500;
}
.dt-back-link:hover { color: var(--dt-teal-700); }

/* Main */
.dt-main { padding: 2rem 0 4rem; }

.dt-header { text-align: center; margin-bottom: 1.5rem; }
.dt-title {
    font-size: 1.6rem; font-weight: 800; color: var(--dt-ink); margin: 0 0 .4rem;
    display: flex; align-items: center; justify-content: center; gap: .5rem;
}
.dt-subtitle { font-size: .92rem; color: var(--dt-muted); margin: 0; max-width: 540px; margin-inline: auto; line-height: 1.5; }

/* Progress */
.dt-progress { margin-bottom: 1.5rem; }
.dt-progress-track {
    height: 4px; background: var(--dt-border); border-radius: 2px;
    margin-bottom: .6rem; overflow: hidden;
}
.dt-progress-fill {
    height: 100%; width: 0%; background: var(--dt-teal-600);
    border-radius: 2px; transition: width .4s ease;
}
.dt-progress-steps { display: flex; justify-content: space-between; }
.dt-progress-step {
    background: none; border: none; cursor: pointer; display: flex; flex-direction: column;
    align-items: center; gap: .25rem; padding: 0; flex: 1;
}
.dt-step-dot {
    width: 10px; height: 10px; border-radius: 50%;
    background: var(--dt-border); border: 2px solid var(--dt-border);
    transition: background .3s, border-color .3s;
}
.dt-progress-step.active .dt-step-dot { background: var(--dt-teal-600); border-color: var(--dt-teal-600); }
.dt-progress-step.done .dt-step-dot { background: var(--dt-green); border-color: var(--dt-green); }
.dt-progress-step.fail .dt-step-dot { background: var(--dt-red); border-color: var(--dt-red); }
.dt-step-label { font-size: .72rem; font-weight: 600; color: var(--dt-faint); }
.dt-progress-step.active .dt-step-label { color: var(--dt-teal-700); }
.dt-progress-step.done .dt-step-label,
.dt-progress-step.fail .dt-step-label { color: var(--dt-body); }

/* Step panels */
.dt-step-panel { display: none; }
.dt-step-panel.active { display: block; animation: dt-fadeIn .3s ease; }
@keyframes dt-fadeIn { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: none; } }

.dt-panel-card {
    background: var(--dt-card); border: 1px solid var(--dt-border); border-radius: 14px;
    padding: 1.6rem; box-shadow: 0 4px 16px rgba(15,23,42,.05);
}
.dt-panel-header { display: flex; align-items: flex-start; gap: .8rem; margin-bottom: 1.2rem; }
.dt-panel-icon {
    width: 44px; height: 44px; border-radius: 10px; flex-shrink: 0;
    display: grid; place-items: center; color: #fff; font-size: 1.1rem;
}
.dt-panel-title { font-size: 1.15rem; font-weight: 700; color: var(--dt-ink); margin: 0 0 .15rem; }
.dt-panel-desc { font-size: .88rem; color: var(--dt-muted); margin: 0; line-height: 1.45; }

/* Device select */
.dt-device-select { margin-bottom: 1rem; }
.dt-device-select label {
    display: block; font-size: .78rem; font-weight: 600; color: var(--dt-muted);
    text-transform: uppercase; letter-spacing: .04em; margin-bottom: .3rem;
}
.dt-select {
    width: 100%; padding: .5rem .7rem; border: 1px solid var(--dt-border);
    border-radius: 8px; font-size: .88rem; color: var(--dt-ink);
    background: #fff; appearance: auto;
}
.dt-select:focus { outline: none; border-color: var(--dt-teal-600); box-shadow: 0 0 0 3px rgba(13,148,136,.1); }

/* Video preview */
.dt-video-wrap {
    position: relative; width: 100%; aspect-ratio: 16/9;
    border-radius: 10px; overflow: hidden; background: #111827;
    margin-bottom: 1rem;
}
.dt-video-wrap video {
    width: 100%; height: 100%; object-fit: cover; display: block;
    transform: scaleX(-1);
}
.dt-video-placeholder {
    position: absolute; inset: 0; display: flex; flex-direction: column;
    align-items: center; justify-content: center; color: #6b7280; gap: .4rem;
}
.dt-video-placeholder i { font-size: 2rem; opacity: .5; }
.dt-video-placeholder p { font-size: .85rem; margin: 0; }
.dt-video-placeholder.hidden { display: none; }

