/* =========================================================
   Professional Page Speed Analyzer — Front-End Styles
   ========================================================= */

/* ---------- Reset / base ---------- */
.psa-wrap *,
.psa-wrap *::before,
.psa-wrap *::after {
    box-sizing: border-box;
}

.psa-wrap {
    --psa-primary:   #4f46e5;
    --psa-primary-l: #818cf8;
    --psa-good:      #22c55e;
    --psa-avg:       #f59e0b;
    --psa-poor:      #ef4444;
    --psa-bg:        #f8fafc;
    --psa-card:      #ffffff;
    --psa-border:    #e2e8f0;
    --psa-text:      #1e293b;
    --psa-muted:     #64748b;
    --psa-radius:    14px;
    --psa-shadow:    0 4px 24px rgba(79,70,229,.08);

    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    font-size: 15px;
    color: var(--psa-text);
    background: var(--psa-bg);
    border-radius: var(--psa-radius);
    overflow: hidden;
    margin: 0 auto;
    max-width: 1100px;
}

/* ---------- Search bar ---------- */
.psa-search-bar {
    background: linear-gradient(135deg, #312e81 0%, #4f46e5 60%, #6366f1 100%);
    padding: 28px 24px 32px;
}

.psa-search-inner {
    display: flex;
    flex-direction: column;
    gap: 18px;
    max-width: 860px;
    margin: 0 auto;
}

.psa-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    color: #fff;
    font-size: 1.15rem;
    font-weight: 700;
    letter-spacing: .3px;
}

.psa-logo svg circle,
.psa-logo svg path {
    stroke: #fff;
}

.psa-search-group {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-wrap: wrap;
}

.psa-url-input {
    flex: 1;
    min-width: 240px;
    padding: 13px 18px;
    border-radius: 10px;
    border: 2px solid transparent;
    font-size: 1rem;
    background: rgba(255,255,255,.95);
    color: var(--psa-text);
    outline: none;
    transition: border-color .2s, box-shadow .2s;
}

.psa-url-input:focus {
    border-color: var(--psa-primary-l);
    box-shadow: 0 0 0 4px rgba(129,140,248,.3);
}

/* Device toggle */
.psa-device-toggle {
    display: flex;
    gap: 4px;
    background: rgba(255,255,255,.15);
    border-radius: 8px;
    padding: 3px;
}

.psa-device-btn {
    display: flex;
    align-items: center;
    gap: 5px;
    padding: 8px 14px;
    border: none;
    background: transparent;
    color: rgba(255,255,255,.8);
    border-radius: 6px;
    font-size: .85rem;
    font-weight: 500;
    cursor: pointer;
    transition: background .2s, color .2s;
}

.psa-device-btn.active {
    background: #fff;
    color: var(--psa-primary);
}

.psa-device-btn:not(.active):hover {
    background: rgba(255,255,255,.2);
    color: #fff;
}

/* Analyze button */
.psa-analyze-btn {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 13px 26px;
    background: #fff;
    color: var(--psa-primary);
    font-size: 1rem;
    font-weight: 700;
    border: none;
    border-radius: 10px;
    cursor: pointer;
    transition: transform .15s, box-shadow .15s, background .2s;
    white-space: nowrap;
    box-shadow: 0 4px 12px rgba(0,0,0,.15);
}

.psa-analyze-btn:hover {
    transform: translateY(-1px);
    box-shadow: 0 6px 20px rgba(0,0,0,.2);
}

.psa-analyze-btn:active {
    transform: translateY(0);
}

.psa-analyze-btn:disabled {
    opacity: .6;
    cursor: not-allowed;
    transform: none;
}

/* Button spinner */
.psa-btn-spinner {
    width: 16px;
    height: 16px;
    border: 2.5px solid rgba(79,70,229,.3);
    border-top-color: var(--psa-primary);
    border-radius: 50%;
    animation: psa-spin .7s linear infinite;
}

/* ---------- Status / error ---------- */
.psa-status {
    margin: 16px 24px;
    padding: 14px 20px;
    border-radius: 10px;
    font-weight: 500;
}

.psa-status.error {
    background: #fef2f2;
    border: 1px solid #fecaca;
    color: #dc2626;
}

.psa-status.info {
    background: #eff6ff;
    border: 1px solid #bfdbfe;
    color: #2563eb;
}

/* ---------- Loading ---------- */
.psa-loading {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 64px 24px;
}

.psa-loading-inner {
    text-align: center;
}

.psa-spinner-ring {
    width: 60px;
    height: 60px;
    border: 5px solid #e2e8f0;
    border-top-color: var(--psa-primary);
    border-radius: 50%;
    animation: psa-spin .9s linear infinite;
    margin: 0 auto 20px;
}

.psa-loading-text {
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--psa-text);
    margin: 0 0 6px;
}

.psa-loading-sub {
    color: var(--psa-muted);
    font-size: .9rem;
    margin: 0;
}

