* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
        }

        body {
            background-color: #121212;
            display: flex;
            justify-content: center;
            align-items: center;
            min-height: 100vh;
        }

        .mobile-container {
            position: relative;
            width: 375px;
            background-color: #121212;
            border-radius: 40px;
            overflow: hidden;
            box-shadow: 0 10px 25px rgba(0, 0, 0, 0.5);
            border: 12px solid #000;
            min-height: 812px;
        }

        .status-bar {
            height: 44px;
            background-color: #000;
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 0 20px;
            color: white;
            font-size: 14px;
        }

        .screen {
            display: none;
            overflow-y: auto;
            padding: 20px;
            color: #e0e0e0;
            min-height: calc(812px - 56px);
        }

        .screen.active {
            display: block;
        }

        .header {
            text-align: center;
            margin-bottom: 30px;
            padding-top: 20px;
        }

        .app-icon {
            width: 60px;
            height: 60px;
            background-color: #3c78d8;
            border-radius: 14px;
            margin: 0 auto 15px;
            display: flex;
            justify-content: center;
            align-items: center;
            color: white;
            font-weight: bold;
            font-size: 24px;
        }

        h1 {
            font-size: 24px;
            color: #fff;
            margin-bottom: 8px;
        }

        h3 {
            color: #fff;
        }

        p {
            font-size: 15px;
            color: #aaa;
            margin-bottom: 20px;
        }

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

        label {
            display: block;
            font-size: 14px;
            color: #bbb;
            margin-bottom: 8px;
            font-weight: 500;
        }

        input {
            width: 100%;
            padding: 15px;
            border: 1px solid #333;
            border-radius: 8px;
            font-size: 16px;
            background-color: #1e1e1e;
            color: #e0e0e0;
        }

        input:focus {
            outline: none;
            border-color: #3c78d8;
            background-color: #2a2a2a;
        }

        .btn {
            width: 100%;
            padding: 16px;
            background-color: #3c78d8;
            color: white;
            border: none;
            border-radius: 8px;
            font-size: 16px;
            font-weight: 600;
            cursor: pointer;
            margin-top: 10px;
            box-shadow: 0 2px 5px rgba(0, 0, 0, 0.3);
            transition: opacity 0.2s;
        }

        .btn:hover:not(:disabled) {
            opacity: 0.9;
        }

        .btn-alt {
            background-color: #5e35b1;
        }

        .btn-outline {
            background-color: transparent;
            border: 2px solid #3c78d8;
            color: #3c78d8;
        }

        .btn:disabled {
            opacity: 0.5;
            cursor: not-allowed;
        }

        .address-box {
            background-color: #1e1e1e;
            padding: 15px;
            border-radius: 8px;
            font-family: monospace;
            font-size: 12px;
            word-break: break-all;
            margin-bottom: 20px;
            border: 1px dashed #444;
            color: #e0e0e0;
            max-height: 100px;
            overflow-y: auto;
        }

        .transaction-option {
            border: 1px solid #333;
            border-radius: 12px;
            padding: 20px;
            margin-bottom: 15px;
            background-color: #1e1e1e;
        }

        .transaction-option h3 {
            font-size: 18px;
            margin-bottom: 10px;
            display: flex;
            align-items: center;
            color: #fff;
        }

        .delay-badge {
            background-color: #2a2a2a;
            padding: 5px 10px;
            border-radius: 12px;
            font-size: 12px;
            color: #aaa;
            margin-left: 10px;
        }

        .navigation {
            display: flex;
            justify-content: space-between;
            margin-top: 30px;
        }

        .nav-button {
            flex: 1;
            margin: 0 5px;
        }

        .step-indicator {
            display: flex;
            justify-content: center;
            margin: 30px 0 15px;
        }

        .step {
            width: 10px;
            height: 10px;
            background-color: #333;
            border-radius: 50%;
            margin: 0 5px;
        }

        .step.active {
            background-color: #3c78d8;
            transform: scale(1.2);
        }

        .message {
            padding: 12px 16px;
            border-radius: 8px;
            margin-bottom: 16px;
            font-size: 14px;
            word-break: break-all;
            font-family: monospace;
        }

        .error {
            background-color: rgba(244, 67, 54, 0.1);
            color: #f44336;
            border: 1px solid #f44336;
        }

        .success {
            background-color: rgba(76, 175, 80, 0.1);
            color: #4CAF50;
            border: 1px solid #4CAF50;
        }

        .info {
            background-color: rgba(33, 150, 243, 0.1);
            color: #2196F3;
            border: 1px solid #2196F3;
        }

        .hidden {
            display: none;
        }

        .settings-link {
            text-align: center;
            margin-top: 20px;
        }

        .settings-link a {
            color: #3c78d8;
            text-decoration: none;
            font-size: 14px;
        }

        .settings-link a:hover {
            text-decoration: underline;
        }

        ::-webkit-scrollbar {
            width: 8px;
        }

        ::-webkit-scrollbar-track {
            background: #1e1e1e;
            border-radius: 4px;
        }

        ::-webkit-scrollbar-thumb {
            background: #444;
            border-radius: 4px;
        }

        ::-webkit-scrollbar-thumb:hover {
            background: #555;
        }

        @media (max-width: 430px) {
            .mobile-container {
                border-radius: 0;
                border: none;
                width: 100%;
                min-height: 100vh;
            }
        }

        @media (min-width: 768px) {
            .mobile-container {
                width: 400px;
            }
        }