:root {
      --gold-primary: #D4AF37;
      --gold-light: #F4E4BC;
      --gold-dark: #996515;
      --black-primary: #0D0D0D;
      --black-secondary: #1A1A1A;
      --black-tertiary: #2D2D2D;
      --white: #FFFFFF;
      --gray-light: #A0A0A0;
      --success: #4CAF50;
      --error: #FF5252;
    }

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

    body {
      font-family: 'Sarabun', sans-serif;
      background: var(--black-primary);
      color: var(--white);
      min-height: 100vh;
      overflow-x: hidden;
    }

    body::before {
      content: '';
      position: fixed;
      top: 0;
      left: 0;
      right: 0;
      bottom: 0;
      background: 
        radial-gradient(ellipse at 20% 20%, rgba(212, 175, 55, 0.08) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 80%, rgba(212, 175, 55, 0.05) 0%, transparent 50%),
        linear-gradient(180deg, var(--black-primary) 0%, var(--black-secondary) 100%);
      pointer-events: none;
      z-index: -1;
    }

    .container {
      max-width: 480px;
      margin: 0 auto;
      padding: 20px;
      min-height: 100vh;
      display: flex;
      flex-direction: column;
    }

    /* Header */
    .header {
      text-align: center;
      padding: 30px 0 20px;
      border-bottom: 1px solid rgba(212, 175, 55, 0.2);
      margin-bottom: 30px;
    }

    .header-subtitle {
      font-size: 11px;
      letter-spacing: 4px;
      color: var(--gold-primary);
      text-transform: uppercase;
      margin-bottom: 15px;
      font-weight: 500;
    }

    .header-title {
      font-family: 'Playfair Display', serif;
      font-size: 28px;
      font-weight: 600;
      margin-bottom: 10px;
    }

    .header-title span {
      color: var(--gold-primary);
    }

    .header-desc {
      font-size: 13px;
      color: var(--gray-light);
      line-height: 1.6;
    }

    /* Progress Steps */
    .progress-container {
      display: flex;
      justify-content: space-between;
      align-items: center;
      margin-bottom: 35px;
      padding: 0 10px;
    }

    .step {
      display: flex;
      align-items: center;
      gap: 8px;
      opacity: 0.4;
      transition: all 0.3s ease;
    }

    .step.active {
      opacity: 1;
    }

    .step.completed {
      opacity: 0.7;
    }

    .step-number {
      width: 28px;
      height: 28px;
      border-radius: 50%;
      border: 2px solid var(--gold-primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 12px;
      font-weight: 600;
      color: var(--gold-primary);
      transition: all 0.3s ease;
    }

    .step.active .step-number {
      background: var(--gold-primary);
      color: var(--black-primary);
    }

    .step.completed .step-number {
      background: var(--gold-primary);
      color: var(--black-primary);
    }

    .step-label {
      font-size: 11px;
      color: var(--white);
      display: none;
    }

    @media (min-width: 400px) {
      .step-label {
        display: block;
      }
    }

    .step-line {
      flex: 1;
      height: 1px;
      background: rgba(212, 175, 55, 0.3);
      margin: 0 5px;
    }

    /* Form Steps */
    .form-step {
      display: none;
      animation: fadeIn 0.4s ease;
      flex: 1;
    }

    .form-step.active {
      display: block;
    }

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

    /* Section Title */
    .section-title {
      font-size: 18px;
      font-weight: 600;
      margin-bottom: 20px;
      display: flex;
      align-items: center;
      gap: 10px;
    }

    .section-title::before {
      content: '';
      width: 4px;
      height: 20px;
      background: var(--gold-primary);
      border-radius: 2px;
    }

    /* Service Cards */
    .service-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 12px;
    }

    @media (max-width: 400px) {
      .service-grid {
        grid-template-columns: 1fr;
      }
    }

    .service-card {
      background: var(--black-secondary);
      border: 1px solid rgba(212, 175, 55, 0.2);
      border-radius: 12px;
      padding: 18px 15px;
      cursor: pointer;
      transition: all 0.3s ease;
      position: relative;
      overflow: hidden;
      text-align: center;
    }

