:root {
      --primary-color: #3b82f6;
      --primary-dark: #2563eb;
      --accent: #10b981;
      --background: #f1f5f9;
      --white: #ffffff;
      --gray: #e5e7eb;
      --gray-text: #6b7280;
      --text: #1f2937;
      --radius: 16px;
      --transition: 0.3s ease;
    }

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

    body {
      font-family: 'Inter', sans-serif;
      background: var(--background);
      display: flex;
      justify-content: center;
      align-items: center;
      min-height: 100vh;
      padding: 20px;
    }

    .container {
      background: var(--white);
      padding: 48px 36px;
      border-radius: var(--radius);
      box-shadow: 0 20px 40px rgba(0, 0, 0, 0.06);
      width: 100%;
      max-width: 480px;
      text-align: center;
      animation: fadeIn 0.5s ease forwards;
    }

    @keyframes fadeIn {
      from {
        opacity: 0;
        transform: translateY(20px);
      }
      to {
        opacity: 1;
        transform: translateY(0);
      }
    }

    h2 {
      font-size: 26px;
      color: var(--text);
      margin-bottom: 20px;
    }

    p.subtext {
      font-size: 14px;
      color: var(--gray-text);
      margin-bottom: 28px;
      line-height: 1.5;
    }

    /* Tab Navigation */
    .tab-navigation {
      display: flex;
      gap: 8px;
      margin-bottom: 24px;
      background: #f9fafb;
      padding: 6px;
      border-radius: 12px;
    }

    .tab-btn {
      flex: 1;
      padding: 12px 16px;
      font-size: 14px;
      font-weight: 600;
      color: var(--gray-text);
      background: transparent;
      border: none;
      border-radius: 8px;
      cursor: pointer;
      transition: all var(--transition);
    }

    .tab-btn:hover {
      background: rgba(59, 130, 246, 0.1);
      color: var(--primary-color);
    }

    .tab-btn.active {
      background: var(--white);
      color: var(--primary-color);
      box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
    }

    /* Tab Content */
    .tab-content {
      position: relative;
    }

    .tab-pane {
      display: none;
      animation: slideIn 0.3s ease forwards;
    }

    .tab-pane.active {
      display: block;
    }

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

    input[type="text"] {
      width: 100%;
      padding: 14px 16px;
      font-size: 15px;
      border: 1.5px solid var(--gray);
      border-radius: 12px;
      background-color: #f9fafb;
      margin-bottom: 16px;
      transition: border var(--transition), box-shadow var(--transition);
    }

    input[type="text"]:focus {
      outline: none;
      border-color: var(--primary-color);
      box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.2);
      background-color: #fff;
    }

    button {
      width: 100%;
      padding: 14px;
      font-size: 16px;
      font-weight: 600;
      color: var(--white);
      background: var(--primary-color);
      border: none;
      border-radius: 12px;
      cursor: pointer;
      transition: background-color var(--transition), transform 0.2s;
    }

    button:hover {
      background-color: var(--primary-dark);
      transform: translateY(-1px);
    }

    button:active {
      transform: translateY(0);
    }

    .footer-links {
      margin-top: 28px;
      display: flex;
      justify-content: center;
      font-size: 14px;
    }

    .footer-links a {
      color: var(--primary-color);
      text-decoration: none;
      font-weight: 500;
      transition: color var(--transition);
    }

    .footer-links a:hover {
      color: var(--primary-dark);
      text-decoration: underline;
    }

    @media (max-width: 480px) {
      .container {
        padding: 36px 24px;
        margin: 20px;
      }

      h2 {
        font-size: 22px;
      }

      .tab-btn {
        font-size: 13px;
        padding: 10px 12px;
      }
    }