:root {
    --dt-bg: #0a0a0c;
    --dt-surface: #111116;
    --dt-card: #16161e;
    --dt-border: #2a2a3a;
    --dt-accent: #f5a623;
    --dt-accent2: #e8392a;
    --dt-teal: #00c9a7;
    --dt-text: #f0f0f5;
    --dt-muted: #6b6b82;
    --dt-green: #3ddc84;
    --dt-red: #ff4d4d;
  }

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

  *, *::before, *::after { box-sizing: border-box; }
  .app {
    font-family: 'DM Sans', sans-serif;
    overflow-x: hidden;
  }

  /* Ambient background */
  body::before {
    content: '';
    position: fixed;
    top: -40%;
    left: -20%;
    width: 80%;
    height: 80%;
    background: radial-gradient(ellipse, rgba(245,166,35,0.06) 0%, transparent 70%);
    pointer-events: none;
    z-index: 0;
  }
  body::after {
    content: '';
    position: fixed;
    bottom: -30%;
    right: -20%;
    width: 70%;
    height: 70%;
    background: radial-gradient(ellipse, rgba(0,201,167,0.05) 0%, transparent 70%);
    pointer-events: none;
    z-index: 0;
  }

  .app {
    position: relative;
    z-index: 1;
    max-width: 860px;
    margin: 0 auto;
    padding: 40px 20px 80px;
  }

  /* Header */
  .header {
    text-align: center;
    margin-bottom: 32px;
    animation: fadeDown 0.6s ease both;
  }
  .logo-badge {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    background: var(--dt-surface);
    border: 1px solid var(--dt-border);
    border-radius: 100px;
    padding: 6px 18px 6px 10px;
    margin-bottom: 24px;
    font-family: 'JetBrains Mono', monospace;
    font-size: 11px;
    color: var(--dt-accent);
    letter-spacing: 0.08em;
    text-transform: uppercase;
  }
  .logo-dot {
    width: 8px; height: 8px;
    background: var(--dt-accent);
    border-radius: 50%;
    animation: pulse 2s ease infinite;
  }
  @keyframes pulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.5; transform: scale(0.8); }
  }
  h1 {
    font-family: 'Bebas Neue', sans-serif;
    font-size: clamp(52px, 8vw, 90px);
    line-height: 0.9;
    letter-spacing: 0.02em;
    color: var(--dt-text);
    margin-bottom: 12px;
  }
  h1 span { color: var(--dt-accent); }
  .header-sub {
    color: #e8e8f0;
    font-size: 16px;
    font-weight: 500;
    max-width: 460px;
    margin: 0 auto;
  }

  /* Progress Track */
  .progress-track {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0;
    margin-bottom: 44px;
    animation: fadeUp 0.6s 0.2s ease both;
  }
  .step-node {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    cursor: default;
  }
  .step-node.clickable { cursor: pointer; }
  .step-circle {
    width: 44px; height: 44px;
    border-radius: 50%;
    background: var(--dt-card);
    border: 2px solid var(--dt-border);
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: 'JetBrains Mono', monospace;
    font-size: 14px;
    font-weight: 600;
    color: var(--dt-muted);
    transition: all 0.3s ease;
    position: relative;
  }
  .step-node.active .step-circle {
    background: var(--dt-accent);
    border-color: var(--dt-accent);
    color: #000;
    box-shadow: 0 0 20px rgba(245,166,35,0.4);
  }
  .step-node.done .step-circle {
    background: var(--dt-teal);
    border-color: var(--dt-teal);
    color: #000;
  }
  .step-label {
    font-size: 11px;
    color: var(--dt-muted);
    text-transform: uppercase;
    letter-spacing: 0.06em;
    font-weight: 500;
    white-space: nowrap;
  }
  .step-node.active .step-label { color: var(--dt-accent); }
  .step-node.done .step-label { color: var(--dt-teal); }
  .step-line {
    width: 60px;
    height: 2px;
    background: var(--dt-border);
    margin-bottom: 20px;
    transition: background 0.4s ease;
    flex-shrink: 0;
  }
  .step-line.done { background: var(--dt-teal); }

  /* Card */
  .card {
    background: rgba(22, 22, 30, 0.97) !important;
    border: 1px solid var(--dt-border);
    border-radius: 20px;
    padding: 40px;
    animation: fadeUp 0.4s ease both;
    position: relative;
    overflow: hidden;
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
  }
  .card::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--dt-accent), var(--dt-teal));
    border-radius: 20px 20px 0 0;
  }

