:root {
    --bg: #0a0a0a;
    --surface: #111111;
    --card: #1a1a1a;
    --accent: #e8ff47;
    --accent2: #ff4747;
    --text: #f0f0f0;
    --muted: #555;
    --border: #2a2a2a;
  }

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

  body {
    background: var(--bg);
    color: var(--text);
    font-family: 'Noto Sans KR', sans-serif;
    min-height: 100vh;
    overflow-x: hidden;
  }

  /* HEADER */
  header {
    padding: 24px 32px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    background: rgba(10,10,10,0.95);
    backdrop-filter: blur(10px);
    z-index: 100;
  }

  .logo {
    font-family: 'Black Han Sans', sans-serif;
    font-size: 28px;
    letter-spacing: 4px;
    color: var(--accent);
    text-shadow: 0 0 30px rgba(232,255,71,0.4);
  }

  .logo span { color: var(--text); }

  .header-tag {
    font-size: 11px;
    letter-spacing: 2px;
    color: var(--muted);
    text-transform: uppercase;
  }

  /* MAIN LAYOUT */
  .main {
    display: grid;
    grid-template-columns: 1fr 380px;
    min-height: calc(100vh - 73px);
  }

  /* LEFT — BODY FIGURE */
  .body-section {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 40px 20px;
    position: relative;
    border-right: 1px solid var(--border);
  }

  .section-label {
    font-size: 11px;
    letter-spacing: 3px;
    color: var(--muted);
    text-transform: uppercase;
    margin-bottom: 32px;
  }

  .body-container {
    position: relative;
    width: 280px;
    height: 480px;
  }

  /* SVG BODY */
  .body-svg {
    width: 100%;
    height: 100%;
  }

  /* Hotspot buttons */
  .hotspot {
    position: absolute;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    border: 2px solid var(--accent);
    background: rgba(232,255,71,0.1);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 10px;
    font-weight: 700;
    color: var(--accent);
    transition: all 0.2s;
    transform: translate(-50%, -50%);
    z-index: 10;
  }

  .hotspot:hover, .hotspot.active {
    background: var(--accent);
    color: var(--bg);
    box-shadow: 0 0 20px rgba(232,255,71,0.5);
    transform: translate(-50%, -50%) scale(1.15);
  }

  .hotspot.filled {
    border-color: #47ff8a;
    background: rgba(71,255,138,0.15);
    color: #47ff8a;
  }

  .hotspot.filled:hover {
    background: #47ff8a;
    color: var(--bg);
  }

  /* Hotspot pulse animation */
  .hotspot::after {
    content: '';
    position: absolute;
    width: 100%;
    height: 100%;
    border-radius: 50%;
    border: 2px solid var(--accent);
    animation: pulse 2s infinite;
    opacity: 0;
  }

  .hotspot.filled::after { border-color: #47ff8a; }

  @keyframes pulse {
    0% { transform: scale(1); opacity: 0.8; }
    100% { transform: scale(1.8); opacity: 0; }
  }

  /* Tooltip */
  .hotspot-label {
    position: absolute;
    font-size: 10px;
    letter-spacing: 1px;
    color: var(--muted);
    white-space: nowrap;
    pointer-events: none;
  }

  /* RIGHT — PANEL */
  .panel {
    display: flex;
    flex-direction: column;
    background: var(--surface);
  }

  .panel-header {
    padding: 32px 28px 20px;
    border-bottom: 1px solid var(--border);
  }

  .panel-title {
    font-family: 'Black Han Sans', sans-serif;
    font-size: 22px;
    letter-spacing: 2px;
    margin-bottom: 6px;
  }

  .panel-subtitle {
    font-size: 12px;
    color: var(--muted);
    line-height: 1.6;
  }

  /* Input form */
  .input-area {
    flex: 1;
    padding: 28px;
    overflow-y: auto;
  }

  .input-placeholder {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 200px;
    border: 1px dashed var(--border);
    border-radius: 12px;
    color: var(--muted);
    font-size: 13px;
    text-align: center;
    line-height: 2;
  }

  .input-placeholder .arrow {
    font-size: 28px;
    margin-bottom: 12px;
    animation: bounce 1.5s infinite;
  }

  @keyframes bounce {
    0%, 100% { transform: translateX(-8px); }
    50% { transform: translateX(8px); }
  }

  /* Measurement form */
  .measurement-form { display: none; }
  .measurement-form.visible { display: block; }

  .form-title {
    font-family: 'Black Han Sans', sans-serif;
    font-size: 18px;
    letter-spacing: 2px;
    color: var(--accent);
    margin-bottom: 6px;
  }