@keyframes psa-spin {
    to { transform: rotate(360deg); }
}

/* ---------- Results ---------- */
.psa-results {
    padding: 24px;
}

.psa-results-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 12px;
    margin-bottom: 24px;
}

.psa-results-meta {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 10px;
}

.psa-meta-url {
    font-size: .95rem;
    font-weight: 600;
    color: var(--psa-text);
    max-width: 400px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.psa-meta-badge {
    padding: 3px 12px;
    border-radius: 20px;
    font-size: .8rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: .5px;
    background: #ede9fe;
    color: var(--psa-primary);
}

.psa-meta-time {
    color: var(--psa-muted);
    font-size: .85rem;
}

.psa-pdf-btn {
    display: flex;
    align-items: center;
    gap: 7px;
    padding: 9px 18px;
    background: var(--psa-primary);
    color: #fff;
    border: none;
    border-radius: 8px;
    font-size: .9rem;
    font-weight: 600;
    cursor: pointer;
    transition: background .2s, transform .15s;
}

.psa-pdf-btn:hover {
    background: #4338ca;
    transform: translateY(-1px);
}

/* ---- Top row: score + screenshot ---- */
.psa-top-row {
    display: grid;
    grid-template-columns: 260px 1fr;
    gap: 20px;
    margin-bottom: 24px;
}

@media (max-width: 680px) {
    .psa-top-row { grid-template-columns: 1fr; }
}

/* ---- Cards ---- */
.psa-score-card,
.psa-screenshot-card {
    background: var(--psa-card);
    border: 1px solid var(--psa-border);
    border-radius: var(--psa-radius);
    padding: 24px;
    box-shadow: var(--psa-shadow);
}

.psa-card-title {
    margin: 0 0 18px;
    font-size: 1rem;
    font-weight: 700;
    color: var(--psa-text);
}

/* ---- Gauge ---- */
.psa-gauge-wrap {
    position: relative;
    width: 170px;
    height: 170px;
    margin: 0 auto 16px;
}

.psa-gauge-svg {
    width: 100%;
    height: 100%;
}

.psa-gauge-bg {
    stroke: #e2e8f0;
}

.psa-gauge-track {
    stroke: var(--psa-good);
    transition: stroke-dashoffset 1.2s cubic-bezier(.4,0,.2,1), stroke .4s;
}

.psa-gauge-inner {
    position: absolute;
    inset: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.psa-gauge-score {
    font-size: 2.6rem;
    font-weight: 800;
    line-height: 1;
    color: var(--psa-text);
}

.psa-gauge-label {
    font-size: .78rem;
    color: var(--psa-muted);
    font-weight: 500;
    margin-top: 4px;
    text-transform: uppercase;
    letter-spacing: .5px;
}

.psa-score-legend {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 8px;
    margin-top: 4px;
}

.psa-leg {
    font-size: .76rem;
    padding: 3px 10px;
    border-radius: 20px;
    font-weight: 600;
}

.psa-leg.good  { background:#dcfce7; color:#166534; }
.psa-leg.avg   { background:#fef9c3; color:#854d0e; }
.psa-leg.poor  { background:#fee2e2; color:#991b1b; }

/* ---- Screenshot ---- */
.psa-screenshot-wrap {
    width: 100%;
    min-height: 200px;
    border-radius: 10px;
    overflow: hidden;
    background: #f1f5f9;
    border: 1px solid var(--psa-border);
    display: flex;
    align-items: center;
    justify-content: center;
}

.psa-screenshot-wrap img {
    max-width: 100%;
    height: auto;
    display: block;
}

.psa-screenshot-placeholder {
    text-align: center;
    color: var(--psa-muted);
    padding: 24px;
}

.psa-screenshot-placeholder p {
    margin: 10px 0 0;
    font-size: .9rem;
}

/* ---- Section ---- */
.psa-section {
    margin-bottom: 28px;
}

.psa-section-title {
    display: flex;
    align-items: center;
    gap: 9px;
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--psa-text);
    margin: 0 0 16px;
    padding-bottom: 10px;
    border-bottom: 2px solid var(--psa-border);
}

.psa-section-title svg {
    color: var(--psa-primary);
}

/* ---- CWV Grid ---- */
.psa-cwv-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    gap: 14px;
}

.psa-cwv-card {
    background: var(--psa-card);
    border: 1px solid var(--psa-border);
    border-radius: 12px;
    padding: 18px 16px;
    box-shadow: var(--psa-shadow);
    transition: transform .2s, box-shadow .2s;
    cursor: default;
    position: relative;
    overflow: hidden;
}

.psa-cwv-card::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 4px;
    border-radius: 12px 12px 0 0;
    background: var(--cwv-color, #e2e8f0);
}

.psa-cwv-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 30px rgba(79,70,229,.12);
}