  .card-title {
    font-family: 'Bebas Neue', sans-serif;
    font-size: 36px;
    letter-spacing: 0.04em;
    margin-bottom: 6px;
    color: var(--dt-text);
  }
  .card-sub {
    color: var(--dt-muted);
    font-size: 14px;
    margin-bottom: 32px;
  }

  /* Vehicle Grid */
  .vehicle-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
    gap: 14px;
    margin-bottom: 32px;
  }
  .vehicle-card {
    background: var(--dt-surface) !important;
    border: 2px solid var(--dt-border);
    border-radius: 14px;
    padding: 20px 16px 16px;
    cursor: pointer;
    transition: all 0.2s ease;
    text-align: center;
    position: relative;
  }
  .vehicle-card:hover {
    border-color: rgba(245,166,35,0.4);
    transform: translateY(-2px);
  }
  .vehicle-card.selected {
    border-color: var(--dt-accent);
    background: rgba(245,166,35,0.08);
    box-shadow: 0 0 0 1px var(--dt-accent), 0 8px 24px rgba(245,166,35,0.15);
  }
  .vehicle-card.selected::after {
    content: '✓';
    position: absolute;
    top: 10px; right: 12px;
    font-size: 12px;
    color: var(--dt-accent);
    font-weight: 700;
  }
  .vehicle-icon { font-size: 40px; margin-bottom: 10px; display: block; }
  .vehicle-name {
    font-weight: 600;
    font-size: 13px;
    color: var(--dt-text);
    margin-bottom: 4px;
  }
  .vehicle-hint {
    font-size: 11px;
    color: var(--dt-muted);
  }

  /* Car Body SVG Panel */
  .car-panel {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 24px;
    margin-bottom: 28px;
  }
  .car-view-tabs {
    display: flex;
    gap: 8px;
  }
  .view-tab {
    padding: 7px 18px;
    border-radius: 100px;
    border: 1px solid var(--dt-border);
    background: var(--dt-surface);
    color: var(--dt-muted);
    font-size: 12px;
    font-weight: 600;
    cursor: pointer;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    transition: all 0.2s;
  }
  .view-tab.active {
    background: var(--dt-accent);
    color: #000;
    border-color: var(--dt-accent);
  }

  .car-svg-wrap {
    position: relative;
    width: 100%;
    max-width: 580px;
  }
  .car-svg-wrap svg {
    width: 100%;
    height: auto;
    display: block;
    pointer-events: all;
  }

  /* Hotspot zones on SVG */
  .zone {
    cursor: pointer;
    transition: fill-opacity 0.2s;
    fill-opacity: 0.05;
    pointer-events: all;
  }
  .zone:hover { fill-opacity: 0.45; }
  .zone.selected { fill-opacity: 0.55; }
  .zone-front { fill: var(--dt-accent); }
  .zone-hood { fill: var(--dt-teal); }
  .zone-roof { fill: #7c6ef5; }
  .zone-trunk { fill: var(--dt-accent2); }
  .zone-door-l { fill: var(--dt-teal); }
  .zone-door-r { fill: #7c6ef5; }
  .zone-fender-l { fill: var(--dt-accent); }
  .zone-fender-r { fill: var(--dt-accent2); }
  .zone-quarter-l { fill: #f5a623; }
  .zone-quarter-r { fill: #00c9a7; }
  .zone-bumper-f { fill: var(--dt-accent); }
  .zone-bumper-r { fill: var(--dt-accent2); }

  .selected-zones-list {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    min-height: 36px;
    margin-top: 8px;
  }
  .zone-tag {
    display: flex;
    align-items: center;
    gap: 6px;
    background: rgba(245,166,35,0.12);
    border: 1px solid rgba(245,166,35,0.3);
    border-radius: 100px;
    padding: 4px 12px 4px 8px;
    font-size: 12px;
    color: var(--dt-accent);
    font-weight: 500;
  }
  .zone-tag button {
    background: none;
    border: none;
    color: var(--dt-accent);
    cursor: pointer;
    font-size: 14px;
    line-height: 1;
    padding: 0;
    opacity: 0.6;
  }
  .zone-tag button:hover { opacity: 1; }