/* Mic meter */
.dt-meter-wrap {
    display: flex; align-items: center; gap: .6rem; margin-bottom: 1rem;
    padding: .6rem .8rem; background: var(--dt-surface); border-radius: 8px;
}
.dt-meter-label { font-size: .78rem; font-weight: 600; color: var(--dt-muted); white-space: nowrap; }
.dt-meter {
    flex: 1; height: 10px; background: var(--dt-border);
    border-radius: 5px; overflow: hidden;
}
.dt-meter-fill {
    height: 100%; width: 0%; border-radius: 5px;
    background: linear-gradient(90deg, var(--dt-green), #34d399);
    transition: width .08s ease;
}
.dt-meter-value { font-size: .78rem; font-weight: 600; color: var(--dt-muted); width: 2.5rem; text-align: right; }

/* Speaker test */
.dt-speaker-test {
    display: flex; align-items: center; gap: 1rem;
    margin-bottom: 1rem; padding: .8rem; background: var(--dt-surface); border-radius: 8px;
}
.dt-btn-tone {
    background: linear-gradient(135deg, #0369a1, #38bdf8); color: #fff;
    border: none; border-radius: 8px; padding: .55rem 1.2rem;
    font-weight: 600; font-size: .88rem; cursor: pointer;
    display: inline-flex; align-items: center; gap: .35rem;
    transition: transform .15s;
}
.dt-btn-tone:hover { transform: translateY(-1px); }
.dt-btn-tone:disabled { opacity: .5; cursor: not-allowed; transform: none; }
.dt-speaker-anim {
    display: flex; align-items: flex-end; gap: 3px; height: 24px; opacity: 0;
    transition: opacity .3s;
}
.dt-speaker-anim.playing { opacity: 1; }
.dt-speaker-anim span {
    width: 4px; border-radius: 2px; background: #38bdf8;
}
.dt-speaker-anim.playing span { animation: dt-bar .6s ease-in-out infinite alternate; }
.dt-speaker-anim span:nth-child(1) { height: 8px; animation-delay: 0s; }
.dt-speaker-anim span:nth-child(2) { height: 16px; animation-delay: .1s; }
.dt-speaker-anim span:nth-child(3) { height: 24px; animation-delay: .2s; }
.dt-speaker-anim span:nth-child(4) { height: 16px; animation-delay: .3s; }
.dt-speaker-anim span:nth-child(5) { height: 8px; animation-delay: .4s; }
@keyframes dt-bar { from { transform: scaleY(.3); } to { transform: scaleY(1); } }

/* Confirm row */
.dt-confirm-row {
    display: flex; align-items: center; justify-content: space-between;
    padding: .6rem .8rem; background: var(--dt-surface); border-radius: 8px;
    margin-bottom: 1rem; font-size: .88rem; color: var(--dt-body);
}
.dt-confirm-btns { display: flex; gap: .4rem; }