    .service-card::before {
      content: '';
      position: absolute;
      top: 0;
      left: 0;
      right: 0;
      bottom: 0;
      background: linear-gradient(135deg, rgba(212, 175, 55, 0.1) 0%, transparent 50%);
      opacity: 0;
      transition: opacity 0.3s ease;
    }

    .service-card:hover {
      border-color: var(--gold-primary);
      transform: translateY(-2px);
    }

    .service-card:hover::before {
      opacity: 1;
    }

    .service-card.selected {
      border-color: var(--gold-primary);
      background: linear-gradient(135deg, rgba(212, 175, 55, 0.15) 0%, var(--black-secondary) 100%);
    }

    .service-card.selected::after {
      content: '✓';
      position: absolute;
      top: 10px;
      right: 10px;
      width: 22px;
      height: 22px;
      background: var(--gold-primary);
      color: var(--black-primary);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 11px;
      font-weight: bold;
    }

    .service-icon {
      font-size: 28px;
      margin-bottom: 8px;
    }

    .service-name {
      font-size: 14px;
      font-weight: 600;
      color: var(--white);
      line-height: 1.4;
    }

    /* Calendar */
    .calendar-container {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 20px;
    }

    @media (max-width: 450px) {
      .calendar-container {
        grid-template-columns: 1fr;
      }
    }

    .calendar-box, .time-box {
      background: var(--black-secondary);
      border: 1px solid rgba(212, 175, 55, 0.2);
      border-radius: 12px;
      padding: 15px;
    }

    .calendar-header {
      display: flex;
      justify-content: space-between;
      align-items: center;
      margin-bottom: 15px;
    }

    .calendar-title {
      font-size: 14px;
      font-weight: 500;
      display: flex;
      align-items: center;
      gap: 8px;
    }

    .calendar-title svg {
      width: 18px;
      height: 18px;
      fill: var(--gold-primary);
    }

    .calendar-nav {
      display: flex;
      align-items: center;
      gap: 10px;
    }

    .calendar-nav button {
      background: none;
      border: 1px solid rgba(212, 175, 55, 0.3);
      color: var(--gold-primary);
      width: 28px;
      height: 28px;
      border-radius: 6px;
      cursor: pointer;
      display: flex;
      align-items: center;
      justify-content: center;
      transition: all 0.2s ease;
    }

    .calendar-nav button:hover {
      background: rgba(212, 175, 55, 0.1);
    }

    .calendar-month {
      font-size: 13px;
      font-weight: 500;
    }

    .calendar-grid {
      display: grid;
      grid-template-columns: repeat(7, 1fr);
      gap: 4px;
    }

    .calendar-day-name {
      font-size: 10px;
      color: var(--gray-light);
      text-align: center;
      padding: 5px 0;
    }

    .calendar-day {
      aspect-ratio: 1;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 13px;
      border-radius: 8px;
      cursor: pointer;
      transition: all 0.2s ease;
      border: 1px solid transparent;
    }

    .calendar-day:hover:not(.disabled):not(.empty) {
      background: rgba(212, 175, 55, 0.2);
    }

    .calendar-day.selected {
      background: var(--gold-primary);
      color: var(--black-primary);
      font-weight: 600;
    }

    .calendar-day.today {
      border-color: var(--gold-primary);
    }

    .calendar-day.disabled {
      color: var(--black-tertiary);
      cursor: not-allowed;
    }

    .calendar-day.empty {
      cursor: default;
    }

    /* Time Slots */
    .time-header {
      font-size: 14px;
      font-weight: 500;
      margin-bottom: 10px;
      display: flex;
      align-items: center;
      gap: 8px;
    }

    .time-header svg {
      width: 18px;
      height: 18px;
      fill: var(--gold-primary);
    }

    .selected-date {
      font-size: 12px;
      color: var(--gray-light);
      margin-bottom: 15px;
    }

    .time-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 8px;
      margin-bottom: 15px;
    }