  /* Dent Size Selector */
  .dent-sizes {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 12px;
    margin-bottom: 12px;
  }
  .dent-size-card {
    border: 2px solid var(--dt-border);
    border-radius: 14px;
    background: var(--dt-surface);
    cursor: pointer;
    padding: 20px 12px 16px;
    text-align: center;
    transition: all 0.2s;
  }
  .dent-size-card:hover { border-color: rgba(245,166,35,0.4); transform: translateY(-2px); }
  .dent-size-card.selected {
    border-color: var(--dt-accent);
    background: rgba(245,166,35,0.08);
    box-shadow: 0 0 0 1px var(--dt-accent);
  }
  .dent-bubble {
    border-radius: 50%;
    background: radial-gradient(circle at 35% 35%, #fff3, #0003);
    border: 2px solid rgba(255,255,255,0.15);
    margin: 0 auto 12px;
    transition: all 0.2s;
  }
  .dent-size-name { font-size: 13px; font-weight: 600; margin-bottom: 2px; }
  .dent-size-desc { font-size: 11px; color: var(--dt-muted); }

  /* Material / factors */
  .factor-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 14px;
    margin-bottom: 28px;
  }
  .factor-card {
    background: var(--dt-surface);
    border: 2px solid var(--dt-border);
    border-radius: 14px;
    padding: 18px 20px;
    cursor: pointer;
    transition: all 0.2s;
  }
  .factor-card:hover { border-color: rgba(245,166,35,0.3); }
  .factor-card.selected {
    border-color: var(--dt-accent);
    background: rgba(245,166,35,0.08);
  }
  .factor-card.bad.selected {
    border-color: var(--dt-red);
    background: rgba(255,77,77,0.08);
  }
  .factor-card.bad.selected .factor-name { color: var(--dt-red); }
  .factor-label {
    font-size: 10px;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--dt-muted);
    margin-bottom: 6px;
    font-weight: 600;
  }
  .factor-name { font-size: 14px; font-weight: 600; }
  .factor-hint { font-size: 11px; color: var(--dt-muted); margin-top: 2px; }
  .factor-icon { font-size: 22px; margin-bottom: 8px; display: block; }

  /* Disqualified warning */
  .disqualify-box {
    background: rgba(255,77,77,0.08);
    border: 1px solid rgba(255,77,77,0.3);
    border-radius: 12px;
    padding: 20px 24px;
    margin-bottom: 24px;
    display: flex;
    gap: 14px;
    align-items: flex-start;
    animation: shakeIn 0.4s ease;
  }
  @keyframes shakeIn {
    0% { opacity: 0; transform: translateX(-8px); }
    100% { opacity: 1; transform: translateX(0); }
  }
  .disqualify-icon { font-size: 28px; flex-shrink: 0; }
  .disqualify-title { font-weight: 700; color: var(--dt-red); margin-bottom: 4px; }
  .disqualify-text { font-size: 13px; color: var(--dt-muted); line-height: 1.6; }

  /* Result Card */
  .result-card {
    background: linear-gradient(135deg, rgba(22,22,30,0.97), rgba(245,166,35,0.04));
    border: 1px solid rgba(245,166,35,0.25);
    border-radius: 20px;
    padding: 40px;
    text-align: center;
    position: relative;
    overflow: hidden;
    animation: fadeUp 0.5s ease both;
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
  }
  .result-card::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--dt-accent), var(--dt-teal), var(--dt-accent));
    background-size: 200%;
    animation: shimmer 2s linear infinite;
  }
  @keyframes shimmer { 0% { background-position: 0%; } 100% { background-position: 200%; } }

  .result-label {
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--dt-muted);
    font-family: 'JetBrains Mono', monospace;
    margin-bottom: 12px;
  }
  .result-range {
    font-family: 'Bebas Neue', sans-serif;
    font-size: 72px;
    color: var(--dt-accent);
    line-height: 1;
    margin-bottom: 8px;
    letter-spacing: 0.02em;
  }
  .result-disclaimer {
    font-size: 13px;
    color: var(--dt-muted);
    margin-bottom: 28px;
    max-width: 360px;
    margin-left: auto;
    margin-right: auto;
    line-height: 1.6;
  }
  .result-details {
    display: flex;
    justify-content: center;
    gap: 24px;
    flex-wrap: wrap;
    margin-bottom: 32px;
  }
  .result-detail {
    background: var(--dt-surface);
    border: 1px solid var(--dt-border);
    border-radius: 10px;
    padding: 12px 18px;
    text-align: left;
  }
  .rd-label { font-size: 10px; color: var(--dt-muted); text-transform: uppercase; letter-spacing: 0.06em; margin-bottom: 3px; }
  .rd-value { font-size: 14px; font-weight: 600; color: var(--dt-text); }

