:root {
      --primary-blue: #1a6df7;
      --secondary-blue: #0d4ba3;
      --accent-green: #2dd4bf;
      --accent-teal: #14ffec;
      --dark-bg: #0a0e17;
      --darker-bg: #070a12;
      --card-bg: #131a2a;
      --text-light: #e2e8f0;
      --text-muted: #94a3b8;
      --border-radius: 12px;
      --shadow: 0 4px 20px rgba(0, 0, 0, 0.25);
    }
    
    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }
    
    body {
      font-family: "Helvetica Neue", Arial, "Hiragino Sans", "Hiragino Kaku Gothic ProN", Meiryo, sans-serif;
      line-height: 1.6;
      color: var(--text-light);
      background: var(--dark-bg);
      min-height: 100vh;
      padding: 16px;
      display: flex;
      flex-direction: column;
      align-items: center;
      background-image: 
        radial-gradient(circle at 20% 30%, rgba(26, 109, 247, 0.15) 0%, transparent 40%),
        radial-gradient(circle at 80% 70%, rgba(45, 212, 191, 0.15) 0%, transparent 40%);
    }
    
    .sakura-container {
      width: 100%;
      max-width: 700px;
      margin: 0 auto;
      background: var(--card-bg);
      border-radius: var(--border-radius);
      box-shadow: var(--shadow);
      overflow: hidden;
      position: relative;
    }
    
    .sakura-header {
      background: linear-gradient(120deg, var(--darker-bg) 0%, #0f172a 100%);
      color: white;
      padding: 30px 20px;
      text-align: center;
      position: relative;
      overflow: hidden;
    }
    
    .sakura-header::before {
      content: "";
      position: absolute;
      top: 0;
      left: 0;
      right: 0;
      bottom: 0;
      background: 
        radial-gradient(circle at 20% 30%, rgba(26, 109, 247, 0.2) 0%, transparent 20%),
        radial-gradient(circle at 80% 20%, rgba(45, 212, 191, 0.2) 0%, transparent 20%);
      z-index: 1;
    }
    
    .circle-chart-container {
      position: relative;
      width: 180px;
      height: 180px;
      margin: 0 auto 20px;
      z-index: 2;
    }
    
    .circle-chart {
      width: 100%;
      height: 100%;
      transform: rotate(-90deg);
    }
    
    .circle-chart-bg {
      fill: none;
      stroke: rgba(255, 255, 255, 0.1);
      stroke-width: 6;
    }
    
    .circle-chart-progress {
      fill: none;
      stroke: var(--accent-teal);
      stroke-width: 6;
      stroke-linecap: round;
      stroke-dasharray: 339.3;
      stroke-dashoffset: 339.3;
      animation: progress-animation 2s ease-out forwards;
    }
    
    .circle-chart-inner {
      position: absolute;
      top: 50%;
      left: 50%;
      transform: translate(-50%, -50%);
      width: 140px;
      height: 140px;
      border-radius: 50%;
      background: linear-gradient(135deg, var(--primary-blue) 0%, var(--accent-green) 100%);
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      box-shadow: 0 0 0px rgba(45, 212, 191, 0.3);
    }
    
    .circle-chart-value {
      font-size: 28px;
      font-weight: 700;
      color: white;
    }
    
    .circle-chart-label {
      font-size: 14px;
      color: rgba(255, 255, 255, 0.8);
    }
    
    @keyframes progress-animation {
      to {
        stroke-dashoffset: 80;
      }
    }
    
    .sakura-title {
      font-size: 24px;
      margin-bottom: 8px;
      font-weight: 700;
      position: relative;
      z-index: 2;
    }
    
    .sakura-subtitle {
      font-size: 16px;
      opacity: 0.9;
      position: relative;
      z-index: 2;
    }
    
    .sakura-content {
      padding: 24px;
    }
    
    .sakura-input-group {
      display: flex;
      margin-bottom: 16px;
      gap: 12px;
    }
    
    .sakura-input {
      flex: 1;
      padding: 14px 16px;
      border: 2px solid #1e293b;
      border-radius: var(--border-radius);
      font-size: 16px;
      transition: all 0.3s;
      background: #1e293b;
      color: var(--text-light);
    }
    
    .sakura-input:focus {
      outline: none;
      border-color: var(--primary-blue);
      box-shadow: 0 0 0 3px rgba(26, 111, 247, 0.3);
    }
    
    .sakura-btn {
      background: var(--primary-blue);
      color: white;
      border: none;
      border-radius: var(--border-radius);
      padding: 0 24px;
      font-weight: 600;
      cursor: pointer;
      transition: all 0.3s;
    }
    
