* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        
        body { 
            font-family: 'Poppins', sans-serif;
            background: linear-gradient(135deg, #f9fafb 0%, #edf1f7 100%);
            color: #334155;
            min-height: 100vh;
            display: flex;
            justify-content: center;
            align-items: center;
            padding: 20px;
            overflow: hidden; /* Tambahkan ini agar tidak bisa di scroll */
        }
        
        /* Hilangkan box biru saat tap di mobile */
        button, .btn, input, .digit-group input, a, .resend-link {
            -webkit-tap-highlight-color: transparent;
        }
        
        .container {
            width: 100%;
            max-width: 420px;
            background: #fff;
            border-radius: 16px;
            box-shadow: 0 10px 30px rgba(0,0,0,0.08);
            padding: 35px 28px;
            position: relative;
            overflow: hidden;
            animation: fadeIn 0.6s ease-out forwards;
        }
        
        @keyframes fadeIn {
            from { opacity: 0; transform: translateY(20px); }
            to { opacity: 1; transform: translateY(0); }
        }
        
        .container::before {
            content: "";
            position: absolute;
            top: 0;
            left: 0;
            width: 6px;
            height: 100%;
            background: #17cbb3;
            border-radius: 16px 0 0 16px;
        }
        
        h2 {
            color: #17cbb3;
            text-align: center;
            margin-bottom: 24px;
            font-size: 1.75rem;
            font-weight: 600;
            position: relative;
        }
        
        h2::after {
            content: "";
            position: absolute;
            bottom: -8px;
            left: 50%;
            transform: translateX(-50%);
            width: 40px;
            height: 3px;
            background-color: #17cbb3;
            border-radius: 2px;
        }
        
        .otp-info {
            text-align: center;
            margin-bottom: 20px;
            font-size: 0.9rem;
            color: #64748b;
            padding: 0 5px;
        }
        
        .otp-info strong {
            word-break: break-all;
        }
        
        .digit-group {
            display: flex;
            gap: 8px;
            justify-content: center;
            margin-bottom: 20px;
        }
        
        .digit-group input {
            width: 40px;
            height: 50px;
            background-color: #f8fafc;
            border: 1px solid #e2e8f0;
            line-height: 50px;
            text-align: center;
            font-size: 1.2rem;
            font-weight: 500;
            border-radius: 8px;
            margin: 0 2px;
            transition: all 0.3s;
        }
        
        /* Mobile responsiveness for digit inputs */
        @media (max-width: 400px) {
            .digit-group input {
                width: 36px;
                height: 45px;
                font-size: 1.1rem;
                margin: 0 1px;
            }
            
            .container {
                padding: 28px 20px;
            }
            
            h2 {
                font-size: 1.5rem;
                margin-bottom: 20px;
            }
        }
        
        @media (max-width: 340px) {
            .digit-group input {
                width: 30px;
                height: 40px;
                font-size: 1rem;
            }
        }
        
        .digit-group input:focus {
            outline: none;
            border-color: #17cbb3;
            box-shadow: 0 0 0 3px rgba(23, 203, 179, 0.15);
            background: #fff;
        }
        
        .btn {
            width: 100%;
            padding: 14px;
            background: #17cbb3;
            color: #fff;
            border: none;
            border-radius: 10px;
            font-weight: 600;
            font-size: 1.05rem;
            cursor: pointer;
            transition: all 0.3s ease;
            box-shadow: 0 4px 10px rgba(23, 203, 179, 0.3);
            position: relative;
            overflow: hidden;
        }
        
        .btn:hover {
            transform: translateY(-2px);
            box-shadow: 0 6px 15px rgba(23, 203, 179, 0.35);
        }
        
        .btn:active {
            transform: translateY(1px);
        }
        
        .btn::after {
            content: "";
            position: absolute;
            top: 50%;
            left: 50%;
            width: 300px;
            height: 300px;
            background: rgba(255, 255, 255, 0.1);
            border-radius: 50%;
            transform: translate(-50%, -50%) scale(0);
            transition: transform 0.4s ease-out;
            opacity: 0;
        }
        
        .btn:hover::after {
            transform: translate(-50%, -50%) scale(1);
            opacity: 1;
        }
        
        .alert {
            color: #e53e3e;
            background: #fff5f5;
            border-left: 4px solid #e53e3e;
            border-radius: 6px;
            padding: 14px;
            margin-bottom: 20px;
            animation: slideInDown 0.4s ease-out forwards;
        }
        
        .alert ul {
            margin-left: 20px;
        }
        
        .success {
            color: #2f855a;
            background: #f0fff4;
            border-left: 4px solid #2f855a;
            border-radius: 6px;
            padding: 14px;
            margin-bottom: 20px;
            animation: slideInDown 0.4s ease-out forwards;
        }
        
        @keyframes slideInDown {
            from { opacity: 0; transform: translateY(-10px); }
            to { opacity: 1; transform: translateY(0); }
        }
        
        .resend-link {
            display: block;
            text-align: center;
            margin-top: 18px;
            color: #17cbb3;
            font-weight: 500;
            cursor: pointer;
            background: none;
            border: none;
            padding: 10px;
            width: 100%;
            border-radius: 8px;
            transition: all 0.3s;
        }
        
        .resend-link:hover:not([disabled]) {
            background: rgba(23, 203, 179, 0.08);
        }
        
        .resend-link[disabled] {
            color: #a0aec0;
            cursor: not-allowed;
        }
        
        #timer {
            text-align: center;
            color: #64748b;
            margin-top: 10px;
            font-size: 0.9rem;
            height: 20px;
            animation: pulse 2s infinite;
        }
        
        @keyframes pulse {
            0% { opacity: 0.6; }
            50% { opacity: 1; }
            100% { opacity: 0.6; }
        }
        
        /* Hide original input but keep it for form submission */
        .hidden-input {
            position: absolute;
            opacity: 0;
            pointer-events: none;
        }