/* ─── XIAHDEH Scan — PSI-style UI ─────────────────────────────────────────── */

:root {
  --bg: #f8f9fa;
  --surface: #ffffff;
  --border: #e8eaed;
  --text: #202124;
  --text-muted: #5f6368;
  --text-light: #80868b;

  --score-good: #0cce6b;
  --score-average: #ffa400;
  --score-poor: #ff4e42;

  --eco-a: #009b5e;
  --eco-b: #49c24a;
  --eco-c: #cadc00;
  --eco-d: #f7c02e;
  --eco-e: #f7872e;
  --eco-f: #df5a34;
  --eco-g: #b91e14;

  --brand: #1a1a2e;
  --brand-accent: #e94560;

  --radius: 8px;
  --radius-lg: 12px;
  --shadow: 0 1px 3px rgba(0,0,0,.12), 0 1px 2px rgba(0,0,0,.08);
  --shadow-md: 0 4px 12px rgba(0,0,0,.12);
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  font-size: 14px;
  color: var(--text);
  background: var(--bg);
  line-height: 1.5;
  min-height: 100vh;
}

/* ─── Header ──────────────────────────────────────────────────────────────── */

.header {
  background: var(--brand);
  color: #fff;
  padding: 12px 24px;
  display: flex;
  align-items: center;
  gap: 12px;
}

.header-logo {
  font-size: 18px;
  font-weight: 700;
  letter-spacing: -.5px;
  color: #fff;
  text-decoration: none;
}

.header-logo span {
  color: var(--brand-accent);
}

.header-tagline {
  font-size: 12px;
  color: rgba(255,255,255,.5);
  border-left: 1px solid rgba(255,255,255,.2);
  padding-left: 12px;
  margin-left: 4px;
}

/* ─── Step: Form ──────────────────────────────────────────────────────────── */

#step-form {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: calc(100vh - 50px);
  padding: 40px 24px;
}

.form-card {
  background: var(--surface);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  padding: 40px 48px;
  width: 100%;
  max-width: 640px;
  text-align: center;
}

.form-title {
  font-size: 26px;
  font-weight: 700;
  color: var(--brand);
  margin-bottom: 8px;
}

.form-subtitle {
  color: var(--text-muted);
  margin-bottom: 32px;
  font-size: 14px;
}

.form-row {
  display: flex;
  gap: 8px;
}

.form-input {
  flex: 1;
  height: 48px;
  padding: 0 16px;
  font-size: 15px;
  border: 2px solid var(--border);
  border-radius: var(--radius);
  outline: none;
  transition: border-color .2s;
  color: var(--text);
  background: var(--bg);
}

.form-input:focus { border-color: var(--brand); }
.form-input::placeholder { color: var(--text-light); }

.btn-scan {
  height: 48px;
  padding: 0 28px;
  background: var(--brand);
  color: #fff;
  font-size: 15px;
  font-weight: 600;
  border: none;
  border-radius: var(--radius);
  cursor: pointer;
  white-space: nowrap;
  transition: background .2s;
}

.btn-scan:hover { background: #2d2d52; }
.btn-scan:disabled { background: var(--text-light); cursor: default; }

.form-badges {
  display: flex;
  gap: 8px;
  justify-content: center;
  margin-top: 20px;
  flex-wrap: wrap;
}

.badge {
  font-size: 11px;
  font-weight: 600;
  padding: 4px 10px;
  border-radius: 20px;
  background: var(--bg);
  border: 1px solid var(--border);
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: .4px;
}

.form-error {
  margin-top: 12px;
  font-size: 13px;
  color: var(--score-poor);
  min-height: 20px;
}

/* ─── Step: Loading ───────────────────────────────────────────────────────── */

#step-loading {
  display: none;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: calc(100vh - 50px);
  padding: 40px 24px;
  text-align: center;
}

.loading-url {
  font-size: 16px;
  font-weight: 600;
  color: var(--brand);
  margin-bottom: 32px;
  word-break: break-all;
}

.loading-spinner {
  width: 64px;
  height: 64px;
  border: 5px solid var(--border);
  border-top-color: var(--brand);
  border-radius: 50%;
  animation: spin 1s linear infinite;
  margin: 0 auto 24px;
}

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

.loading-steps {
  display: flex;
  flex-direction: column;
  gap: 10px;
  width: 100%;
  max-width: 360px;
  margin: 0 auto 16px;
}

