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

      body {
        font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
        background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
        min-height: 100vh;
        padding: 20px;
      }

      .container {
        max-width: 600px;
        margin: 0 auto;
        background: rgba(255, 255, 255, 0.95);
        border-radius: 20px;
        box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
        overflow: hidden;
        backdrop-filter: blur(10px);
      }

      .header {
        background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
        color: white;
        padding: 30px;
        text-align: center;
        position: relative;
      }

      .header::before {
        content: "";
        position: absolute;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 20"><defs><radialGradient id="a" cx="50%" cy="40%" r="50%"><stop offset="0%" stop-color="white" stop-opacity="0.1"/><stop offset="100%" stop-color="white" stop-opacity="0"/></radialGradient></defs><rect width="100" height="20" fill="url(%23a)"/></svg>');
        opacity: 0.3;
      }

      .header h1 {
        font-size: 2.5em;
        margin-bottom: 10px;
        position: relative;
        z-index: 1;
      }

      .header p {
        font-size: 1.1em;
        opacity: 0.9;
        position: relative;
        z-index: 1;
      }

      .content {
        padding: 40px;
      }

      .nav-buttons {
        display: flex;
        gap: 15px;
        margin-bottom: 30px;
      }

      .nav-button {
        flex: 1;
        padding: 12px 20px;
        background: #f8f9fa;
        border: 2px solid #e9ecef;
        border-radius: 10px;
        color: #495057;
        text-decoration: none;
        text-align: center;
        font-weight: 600;
        transition: all 0.3s ease;
      }

      .nav-button:hover {
        background: #667eea;
        color: white;
        border-color: #667eea;
        transform: translateY(-2px);
        box-shadow: 0 5px 15px rgba(102, 126, 234, 0.3);
      }

      .section {
        margin-bottom: 30px;
        background: #f8f9fa;
        border-radius: 15px;
        padding: 25px;
        box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
      }

      .section h2 {
        color: #495057;
        margin-bottom: 20px;
        font-size: 1.4em;
        display: flex;
        align-items: center;
        gap: 10px;
      }

      .section h2::before {
        content: "";
        width: 4px;
        height: 25px;
        background: linear-gradient(135deg, #667eea, #764ba2);
        border-radius: 2px;
      }

      .form-group {
        margin-bottom: 20px;
      }

      .form-group label {
        display: block;
        margin-bottom: 8px;
        color: #495057;
        font-weight: 600;
      }

      .form-group input {
        width: 100%;
        padding: 12px 15px;
        border: 2px solid #e9ecef;
        border-radius: 10px;
        font-size: 16px;
        transition: all 0.3s ease;
      }

      .form-group input:focus {
        outline: none;
        border-color: #667eea;
        box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
      }

      .time-row {
        display: flex;
        gap: 15px;
        align-items: end;
      }

      .time-input {
        flex: 1;
      }

      .current-time {
        background: white;
        padding: 15px;
        border-radius: 10px;
        text-align: center;
        font-family: monospace;
        font-size: 18px;
        color: #495057;
        border: 2px solid #e9ecef;
        margin-bottom: 15px;
      }

      .button-group {
        display: flex;
        gap: 15px;
        flex-wrap: wrap;
      }

      .btn {
        padding: 15px 25px;
        border: none;
        border-radius: 12px;
        font-size: 16px;
        font-weight: 600;
        cursor: pointer;
        transition: all 0.3s ease;
        text-decoration: none;
        display: inline-block;
        text-align: center;
        min-width: 150px;
      }

      .btn-primary {
        background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
        color: white;
      }

      .btn-primary:hover {
        transform: translateY(-2px);
        box-shadow: 0 10px 25px rgba(102, 126, 234, 0.3);
      }

      .btn-secondary {
        background: linear-gradient(135deg, #74b9ff 0%, #0984e3 100%);
        color: white;
      }

      .btn-secondary:hover {
        transform: translateY(-2px);
        box-shadow: 0 10px 25px rgba(116, 185, 255, 0.3);
      }

      .btn-warning {
        background: linear-gradient(135deg, #ffecd2 0%, #fcb69f 100%);
        color: #d84315;
      }

      .btn-warning:hover {
        transform: translateY(-2px);
        box-shadow: 0 10px 25px rgba(252, 182, 159, 0.3);
      }

      .btn-danger {
        background: linear-gradient(135deg, #ff9a9e 0%, #fecfef 100%);
        color: #c62828;
      }

      .btn-danger:hover {
        transform: translateY(-2px);
        box-shadow: 0 10px 25px rgba(255, 154, 158, 0.3);
      }

      .btn-disabled {
        background: #e9ecef !important;
        color: #6c757d !important;
        cursor: not-allowed !important;
        transform: none !important;
        box-shadow: none !important;
      }

      .btn-disabled:hover {
        transform: none !important;
        box-shadow: none !important;
      }

      .restriction-notice {
        background: #fff3cd;
        color: #856404;
        padding: 15px;
        border-radius: 10px;
        border: 2px solid #ffeaa7;
        margin-bottom: 15px;
        font-weight: 600;
        text-align: center;
      }

      .status-message {
        margin-top: 20px;
        padding: 15px;
        border-radius: 10px;
        font-weight: 600;
        text-align: center;
        display: none;
      }

      .status-success {
        background: #d4edda;
        color: #155724;
        border: 2px solid #c3e6cb;
      }

      .status-error {
        background: #f8d7da;
        color: #721c24;
        border: 2px solid #f5c6cb;
      }

      .status-info {
        background: #cce7ff;
        color: #004085;
        border: 2px solid #b3d9ff;
      }

      .learning-mode {
        display: none;
        text-align: center;
        padding: 30px;
        background: linear-gradient(135deg, #ffecd2 0%, #fcb69f 100%);
        border-radius: 15px;
        margin-top: 20px;
      }

      .learning-mode h3 {
        color: #d84315;
        font-size: 1.5em;
        margin-bottom: 15px;
      }

      .learning-mode p {
        color: #bf360c;
        font-size: 1.2em;
        margin-bottom: 20px;
      }

      .pulse {
        animation: pulse 2s infinite;
      }

      @keyframes pulse {
        0% {
          transform: scale(1);
        }
        50% {
          transform: scale(1.05);
        }
        100% {
          transform: scale(1);
        }
      }

      @media (max-width: 600px) {
        .container {
          margin: 10px;
          border-radius: 15px;
        }

        .content {
          padding: 20px;
        }

        .nav-buttons {
          flex-direction: column;
        }

        .button-group {
          flex-direction: column;
        }

        .btn {
          width: 100%;
        }

        .time-row {
          flex-direction: column;
          gap: 10px;
        }
      }