    .sakura-btn:hover {
      background: var(--secondary-blue);
      transform: translateY(-2px);
      box-shadow: 0 6px 12px rgba(0, 0, 0, 0.2);
    }
    
    .sakura-notice {
      display: block;
      text-align: center;
      color: var(--text-muted);
      font-size: 14px;
      margin-bottom: 24px;
    }
    
    .sakura-process {
      background: #1a243a;
      border-radius: var(--border-radius);
      padding: 20px;
      margin: 24px 0;
      position: relative;
    }
    
    .sakura-process-title {
      font-size: 18px;
      margin-bottom: 16px;
      color: var(--accent-green);
      display: flex;
      align-items: center;
      gap: 8px;
    }
    
    .sakura-steps {
      display: flex;
      justify-content: space-between;
      margin: 20px 0;
      position: relative;
    }
    
    .sakura-steps::before {
      content: "";
      position: absolute;
      top: 20px;
      left: 0;
      right: 0;
      height: 3px;
      background: #2d3748;
      z-index: 1;
    }
    
    .sakura-step {
      width: 40px;
      height: 40px;
      border-radius: 50%;
      background: var(--card-bg);
      border: 3px solid #2d3748;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: bold;
      color: var(--text-muted);
      position: relative;
      z-index: 2;
    }
    
    .sakura-step.active {
      background: var(--primary-blue);
      border-color: var(--primary-blue);
      color: white;
    }
    
    .sakura-step.completed {
      background: var(--accent-green);
      border-color: var(--accent-green);
      color: white;
    }
    
    .sakura-status {
      text-align: center;
      padding: 12px;
      background: #1e293b;
      border-radius: var(--border-radius);
      margin: 16px 0;
      font-size: 15px;
      min-height: 48px;
      display: flex;
      align-items: center;
      justify-content: center;
    }
    
    .sakura-analysis {
      background: #1a243a;
      border: 2px solid #2d3748;
      border-radius: var(--border-radius);
      padding: 20px;
      margin: 24px 0;
    }
    
    .sakura-analysis-title {
      font-size: 20px;
      color: var(--accent-green);
      margin-bottom: 16px;
      padding-bottom: 8px;
      border-bottom: 2px solid #2d3748;
    }
    
    .sakura-features {
      margin: 24px 0;
    }
    
    .sakura-feature {
      display: flex;
      align-items: flex-start;
      gap: 12px;
      margin-bottom: 16px;
    }
    
    .sakura-feature-icon {
      background: linear-gradient(135deg, var(--primary-blue) 0%, var(--accent-green) 100%);
      color: white;
      width: 32px;
      height: 32px;
      border-radius: 8px;
      display: flex;
      align-items: center;
      justify-content: center;
      flex-shrink: 0;
    }
    
    .sakura-footer {
      text-align: center;
      padding: 20px;
      background: #0f172a;
      border-top: 1px solid #1e293b;
      font-size: 14px;
      color: var(--text-muted);
    }
    
    .sakura-modal {
      display: none;
      position: fixed;
      top: 0;
      left: 0;
      right: 0;
      bottom: 0;
      background: rgba(0, 0, 0, 0.8);
      z-index: 100;
      align-items: center;
      justify-content: center;
    }
    
    .sakura-modal-content {
      background: var(--card-bg);
      border-radius: var(--border-radius);
      padding: 24px;
      width: 90%;
      max-width: 500px;
      text-align: center;
      box-shadow: 0 10px 30px rgba(0, 0, 0, 0.4);
      border: 1px solid #2d3748;
    }
    
    .sakura-modal-title {
      font-size: 22px;
      color: var(--accent-green);
      margin-bottom: 16px;
    }
    
    .sakura-modal-text {
      margin-bottom: 24px;
      line-height: 1.6;
      color: var(--text-light);
    }
    
    .sakura-modal-btn {
      background: linear-gradient(135deg, var(--primary-blue) 0%, var(--accent-green) 100%);
      color: white;
      border: none;
      border-radius: var(--border-radius);
      padding: 12px 24px;
      font-size: 16px;
      font-weight: 600;
      cursor: pointer;
      display: inline-block;
      margin-bottom: 12px;
      text-decoration: none;
      transition: all 0.3s;
    }
    
    .sakura-modal-btn:hover {
      transform: translateY(-2px);
      box-shadow: 0 6px 12px rgba(0, 0, 0, 0.3);
    }
    
    @media (max-width: 600px) {
      .sakura-input-group {
        flex-direction: column;
      }
      
      .sakura-btn {
        width: 100%;
        padding: 14px;
      }
      
      .circle-chart-container {
        width: 150px;
        height: 150px;
      }
      
      .circle-chart-inner {
        width: 110px;
        height: 110px;
      }
    }