  .cta-group {
    display: flex;
    gap: 12px;
    justify-content: center;
    flex-wrap: wrap;
  }
  .btn-primary {
    background: var(--dt-accent) !important;
    color: #000 !important;
    border: none;
    padding: 14px 32px;
    border-radius: 100px;
    font-weight: 700;
    font-size: 15px;
    cursor: pointer;
    transition: all 0.2s;
    font-family: 'DM Sans', sans-serif;
    letter-spacing: 0.02em;
  }
  .btn-primary:hover {
    background: #ffb733;
    transform: translateY(-1px);
    box-shadow: 0 8px 24px rgba(245,166,35,0.35);
  }
  .btn-secondary {
    background: transparent;
    color: var(--dt-text);
    border: 1px solid var(--dt-border);
    padding: 14px 28px;
    border-radius: 100px;
    font-weight: 500;
    font-size: 14px;
    cursor: pointer;
    transition: all 0.2s;
    font-family: 'DM Sans', sans-serif;
  }
  .btn-secondary:hover { border-color: var(--dt-muted); }

  .btn-next {
    background: var(--dt-accent) !important;
    color: #000 !important;
    border: none !important;
    text-transform: none !important;
    box-shadow: none !important;
    color: #000 !important;
    border: none !important;
    padding: 16px 36px !important;
    border-radius: 14px !important;
    font-weight: 700 !important;
    font-size: 15px !important;
    cursor: pointer !important;
    transition: all 0.2s !important;
    font-family: 'DM Sans', sans-serif !important;
    display: flex !important;
    align-items: center !important;
    justify-content: center !important;
    gap: 8px !important;
    width: 100% !important;
    margin-top: 16px !important;
    box-sizing: border-box !important;
    text-transform: none !important;
    letter-spacing: normal !important;
  }
  .btn-next:hover {
    background: #ffb733 !important;
    transform: translateY(-1px) !important;
    box-shadow: 0 8px 24px rgba(245,166,35,0.35) !important;
  }
  .btn-next:disabled {
    background: var(--dt-border) !important;
    color: var(--dt-muted) !important;
    cursor: not-allowed !important;
    transform: none !important;
    box-shadow: none !important;
  }

  /* Info chips */
  .info-row {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
    margin-bottom: 24px;
  }
  .info-chip {
    display: flex;
    align-items: center;
    gap: 6px;
    background: var(--dt-surface);
    border: 1px solid var(--dt-border);
    border-radius: 8px;
    padding: 6px 12px;
    font-size: 12px;
    color: var(--dt-muted);
  }
  .info-chip .dot { width: 6px; height: 6px; border-radius: 50%; }

  /* Dent count */
  .dent-count-row {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 28px;
  }
  .dent-count-label { font-weight: 500; font-size: 14px; }
  .count-ctrl {
    display: flex;
    align-items: center;
    gap: 0;
    background: var(--dt-surface);
    border: 1px solid var(--dt-border);
    border-radius: 100px;
    overflow: hidden;
  }
  .count-btn {
    background: var(--dt-surface) !important;
    border: none !important;
    color: var(--dt-text) !important;
    width: 38px !important;
    height: 38px !important;
    cursor: pointer !important;
    font-size: 18px !important;
    transition: background 0.2s !important;
    font-family: 'JetBrains Mono', monospace !important;
  }
  .count-btn:hover { background: var(--dt-border) !important; }
  .count-val {
    font-family: 'JetBrains Mono', monospace;
    font-size: 16px;
    font-weight: 600;
    min-width: 32px;
    text-align: center;
    color: var(--dt-accent);
  }

  /* Hidden */
  .step-content { display: none !important; }
  .step-content.active { display: block !important; animation: fadeUp 0.35s ease both; }

  @keyframes fadeUp {
    from { opacity: 0; transform: translateY(16px); }
    to { opacity: 1; transform: translateY(0); }
  }
  @keyframes fadeDown {
    from { opacity: 0; transform: translateY(-12px); }
    to { opacity: 1; transform: translateY(0); }
  }

  /* Responsive */
  @media (max-width: 640px) {
    .app { padding: 20px 12px 60px; }
    .header { margin-bottom: 20px; }
    h1 { font-size: 42px !important; line-height: 0.92; margin-bottom: 8px; }
    .logo-badge { font-size: 9px; padding: 5px 12px 5px 8px; margin-bottom: 16px; }
    .header-sub { font-size: 14px; }

    /* Progress track — compact on mobile */
    .progress-track { gap: 0; margin-bottom: 20px; }
    .step-circle { width: 34px; height: 34px; font-size: 12px; }
    .step-line { width: 18px; }
    .step-label { display: none; }

    /* Cards */
    .card { padding: 20px 16px; border-radius: 16px; }
    .card-title { font-size: 26px; margin-bottom: 4px; }
    .card-sub { font-size: 13px; margin-bottom: 20px; }