.loading-step {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 13px;
  color: var(--text-muted);
  opacity: .4;
  transition: opacity .3s;
}

.loading-step.active { opacity: 1; color: var(--brand); font-weight: 600; }
.loading-step.done { opacity: .7; }

.step-icon {
  width: 20px;
  height: 20px;
  border-radius: 50%;
  border: 2px solid currentColor;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 10px;
  flex-shrink: 0;
}

.loading-step.done .step-icon::after { content: '✓'; }
.loading-step.active .step-icon {
  border-color: var(--brand);
  background: var(--brand);
  color: #fff;
}

.loading-message {
  color: var(--text-muted);
  font-size: 13px;
  min-height: 20px;
}

/* ─── Step: Results ───────────────────────────────────────────────────────── */

#step-results { display: none; }

.results-header {
  background: var(--brand);
  color: #fff;
  padding: 16px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}

.results-url {
  font-size: 16px;
  font-weight: 600;
  word-break: break-all;
}

.results-meta {
  font-size: 12px;
  color: rgba(255,255,255,.6);
  margin-top: 2px;
}

.results-actions {
  display: flex;
  gap: 8px;
  flex-shrink: 0;
}

.btn-action {
  padding: 8px 16px;
  font-size: 13px;
  font-weight: 600;
  border-radius: var(--radius);
  cursor: pointer;
  border: 1.5px solid rgba(255,255,255,.4);
  background: transparent;
  color: #fff;
  transition: background .2s, border-color .2s;
  white-space: nowrap;
}

.btn-action:hover { background: rgba(255,255,255,.1); border-color: rgba(255,255,255,.7); }

.btn-action.copied { border-color: var(--score-good); color: var(--score-good); }

/* ─── Device tabs ─────────────────────────────────────────────────────────── */

.device-tabs {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  padding: 0 24px;
  display: flex;
  gap: 0;
}

.device-tab {
  padding: 14px 20px;
  font-size: 14px;
  font-weight: 500;
  color: var(--text-muted);
  cursor: pointer;
  border: none;
  background: none;
  border-bottom: 3px solid transparent;
  margin-bottom: -1px;
  transition: color .2s, border-color .2s;
  display: flex;
  align-items: center;
  gap: 6px;
}

.device-tab:hover { color: var(--text); }

.device-tab.active {
  color: var(--brand);
  border-bottom-color: var(--brand);
  font-weight: 600;
}

/* ─── Score gauges row ────────────────────────────────────────────────────── */

.gauges-row {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  padding: 24px;
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  overflow-x: auto;
}

.gauge-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  cursor: pointer;
  padding: 12px 16px;
  border-radius: var(--radius);
  border: 2px solid transparent;
  transition: border-color .2s, background .2s;
  min-width: 100px;
}

.gauge-item:hover { background: var(--bg); }

.gauge-item.active {
  border-color: currentColor;
  background: var(--bg);
}

.gauge-circle {
  position: relative;
  width: 72px;
  height: 72px;
}

.gauge-circle svg {
  transform: rotate(-90deg);
}

.gauge-circle .track {
  fill: none;
  stroke: var(--border);
  stroke-width: 5;
}

.gauge-circle .fill {
  fill: none;
  stroke-width: 5;
  stroke-linecap: round;
  stroke-dasharray: 188.5; /* 2π × 30 */
  stroke-dashoffset: 188.5;
  transition: stroke-dashoffset .8s ease, stroke .3s;
}

.gauge-score-text {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  font-weight: 700;
  color: var(--text);
}

.gauge-label {
  margin-top: 8px;
  font-size: 12px;
  font-weight: 500;
  color: var(--text-muted);
  text-align: center;
}

/* coming-soon gauge */
.gauge-soon {
  width: 72px;
  height: 72px;
  border: 3px dashed var(--border);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 11px;
  color: var(--text-light);
  text-align: center;
  line-height: 1.2;
  padding: 4px;
}

/* ─── Category panels ─────────────────────────────────────────────────────── */

.category-panels { padding: 0; }

.category-panel { display: none; }
.category-panel.active { display: block; }

/* ─── Performance: metrics cards ─────────────────────────────────────────── */

.metrics-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 12px;
  padding: 24px;
  background: var(--bg);
  border-bottom: 1px solid var(--border);
}

.metric-card {
  background: var(--surface);
  border-radius: var(--radius);
  padding: 14px 16px;
  border-left: 4px solid var(--border);
}