    .time-slot {
      padding: 12px;
      text-align: center;
      border: 1px solid rgba(212, 175, 55, 0.2);
      border-radius: 8px;
      font-size: 14px;
      cursor: pointer;
      transition: all 0.2s ease;
    }

    .time-slot:hover:not(.disabled) {
      border-color: var(--gold-primary);
      background: rgba(212, 175, 55, 0.1);
    }

    .time-slot.selected {
      background: var(--gold-primary);
      color: var(--black-primary);
      font-weight: 600;
      border-color: var(--gold-primary);
    }

    .time-slot.disabled {
      opacity: 0.3;
      cursor: not-allowed;
      text-decoration: line-through;
    }

    /* Custom Time */
    .custom-time-section {
      margin-top: 15px;
      padding-top: 15px;
      border-top: 1px solid rgba(212, 175, 55, 0.2);
    }

    .custom-time-label {
      font-size: 12px;
      color: var(--gray-light);
      margin-bottom: 8px;
    }

    .custom-time-input {
      width: 100%;
      padding: 12px;
      background: var(--black-tertiary);
      border: 1px solid rgba(212, 175, 55, 0.2);
      border-radius: 8px;
      color: var(--white);
      font-size: 14px;
      font-family: 'Sarabun', sans-serif;
      text-align: center;
    }

    .custom-time-input:focus {
      outline: none;
      border-color: var(--gold-primary);
    }

    /* Form Inputs */
    .form-group {
      margin-bottom: 20px;
    }

    .form-label {
      display: block;
      font-size: 13px;
      font-weight: 500;
      margin-bottom: 8px;
      color: var(--white);
    }

    .form-label span {
      color: var(--error);
    }

    .form-input, .form-textarea, .form-select {
      width: 100%;
      padding: 14px 16px;
      background: var(--black-secondary);
      border: 1px solid rgba(212, 175, 55, 0.2);
      border-radius: 10px;
      color: var(--white);
      font-size: 15px;
      font-family: 'Sarabun', sans-serif;
      transition: all 0.2s ease;
    }

    .form-select {
      cursor: pointer;
      appearance: none;
      background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='%23D4AF37' viewBox='0 0 16 16'%3E%3Cpath d='M8 11L3 6h10l-5 5z'/%3E%3C/svg%3E");
      background-repeat: no-repeat;
      background-position: right 15px center;
    }

    .form-select option {
      background: var(--black-secondary);
      color: var(--white);
    }

    .form-input:focus, .form-textarea:focus, .form-select:focus {
      outline: none;
      border-color: var(--gold-primary);
      box-shadow: 0 0 0 3px rgba(212, 175, 55, 0.1);
    }

    .form-input::placeholder, .form-textarea::placeholder {
      color: var(--gray-light);
    }

    .form-textarea {
      min-height: 100px;
      resize: vertical;
    }

    /* Dynamic Form Fields */
    .dynamic-field {
      display: none;
    }

    .dynamic-field.show {
      display: block;
    }

    /* Summary */
    .summary-card {
      background: var(--black-secondary);
      border: 1px solid rgba(212, 175, 55, 0.3);
      border-radius: 12px;
      padding: 20px;
      margin-bottom: 20px;
    }

    .summary-row {
      display: flex;
      justify-content: space-between;
      padding: 12px 0;
      border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    }

    .summary-row:last-child {
      border-bottom: none;
    }

    .summary-label {
      color: var(--gray-light);
      font-size: 13px;
    }

    .summary-value {
      font-weight: 500;
      font-size: 14px;
      text-align: right;
      max-width: 60%;
    }

    /* Buttons */
    .btn-container {
      display: flex;
      gap: 12px;
      margin-top: auto;
      padding-top: 30px;
    }

    .btn {
      flex: 1;
      padding: 16px 24px;
      border-radius: 10px;
      font-size: 15px;
      font-weight: 600;
      font-family: 'Sarabun', sans-serif;
      cursor: pointer;
      transition: all 0.3s ease;
      border: none;
    }

    .btn-secondary {
      background: transparent;
      border: 1px solid rgba(212, 175, 55, 0.3);
      color: var(--white);
    }