  .form-desc {
    font-size: 12px;
    color: var(--muted);
    margin-bottom: 20px;
    line-height: 1.7;
  }

  .input-group {
    margin-bottom: 16px;
  }

  .input-label {
    font-size: 11px;
    letter-spacing: 1.5px;
    color: var(--muted);
    text-transform: uppercase;
    margin-bottom: 8px;
    display: block;
  }

  .input-field {
    width: 100%;
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 12px 16px;
    color: var(--text);
    font-family: 'Noto Sans KR', sans-serif;
    font-size: 14px;
    outline: none;
    transition: border-color 0.2s;
  }

  .input-field:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(232,255,71,0.1);
  }

  .input-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
  }

  /* Radio buttons */
  .radio-group {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
  }

  .radio-btn {
    flex: 1;
    min-width: 70px;
    padding: 10px;
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 8px;
    text-align: center;
    cursor: pointer;
    font-size: 13px;
    color: var(--muted);
    transition: all 0.2s;
  }

  .radio-btn:hover { border-color: var(--accent); color: var(--text); }
  .radio-btn.selected { border-color: var(--accent); background: rgba(232,255,71,0.1); color: var(--accent); }

  /* Save button */
  .save-btn {
    width: 100%;
    padding: 14px;
    background: var(--accent);
    color: var(--bg);
    border: none;
    border-radius: 10px;
    font-family: 'Black Han Sans', sans-serif;
    font-size: 16px;
    letter-spacing: 2px;
    cursor: pointer;
    margin-top: 20px;
    transition: all 0.2s;
  }

  .save-btn:hover {
    background: #f5ff80;
    box-shadow: 0 4px 20px rgba(232,255,71,0.4);
    transform: translateY(-1px);
  }

  /* Saved data display */
  .saved-list {
    padding: 28px;
    border-top: 1px solid var(--border);
    overflow-y: auto;
    max-height: 280px;
  }

  .saved-list-title {
    font-size: 11px;
    letter-spacing: 3px;
    color: var(--muted);
    text-transform: uppercase;
    margin-bottom: 16px;
  }

  .saved-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 0;
    border-bottom: 1px solid var(--border);
    font-size: 13px;
    animation: slideIn 0.3s ease;
  }

  @keyframes slideIn {
    from { opacity: 0; transform: translateX(10px); }
    to { opacity: 1; transform: translateX(0); }
  }

  .saved-item-label { color: var(--muted); font-size: 11px; letter-spacing: 1px; }
  .saved-item-value { color: var(--accent); font-weight: 700; }

  /* Progress bar */
  .progress-bar {
    padding: 20px 28px;
    border-top: 1px solid var(--border);
  }

  .progress-label {
    display: flex;
    justify-content: space-between;
    font-size: 11px;
    color: var(--muted);
    letter-spacing: 1px;
    margin-bottom: 10px;
  }

  .progress-track {
    height: 4px;
    background: var(--border);
    border-radius: 2px;
    overflow: hidden;
  }

  .progress-fill {
    height: 100%;
    background: var(--accent);
    border-radius: 2px;
    transition: width 0.5s ease;
  }

  /* Bottom CTA */
  .cta-section {
    padding: 20px 28px;
    border-top: 1px solid var(--border);
  }

  .cta-btn {
    width: 100%;
    padding: 16px;
    background: transparent;
    color: var(--text);
    border: 1px solid var(--border);
    border-radius: 10px;
    font-family: 'Black Han Sans', sans-serif;
    font-size: 14px;
    letter-spacing: 2px;
    cursor: pointer;
    transition: all 0.2s;
    margin-bottom: 10px;
  }

  .cta-btn:hover { border-color: var(--text); background: rgba(255,255,255,0.05); }

  .cta-btn.primary {
    background: var(--accent2);
    border-color: var(--accent2);
    color: white;
  }

  .cta-btn.primary:hover { background: #ff6666; box-shadow: 0 4px 20px rgba(255,71,71,0.4); }

  /* Toast */
  .toast {
    position: fixed;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%) translateY(80px);
    background: var(--accent);
    color: var(--bg);
    padding: 12px 24px;
    border-radius: 100px;
    font-size: 13px;
    font-weight: 700;
    letter-spacing: 1px;
    transition: transform 0.3s;
    z-index: 999;
    white-space: nowrap;
  }

  .toast.show { transform: translateX(-50%) translateY(0); }

  /* Mobile */
  @media (max-width: 768px) {
    .main { grid-template-columns: 1fr; }
    .body-section { border-right: none; border-bottom: 1px solid var(--border); padding: 30px 20px; }
    .panel { min-height: auto; }
    .body-container { width: 220px; height: 380px; }
  }