.metric-card.good { border-left-color: var(--score-good); }
.metric-card.average { border-left-color: var(--score-average); }
.metric-card.poor { border-left-color: var(--score-poor); }

.metric-card-label {
  font-size: 11px;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: .5px;
  margin-bottom: 4px;
}

.metric-card-value {
  font-size: 22px;
  font-weight: 700;
  line-height: 1.1;
}

.metric-card-title {
  font-size: 11px;
  color: var(--text-muted);
  margin-top: 2px;
}

/* ─── Audit sections ──────────────────────────────────────────────────────── */

.audit-section {
  border-bottom: 1px solid var(--border);
}

.audit-section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 24px;
  cursor: pointer;
  user-select: none;
  background: var(--surface);
  transition: background .15s;
}

.audit-section-header:hover { background: var(--bg); }

.audit-section-title {
  font-size: 14px;
  font-weight: 600;
  color: var(--text);
  display: flex;
  align-items: center;
  gap: 8px;
}

.audit-count {
  font-size: 12px;
  background: var(--border);
  color: var(--text-muted);
  border-radius: 10px;
  padding: 1px 7px;
  font-weight: 500;
}

.audit-chevron {
  font-size: 12px;
  color: var(--text-muted);
  transition: transform .2s;
}

.audit-section.open .audit-chevron { transform: rotate(180deg); }

.audit-list {
  display: none;
  background: var(--bg);
}

.audit-section.open .audit-list { display: block; }

/* ─── Audit item ──────────────────────────────────────────────────────────── */

.audit-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 12px 24px;
  border-top: 1px solid var(--border);
  background: var(--surface);
}

.audit-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  flex-shrink: 0;
  margin-top: 4px;
}

.audit-dot.good { background: var(--score-good); }
.audit-dot.average { background: var(--score-average); }
.audit-dot.poor { background: var(--score-poor); }
.audit-dot.info { background: var(--border); }

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

.audit-title {
  font-size: 13px;
  font-weight: 600;
  color: var(--text);
}

.audit-display {
  font-size: 12px;
  color: var(--score-average);
  font-weight: 600;
  margin-left: 8px;
}

.audit-description {
  font-size: 12px;
  color: var(--text-muted);
  margin-top: 3px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.audit-table {
  margin-top: 8px;
  border-radius: 4px;
  overflow: hidden;
  border: 1px solid var(--border);
  font-size: 11px;
  width: 100%;
  max-width: 100%;
  overflow-x: auto;
}

.audit-table table {
  width: 100%;
  border-collapse: collapse;
}

.audit-table th, .audit-table td {
  padding: 6px 10px;
  text-align: left;
  border-bottom: 1px solid var(--border);
  max-width: 320px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.audit-table th {
  background: var(--bg);
  font-weight: 600;
  color: var(--text-muted);
}

/* ─── EcoIndex panel ──────────────────────────────────────────────────────── */

.eco-panel { padding: 24px; }

.eco-grade-bar {
  display: flex;
  align-items: flex-end;
  gap: 4px;
  justify-content: center;
  margin-bottom: 32px;
}

.eco-grade-cell {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
}

.eco-grade-block {
  width: 52px;
  height: 28px;
  border-radius: 4px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 14px;
  color: #fff;
  opacity: .45;
  transition: opacity .3s, transform .3s;
}

.eco-grade-block.active {
  opacity: 1;
  transform: scaleY(1.3);
  transform-origin: bottom;
  border-radius: 4px 4px 0 0;
}

.eco-grade-letter {
  font-size: 12px;
  font-weight: 700;
  color: var(--text-muted);
}

.eco-grade-block[data-grade="A"] { background: var(--eco-a); }
.eco-grade-block[data-grade="B"] { background: var(--eco-b); }
.eco-grade-block[data-grade="C"] { background: var(--eco-c); }
.eco-grade-block[data-grade="D"] { background: var(--eco-d); }
.eco-grade-block[data-grade="E"] { background: var(--eco-e); }
.eco-grade-block[data-grade="F"] { background: var(--eco-f); }
.eco-grade-block[data-grade="G"] { background: var(--eco-g); }

.eco-score-display {
  text-align: center;
  margin-bottom: 32px;
}

.eco-score-number {
  font-size: 48px;
  font-weight: 700;
  line-height: 1;
}

.eco-score-label {
  font-size: 13px;
  color: var(--text-muted);
  margin-top: 4px;
}