    .btn-secondary:hover {
      border-color: var(--gold-primary);
      background: rgba(212, 175, 55, 0.1);
    }

    .btn-primary {
      background: linear-gradient(135deg, var(--gold-primary) 0%, var(--gold-dark) 100%);
      color: var(--black-primary);
      box-shadow: 0 4px 15px rgba(212, 175, 55, 0.3);
    }

    .btn-primary:hover {
      transform: translateY(-2px);
      box-shadow: 0 6px 20px rgba(212, 175, 55, 0.4);
    }

    .btn-primary:disabled {
      opacity: 0.5;
      cursor: not-allowed;
      transform: none;
    }

    /* Success Screen */
    .success-screen {
      display: none;
      text-align: center;
      padding: 40px 20px;
      animation: fadeIn 0.5s ease;
    }

    .success-screen.active {
      display: block;
    }

    .success-icon {
      width: 80px;
      height: 80px;
      background: linear-gradient(135deg, var(--gold-primary) 0%, var(--gold-dark) 100%);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      margin: 0 auto 25px;
      animation: scaleIn 0.5s ease;
    }

    @keyframes scaleIn {
      0% { transform: scale(0); }
      50% { transform: scale(1.1); }
      100% { transform: scale(1); }
    }

    .success-icon svg {
      width: 40px;
      height: 40px;
      fill: var(--black-primary);
    }

    .success-title {
      font-family: 'Playfair Display', serif;
      font-size: 24px;
      margin-bottom: 10px;
    }

    .success-desc {
      color: var(--gray-light);
      font-size: 14px;
      line-height: 1.6;
      margin-bottom: 30px;
    }

    .success-details {
      background: var(--black-secondary);
      border: 1px solid rgba(212, 175, 55, 0.2);
      border-radius: 12px;
      padding: 20px;
      text-align: left;
      margin-bottom: 30px;
    }

    .success-detail-row {
      display: flex;
      justify-content: space-between;
      padding: 10px 0;
    }

    .success-detail-label {
      color: var(--gray-light);
      font-size: 13px;
    }

    .success-detail-value {
      font-weight: 500;
      font-size: 14px;
      color: var(--gold-light);
    }

    /* Loading */
    .loading {
      display: none;
      position: fixed;
      top: 0;
      left: 0;
      right: 0;
      bottom: 0;
      background: rgba(0, 0, 0, 0.8);
      z-index: 1000;
      align-items: center;
      justify-content: center;
    }

    .loading.active {
      display: flex;
    }

    .spinner {
      width: 50px;
      height: 50px;
      border: 3px solid rgba(212, 175, 55, 0.2);
      border-top-color: var(--gold-primary);
      border-radius: 50%;
      animation: spin 1s linear infinite;
    }

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

    /* Line Profile */
    .line-profile {
      display: flex;
      align-items: center;
      gap: 12px;
      padding: 15px;
      background: var(--black-secondary);
      border: 1px solid rgba(212, 175, 55, 0.2);
      border-radius: 10px;
      margin-bottom: 20px;
    }

    .line-avatar {
      width: 45px;
      height: 45px;
      border-radius: 50%;
      border: 2px solid var(--gold-primary);
    }

    .line-name {
      font-weight: 500;
      font-size: 15px;
    }

    .line-status {
      font-size: 12px;
      color: var(--success);
      display: flex;
      align-items: center;
      gap: 5px;
    }

    .line-status::before {
      content: '';
      width: 6px;
      height: 6px;
      background: var(--success);
      border-radius: 50%;
    }

    /* Service Info Box */
    .service-info-box {
      background: rgba(212, 175, 55, 0.1);
      border: 1px solid rgba(212, 175, 55, 0.3);
      border-radius: 10px;
      padding: 15px;
      margin-bottom: 20px;
      display: flex;
      align-items: center;
      gap: 12px;
    }

    .service-info-icon {
      font-size: 24px;
    }

    .service-info-text {
      font-size: 14px;
      font-weight: 500;
      color: var(--gold-light);
    }