    /* Vehicle grid — 2 col on mobile */
    .vehicle-grid { grid-template-columns: repeat(2, 1fr); gap: 10px; }
    .vehicle-card { padding: 16px 10px 12px; }
    .vehicle-icon { font-size: 30px; margin-bottom: 6px; }
    .vehicle-name { font-size: 12px; }
    .vehicle-hint { font-size: 10px; }

    /* Dent sizes — 2 col */
    .dent-sizes { grid-template-columns: repeat(2, 1fr) !important; gap: 8px !important; }
    .dent-size-card { padding: 14px 10px 12px; }
    .dent-size-name { font-size: 12px; }
    .dent-size-desc { font-size: 10px; }

    /* Factor grid — 1 col */
    .factor-grid { grid-template-columns: 1fr; gap: 10px; }
    .factor-card { padding: 14px 16px; }

    /* Next button — full width on mobile */
    .btn-next { 
      width: 100%; 
      justify-content: center; 
      margin-top: 16px;
      padding: 16px;
      font-size: 15px;
      border-radius: 14px;
    }

    /* Result */
    .result-range { font-size: 48px !important; }
    .result-card { padding: 24px 16px; }
    .result-details { gap: 8px; }
    .result-detail { padding: 10px 12px; }
    .cta-group { flex-direction: column; }
    .btn-primary, .btn-secondary { width: 100%; text-align: center; justify-content: center; }

    /* Dent count row */
    .dent-count-row { flex-wrap: wrap; gap: 10px; }

    /* Car SVG */
    .car-view-tabs { flex-wrap: wrap; gap: 6px; }
    .view-tab { font-size: 11px; padding: 6px 12px; }
  }

  /* Extra small */
  @media (max-width: 380px) {
    h1 { font-size: 36px !important; }
    .vehicle-grid { grid-template-columns: repeat(2, 1fr); }
    .step-line { width: 10px; }
  }

  /* Checkmark SVG icon */
  .check-svg { display: none; }
  .step-node.done .step-num { display: none; }
  .step-node.done .check-svg { display: block; }

  /* Tooltip */
  .tip {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 16px; height: 16px;
    background: var(--dt-border);
    border-radius: 50%;
    font-size: 10px;
    color: var(--dt-muted);
    cursor: help;
    margin-left: 4px;
    vertical-align: middle;
    position: relative;
  }
  .tip:hover::after {
    content: attr(data-tip);
    position: absolute;
    bottom: 120%;
    left: 50%;
    transform: translateX(-50%);
    background: #222230;
    border: 1px solid var(--dt-border);
    color: var(--dt-text);
    font-size: 12px;
    white-space: nowrap;
    padding: 6px 12px;
    border-radius: 8px;
    z-index: 10;
    pointer-events: none;
  }

  /* Score bar */
  .score-meter {
    background: var(--dt-surface);
    border: 1px solid var(--dt-border);
    border-radius: 12px;
    padding: 16px 20px;
    margin-bottom: 24px;
  }
  .score-meter-label {
    font-size: 12px;
    color: var(--dt-muted);
    margin-bottom: 10px;
    display: flex;
    justify-content: space-between;
  }
  .score-track {
    height: 8px;
    background: var(--dt-border);
    border-radius: 100px;
    overflow: hidden;
  }
  .score-fill {
    height: 100%;
    border-radius: 100px;
    background: linear-gradient(90deg, var(--dt-teal), var(--dt-accent));
    transition: width 0.6s ease;
  }

  /* Language Toggle */
  .lang-toggle {
    position: fixed;
    bottom: 24px;
    right: 24px;
    z-index: 9999;
    display: flex;
    gap: 4px;
    background: rgba(16,16,24,0.95);
    border: 1px solid rgba(255,255,255,0.12);
    border-radius: 100px;
    padding: 4px;
    backdrop-filter: blur(12px);
    box-shadow: 0 4px 24px rgba(0,0,0,0.5);
  }
  .lang-btn {
    background: transparent;
    border: none;
    color: #888;
    font-family: 'DM Sans', sans-serif;
    font-size: 12px;
    font-weight: 600;
    padding: 6px 12px;
    border-radius: 100px;
    cursor: pointer;
    transition: all 0.2s;
    letter-spacing: 0.03em;
    white-space: nowrap;
  }
  .lang-btn:hover { color: #fff; background: rgba(255,255,255,0.08); }
  .lang-btn.active { background: var(--dt-accent); color: #000; }