/* Network */
.dt-network-grid {
    display: grid; grid-template-columns: 1fr 1fr; gap: .6rem; margin-bottom: 1rem;
}
@media (max-width: 540px) { .dt-network-grid { grid-template-columns: 1fr; } }
.dt-net-item {
    display: flex; align-items: center; gap: .6rem;
    padding: .7rem .8rem; background: var(--dt-surface); border-radius: 10px;
    border: 1px solid transparent; transition: border-color .3s;
}
.dt-net-item.pass { border-color: #a7f3d0; background: #ecfdf5; }
.dt-net-item.fail { border-color: #fecaca; background: #fef2f2; }
.dt-net-item.warn { border-color: #fde68a; background: #fffbeb; }
.dt-net-icon { font-size: 1rem; color: var(--dt-faint); width: 24px; text-align: center; }
.dt-net-item.pass .dt-net-icon { color: var(--dt-green); }
.dt-net-item.fail .dt-net-icon { color: var(--dt-red); }
.dt-net-item.warn .dt-net-icon { color: var(--dt-amber); }
.dt-net-info { flex: 1; min-width: 0; }
.dt-net-label { font-size: .82rem; font-weight: 600; color: var(--dt-ink); }
.dt-net-detail {
    font-size: .72rem;
    color: var(--dt-muted);
    white-space: normal;
    overflow-wrap: anywhere;
    word-break: break-word;
    line-height: 1.35;
}
.dt-net-badge {
    width: 26px; height: 26px; border-radius: 50%;
    display: grid; place-items: center; font-size: .65rem; flex-shrink: 0;
}
.dt-badge-pending { background: var(--dt-border); color: var(--dt-faint); }
.dt-badge-pass { background: #d1fae5; color: #059669; }
.dt-badge-fail { background: #fee2e2; color: #dc2626; }
.dt-badge-warn { background: #fef3c7; color: #d97706; }

/* Status line */
.dt-status {
    padding: .55rem .8rem; border-radius: 8px; font-size: .85rem;
    margin-bottom: 1rem; background: var(--dt-surface); color: var(--dt-muted);
    display: flex; align-items: center; gap: .4rem;
}
.dt-status.pass { background: #ecfdf5; color: #059669; }
.dt-status.fail { background: #fef2f2; color: #dc2626; }
.dt-status.warn { background: #fffbeb; color: #d97706; }

/* Results */
.dt-results-grid {
    display: grid; grid-template-columns: 1fr 1fr; gap: .5rem; margin-bottom: 1rem;
}
@media (max-width: 540px) { .dt-results-grid { grid-template-columns: 1fr; } }
.dt-result-item {
    display: flex; align-items: center; gap: .6rem;
    padding: .7rem .8rem; border-radius: 10px;
    border: 1px solid var(--dt-border); background: #fff;
}
.dt-result-item.pass { border-color: #a7f3d0; background: #ecfdf5; }
.dt-result-item.fail { border-color: #fecaca; background: #fef2f2; }
.dt-result-item.warn { border-color: #fde68a; background: #fffbeb; }
.dt-result-icon { font-size: 1.2rem; width: 28px; text-align: center; }
.dt-result-item.pass .dt-result-icon { color: var(--dt-green); }
.dt-result-item.fail .dt-result-icon { color: var(--dt-red); }
.dt-result-item.warn .dt-result-icon { color: var(--dt-amber); }
.dt-result-info { flex: 1; }
.dt-result-label { font-size: .85rem; font-weight: 600; color: var(--dt-ink); }
.dt-result-detail { font-size: .75rem; color: var(--dt-muted); }

/* Troubleshoot */
.dt-troubleshoot {
    background: #fffbeb; border: 1px solid #fde68a; border-radius: 10px;
    padding: 1rem 1.2rem; margin-bottom: 1rem;
}
.dt-troubleshoot h6 {
    font-size: .88rem; font-weight: 700; color: #92400e; margin: 0 0 .5rem;
    display: flex; align-items: center; gap: .35rem;
}
.dt-troubleshoot ul { margin: 0; padding-left: 1.2rem; }
.dt-troubleshoot li { font-size: .82rem; color: #78350f; padding: .15rem 0; line-height: 1.45; }

/* Buttons */
.dt-actions { display: flex; gap: .5rem; justify-content: flex-end; }
.dt-btn {
    display: inline-flex; align-items: center; gap: .35rem;
    padding: .55rem 1.15rem; border-radius: 9px;
    font-weight: 600; font-size: .88rem;
    text-decoration: none; border: none; cursor: pointer;
    transition: background .15s, transform .15s;
}
.dt-btn:disabled { opacity: .5; cursor: not-allowed; transform: none !important; }
.dt-btn-primary { background: var(--dt-teal-700); color: #fff; }
.dt-btn-primary:hover:not(:disabled) { background: var(--dt-teal-800); transform: translateY(-1px); }
.dt-btn-outline { background: transparent; color: var(--dt-teal-700); border: 1.5px solid var(--dt-teal-700); }
.dt-btn-outline:hover:not(:disabled) { background: var(--dt-teal-50); }
.dt-btn-sm { padding: .35rem .7rem; font-size: .8rem; border-radius: 7px; }
.dt-btn-pass { background: #ecfdf5; color: #059669; border: 1px solid #a7f3d0; }
.dt-btn-pass:hover { background: #d1fae5; }
.dt-btn-pass.selected { background: #059669; color: #fff; border-color: #059669; }
.dt-btn-fail { background: #fef2f2; color: #dc2626; border: 1px solid #fecaca; }
.dt-btn-fail:hover { background: #fee2e2; }
.dt-btn-fail.selected { background: #dc2626; color: #fff; border-color: #dc2626; }