.eco-metrics {
  display: flex;
  flex-direction: column;
  gap: 20px;
  max-width: 560px;
  margin: 0 auto;
}

.eco-metric {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px 20px;
}

.eco-metric-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 10px;
}

.eco-metric-title {
  font-size: 14px;
  font-weight: 600;
  color: var(--text);
}

.eco-metric-badge {
  font-size: 11px;
  font-weight: 700;
  padding: 3px 10px;
  border-radius: 20px;
  background: var(--border);
  color: var(--text);
}

.eco-metric-badge.ok { background: #e6f9f0; color: var(--eco-a); }
.eco-metric-badge.warn { background: #fff8e1; color: #e65100; }
.eco-metric-badge.bad { background: #fdecea; color: var(--score-poor); }

.eco-metric-value {
  font-size: 22px;
  font-weight: 700;
  margin-bottom: 10px;
}

.eco-slider {
  position: relative;
  height: 10px;
  background: linear-gradient(to right,
    var(--eco-a) 0%, var(--eco-b) 25%,
    var(--eco-c) 40%, var(--eco-d) 55%,
    var(--eco-e) 70%, var(--eco-f) 85%,
    var(--eco-g) 100%
  );
  border-radius: 5px;
  margin-bottom: 8px;
}

.eco-slider-thumb {
  position: absolute;
  top: 50%;
  transform: translate(-50%, -50%);
  width: 16px;
  height: 16px;
  background: #fff;
  border: 3px solid var(--text);
  border-radius: 50%;
  box-shadow: 0 2px 4px rgba(0,0,0,.2);
}

.eco-slider-markers {
  display: flex;
  justify-content: space-between;
  font-size: 11px;
  color: var(--text-muted);
}

.eco-equivalences {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  max-width: 400px;
  margin: 24px auto 0;
}

.eco-equiv {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 12px 16px;
  text-align: center;
}

.eco-equiv-value {
  font-size: 20px;
  font-weight: 700;
  color: var(--brand);
}

.eco-equiv-label {
  font-size: 11px;
  color: var(--text-muted);
  margin-top: 2px;
}

/* ─── Coming soon panel ───────────────────────────────────────────────────── */

.panel-coming-soon {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 60px 24px;
  color: var(--text-muted);
  gap: 12px;
}

.panel-coming-soon-icon { font-size: 40px; opacity: .4; }
.panel-coming-soon-title { font-size: 16px; font-weight: 600; }
.panel-coming-soon-text { font-size: 13px; }

/* ─── Error panel ─────────────────────────────────────────────────────────── */

.error-card {
  max-width: 540px;
  margin: 60px auto;
  background: var(--surface);
  border-radius: var(--radius-lg);
  padding: 32px;
  text-align: center;
  box-shadow: var(--shadow);
}

.error-card-icon { font-size: 36px; margin-bottom: 16px; }
.error-card-title { font-size: 18px; font-weight: 700; color: var(--text); margin-bottom: 8px; }
.error-card-message { font-size: 13px; color: var(--text-muted); margin-bottom: 20px; }

.btn-retry {
  padding: 10px 24px;
  background: var(--brand);
  color: #fff;
  border: none;
  border-radius: var(--radius);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
}

/* ─── Utilities ───────────────────────────────────────────────────────────── */

.hidden { display: none !important; }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0,0,0,0); }

/* ─── Print styles ────────────────────────────────────────────────────────── */

@media print {
  .header, .device-tabs, .results-actions, .audit-section-header { -webkit-print-color-adjust: exact; print-color-adjust: exact; }
  .btn-action, .device-tab:not(.active) { display: none; }
  #step-form, #step-loading { display: none !important; }
  #step-results { display: block !important; }
  .category-panel { display: block !important; }
  .audit-list { display: block !important; }
  body { background: #fff; }
}

/* ─── Responsive ──────────────────────────────────────────────────────────── */

@media (max-width: 600px) {
  .form-card { padding: 28px 20px; }
  .form-row { flex-direction: column; }
  .gauges-row { gap: 8px; padding: 16px; }
  .gauge-item { min-width: 80px; padding: 8px; }
  .gauge-circle { width: 58px; height: 58px; }
  .gauge-score-text { font-size: 15px; }
  .results-header { padding: 12px 16px; }
  .metrics-grid { grid-template-columns: 1fr 1fr; padding: 16px; }
  .eco-panel { padding: 16px; }
}