.psa-cwv-abbr {
    font-size: .75rem;
    font-weight: 700;
    letter-spacing: 1px;
    text-transform: uppercase;
    color: var(--cwv-color, var(--psa-muted));
    margin-bottom: 6px;
}

.psa-cwv-value {
    font-size: 1.7rem;
    font-weight: 800;
    color: var(--psa-text);
    line-height: 1;
    margin-bottom: 4px;
}

.psa-cwv-label {
    font-size: .78rem;
    color: var(--psa-muted);
    line-height: 1.4;
}

.psa-cwv-badge {
    display: inline-block;
    margin-top: 10px;
    padding: 2px 10px;
    border-radius: 20px;
    font-size: .72rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: .4px;
    background: color-mix(in srgb, var(--cwv-color, #e2e8f0) 15%, white);
    color: var(--cwv-color, var(--psa-muted));
}

/* ---- Suggestions ---- */
.psa-suggestions {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.psa-suggestion-item {
    background: var(--psa-card);
    border: 1px solid var(--psa-border);
    border-left: 4px solid var(--sug-color, var(--psa-avg));
    border-radius: 0 10px 10px 0;
    padding: 14px 18px;
    display: flex;
    align-items: flex-start;
    gap: 14px;
    transition: background .15s;
}

.psa-suggestion-item:hover {
    background: #fafbff;
}

.psa-sug-icon {
    flex-shrink: 0;
    width: 32px;
    height: 32px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    background: color-mix(in srgb, var(--sug-color, var(--psa-avg)) 15%, white);
    color: var(--sug-color, var(--psa-avg));
    font-weight: 800;
    font-size: .85rem;
}

.psa-sug-body {
    flex: 1;
    min-width: 0;
}

.psa-sug-title {
    font-weight: 600;
    font-size: .95rem;
    color: var(--psa-text);
    margin-bottom: 3px;
}

.psa-sug-desc {
    font-size: .83rem;
    color: var(--psa-muted);
    line-height: 1.5;
}

.psa-sug-value {
    font-size: .82rem;
    font-weight: 700;
    color: var(--sug-color, var(--psa-avg));
    margin-top: 4px;
}

.psa-no-suggestions {
    background: #f0fdf4;
    border: 1px solid #bbf7d0;
    border-radius: 10px;
    padding: 20px 24px;
    color: #166534;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 10px;
}

/* ---- Resource table ---- */
.psa-table-wrap {
    overflow-x: auto;
    border-radius: 12px;
    border: 1px solid var(--psa-border);
    box-shadow: var(--psa-shadow);
}

.psa-table {
    width: 100%;
    border-collapse: collapse;
    background: var(--psa-card);
    font-size: .85rem;
}

.psa-table thead th {
    background: #f1f5f9;
    padding: 11px 14px;
    text-align: left;
    font-weight: 700;
    color: var(--psa-muted);
    font-size: .78rem;
    text-transform: uppercase;
    letter-spacing: .5px;
    white-space: nowrap;
    border-bottom: 1px solid var(--psa-border);
}

.psa-table tbody td {
    padding: 10px 14px;
    border-bottom: 1px solid #f1f5f9;
    vertical-align: middle;
    color: var(--psa-text);
}

.psa-table tbody tr:last-child td {
    border-bottom: none;
}

.psa-table tbody tr:hover td {
    background: #fafbff;
}

.psa-table .psa-td-url {
    max-width: 280px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    font-family: "SF Mono", "Fira Code", monospace;
    font-size: .78rem;
    color: #3730a3;
}

.psa-type-badge {
    display: inline-block;
    padding: 2px 9px;
    border-radius: 20px;
    font-size: .72rem;
    font-weight: 600;
    text-transform: uppercase;
}

.psa-type-Script    { background:#ede9fe; color:#5b21b6; }
.psa-type-Stylesheet{ background:#e0f2fe; color:#075985; }
.psa-type-Image     { background:#dcfce7; color:#166534; }
.psa-type-Font      { background:#fef9c3; color:#854d0e; }
.psa-type-Document  { background:#fce7f3; color:#9d174d; }
.psa-type-Other     { background:#f1f5f9; color:#475569; }

/* Waterfall bar */
.psa-th-waterfall { min-width: 160px; }
.psa-bar-wrap { background: #f1f5f9; border-radius: 4px; height: 10px; position: relative; min-width: 100px; }
.psa-bar-fill { position: absolute; top: 0; bottom: 0; background: var(--psa-primary); border-radius: 4px; opacity: .75; }

/* ---- Responsive ---- */
@media (max-width: 600px) {
    .psa-search-group   { flex-direction: column; }
    .psa-url-input      { width: 100%; }
    .psa-analyze-btn    { width: 100%; justify-content: center; }
    .psa-cwv-grid       { grid-template-columns: 1fr 1fr; }
    .psa-results-header { flex-direction: column; align-items: flex-start; }
}