/* Bandwidth progress */
.dt-bw-progress {
    margin-bottom: 1rem; padding: .7rem .8rem;
    background: var(--dt-surface); border-radius: 10px;
    border: 1px solid var(--dt-border);
}
.dt-bw-progress-header {
    display: flex; align-items: center; justify-content: space-between;
    margin-bottom: .4rem;
}
.dt-bw-progress-label { font-size: .8rem; font-weight: 600; color: var(--dt-muted); display: flex; align-items: center; gap: .35rem; }
.dt-bw-progress-pct { font-size: .8rem; font-weight: 700; color: var(--dt-teal-700); font-variant-numeric: tabular-nums; }
.dt-bw-progress-track {
    height: 8px; background: var(--dt-border); border-radius: 4px; overflow: hidden;
}
.dt-bw-progress-fill {
    height: 100%; width: 0%; border-radius: 4px;
    background: linear-gradient(90deg, var(--dt-teal-600), #06b6d4);
    transition: width .15s ease;
}

/* Technical details toggle */
.dt-tech-toggle {
    display: flex; align-items: center; gap: .35rem;
    background: none; border: 1px solid var(--dt-border); border-radius: 8px;
    padding: .45rem .9rem; font-size: .82rem; font-weight: 600;
    color: var(--dt-muted); cursor: pointer; margin-bottom: .8rem;
    transition: color .15s, border-color .15s;
}
.dt-tech-toggle:hover { color: var(--dt-teal-700); border-color: var(--dt-teal-600); }
.dt-tech-toggle.open { color: var(--dt-teal-700); border-color: var(--dt-teal-600); }

/* Technical details panel */
.dt-tech-details {
    background: #f8fafc; border: 1px solid var(--dt-border); border-radius: 10px;
    padding: 1rem 1.2rem; margin-bottom: 1rem;
    animation: dt-fadeIn .25s ease;
}
.dt-tech-details h6 {
    font-size: .85rem; font-weight: 700; color: var(--dt-ink); margin: 0 0 .6rem;
    display: flex; align-items: center; gap: .35rem;
}
.dt-tech-grid {
    display: grid; grid-template-columns: 1fr; gap: 0;
}
.dt-tech-section {
    font-size: .72rem; font-weight: 700; text-transform: uppercase;
    letter-spacing: .05em; color: var(--dt-faint); padding: .5rem 0 .2rem;
    border-bottom: 1px solid var(--dt-border); margin-top: .3rem;
}
.dt-tech-section:first-child { margin-top: 0; }
.dt-tech-row {
    display: grid;
    grid-template-columns: minmax(130px, 220px) minmax(0, 1fr);
    gap: .5rem;
    align-items: start;
    padding: .3rem 0;
    font-size: .8rem;
    border-bottom: 1px solid #f1f5f9;
}
.dt-tech-row:last-child { border-bottom: none; }
.dt-tech-label { color: var(--dt-muted); }
.dt-tech-value {
    color: var(--dt-ink);
    font-weight: 600;
    font-variant-numeric: tabular-nums;
    text-align: left;
    overflow-wrap: anywhere;
    word-break: break-word;
    white-space: normal;
    line-height: 1.35;
}
.dt-tech-value.pass { color: #059669; }
.dt-tech-value.fail { color: #dc2626; }
.dt-tech-value.warn { color: #d97706; }